[Maria-developers] bzr commit into Mariadb 5.2, with Maria 2.0:maria/5.2 branch (igor:2773)

#At lp:maria/5.2 based on revid:sergii@pisem.net-20100405095031-bgjy005pcftkp6g1 2773 Igor Babaev 2010-04-05 [merge] Merge of the code for partitioned key cache (mwl#85) into 5.2. added: mysql-test/r/select_pkeycache.result mysql-test/t/select_pkeycache-master.opt mysql-test/t/select_pkeycache.test modified: include/keycache.h mysql-test/r/information_schema.result mysql-test/r/information_schema_all_engines.result mysql-test/r/key_cache.result mysql-test/suite/funcs_1/r/is_columns_is.result mysql-test/suite/funcs_1/r/is_tables_is.result mysql-test/suite/pbxt/r/mysqlshow.result mysql-test/t/key_cache.test mysys/mf_keycache.c sql/handler.cc sql/handler.h sql/mysqld.cc sql/set_var.cc sql/set_var.h sql/sql_show.cc sql/sql_test.cc sql/table.h storage/myisam/mi_check.c storage/myisam/mi_close.c storage/myisam/mi_delete_all.c storage/myisam/mi_extra.c storage/myisam/mi_keycache.c storage/myisam/mi_locking.c storage/myisam/mi_page.c storage/myisam/mi_panic.c storage/myisam/mi_preload.c storage/myisam/mi_test1.c storage/myisam/mi_test2.c storage/myisam/mi_test3.c storage/myisam/myisam_ftdump.c storage/myisam/myisamchk.c storage/myisam/myisamdef.h storage/myisam/myisamlog.c === modified file 'include/keycache.h' --- a/include/keycache.h 2009-12-03 11:19:05 +0000 +++ b/include/keycache.h 2010-04-06 02:08:10 +0000 @@ -19,96 +19,156 @@ #define _keycache_h C_MODE_START -/* declare structures that is used by st_key_cache */ -struct st_block_link; -typedef struct st_block_link BLOCK_LINK; -struct st_keycache_page; -typedef struct st_keycache_page KEYCACHE_PAGE; -struct st_hash_link; -typedef struct st_hash_link HASH_LINK; -/* info about requests in a waiting queue */ -typedef struct st_keycache_wqueue +/* + Currently the default key cache is created as non-partitioned at + the start of the server unless the server is started with the parameter + --key-cache-partitions that is greater than 0 +*/ + +#define DEFAULT_KEY_CACHE_PARTITIONS 0 + +/* + MAX_KEY_CACHE_PARTITIONS cannot be greater than + sizeof(MYISAM_SHARE::dirty_part_map) + Currently sizeof(MYISAM_SHARE::dirty_part_map)=sizeof(ulonglong) +*/ + +#define MAX_KEY_CACHE_PARTITIONS 64 + +/* The structure to get statistical data about a key cache */ + +typedef struct st_key_cache_statistics { - struct st_my_thread_var *last_thread; /* circular list of waiting threads */ -} KEYCACHE_WQUEUE; + ulonglong mem_size; /* memory for cache buffers/auxiliary structures */ + ulonglong block_size; /* size of the each buffers in the key cache */ + ulonglong blocks_used; /* maximum number of used blocks/buffers */ + ulonglong blocks_unused; /* number of currently unused blocks */ + ulonglong blocks_changed; /* number of currently dirty blocks */ + ulonglong read_requests; /* number of read requests (read hits) */ + ulonglong reads; /* number of actual reads from files into buffers */ + ulonglong write_requests; /* number of write requests (write hits) */ + ulonglong writes; /* number of actual writes from buffers into files */ +} KEY_CACHE_STATISTICS; + +#define NUM_LONG_KEY_CACHE_STAT_VARIABLES 3 -#define CHANGED_BLOCKS_HASH 128 /* must be power of 2 */ +/* The type of a key cache object */ +typedef enum key_cache_type +{ + SIMPLE_KEY_CACHE, + PARTITIONED_KEY_CACHE +} KEY_CACHE_TYPE; + + +typedef + int (*INIT_KEY_CACHE) + (void *, uint key_cache_block_size, + size_t use_mem, uint division_limit, uint age_threshold); +typedef + int (*RESIZE_KEY_CACHE) + (void *, uint key_cache_block_size, + size_t use_mem, uint division_limit, uint age_threshold); +typedef + void (*CHANGE_KEY_CACHE_PARAM) + (void *keycache_cb, + uint division_limit, uint age_threshold); +typedef + uchar* (*KEY_CACHE_READ) + (void *keycache_cb, + File file, my_off_t filepos, int level, + uchar *buff, uint length, + uint block_length, int return_buffer); +typedef + int (*KEY_CACHE_INSERT) + (void *keycache_cb, + File file, my_off_t filepos, int level, + uchar *buff, uint length); +typedef + int (*KEY_CACHE_WRITE) + (void *keycache_cb, + File file, void *file_extra, + my_off_t filepos, int level, + uchar *buff, uint length, + uint block_length, int force_write); +typedef + int (*FLUSH_KEY_BLOCKS) + (void *keycache_cb, + int file, void *file_extra, + enum flush_type type); +typedef + int (*RESET_KEY_CACHE_COUNTERS) + (const char *name, void *keycache_cb); +typedef + void (*END_KEY_CACHE) + (void *keycache_cb, my_bool cleanup); +typedef + void (*GET_KEY_CACHE_STATISTICS) + (void *keycache_cb, uint partition_no, + KEY_CACHE_STATISTICS *key_cache_stats); +typedef + ulonglong (*GET_KEY_CACHE_STAT_VALUE) + (void *keycache_cb, uint var_no); /* - The key cache structure - It also contains read-only statistics parameters. + An object of the type KEY_CACHE_FUNCS contains pointers to all functions + from the key cache interface. + Currently a key cache can be of two types: simple and partitioned. + For each of them its own static structure of the type KEY_CACHE_FUNCS is + defined . The structures contain the pointers to the implementations of + the interface functions used by simple key caches and partitioned key + caches respectively. Pointers to these structures are assigned to key cache + objects at the time of their creation. */ +typedef struct st_key_cache_funcs +{ + INIT_KEY_CACHE init; + RESIZE_KEY_CACHE resize; + CHANGE_KEY_CACHE_PARAM change_param; + KEY_CACHE_READ read; + KEY_CACHE_INSERT insert; + KEY_CACHE_WRITE write; + FLUSH_KEY_BLOCKS flush; + RESET_KEY_CACHE_COUNTERS reset_counters; + END_KEY_CACHE end; + GET_KEY_CACHE_STATISTICS get_stats; + GET_KEY_CACHE_STAT_VALUE get_stat_val; +} KEY_CACHE_FUNCS; + + typedef struct st_key_cache { - my_bool key_cache_inited; - my_bool in_resize; /* true during resize operation */ - my_bool resize_in_flush; /* true during flush of resize operation */ + KEY_CACHE_TYPE key_cache_type; /* type of the key cache used for debugging */ + void *keycache_cb; /* control block of the used key cache */ + KEY_CACHE_FUNCS *interface_funcs; /* interface functions of the key cache */ + ulonglong param_buff_size; /* size the memory allocated for the cache */ + ulong param_block_size; /* size of the blocks in the key cache */ + ulong param_division_limit; /* min. percentage of warm blocks */ + ulong param_age_threshold; /* determines when hot block is downgraded */ + ulong param_partitions; /* number of the key cache partitions */ + my_bool key_cache_inited; /* <=> key cache has been created */ my_bool can_be_used; /* usage of cache for read/write is allowed */ - size_t key_cache_mem_size; /* specified size of the cache memory */ - uint key_cache_block_size; /* size of the page buffer of a cache block */ - ulong min_warm_blocks; /* min number of warm blocks; */ - ulong age_threshold; /* age threshold for hot blocks */ - ulonglong keycache_time; /* total number of block link operations */ - uint hash_entries; /* max number of entries in the hash table */ - int hash_links; /* max number of hash links */ - int hash_links_used; /* number of hash links currently used */ - int disk_blocks; /* max number of blocks in the cache */ - ulong blocks_used; /* maximum number of concurrently used blocks */ - ulong blocks_unused; /* number of currently unused blocks */ - ulong blocks_changed; /* number of currently dirty blocks */ - ulong warm_blocks; /* number of blocks in warm sub-chain */ - ulong cnt_for_resize_op; /* counter to block resize operation */ - long blocks_available; /* number of blocks available in the LRU chain */ - HASH_LINK **hash_root; /* arr. of entries into hash table buckets */ - HASH_LINK *hash_link_root; /* memory for hash table links */ - HASH_LINK *free_hash_list; /* list of free hash links */ - BLOCK_LINK *free_block_list; /* list of free blocks */ - BLOCK_LINK *block_root; /* memory for block links */ - uchar HUGE_PTR *block_mem; /* memory for block buffers */ - BLOCK_LINK *used_last; /* ptr to the last block of the LRU chain */ - BLOCK_LINK *used_ins; /* ptr to the insertion block in LRU chain */ - pthread_mutex_t cache_lock; /* to lock access to the cache structure */ - KEYCACHE_WQUEUE resize_queue; /* threads waiting during resize operation */ - /* - Waiting for a zero resize count. Using a queue for symmetry though - only one thread can wait here. - */ - KEYCACHE_WQUEUE waiting_for_resize_cnt; - KEYCACHE_WQUEUE waiting_for_hash_link; /* waiting for a free hash link */ - KEYCACHE_WQUEUE waiting_for_block; /* requests waiting for a free block */ - BLOCK_LINK *changed_blocks[CHANGED_BLOCKS_HASH]; /* hash for dirty file bl.*/ - BLOCK_LINK *file_blocks[CHANGED_BLOCKS_HASH]; /* hash for other file bl.*/ - - /* - The following variables are and variables used to hold parameters for - initializing the key cache. - */ - - ulonglong param_buff_size; /* size the memory allocated for the cache */ - ulong param_block_size; /* size of the blocks in the key cache */ - ulong param_division_limit; /* min. percentage of warm blocks */ - ulong param_age_threshold; /* determines when hot block is downgraded */ - - /* Statistics variables. These are reset in reset_key_cache_counters(). */ - ulong global_blocks_changed; /* number of currently dirty blocks */ + my_bool in_init; /* Set to 1 in MySQL during init/resize */ + uint partitions; /* actual number of partitions */ + size_t key_cache_mem_size; /* specified size of the cache memory */ + ulong blocks_used; /* maximum number of concurrently used blocks */ + ulong blocks_unused; /* number of currently unused blocks */ + ulong global_blocks_changed; /* number of currently dirty blocks */ ulonglong global_cache_w_requests;/* number of write requests (write hits) */ ulonglong global_cache_write; /* number of writes from cache to files */ ulonglong global_cache_r_requests;/* number of read requests (read hits) */ ulonglong global_cache_read; /* number of reads from files to cache */ - - int blocks; /* max number of blocks in the cache */ - my_bool in_init; /* Set to 1 in MySQL during init/resize */ } KEY_CACHE; + /* The default key cache */ extern KEY_CACHE dflt_key_cache_var, *dflt_key_cache; extern int init_key_cache(KEY_CACHE *keycache, uint key_cache_block_size, size_t use_mem, uint division_limit, - uint age_threshold); + uint age_threshold, uint partitions); extern int resize_key_cache(KEY_CACHE *keycache, uint key_cache_block_size, size_t use_mem, uint division_limit, uint age_threshold); @@ -122,12 +182,18 @@ extern int key_cache_insert(KEY_CACHE *k File file, my_off_t filepos, int level, uchar *buff, uint length); extern int key_cache_write(KEY_CACHE *keycache, - File file, my_off_t filepos, int level, + File file, void *file_extra, + my_off_t filepos, int level, uchar *buff, uint length, - uint block_length,int force_write); + uint block_length, int force_write); extern int flush_key_blocks(KEY_CACHE *keycache, - int file, enum flush_type type); + int file, void *file_extra, + enum flush_type type); extern void end_key_cache(KEY_CACHE *keycache, my_bool cleanup); +extern void get_key_cache_statistics(KEY_CACHE *keycache, + uint partition_no, + KEY_CACHE_STATISTICS *key_cache_stats); +extern ulonglong get_key_cache_stat_value(KEY_CACHE *keycache, uint var_no); /* Functions to handle multiple key caches */ extern my_bool multi_keycache_init(void); @@ -140,5 +206,11 @@ extern void multi_key_cache_change(KEY_C KEY_CACHE *new_data); extern int reset_key_cache_counters(const char *name, KEY_CACHE *key_cache); +extern int repartition_key_cache(KEY_CACHE *keycache, + uint key_cache_block_size, + size_t use_mem, + uint division_limit, + uint age_threshold, + uint partitions); C_MODE_END #endif /* _keycache_h */ === modified file 'mysql-test/r/information_schema.result' --- a/mysql-test/r/information_schema.result 2010-03-15 11:51:23 +0000 +++ b/mysql-test/r/information_schema.result 2010-03-29 21:16:12 +0000 @@ -69,6 +69,7 @@ INNODB_LOCK_WAITS INNODB_RSEG INNODB_TABLE_STATS INNODB_TRX +KEY_CACHES KEY_COLUMN_USAGE PARTITIONS PLUGINS === modified file 'mysql-test/r/information_schema_all_engines.result' --- a/mysql-test/r/information_schema_all_engines.result 2010-02-01 06:14:12 +0000 +++ b/mysql-test/r/information_schema_all_engines.result 2010-02-16 16:41:11 +0000 @@ -13,6 +13,7 @@ FILES GLOBAL_STATUS GLOBAL_VARIABLES INDEX_STATISTICS +KEY_CACHES KEY_COLUMN_USAGE PARTITIONS PLUGINS @@ -76,6 +77,7 @@ FILES TABLE_SCHEMA GLOBAL_STATUS VARIABLE_NAME GLOBAL_VARIABLES VARIABLE_NAME INDEX_STATISTICS TABLE_SCHEMA +KEY_CACHES KEY_CACHE_NAME KEY_COLUMN_USAGE CONSTRAINT_SCHEMA PARTITIONS TABLE_SCHEMA PLUGINS PLUGIN_NAME @@ -139,6 +141,7 @@ FILES TABLE_SCHEMA GLOBAL_STATUS VARIABLE_NAME GLOBAL_VARIABLES VARIABLE_NAME INDEX_STATISTICS TABLE_SCHEMA +KEY_CACHES KEY_CACHE_NAME KEY_COLUMN_USAGE CONSTRAINT_SCHEMA PARTITIONS TABLE_SCHEMA PLUGINS PLUGIN_NAME @@ -221,6 +224,7 @@ INNODB_LOCK_WAITS information_schema.INN INNODB_RSEG information_schema.INNODB_RSEG 1 INNODB_TABLE_STATS information_schema.INNODB_TABLE_STATS 1 INNODB_TRX information_schema.INNODB_TRX 1 +KEY_CACHES information_schema.KEY_CACHES 1 KEY_COLUMN_USAGE information_schema.KEY_COLUMN_USAGE 1 PARTITIONS information_schema.PARTITIONS 1 PBXT_STATISTICS information_schema.PBXT_STATISTICS 1 @@ -259,6 +263,7 @@ Database: information_schema | GLOBAL_STATUS | | GLOBAL_VARIABLES | | INDEX_STATISTICS | +| KEY_CACHES | | KEY_COLUMN_USAGE | | PARTITIONS | | PLUGINS | @@ -312,6 +317,7 @@ Database: INFORMATION_SCHEMA | GLOBAL_STATUS | | GLOBAL_VARIABLES | | INDEX_STATISTICS | +| KEY_CACHES | | KEY_COLUMN_USAGE | | PARTITIONS | | PLUGINS | @@ -357,5 +363,5 @@ Wildcard: inf_rmation_schema +--------------------+ SELECT table_schema, count(*) FROM information_schema.TABLES WHERE table_schema IN ('mysql', 'INFORMATION_SCHEMA', 'test', 'mysqltest') AND table_name<>'ndb_binlog_index' AND table_name<>'ndb_apply_status' GROUP BY TABLE_SCHEMA; table_schema count(*) -information_schema 48 +information_schema 49 mysql 22 === modified file 'mysql-test/r/key_cache.result' --- a/mysql-test/r/key_cache.result 2009-03-16 19:54:50 +0000 +++ b/mysql-test/r/key_cache.result 2010-04-01 21:42:40 +0000 @@ -1,5 +1,7 @@ drop table if exists t1, t2, t3; -SET @save_key_buffer=@@key_buffer_size; +SET @save_key_buffer_size=@@key_buffer_size; +SET @save_key_cache_block_size=@@key_cache_block_size; +SET @save_key_cache_partitions=@@key_cache_partitions; SELECT @@key_buffer_size, @@small.key_buffer_size; @@key_buffer_size @@small.key_buffer_size 2097152 131072 @@ -37,7 +39,7 @@ SELECT @@small.key_buffer_size; SELECT @@medium.key_buffer_size; @@medium.key_buffer_size 0 -SET @@global.key_buffer_size=@save_key_buffer; +SET @@global.key_buffer_size=@save_key_buffer_size; SELECT @@default.key_buffer_size; ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'default.key_buffer_size' at line 1 SELECT @@skr.storage_engine="test"; @@ -366,3 +368,432 @@ Variable_name Value key_cache_block_size 1536 SET GLOBAL key_cache_block_size= @bug28478_key_cache_block_size; DROP TABLE t1; +set global key_buffer_size=@save_key_buffer_size; +set global key_cache_block_size=@save_key_cache_block_size; +select @@key_buffer_size; +@@key_buffer_size +2097152 +select @@key_cache_block_size; +@@key_cache_block_size +1024 +select @@key_cache_partitions; +@@key_cache_partitions +0 +create table t1 ( +p int not null auto_increment primary key, +a char(10)); +create table t2 ( +p int not null auto_increment primary key, +i int, a char(10), key k1(i), key k2(a)); +select @@key_cache_partitions; +@@key_cache_partitions +0 +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default NULL NULL 2097152 1024 0 # 0 0 0 0 0 +small NULL NULL 1048576 1024 1 # 0 1 0 2 1 +insert into t1 values (1, 'qqqq'), (2, 'yyyy'); +insert into t2 values (1, 1, 'qqqq'), (2, 1, 'pppp'), +(3, 1, 'yyyy'), (4, 3, 'zzzz'); +select * from t1; +p a +1 qqqq +2 yyyy +select * from t2; +p i a +1 1 qqqq +2 1 pppp +3 1 yyyy +4 3 zzzz +update t1 set p=3 where p=1; +update t2 set i=2 where i=1; +show status like 'key_%'; +Variable_name Value +Key_blocks_not_flushed 0 +Key_blocks_unused KEY_BLOCKS_UNUSED +Key_blocks_used 4 +Key_read_requests 22 +Key_reads 0 +Key_write_requests 26 +Key_writes 6 +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default NULL NULL 2097152 1024 4 # 0 22 0 26 6 +small NULL NULL 1048576 1024 1 # 0 1 0 2 1 +delete from t2 where a='zzzz'; +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default NULL NULL 2097152 1024 4 # 0 29 0 32 9 +small NULL NULL 1048576 1024 1 # 0 1 0 2 1 +delete from t1; +delete from t2; +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default NULL NULL 2097152 1024 4 # 0 29 0 32 9 +small NULL NULL 1048576 1024 1 # 0 1 0 2 1 +set global key_cache_partitions=2; +select @@key_cache_partitions; +@@key_cache_partitions +2 +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default 2 NULL 2097152 1024 0 # 0 0 0 0 0 +small NULL NULL 1048576 1024 1 # 0 1 0 2 1 +insert into t1 values (1, 'qqqq'), (2, 'yyyy'); +insert into t2 values (1, 1, 'qqqq'), (2, 1, 'pppp'), +(3, 1, 'yyyy'), (4, 3, 'zzzz'); +select * from t1; +p a +1 qqqq +2 yyyy +select * from t2; +p i a +1 1 qqqq +2 1 pppp +3 1 yyyy +4 3 zzzz +update t1 set p=3 where p=1; +update t2 set i=2 where i=1; +show status like 'key_%'; +Variable_name Value +Key_blocks_not_flushed 0 +Key_blocks_unused KEY_BLOCKS_UNUSED +Key_blocks_used 4 +Key_read_requests 22 +Key_reads 0 +Key_write_requests 26 +Key_writes 6 +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default 2 NULL 2097152 1024 4 # 0 22 0 26 6 +small NULL NULL 1048576 1024 1 # 0 1 0 2 1 +delete from t1; +delete from t2; +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default 2 NULL 2097152 1024 4 # 0 22 0 26 6 +small NULL NULL 1048576 1024 1 # 0 1 0 2 1 +set global key_cache_partitions=1; +select @@key_cache_partitions; +@@key_cache_partitions +1 +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default 1 NULL 2097152 1024 0 # 0 0 0 0 0 +small NULL NULL 1048576 1024 1 # 0 1 0 2 1 +insert into t1 values (1, 'qqqq'), (2, 'yyyy'); +insert into t2 values (1, 1, 'qqqq'), (2, 1, 'pppp'), +(3, 1, 'yyyy'), (4, 3, 'zzzz'); +select * from t1; +p a +1 qqqq +2 yyyy +select * from t2; +p i a +1 1 qqqq +2 1 pppp +3 1 yyyy +4 3 zzzz +update t1 set p=3 where p=1; +update t2 set i=2 where i=1; +show status like 'key_%'; +Variable_name Value +Key_blocks_not_flushed 0 +Key_blocks_unused KEY_BLOCKS_UNUSED +Key_blocks_used 4 +Key_read_requests 22 +Key_reads 0 +Key_write_requests 26 +Key_writes 6 +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default 1 NULL 2097152 1024 4 # 0 22 0 26 6 +small NULL NULL 1048576 1024 1 # 0 1 0 2 1 +delete from t1; +delete from t2; +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default 1 NULL 2097152 1024 4 # 0 22 0 26 6 +small NULL NULL 1048576 1024 1 # 0 1 0 2 1 +flush tables; +flush status; +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default 1 NULL 2097152 1024 4 # 0 0 0 0 0 +small NULL NULL 1048576 1024 1 # 0 0 0 0 0 +set global key_buffer_size=32*1024; +select @@key_buffer_size; +@@key_buffer_size +32768 +set global key_cache_partitions=2; +select @@key_cache_partitions; +@@key_cache_partitions +2 +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default 2 NULL 32768 1024 0 # 0 0 0 0 0 +small NULL NULL 1048576 1024 1 # 0 0 0 0 0 +insert into t1 values (1, 'qqqq'), (2, 'yyyy'); +insert into t2 values (1, 1, 'qqqq'), (2, 1, 'pppp'), +(3, 1, 'yyyy'), (4, 3, 'zzzz'); +select * from t1; +p a +1 qqqq +2 yyyy +select * from t2; +p i a +1 1 qqqq +2 1 pppp +3 1 yyyy +4 3 zzzz +update t1 set p=3 where p=1; +update t2 set i=2 where i=1; +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default 2 NULL 32768 1024 4 # 0 22 0 26 6 +small NULL NULL 1048576 1024 1 # 0 0 0 0 0 +insert into t1(a) select a from t1; +insert into t1(a) select a from t1; +insert into t1(a) select a from t1; +insert into t1(a) select a from t1; +insert into t1(a) select a from t1; +insert into t1(a) select a from t1; +insert into t1(a) select a from t1; +insert into t1(a) select a from t1; +insert into t2(i,a) select i,a from t2; +insert into t2(i,a) select i,a from t2; +insert into t2(i,a) select i,a from t2; +insert into t2(i,a) select i,a from t2; +insert into t2(i,a) select i,a from t2; +insert into t2(i,a) select i,a from t2; +insert into t2(i,a) select i,a from t2; +insert into t2(i,a) select i,a from t2; +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default 2 NULL 32768 1024 # # 0 6733 # 3684 103 +small NULL NULL 1048576 1024 # # 0 0 # 0 0 +select * from t1 where p between 1010 and 1020 ; +p a +select * from t2 where p between 1010 and 1020 ; +p i a +1010 2 pppp +1011 2 yyyy +1012 3 zzzz +1013 2 qqqq +1014 2 pppp +1015 2 yyyy +1016 3 zzzz +1017 2 qqqq +1018 2 pppp +1019 2 yyyy +1020 3 zzzz +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default 2 NULL 32768 1024 # # 0 6750 # 3684 103 +small NULL NULL 1048576 1024 # # 0 0 # 0 0 +flush tables; +flush status; +update t1 set a='zzzz' where a='qqqq'; +update t2 set i=1 where i=2; +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default 2 NULL 32768 1024 # # 0 3076 18 1552 18 +small NULL NULL 1048576 1024 # # 0 0 0 0 0 +set global keycache1.key_buffer_size=256*1024; +select @@keycache1.key_buffer_size; +@@keycache1.key_buffer_size +262144 +set global keycache1.key_cache_partitions=7; +select @@keycache1.key_cache_partitions; +@@keycache1.key_cache_partitions +7 +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default 2 NULL 32768 1024 # # 0 3076 18 1552 18 +small NULL NULL 1048576 1024 # # 0 0 0 0 0 +keycache1 7 NULL 262143 2048 # # 0 0 0 0 0 +select * from information_schema.key_caches where key_cache_name like "key%" + and partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +keycache1 7 NULL 262143 2048 0 # 0 0 0 0 0 +cache index t1 key (`primary`) in keycache1; +Table Op Msg_type Msg_text +test.t1 assign_to_keycache status OK +explain select p from t1 where p between 1010 and 1020; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 range PRIMARY PRIMARY 4 NULL 1 Using where; Using index +select p from t1 where p between 1010 and 1020; +p +explain select i from t2 where p between 1010 and 1020; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 range PRIMARY PRIMARY 4 NULL 28 Using where +select i from t2 where p between 1010 and 1020; +i +1 +1 +3 +1 +1 +1 +3 +1 +1 +1 +3 +explain select count(*) from t1, t2 where t1.p = t2.i; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 index k1 k1 5 NULL 1024 Using index +1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.i 1 Using index +select count(*) from t1, t2 where t1.p = t2.i; +count(*) +256 +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default 2 NULL 32768 1024 # # 0 3172 24 1552 18 +small NULL NULL 1048576 1024 # # 0 0 0 0 0 +keycache1 7 NULL 262143 2048 # # 0 14 3 0 0 +select * from information_schema.key_caches where key_cache_name like "key%" + and partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +keycache1 7 NULL 262143 2048 3 # 0 14 3 0 0 +cache index t2 in keycache1; +Table Op Msg_type Msg_text +test.t2 assign_to_keycache status OK +update t2 set p=p+3000, i=2 where a='qqqq'; +select * from information_schema.key_caches where key_cache_name like "key%" + and partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +keycache1 7 NULL 262143 2048 25 # 0 2082 25 1071 19 +set global keycache2.key_buffer_size=1024*1024; +cache index t2 in keycache2; +Table Op Msg_type Msg_text +test.t2 assign_to_keycache status OK +insert into t2 values (2000, 3, 'yyyy'); +select * from information_schema.key_caches where key_cache_name like "keycache2" + and partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +keycache2 NULL NULL 1048576 1024 6 # 0 6 6 3 3 +select * from information_schema.key_caches where key_cache_name like "key%" +and partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +keycache1 7 NULL 262143 2048 25 # 0 2082 25 1071 19 +keycache2 NULL NULL 1048576 1024 6 # 0 6 6 3 3 +cache index t2 in keycache1; +Table Op Msg_type Msg_text +test.t2 assign_to_keycache status OK +update t2 set p=p+5000 where a='zzzz'; +select * from t2 where p between 1010 and 1020; +p i a +1010 1 pppp +1011 1 yyyy +1014 1 pppp +1015 1 yyyy +1018 1 pppp +1019 1 yyyy +explain select p from t2 where p between 1010 and 1020; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 range PRIMARY PRIMARY 4 NULL 7 Using where; Using index +select p from t2 where p between 1010 and 1020; +p +1010 +1011 +1014 +1015 +1018 +1019 +explain select i from t2 where a='yyyy' and i=3; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ref k1,k2 k1 5 const 188 Using where +select i from t2 where a='yyyy' and i=3; +i +3 +explain select a from t2 where a='yyyy' and i=3; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ref k1,k2 k1 5 const 188 Using where +select a from t2 where a='yyyy' and i=3 ; +a +yyyy +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default 2 NULL 32768 1024 # # 0 3172 24 1552 18 +small NULL NULL 1048576 1024 # # 0 0 0 0 0 +keycache1 7 NULL 262143 2048 # # 0 3201 43 1594 30 +keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3 +set global keycache1.key_cache_block_size=2*1024; +insert into t2 values (7000, 3, 'yyyy'); +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default 2 NULL 32768 1024 # # 0 3172 24 1552 18 +small NULL NULL 1048576 1024 # # 0 0 0 0 0 +keycache1 7 NULL 262143 2048 # # 0 6 6 3 3 +keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3 +set global keycache1.key_cache_block_size=8*1024; +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default 2 NULL 32768 1024 # # 0 3172 24 1552 18 +small NULL NULL 1048576 1024 # # 0 0 0 0 0 +keycache1 3 NULL 262143 8192 # # 0 0 0 0 0 +keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3 +insert into t2 values (8000, 3, 'yyyy'); +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default 2 NULL 32768 1024 # # 0 3172 24 1552 18 +small NULL NULL 1048576 1024 # # 0 0 0 0 0 +keycache1 3 NULL 262143 8192 # # 0 6 5 3 3 +keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3 +set global keycache1.key_buffer_size=64*1024; +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default 2 NULL 32768 1024 # # 0 3172 24 1552 18 +small NULL NULL 1048576 1024 # # 0 0 0 0 0 +keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3 +set global keycache1.key_cache_block_size=2*1024; +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default 2 NULL 32768 1024 # # 0 3172 24 1552 18 +small NULL NULL 1048576 1024 # # 0 0 0 0 0 +keycache1 3 NULL 65535 2048 # # 0 0 0 0 0 +keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3 +set global keycache1.key_cache_block_size=8*1024; +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default 2 NULL 32768 1024 # # 0 3172 24 1552 18 +small NULL NULL 1048576 1024 # # 0 0 0 0 0 +keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3 +set global keycache1.key_buffer_size=0; +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default 2 NULL 32768 1024 # # 0 3172 24 1552 18 +small NULL NULL 1048576 1024 # # 0 0 0 0 0 +keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3 +set global keycache1.key_cache_block_size=8*1024; +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default 2 NULL 32768 1024 # # 0 3172 24 1552 18 +small NULL NULL 1048576 1024 # # 0 0 0 0 0 +keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3 +set global keycache1.key_buffer_size=0; +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default 2 NULL 32768 1024 # # 0 3172 24 1552 18 +small NULL NULL 1048576 1024 # # 0 0 0 0 0 +keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3 +set global keycache1.key_buffer_size=128*1024; +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default 2 NULL 32768 1024 # # 0 3172 24 1552 18 +small NULL NULL 1048576 1024 # # 0 0 0 0 0 +keycache1 1 NULL 131072 8192 # # 0 0 0 0 0 +keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3 +set global keycache1.key_cache_block_size=1024; +select * from information_schema.key_caches where partition_number is null; +KEY_CACHE_NAME PARTITIONS PARTITION_NUMBER FULL_SIZE BLOCK_SIZE USED_BLOCKS UNUSED_BLOCKS DIRTY_BLOCKS READ_REQUESTS READS WRITE_REQUESTS WRITES +default 2 NULL 32768 1024 # # 0 3172 24 1552 18 +small NULL NULL 1048576 1024 # # 0 0 0 0 0 +keycache1 7 NULL 131068 1024 # # 0 0 0 0 0 +keycache2 NULL NULL 1048576 1024 # # 0 6 6 3 3 +drop table t1,t2; +set global keycache1.key_buffer_size=0; +set global keycache2.key_buffer_size=0; +set global key_buffer_size=@save_key_buffer_size; +set global key_cache_partitions=@save_key_cache_partitions; === added file 'mysql-test/r/select_pkeycache.result' --- a/mysql-test/r/select_pkeycache.result 1970-01-01 00:00:00 +0000 +++ b/mysql-test/r/select_pkeycache.result 2010-03-29 21:16:12 +0000 @@ -0,0 +1,4784 @@ +drop table if exists t1,t2,t3,t4,t11; +drop table if exists t1_1,t1_2,t9_1,t9_2,t1aa,t2aa; +drop view if exists v1; +CREATE TABLE t1 ( +Period smallint(4) unsigned zerofill DEFAULT '0000' NOT NULL, +Varor_period smallint(4) unsigned DEFAULT '0' NOT NULL +); +INSERT INTO t1 VALUES (9410,9412); +select period from t1; +period +9410 +select * from t1; +Period Varor_period +9410 9412 +select t1.* from t1; +Period Varor_period +9410 9412 +CREATE TABLE t2 ( +auto int not null auto_increment, +fld1 int(6) unsigned zerofill DEFAULT '000000' NOT NULL, +companynr tinyint(2) unsigned zerofill DEFAULT '00' NOT NULL, +fld3 char(30) DEFAULT '' NOT NULL, +fld4 char(35) DEFAULT '' NOT NULL, +fld5 char(35) DEFAULT '' NOT NULL, +fld6 char(4) DEFAULT '' NOT NULL, +UNIQUE fld1 (fld1), +KEY fld3 (fld3), +PRIMARY KEY (auto) +); +select t2.fld3 from t2 where companynr = 58 and fld3 like "%imaginable%"; +fld3 +imaginable +select fld3 from t2 where fld3 like "%cultivation" ; +fld3 +cultivation +select t2.fld3,companynr from t2 where companynr = 57+1 order by fld3; +fld3 companynr +concoct 58 +druggists 58 +engrossing 58 +Eurydice 58 +exclaimers 58 +ferociousness 58 +hopelessness 58 +Huey 58 +imaginable 58 +judges 58 +merging 58 +ostrich 58 +peering 58 +Phelps 58 +presumes 58 +Ruth 58 +sentences 58 +Shylock 58 +straggled 58 +synergy 58 +thanking 58 +tying 58 +unlocks 58 +select fld3,companynr from t2 where companynr = 58 order by fld3; +fld3 companynr +concoct 58 +druggists 58 +engrossing 58 +Eurydice 58 +exclaimers 58 +ferociousness 58 +hopelessness 58 +Huey 58 +imaginable 58 +judges 58 +merging 58 +ostrich 58 +peering 58 +Phelps 58 +presumes 58 +Ruth 58 +sentences 58 +Shylock 58 +straggled 58 +synergy 58 +thanking 58 +tying 58 +unlocks 58 +select fld3 from t2 order by fld3 desc limit 10; +fld3 +youthfulness +yelped +Wotan +workers +Witt +witchcraft +Winsett +Willy +willed +wildcats +select fld3 from t2 order by fld3 desc limit 5; +fld3 +youthfulness +yelped +Wotan +workers +Witt +select fld3 from t2 order by fld3 desc limit 5,5; +fld3 +witchcraft +Winsett +Willy +willed +wildcats +select t2.fld3 from t2 where fld3 = 'honeysuckle'; +fld3 +honeysuckle +select t2.fld3 from t2 where fld3 LIKE 'honeysuckl_'; +fld3 +honeysuckle +select t2.fld3 from t2 where fld3 LIKE 'hon_ysuckl_'; +fld3 +honeysuckle +select t2.fld3 from t2 where fld3 LIKE 'honeysuckle%'; +fld3 +honeysuckle +select t2.fld3 from t2 where fld3 LIKE 'h%le'; +fld3 +honeysuckle +select t2.fld3 from t2 where fld3 LIKE 'honeysuckle_'; +fld3 +select t2.fld3 from t2 where fld3 LIKE 'don_t_find_me_please%'; +fld3 +explain select t2.fld3 from t2 where fld3 = 'honeysuckle'; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ref fld3 fld3 30 const 1 Using where; Using index +explain select fld3 from t2 ignore index (fld3) where fld3 = 'honeysuckle'; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where +explain select fld3 from t2 use index (fld1) where fld3 = 'honeysuckle'; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where +explain select fld3 from t2 use index (fld3) where fld3 = 'honeysuckle'; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ref fld3 fld3 30 const 1 Using where; Using index +explain select fld3 from t2 use index (fld1,fld3) where fld3 = 'honeysuckle'; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ref fld3 fld3 30 const 1 Using where; Using index +explain select fld3 from t2 ignore index (fld3,not_used); +ERROR 42000: Key 'not_used' doesn't exist in table 't2' +explain select fld3 from t2 use index (not_used); +ERROR 42000: Key 'not_used' doesn't exist in table 't2' +select t2.fld3 from t2 where fld3 >= 'honeysuckle' and fld3 <= 'honoring' order by fld3; +fld3 +honeysuckle +honoring +explain select t2.fld3 from t2 where fld3 >= 'honeysuckle' and fld3 <= 'honoring' order by fld3; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 range fld3 fld3 30 NULL 2 Using where; Using index +select fld1,fld3 from t2 where fld3="Colombo" or fld3 = "nondecreasing" order by fld3; +fld1 fld3 +148504 Colombo +068305 Colombo +000000 nondecreasing +select fld1,fld3 from t2 where companynr = 37 and fld3 = 'appendixes'; +fld1 fld3 +232605 appendixes +1232605 appendixes +1232606 appendixes +1232607 appendixes +1232608 appendixes +1232609 appendixes +select fld1 from t2 where fld1=250501 or fld1="250502"; +fld1 +250501 +250502 +explain select fld1 from t2 where fld1=250501 or fld1="250502"; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 range fld1 fld1 4 NULL 2 Using where; Using index +select fld1 from t2 where fld1=250501 or fld1=250502 or fld1 >= 250505 and fld1 <= 250601 or fld1 between 250501 and 250502; +fld1 +250501 +250502 +250505 +250601 +explain select fld1 from t2 where fld1=250501 or fld1=250502 or fld1 >= 250505 and fld1 <= 250601 or fld1 between 250501 and 250502; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 range fld1 fld1 4 NULL 4 Using where; Using index +select fld1,fld3 from t2 where companynr = 37 and fld3 like 'f%'; +fld1 fld3 +218401 faithful +018007 fanatic +228311 fated +018017 featherweight +218022 feed +088303 feminine +058004 Fenton +038017 fetched +018054 fetters +208101 fiftieth +238007 filial +013606 fingerings +218008 finishers +038205 firearm +188505 fitting +202301 Fitzpatrick +238008 fixedly +012001 flanking +018103 flint +018104 flopping +188007 flurried +013602 foldout +226205 foothill +232102 forgivably +228306 forthcoming +186002 freakish +208113 freest +231315 freezes +036002 funereal +226209 furnishings +198006 furthermore +select fld3 from t2 where fld3 like "L%" and fld3 = "ok"; +fld3 +select fld3 from t2 where (fld3 like "C%" and fld3 = "Chantilly"); +fld3 +Chantilly +select fld1,fld3 from t2 where fld1 like "25050%"; +fld1 fld3 +250501 poisoning +250502 Iraqis +250503 heaving +250504 population +250505 bomb +select fld1,fld3 from t2 where fld1 like "25050_"; +fld1 fld3 +250501 poisoning +250502 Iraqis +250503 heaving +250504 population +250505 bomb +select distinct companynr from t2; +companynr +00 +37 +36 +50 +58 +29 +40 +53 +65 +41 +34 +68 +select distinct companynr from t2 order by companynr; +companynr +00 +29 +34 +36 +37 +40 +41 +50 +53 +58 +65 +68 +select distinct companynr from t2 order by companynr desc; +companynr +68 +65 +58 +53 +50 +41 +40 +37 +36 +34 +29 +00 +select distinct t2.fld3,period from t2,t1 where companynr=37 and fld3 like "O%"; +fld3 period +obliterates 9410 +offload 9410 +opaquely 9410 +organizer 9410 +overestimating 9410 +overlay 9410 +select distinct fld3 from t2 where companynr = 34 order by fld3; +fld3 +absentee +accessed +ahead +alphabetic +Asiaticizations +attitude +aye +bankruptcies +belays +Blythe +bomb +boulevard +bulldozes +cannot +caressing +charcoal +checksumming +chess +clubroom +colorful +cosy +creator +crying +Darius +diffusing +duality +Eiffel +Epiphany +Ernestine +explorers +exterminated +famine +forked +Gershwins +heaving +Hodges +Iraqis +Italianization +Lagos +landslide +libretto +Majorca +mastering +narrowed +occurred +offerers +Palestine +Peruvianizes +pharmaceutic +poisoning +population +Pygmalion +rats +realest +recording +regimented +retransmitting +reviver +rouses +scars +sicker +sleepwalk +stopped +sugars +translatable +uncles +unexpected +uprisings +versatility +vest +select distinct fld3 from t2 limit 10; +fld3 +abates +abiding +Abraham +abrogating +absentee +abut +accessed +accruing +accumulating +accuracies +select distinct fld3 from t2 having fld3 like "A%" limit 10; +fld3 +abates +abiding +Abraham +abrogating +absentee +abut +accessed +accruing +accumulating +accuracies +select distinct substring(fld3,1,3) from t2 where fld3 like "A%"; +substring(fld3,1,3) +aba +abi +Abr +abs +abu +acc +acq +acu +Ade +adj +Adl +adm +Ado +ads +adv +aer +aff +afi +afl +afo +agi +ahe +aim +air +Ald +alg +ali +all +alp +alr +ama +ame +amm +ana +and +ane +Ang +ani +Ann +Ant +api +app +aqu +Ara +arc +Arm +arr +Art +Asi +ask +asp +ass +ast +att +aud +Aug +aut +ave +avo +awe +aye +Azt +select distinct substring(fld3,1,3) as a from t2 having a like "A%" order by a limit 10; +a +aba +abi +Abr +abs +abu +acc +acq +acu +Ade +adj +select distinct substring(fld3,1,3) from t2 where fld3 like "A%" limit 10; +substring(fld3,1,3) +aba +abi +Abr +abs +abu +acc +acq +acu +Ade +adj +select distinct substring(fld3,1,3) as a from t2 having a like "A%" limit 10; +a +aba +abi +Abr +abs +abu +acc +acq +acu +Ade +adj +create table t3 ( +period int not null, +name char(32) not null, +companynr int not null, +price double(11,0), +price2 double(11,0), +key (period), +key (name) +); +create temporary table tmp engine = myisam select * from t3; +insert into t3 select * from tmp; +insert into tmp select * from t3; +insert into t3 select * from tmp; +insert into tmp select * from t3; +insert into t3 select * from tmp; +insert into tmp select * from t3; +insert into t3 select * from tmp; +insert into tmp select * from t3; +insert into t3 select * from tmp; +insert into tmp select * from t3; +insert into t3 select * from tmp; +insert into tmp select * from t3; +insert into t3 select * from tmp; +insert into tmp select * from t3; +insert into t3 select * from tmp; +insert into tmp select * from t3; +insert into t3 select * from tmp; +alter table t3 add t2nr int not null auto_increment primary key first; +drop table tmp; +SET SQL_BIG_TABLES=1; +select distinct concat(fld3," ",fld3) as namn from t2,t3 where t2.fld1=t3.t2nr order by namn limit 10; +namn +Abraham Abraham +abrogating abrogating +admonishing admonishing +Adolph Adolph +afield afield +aging aging +ammonium ammonium +analyzable analyzable +animals animals +animized animized +SET SQL_BIG_TABLES=0; +select distinct concat(fld3," ",fld3) from t2,t3 where t2.fld1=t3.t2nr order by fld3 limit 10; +concat(fld3," ",fld3) +Abraham Abraham +abrogating abrogating +admonishing admonishing +Adolph Adolph +afield afield +aging aging +ammonium ammonium +analyzable analyzable +animals animals +animized animized +select distinct fld5 from t2 limit 10; +fld5 +neat +Steinberg +jarring +tinily +balled +persist +attainments +fanatic +measures +rightfulness +select distinct fld3,count(*) from t2 group by companynr,fld3 limit 10; +fld3 count(*) +affixed 1 +and 1 +annoyers 1 +Anthony 1 +assayed 1 +assurers 1 +attendants 1 +bedlam 1 +bedpost 1 +boasted 1 +SET SQL_BIG_TABLES=1; +select distinct fld3,count(*) from t2 group by companynr,fld3 limit 10; +fld3 count(*) +affixed 1 +and 1 +annoyers 1 +Anthony 1 +assayed 1 +assurers 1 +attendants 1 +bedlam 1 +bedpost 1 +boasted 1 +SET SQL_BIG_TABLES=0; +select distinct fld3,repeat("a",length(fld3)),count(*) from t2 group by companynr,fld3 limit 100,10; +fld3 repeat("a",length(fld3)) count(*) +circus aaaaaa 1 +cited aaaaa 1 +Colombo aaaaaaa 1 +congresswoman aaaaaaaaaaaaa 1 +contrition aaaaaaaaaa 1 +corny aaaaa 1 +cultivation aaaaaaaaaaa 1 +definiteness aaaaaaaaaaaa 1 +demultiplex aaaaaaaaaaa 1 +disappointing aaaaaaaaaaaaa 1 +select distinct companynr,rtrim(space(512+companynr)) from t3 order by 1,2; +companynr rtrim(space(512+companynr)) +37 +78 +101 +154 +311 +447 +512 +select distinct fld3 from t2,t3 where t2.companynr = 34 and t2.fld1=t3.t2nr order by fld3; +fld3 +explain select t3.t2nr,fld3 from t2,t3 where t2.companynr = 34 and t2.fld1=t3.t2nr order by t3.t2nr,fld3; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ALL fld1 NULL NULL NULL 1199 Using where; Using temporary; Using filesort +1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.fld1 1 Using where; Using index +explain select * from t3 as t1,t3 where t1.period=t3.period order by t3.period; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL period NULL NULL NULL 41810 Using temporary; Using filesort +1 SIMPLE t3 ref period period 4 test.t1.period 4181 +explain select * from t3 as t1,t3 where t1.period=t3.period order by t3.period limit 10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t3 index period period 4 NULL 1 +1 SIMPLE t1 ref period period 4 test.t3.period 4181 +explain select * from t3 as t1,t3 where t1.period=t3.period order by t1.period limit 10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index period period 4 NULL 1 +1 SIMPLE t3 ref period period 4 test.t1.period 4181 +select period from t1; +period +9410 +select period from t1 where period=1900; +period +select fld3,period from t1,t2 where fld1 = 011401 order by period; +fld3 period +breaking 9410 +select fld3,period from t2,t3 where t2.fld1 = 011401 and t2.fld1=t3.t2nr and t3.period=1001; +fld3 period +breaking 1001 +explain select fld3,period from t2,t3 where t2.fld1 = 011401 and t3.t2nr=t2.fld1 and 1001 = t3.period; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 const fld1 fld1 4 const 1 +1 SIMPLE t3 const PRIMARY,period PRIMARY 4 const 1 +select fld3,period from t2,t1 where companynr*10 = 37*10; +fld3 period +breaking 9410 +Romans 9410 +intercepted 9410 +bewilderingly 9410 +astound 9410 +admonishing 9410 +sumac 9410 +flanking 9410 +combed 9410 +subjective 9410 +scatterbrain 9410 +Eulerian 9410 +Kane 9410 +overlay 9410 +perturb 9410 +goblins 9410 +annihilates 9410 +Wotan 9410 +snatching 9410 +concludes 9410 +laterally 9410 +yelped 9410 +grazing 9410 +Baird 9410 +celery 9410 +misunderstander 9410 +handgun 9410 +foldout 9410 +mystic 9410 +succumbed 9410 +Nabisco 9410 +fingerings 9410 +aging 9410 +afield 9410 +ammonium 9410 +boat 9410 +intelligibility 9410 +Augustine 9410 +teethe 9410 +dreaded 9410 +scholastics 9410 +audiology 9410 +wallet 9410 +parters 9410 +eschew 9410 +quitter 9410 +neat 9410 +Steinberg 9410 +jarring 9410 +tinily 9410 +balled 9410 +persist 9410 +attainments 9410 +fanatic 9410 +measures 9410 +rightfulness 9410 +capably 9410 +impulsive 9410 +starlet 9410 +terminators 9410 +untying 9410 +announces 9410 +featherweight 9410 +pessimist 9410 +daughter 9410 +decliner 9410 +lawgiver 9410 +stated 9410 +readable 9410 +attrition 9410 +cascade 9410 +motors 9410 +interrogate 9410 +pests 9410 +stairway 9410 +dopers 9410 +testicle 9410 +Parsifal 9410 +leavings 9410 +postulation 9410 +squeaking 9410 +contrasted 9410 +leftover 9410 +whiteners 9410 +erases 9410 +Punjab 9410 +Merritt 9410 +Quixotism 9410 +sweetish 9410 +dogging 9410 +scornfully 9410 +bellow 9410 +bills 9410 +cupboard 9410 +sureties 9410 +puddings 9410 +fetters 9410 +bivalves 9410 +incurring 9410 +Adolph 9410 +pithed 9410 +Miles 9410 +trimmings 9410 +tragedies 9410 +skulking 9410 +flint 9410 +flopping 9410 +relaxing 9410 +offload 9410 +suites 9410 +lists 9410 +animized 9410 +multilayer 9410 +standardizes 9410 +Judas 9410 +vacuuming 9410 +dentally 9410 +humanness 9410 +inch 9410 +Weissmuller 9410 +irresponsibly 9410 +luckily 9410 +culled 9410 +medical 9410 +bloodbath 9410 +subschema 9410 +animals 9410 +Micronesia 9410 +repetitions 9410 +Antares 9410 +ventilate 9410 +pityingly 9410 +interdependent 9410 +Graves 9410 +neonatal 9410 +chafe 9410 +honoring 9410 +realtor 9410 +elite 9410 +funereal 9410 +abrogating 9410 +sorters 9410 +Conley 9410 +lectured 9410 +Abraham 9410 +Hawaii 9410 +cage 9410 +hushes 9410 +Simla 9410 +reporters 9410 +Dutchman 9410 +descendants 9410 +groupings 9410 +dissociate 9410 +coexist 9410 +Beebe 9410 +Taoism 9410 +Connally 9410 +fetched 9410 +checkpoints 9410 +rusting 9410 +galling 9410 +obliterates 9410 +traitor 9410 +resumes 9410 +analyzable 9410 +terminator 9410 +gritty 9410 +firearm 9410 +minima 9410 +Selfridge 9410 +disable 9410 +witchcraft 9410 +betroth 9410 +Manhattanize 9410 +imprint 9410 +peeked 9410 +swelling 9410 +interrelationships 9410 +riser 9410 +Gandhian 9410 +peacock 9410 +bee 9410 +kanji 9410 +dental 9410 +scarf 9410 +chasm 9410 +insolence 9410 +syndicate 9410 +alike 9410 +imperial 9410 +convulsion 9410 +railway 9410 +validate 9410 +normalizes 9410 +comprehensive 9410 +chewing 9410 +denizen 9410 +schemer 9410 +chronicle 9410 +Kline 9410 +Anatole 9410 +partridges 9410 +brunch 9410 +recruited 9410 +dimensions 9410 +Chicana 9410 +announced 9410 +praised 9410 +employing 9410 +linear 9410 +quagmire 9410 +western 9410 +relishing 9410 +serving 9410 +scheduling 9410 +lore 9410 +eventful 9410 +arteriole 9410 +disentangle 9410 +cured 9410 +Fenton 9410 +avoidable 9410 +drains 9410 +detectably 9410 +husky 9410 +impelling 9410 +undoes 9410 +evened 9410 +squeezes 9410 +destroyer 9410 +rudeness 9410 +beaner 9410 +boorish 9410 +Everhart 9410 +encompass 9410 +mushrooms 9410 +Alison 9410 +externally 9410 +pellagra 9410 +cult 9410 +creek 9410 +Huffman 9410 +Majorca 9410 +governing 9410 +gadfly 9410 +reassigned 9410 +intentness 9410 +craziness 9410 +psychic 9410 +squabbled 9410 +burlesque 9410 +capped 9410 +extracted 9410 +DiMaggio 9410 +exclamation 9410 +subdirectory 9410 +Gothicism 9410 +feminine 9410 +metaphysically 9410 +sanding 9410 +Miltonism 9410 +freakish 9410 +index 9410 +straight 9410 +flurried 9410 +denotative 9410 +coming 9410 +commencements 9410 +gentleman 9410 +gifted 9410 +Shanghais 9410 +sportswriting 9410 +sloping 9410 +navies 9410 +leaflet 9410 +shooter 9410 +Joplin 9410 +babies 9410 +assails 9410 +admiring 9410 +swaying 9410 +Goldstine 9410 +fitting 9410 +Norwalk 9410 +analogy 9410 +deludes 9410 +cokes 9410 +Clayton 9410 +exhausts 9410 +causality 9410 +sating 9410 +icon 9410 +throttles 9410 +communicants 9410 +dehydrate 9410 +priceless 9410 +publicly 9410 +incidentals 9410 +commonplace 9410 +mumbles 9410 +furthermore 9410 +cautioned 9410 +parametrized 9410 +registration 9410 +sadly 9410 +positioning 9410 +babysitting 9410 +eternal 9410 +hoarder 9410 +congregates 9410 +rains 9410 +workers 9410 +sags 9410 +unplug 9410 +garage 9410 +boulder 9410 +specifics 9410 +Teresa 9410 +Winsett 9410 +convenient 9410 +buckboards 9410 +amenities 9410 +resplendent 9410 +sews 9410 +participated 9410 +Simon 9410 +certificates 9410 +Fitzpatrick 9410 +Evanston 9410 +misted 9410 +textures 9410 +save 9410 +count 9410 +rightful 9410 +chaperone 9410 +Lizzy 9410 +clenched 9410 +effortlessly 9410 +accessed 9410 +beaters 9410 +Hornblower 9410 +vests 9410 +indulgences 9410 +infallibly 9410 +unwilling 9410 +excrete 9410 +spools 9410 +crunches 9410 +overestimating 9410 +ineffective 9410 +humiliation 9410 +sophomore 9410 +star 9410 +rifles 9410 +dialysis 9410 +arriving 9410 +indulge 9410 +clockers 9410 +languages 9410 +Antarctica 9410 +percentage 9410 +ceiling 9410 +specification 9410 +regimented 9410 +ciphers 9410 +pictures 9410 +serpents 9410 +allot 9410 +realized 9410 +mayoral 9410 +opaquely 9410 +hostess 9410 +fiftieth 9410 +incorrectly 9410 +decomposition 9410 +stranglings 9410 +mixture 9410 +electroencephalography 9410 +similarities 9410 +charges 9410 +freest 9410 +Greenberg 9410 +tinting 9410 +expelled 9410 +warm 9410 +smoothed 9410 +deductions 9410 +Romano 9410 +bitterroot 9410 +corset 9410 +securing 9410 +environing 9410 +cute 9410 +Crays 9410 +heiress 9410 +inform 9410 +avenge 9410 +universals 9410 +Kinsey 9410 +ravines 9410 +bestseller 9410 +equilibrium 9410 +extents 9410 +relatively 9410 +pressure 9410 +critiques 9410 +befouled 9410 +rightfully 9410 +mechanizing 9410 +Latinizes 9410 +timesharing 9410 +Aden 9410 +embassies 9410 +males 9410 +shapelessly 9410 +mastering 9410 +Newtonian 9410 +finishers 9410 +abates 9410 +teem 9410 +kiting 9410 +stodgy 9410 +feed 9410 +guitars 9410 +airships 9410 +store 9410 +denounces 9410 +Pyle 9410 +Saxony 9410 +serializations 9410 +Peruvian 9410 +taxonomically 9410 +kingdom 9410 +stint 9410 +Sault 9410 +faithful 9410 +Ganymede 9410 +tidiness 9410 +gainful 9410 +contrary 9410 +Tipperary 9410 +tropics 9410 +theorizers 9410 +renew 9410 +already 9410 +terminal 9410 +Hegelian 9410 +hypothesizer 9410 +warningly 9410 +journalizing 9410 +nested 9410 +Lars 9410 +saplings 9410 +foothill 9410 +labeled 9410 +imperiously 9410 +reporters 9410 +furnishings 9410 +precipitable 9410 +discounts 9410 +excises 9410 +Stalin 9410 +despot 9410 +ripeness 9410 +Arabia 9410 +unruly 9410 +mournfulness 9410 +boom 9410 +slaughter 9410 +Sabine 9410 +handy 9410 +rural 9410 +organizer 9410 +shipyard 9410 +civics 9410 +inaccuracy 9410 +rules 9410 +juveniles 9410 +comprised 9410 +investigations 9410 +stabilizes 9410 +seminaries 9410 +Hunter 9410 +sporty 9410 +test 9410 +weasels 9410 +CERN 9410 +tempering 9410 +afore 9410 +Galatean 9410 +techniques 9410 +error 9410 +veranda 9410 +severely 9410 +Cassites 9410 +forthcoming 9410 +guides 9410 +vanish 9410 +lied 9410 +sawtooth 9410 +fated 9410 +gradually 9410 +widens 9410 +preclude 9410 +evenhandedly 9410 +percentage 9410 +disobedience 9410 +humility 9410 +gleaning 9410 +petted 9410 +bloater 9410 +minion 9410 +marginal 9410 +apiary 9410 +measures 9410 +precaution 9410 +repelled 9410 +primary 9410 +coverings 9410 +Artemia 9410 +navigate 9410 +spatial 9410 +Gurkha 9410 +meanwhile 9410 +Melinda 9410 +Butterfield 9410 +Aldrich 9410 +previewing 9410 +glut 9410 +unaffected 9410 +inmate 9410 +mineral 9410 +impending 9410 +meditation 9410 +ideas 9410 +miniaturizes 9410 +lewdly 9410 +title 9410 +youthfulness 9410 +creak 9410 +Chippewa 9410 +clamored 9410 +freezes 9410 +forgivably 9410 +reduce 9410 +McGovern 9410 +Nazis 9410 +epistle 9410 +socializes 9410 +conceptions 9410 +Kevin 9410 +uncovering 9410 +chews 9410 +appendixes 9410 +appendixes 9410 +appendixes 9410 +appendixes 9410 +appendixes 9410 +appendixes 9410 +raining 9410 +infest 9410 +compartment 9410 +minting 9410 +ducks 9410 +roped 9410 +waltz 9410 +Lillian 9410 +repressions 9410 +chillingly 9410 +noncritical 9410 +lithograph 9410 +spongers 9410 +parenthood 9410 +posed 9410 +instruments 9410 +filial 9410 +fixedly 9410 +relives 9410 +Pandora 9410 +watering 9410 +ungrateful 9410 +secures 9410 +poison 9410 +dusted 9410 +encompasses 9410 +presentation 9410 +Kantian 9410 +select fld3,period,price,price2 from t2,t3 where t2.fld1=t3.t2nr and period >= 1001 and period <= 1002 and t2.companynr = 37 order by fld3,period, price; +fld3 period price price2 +admonishing 1002 28357832 8723648 +analyzable 1002 28357832 8723648 +annihilates 1001 5987435 234724 +Antares 1002 28357832 8723648 +astound 1001 5987435 234724 +audiology 1001 5987435 234724 +Augustine 1002 28357832 8723648 +Baird 1002 28357832 8723648 +bewilderingly 1001 5987435 234724 +breaking 1001 5987435 234724 +Conley 1001 5987435 234724 +dentally 1002 28357832 8723648 +dissociate 1002 28357832 8723648 +elite 1001 5987435 234724 +eschew 1001 5987435 234724 +Eulerian 1001 5987435 234724 +flanking 1001 5987435 234724 +foldout 1002 28357832 8723648 +funereal 1002 28357832 8723648 +galling 1002 28357832 8723648 +Graves 1001 5987435 234724 +grazing 1001 5987435 234724 +groupings 1001 5987435 234724 +handgun 1001 5987435 234724 +humility 1002 28357832 8723648 +impulsive 1002 28357832 8723648 +inch 1001 5987435 234724 +intelligibility 1001 5987435 234724 +jarring 1001 5987435 234724 +lawgiver 1001 5987435 234724 +lectured 1002 28357832 8723648 +Merritt 1002 28357832 8723648 +neonatal 1001 5987435 234724 +offload 1002 28357832 8723648 +parters 1002 28357832 8723648 +pityingly 1002 28357832 8723648 +puddings 1002 28357832 8723648 +Punjab 1001 5987435 234724 +quitter 1002 28357832 8723648 +realtor 1001 5987435 234724 +relaxing 1001 5987435 234724 +repetitions 1001 5987435 234724 +resumes 1001 5987435 234724 +Romans 1002 28357832 8723648 +rusting 1001 5987435 234724 +scholastics 1001 5987435 234724 +skulking 1002 28357832 8723648 +stated 1002 28357832 8723648 +suites 1002 28357832 8723648 +sureties 1001 5987435 234724 +testicle 1002 28357832 8723648 +tinily 1002 28357832 8723648 +tragedies 1001 5987435 234724 +trimmings 1001 5987435 234724 +vacuuming 1001 5987435 234724 +ventilate 1001 5987435 234724 +wallet 1001 5987435 234724 +Weissmuller 1002 28357832 8723648 +Wotan 1002 28357832 8723648 +select t2.fld1,fld3,period,price,price2 from t2,t3 where t2.fld1>= 18201 and t2.fld1 <= 18811 and t2.fld1=t3.t2nr and period = 1001 and t2.companynr = 37; +fld1 fld3 period price price2 +018201 relaxing 1001 5987435 234724 +018601 vacuuming 1001 5987435 234724 +018801 inch 1001 5987435 234724 +018811 repetitions 1001 5987435 234724 +create table t4 ( +companynr tinyint(2) unsigned zerofill NOT NULL default '00', +companyname char(30) NOT NULL default '', +PRIMARY KEY (companynr), +UNIQUE KEY companyname(companyname) +) ENGINE=MyISAM MAX_ROWS=50 PACK_KEYS=1 COMMENT='companynames'; +select STRAIGHT_JOIN t2.companynr,companyname from t4,t2 where t2.companynr=t4.companynr group by t2.companynr; +companynr companyname +00 Unknown +29 company 1 +34 company 2 +36 company 3 +37 company 4 +40 company 5 +41 company 6 +50 company 11 +53 company 7 +58 company 8 +65 company 9 +68 company 10 +select SQL_SMALL_RESULT t2.companynr,companyname from t4,t2 where t2.companynr=t4.companynr group by t2.companynr; +companynr companyname +00 Unknown +29 company 1 +34 company 2 +36 company 3 +37 company 4 +40 company 5 +41 company 6 +50 company 11 +53 company 7 +58 company 8 +65 company 9 +68 company 10 +select * from t1,t1 t12; +Period Varor_period Period Varor_period +9410 9412 9410 9412 +select t2.fld1,t22.fld1 from t2,t2 t22 where t2.fld1 >= 250501 and t2.fld1 <= 250505 and t22.fld1 >= 250501 and t22.fld1 <= 250505; +fld1 fld1 +250501 250501 +250502 250501 +250503 250501 +250504 250501 +250505 250501 +250501 250502 +250502 250502 +250503 250502 +250504 250502 +250505 250502 +250501 250503 +250502 250503 +250503 250503 +250504 250503 +250505 250503 +250501 250504 +250502 250504 +250503 250504 +250504 250504 +250505 250504 +250501 250505 +250502 250505 +250503 250505 +250504 250505 +250505 250505 +insert into t2 (fld1, companynr) values (999999,99); +select t2.companynr,companyname from t2 left join t4 using (companynr) where t4.companynr is null; +companynr companyname +99 NULL +select count(*) from t2 left join t4 using (companynr) where t4.companynr is not null; +count(*) +1199 +explain select t2.companynr,companyname from t2 left join t4 using (companynr) where t4.companynr is null; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL 1200 +1 SIMPLE t4 eq_ref PRIMARY PRIMARY 1 test.t2.companynr 1 Using where; Not exists +explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr is null; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 +1 SIMPLE t2 ALL NULL NULL NULL NULL 1200 Using where; Not exists +select companynr,companyname from t2 left join t4 using (companynr) where companynr is null; +companynr companyname +select count(*) from t2 left join t4 using (companynr) where companynr is not null; +count(*) +1200 +explain select companynr,companyname from t2 left join t4 using (companynr) where companynr is null; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +explain select companynr,companyname from t4 left join t2 using (companynr) where companynr is null; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +delete from t2 where fld1=999999; +explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where +1 SIMPLE t4 eq_ref PRIMARY PRIMARY 1 test.t2.companynr 1 +explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 or t2.companynr < 0; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where +1 SIMPLE t4 eq_ref PRIMARY PRIMARY 1 test.t2.companynr 1 +explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 and t4.companynr > 0; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where +1 SIMPLE t4 eq_ref PRIMARY PRIMARY 1 test.t2.companynr 1 +explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 +explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 or companynr < 0; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 +explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 and companynr > 0; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 +explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 or t2.companynr is null; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where +explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 or t2.companynr < 0 or t4.companynr > 0; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where +explain select t2.companynr,companyname from t4 left join t2 using (companynr) where ifnull(t2.companynr,1)>0; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where +explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 or companynr is null; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 +explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 or companynr < 0 or companynr > 0; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 +explain select companynr,companyname from t4 left join t2 using (companynr) where ifnull(companynr,1)>0; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 +select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1; +companynr companynr +37 36 +41 40 +explain select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t4 index NULL PRIMARY 1 NULL 12 Using index; Using temporary +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer +select t2.fld1,t2.companynr,fld3,period from t3,t2 where t2.fld1 = 38208 and t2.fld1=t3.t2nr and period = 1008 or t2.fld1 = 38008 and t2.fld1 =t3.t2nr and period = 1008; +fld1 companynr fld3 period +038008 37 reporters 1008 +038208 37 Selfridge 1008 +select t2.fld1,t2.companynr,fld3,period from t3,t2 where (t2.fld1 = 38208 or t2.fld1 = 38008) and t2.fld1=t3.t2nr and period>=1008 and period<=1009; +fld1 companynr fld3 period +038008 37 reporters 1008 +038208 37 Selfridge 1008 +select t2.fld1,t2.companynr,fld3,period from t3,t2 where (t3.t2nr = 38208 or t3.t2nr = 38008) and t2.fld1=t3.t2nr and period>=1008 and period<=1009; +fld1 companynr fld3 period +038008 37 reporters 1008 +038208 37 Selfridge 1008 +select period from t1 where (((period > 0) or period < 10000 or (period = 1900)) and (period=1900 and period <= 1901) or (period=1903 and (period=1903)) and period>=1902) or ((period=1904 or period=1905) or (period=1906 or period>1907)) or (period=1908 and period = 1909); +period +9410 +select period from t1 where ((period > 0 and period < 1) or (((period > 0 and period < 100) and (period > 10)) or (period > 10)) or (period > 0 and (period > 5 or period > 6))); +period +9410 +select a.fld1 from t2 as a,t2 b where ((a.fld1 = 250501 and a.fld1=b.fld1) or a.fld1=250502 or a.fld1=250503 or (a.fld1=250505 and a.fld1<=b.fld1 and b.fld1>=a.fld1)) and a.fld1=b.fld1; +fld1 +250501 +250502 +250503 +250505 +select fld1 from t2 where fld1 in (250502,98005,98006,250503,250605,250606) and fld1 >=250502 and fld1 not in (250605,250606); +fld1 +250502 +250503 +select fld1 from t2 where fld1 between 250502 and 250504; +fld1 +250502 +250503 +250504 +select fld3 from t2 where (((fld3 like "_%L%" ) or (fld3 like "%ok%")) and ( fld3 like "L%" or fld3 like "G%")) and fld3 like "L%" ; +fld3 +label +labeled +labeled +landslide +laterally +leaflet +lewdly +Lillian +luckily +select count(*) from t1; +count(*) +1 +select companynr,count(*),sum(fld1) from t2 group by companynr; +companynr count(*) sum(fld1) +00 82 10355753 +29 95 14473298 +34 70 17788966 +36 215 22786296 +37 588 83602098 +40 37 6618386 +41 52 12816335 +50 11 1595438 +53 4 793210 +58 23 2254293 +65 10 2284055 +68 12 3097288 +select companynr,count(*) from t2 group by companynr order by companynr desc limit 5; +companynr count(*) +68 12 +65 10 +58 23 +53 4 +50 11 +select count(*),min(fld4),max(fld4),sum(fld1),avg(fld1),std(fld1),variance(fld1) from t2 where companynr = 34 and fld4<>""; +count(*) min(fld4) max(fld4) sum(fld1) avg(fld1) std(fld1) variance(fld1) +70 absentee vest 17788966 254128.0857 3272.5940 10709871.3069 +explain extended select count(*),min(fld4),max(fld4),sum(fld1),avg(fld1),std(fld1),variance(fld1) from t2 where companynr = 34 and fld4<>""; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 100.00 Using where +Warnings: +Note 1003 select count(0) AS `count(*)`,min(`test`.`t2`.`fld4`) AS `min(fld4)`,max(`test`.`t2`.`fld4`) AS `max(fld4)`,sum(`test`.`t2`.`fld1`) AS `sum(fld1)`,avg(`test`.`t2`.`fld1`) AS `avg(fld1)`,std(`test`.`t2`.`fld1`) AS `std(fld1)`,variance(`test`.`t2`.`fld1`) AS `variance(fld1)` from `test`.`t2` where ((`test`.`t2`.`companynr` = 34) and (`test`.`t2`.`fld4` <> '')) +select companynr,count(*),min(fld4),max(fld4),sum(fld1),avg(fld1),std(fld1),variance(fld1) from t2 group by companynr limit 3; +companynr count(*) min(fld4) max(fld4) sum(fld1) avg(fld1) std(fld1) variance(fld1) +00 82 Anthony windmills 10355753 126289.6707 115550.9757 13352027981.7087 +29 95 abut wetness 14473298 152350.5053 8368.5480 70032594.9026 +34 70 absentee vest 17788966 254128.0857 3272.5940 10709871.3069 +select companynr,t2nr,count(price),sum(price),min(price),max(price),avg(price) from t3 where companynr = 37 group by companynr,t2nr limit 10; +companynr t2nr count(price) sum(price) min(price) max(price) avg(price) +37 1 1 5987435 5987435 5987435 5987435.0000 +37 2 1 28357832 28357832 28357832 28357832.0000 +37 3 1 39654943 39654943 39654943 39654943.0000 +37 11 1 5987435 5987435 5987435 5987435.0000 +37 12 1 28357832 28357832 28357832 28357832.0000 +37 13 1 39654943 39654943 39654943 39654943.0000 +37 21 1 5987435 5987435 5987435 5987435.0000 +37 22 1 28357832 28357832 28357832 28357832.0000 +37 23 1 39654943 39654943 39654943 39654943.0000 +37 31 1 5987435 5987435 5987435 5987435.0000 +select /*! SQL_SMALL_RESULT */ companynr,t2nr,count(price),sum(price),min(price),max(price),avg(price) from t3 where companynr = 37 group by companynr,t2nr limit 10; +companynr t2nr count(price) sum(price) min(price) max(price) avg(price) +37 1 1 5987435 5987435 5987435 5987435.0000 +37 2 1 28357832 28357832 28357832 28357832.0000 +37 3 1 39654943 39654943 39654943 39654943.0000 +37 11 1 5987435 5987435 5987435 5987435.0000 +37 12 1 28357832 28357832 28357832 28357832.0000 +37 13 1 39654943 39654943 39654943 39654943.0000 +37 21 1 5987435 5987435 5987435 5987435.0000 +37 22 1 28357832 28357832 28357832 28357832.0000 +37 23 1 39654943 39654943 39654943 39654943.0000 +37 31 1 5987435 5987435 5987435 5987435.0000 +select companynr,count(price),sum(price),min(price),max(price),avg(price) from t3 group by companynr ; +companynr count(price) sum(price) min(price) max(price) avg(price) +37 12543 309394878010 5987435 39654943 24666736.6667 +78 8362 414611089292 726498 98439034 49582766.0000 +101 4181 3489454238 834598 834598 834598.0000 +154 4181 4112197254950 983543950 983543950 983543950.0000 +311 4181 979599938 234298 234298 234298.0000 +447 4181 9929180954 2374834 2374834 2374834.0000 +512 4181 3288532102 786542 786542 786542.0000 +select distinct mod(companynr,10) from t4 group by companynr; +mod(companynr,10) +0 +9 +4 +6 +7 +1 +3 +8 +5 +select distinct 1 from t4 group by companynr; +1 +1 +select count(distinct fld1) from t2; +count(distinct fld1) +1199 +select companynr,count(distinct fld1) from t2 group by companynr; +companynr count(distinct fld1) +00 82 +29 95 +34 70 +36 215 +37 588 +40 37 +41 52 +50 11 +53 4 +58 23 +65 10 +68 12 +select companynr,count(*) from t2 group by companynr; +companynr count(*) +00 82 +29 95 +34 70 +36 215 +37 588 +40 37 +41 52 +50 11 +53 4 +58 23 +65 10 +68 12 +select companynr,count(distinct concat(fld1,repeat(65,1000))) from t2 group by companynr; +companynr count(distinct concat(fld1,repeat(65,1000))) +00 82 +29 95 +34 70 +36 215 +37 588 +40 37 +41 52 +50 11 +53 4 +58 23 +65 10 +68 12 +select companynr,count(distinct concat(fld1,repeat(65,200))) from t2 group by companynr; +companynr count(distinct concat(fld1,repeat(65,200))) +00 82 +29 95 +34 70 +36 215 +37 588 +40 37 +41 52 +50 11 +53 4 +58 23 +65 10 +68 12 +select companynr,count(distinct floor(fld1/100)) from t2 group by companynr; +companynr count(distinct floor(fld1/100)) +00 47 +29 35 +34 14 +36 69 +37 108 +40 16 +41 11 +50 9 +53 1 +58 1 +65 1 +68 1 +select companynr,count(distinct concat(repeat(65,1000),floor(fld1/100))) from t2 group by companynr; +companynr count(distinct concat(repeat(65,1000),floor(fld1/100))) +00 47 +29 35 +34 14 +36 69 +37 108 +40 16 +41 11 +50 9 +53 1 +58 1 +65 1 +68 1 +select sum(fld1),fld3 from t2 where fld3="Romans" group by fld1 limit 10; +sum(fld1) fld3 +11402 Romans +select name,count(*) from t3 where name='cloakroom' group by name; +name count(*) +cloakroom 4181 +select name,count(*) from t3 where name='cloakroom' and price>10 group by name; +name count(*) +cloakroom 4181 +select count(*) from t3 where name='cloakroom' and price2=823742; +count(*) +4181 +select name,count(*) from t3 where name='cloakroom' and price2=823742 group by name; +name count(*) +cloakroom 4181 +select name,count(*) from t3 where name >= "extramarital" and price <= 39654943 group by name; +name count(*) +extramarital 4181 +gazer 4181 +gems 4181 +Iranizes 4181 +spates 4181 +tucked 4181 +violinist 4181 +select t2.fld3,count(*) from t2,t3 where t2.fld1=158402 and t3.name=t2.fld3 group by t3.name; +fld3 count(*) +spates 4181 +select companynr|0,companyname from t4 group by 1; +companynr|0 companyname +0 Unknown +29 company 1 +34 company 2 +36 company 3 +37 company 4 +40 company 5 +41 company 6 +50 company 11 +53 company 7 +58 company 8 +65 company 9 +68 company 10 +select t2.companynr,companyname,count(*) from t2,t4 where t2.companynr=t4.companynr group by t2.companynr order by companyname; +companynr companyname count(*) +29 company 1 95 +68 company 10 12 +50 company 11 11 +34 company 2 70 +36 company 3 215 +37 company 4 588 +40 company 5 37 +41 company 6 52 +53 company 7 4 +58 company 8 23 +65 company 9 10 +00 Unknown 82 +select t2.fld1,count(*) from t2,t3 where t2.fld1=158402 and t3.name=t2.fld3 group by t3.name; +fld1 count(*) +158402 4181 +select sum(Period)/count(*) from t1; +sum(Period)/count(*) +9410.0000 +select companynr,count(price) as "count",sum(price) as "sum" ,abs(sum(price)/count(price)-avg(price)) as "diff",(0+count(price))*companynr as func from t3 group by companynr; +companynr count sum diff func +37 12543 309394878010 0.0000 464091 +78 8362 414611089292 0.0000 652236 +101 4181 3489454238 0.0000 422281 +154 4181 4112197254950 0.0000 643874 +311 4181 979599938 0.0000 1300291 +447 4181 9929180954 0.0000 1868907 +512 4181 3288532102 0.0000 2140672 +select companynr,sum(price)/count(price) as avg from t3 group by companynr having avg > 70000000 order by avg; +companynr avg +154 983543950.0000 +select companynr,count(*) from t2 group by companynr order by 2 desc; +companynr count(*) +37 588 +36 215 +29 95 +00 82 +34 70 +41 52 +40 37 +58 23 +68 12 +50 11 +65 10 +53 4 +select companynr,count(*) from t2 where companynr > 40 group by companynr order by 2 desc; +companynr count(*) +41 52 +58 23 +68 12 +50 11 +65 10 +53 4 +select t2.fld4,t2.fld1,count(price),sum(price),min(price),max(price),avg(price) from t3,t2 where t3.companynr = 37 and t2.fld1 = t3.t2nr group by fld1,t2.fld4; +fld4 fld1 count(price) sum(price) min(price) max(price) avg(price) +teethe 000001 1 5987435 5987435 5987435 5987435.0000 +dreaded 011401 1 5987435 5987435 5987435 5987435.0000 +scholastics 011402 1 28357832 28357832 28357832 28357832.0000 +audiology 011403 1 39654943 39654943 39654943 39654943.0000 +wallet 011501 1 5987435 5987435 5987435 5987435.0000 +parters 011701 1 5987435 5987435 5987435 5987435.0000 +eschew 011702 1 28357832 28357832 28357832 28357832.0000 +quitter 011703 1 39654943 39654943 39654943 39654943.0000 +neat 012001 1 5987435 5987435 5987435 5987435.0000 +Steinberg 012003 1 39654943 39654943 39654943 39654943.0000 +balled 012301 1 5987435 5987435 5987435 5987435.0000 +persist 012302 1 28357832 28357832 28357832 28357832.0000 +attainments 012303 1 39654943 39654943 39654943 39654943.0000 +capably 012501 1 5987435 5987435 5987435 5987435.0000 +impulsive 012602 1 28357832 28357832 28357832 28357832.0000 +starlet 012603 1 39654943 39654943 39654943 39654943.0000 +featherweight 012701 1 5987435 5987435 5987435 5987435.0000 +pessimist 012702 1 28357832 28357832 28357832 28357832.0000 +daughter 012703 1 39654943 39654943 39654943 39654943.0000 +lawgiver 013601 1 5987435 5987435 5987435 5987435.0000 +stated 013602 1 28357832 28357832 28357832 28357832.0000 +readable 013603 1 39654943 39654943 39654943 39654943.0000 +testicle 013801 1 5987435 5987435 5987435 5987435.0000 +Parsifal 013802 1 28357832 28357832 28357832 28357832.0000 +leavings 013803 1 39654943 39654943 39654943 39654943.0000 +squeaking 013901 1 5987435 5987435 5987435 5987435.0000 +contrasted 016001 1 5987435 5987435 5987435 5987435.0000 +leftover 016201 1 5987435 5987435 5987435 5987435.0000 +whiteners 016202 1 28357832 28357832 28357832 28357832.0000 +erases 016301 1 5987435 5987435 5987435 5987435.0000 +Punjab 016302 1 28357832 28357832 28357832 28357832.0000 +Merritt 016303 1 39654943 39654943 39654943 39654943.0000 +sweetish 018001 1 5987435 5987435 5987435 5987435.0000 +dogging 018002 1 28357832 28357832 28357832 28357832.0000 +scornfully 018003 1 39654943 39654943 39654943 39654943.0000 +fetters 018012 1 28357832 28357832 28357832 28357832.0000 +bivalves 018013 1 39654943 39654943 39654943 39654943.0000 +skulking 018021 1 5987435 5987435 5987435 5987435.0000 +flint 018022 1 28357832 28357832 28357832 28357832.0000 +flopping 018023 1 39654943 39654943 39654943 39654943.0000 +Judas 018032 1 28357832 28357832 28357832 28357832.0000 +vacuuming 018033 1 39654943 39654943 39654943 39654943.0000 +medical 018041 1 5987435 5987435 5987435 5987435.0000 +bloodbath 018042 1 28357832 28357832 28357832 28357832.0000 +subschema 018043 1 39654943 39654943 39654943 39654943.0000 +interdependent 018051 1 5987435 5987435 5987435 5987435.0000 +Graves 018052 1 28357832 28357832 28357832 28357832.0000 +neonatal 018053 1 39654943 39654943 39654943 39654943.0000 +sorters 018061 1 5987435 5987435 5987435 5987435.0000 +epistle 018062 1 28357832 28357832 28357832 28357832.0000 +Conley 018101 1 5987435 5987435 5987435 5987435.0000 +lectured 018102 1 28357832 28357832 28357832 28357832.0000 +Abraham 018103 1 39654943 39654943 39654943 39654943.0000 +cage 018201 1 5987435 5987435 5987435 5987435.0000 +hushes 018202 1 28357832 28357832 28357832 28357832.0000 +Simla 018402 1 28357832 28357832 28357832 28357832.0000 +reporters 018403 1 39654943 39654943 39654943 39654943.0000 +coexist 018601 1 5987435 5987435 5987435 5987435.0000 +Beebe 018602 1 28357832 28357832 28357832 28357832.0000 +Taoism 018603 1 39654943 39654943 39654943 39654943.0000 +Connally 018801 1 5987435 5987435 5987435 5987435.0000 +fetched 018802 1 28357832 28357832 28357832 28357832.0000 +checkpoints 018803 1 39654943 39654943 39654943 39654943.0000 +gritty 018811 1 5987435 5987435 5987435 5987435.0000 +firearm 018812 1 28357832 28357832 28357832 28357832.0000 +minima 019101 1 5987435 5987435 5987435 5987435.0000 +Selfridge 019102 1 28357832 28357832 28357832 28357832.0000 +disable 019103 1 39654943 39654943 39654943 39654943.0000 +witchcraft 019201 1 5987435 5987435 5987435 5987435.0000 +betroth 030501 1 5987435 5987435 5987435 5987435.0000 +Manhattanize 030502 1 28357832 28357832 28357832 28357832.0000 +imprint 030503 1 39654943 39654943 39654943 39654943.0000 +swelling 031901 1 5987435 5987435 5987435 5987435.0000 +interrelationships 036001 1 5987435 5987435 5987435 5987435.0000 +riser 036002 1 28357832 28357832 28357832 28357832.0000 +bee 038001 1 5987435 5987435 5987435 5987435.0000 +kanji 038002 1 28357832 28357832 28357832 28357832.0000 +dental 038003 1 39654943 39654943 39654943 39654943.0000 +railway 038011 1 5987435 5987435 5987435 5987435.0000 +validate 038012 1 28357832 28357832 28357832 28357832.0000 +normalizes 038013 1 39654943 39654943 39654943 39654943.0000 +Kline 038101 1 5987435 5987435 5987435 5987435.0000 +Anatole 038102 1 28357832 28357832 28357832 28357832.0000 +partridges 038103 1 39654943 39654943 39654943 39654943.0000 +recruited 038201 1 5987435 5987435 5987435 5987435.0000 +dimensions 038202 1 28357832 28357832 28357832 28357832.0000 +Chicana 038203 1 39654943 39654943 39654943 39654943.0000 +select t3.companynr,fld3,sum(price) from t3,t2 where t2.fld1 = t3.t2nr and t3.companynr = 512 group by companynr,fld3; +companynr fld3 sum(price) +512 boat 786542 +512 capably 786542 +512 cupboard 786542 +512 decliner 786542 +512 descendants 786542 +512 dopers 786542 +512 erases 786542 +512 Micronesia 786542 +512 Miles 786542 +512 skies 786542 +select t2.companynr,count(*),min(fld3),max(fld3),sum(price),avg(price) from t2,t3 where t3.companynr >= 30 and t3.companynr <= 58 and t3.t2nr = t2.fld1 and 1+1=2 group by t2.companynr; +companynr count(*) min(fld3) max(fld3) sum(price) avg(price) +00 1 Omaha Omaha 5987435 5987435.0000 +36 1 dubbed dubbed 28357832 28357832.0000 +37 83 Abraham Wotan 1908978016 22999735.1325 +50 2 scribbled tapestry 68012775 34006387.5000 +select t3.companynr+0,t3.t2nr,fld3,sum(price) from t3,t2 where t2.fld1 = t3.t2nr and t3.companynr = 37 group by 1,t3.t2nr,fld3,fld3,fld3,fld3,fld3 order by fld1; +t3.companynr+0 t2nr fld3 sum(price) +37 1 Omaha 5987435 +37 11401 breaking 5987435 +37 11402 Romans 28357832 +37 11403 intercepted 39654943 +37 11501 bewilderingly 5987435 +37 11701 astound 5987435 +37 11702 admonishing 28357832 +37 11703 sumac 39654943 +37 12001 flanking 5987435 +37 12003 combed 39654943 +37 12301 Eulerian 5987435 +37 12302 dubbed 28357832 +37 12303 Kane 39654943 +37 12501 annihilates 5987435 +37 12602 Wotan 28357832 +37 12603 snatching 39654943 +37 12701 grazing 5987435 +37 12702 Baird 28357832 +37 12703 celery 39654943 +37 13601 handgun 5987435 +37 13602 foldout 28357832 +37 13603 mystic 39654943 +37 13801 intelligibility 5987435 +37 13802 Augustine 28357832 +37 13803 teethe 39654943 +37 13901 scholastics 5987435 +37 16001 audiology 5987435 +37 16201 wallet 5987435 +37 16202 parters 28357832 +37 16301 eschew 5987435 +37 16302 quitter 28357832 +37 16303 neat 39654943 +37 18001 jarring 5987435 +37 18002 tinily 28357832 +37 18003 balled 39654943 +37 18012 impulsive 28357832 +37 18013 starlet 39654943 +37 18021 lawgiver 5987435 +37 18022 stated 28357832 +37 18023 readable 39654943 +37 18032 testicle 28357832 +37 18033 Parsifal 39654943 +37 18041 Punjab 5987435 +37 18042 Merritt 28357832 +37 18043 Quixotism 39654943 +37 18051 sureties 5987435 +37 18052 puddings 28357832 +37 18053 tapestry 39654943 +37 18061 trimmings 5987435 +37 18062 humility 28357832 +37 18101 tragedies 5987435 +37 18102 skulking 28357832 +37 18103 flint 39654943 +37 18201 relaxing 5987435 +37 18202 offload 28357832 +37 18402 suites 28357832 +37 18403 lists 39654943 +37 18601 vacuuming 5987435 +37 18602 dentally 28357832 +37 18603 humanness 39654943 +37 18801 inch 5987435 +37 18802 Weissmuller 28357832 +37 18803 irresponsibly 39654943 +37 18811 repetitions 5987435 +37 18812 Antares 28357832 +37 19101 ventilate 5987435 +37 19102 pityingly 28357832 +37 19103 interdependent 39654943 +37 19201 Graves 5987435 +37 30501 neonatal 5987435 +37 30502 scribbled 28357832 +37 30503 chafe 39654943 +37 31901 realtor 5987435 +37 36001 elite 5987435 +37 36002 funereal 28357832 +37 38001 Conley 5987435 +37 38002 lectured 28357832 +37 38003 Abraham 39654943 +37 38011 groupings 5987435 +37 38012 dissociate 28357832 +37 38013 coexist 39654943 +37 38101 rusting 5987435 +37 38102 galling 28357832 +37 38103 obliterates 39654943 +37 38201 resumes 5987435 +37 38202 analyzable 28357832 +37 38203 terminator 39654943 +select sum(price) from t3,t2 where t2.fld1 = t3.t2nr and t3.companynr = 512 and t3.t2nr = 38008 and t2.fld1 = 38008 or t2.fld1= t3.t2nr and t3.t2nr = 38008 and t2.fld1 = 38008; +sum(price) +234298 +select t2.fld1,sum(price) from t3,t2 where t2.fld1 = t3.t2nr and t3.companynr = 512 and t3.t2nr = 38008 and t2.fld1 = 38008 or t2.fld1 = t3.t2nr and t3.t2nr = 38008 and t2.fld1 = 38008 or t3.t2nr = t2.fld1 and t2.fld1 = 38008 group by t2.fld1; +fld1 sum(price) +038008 234298 +explain select fld3 from t2 where 1>2 or 2>3; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +explain select fld3 from t2 where fld1=fld1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 +select companynr,fld1 from t2 HAVING fld1=250501 or fld1=250502; +companynr fld1 +34 250501 +34 250502 +select companynr,fld1 from t2 WHERE fld1>=250501 HAVING fld1<=250502; +companynr fld1 +34 250501 +34 250502 +select companynr,count(*) as count,sum(fld1) as sum from t2 group by companynr having count > 40 and sum/count >= 120000; +companynr count sum +00 82 10355753 +29 95 14473298 +34 70 17788966 +37 588 83602098 +41 52 12816335 +select companynr from t2 group by companynr having count(*) > 40 and sum(fld1)/count(*) >= 120000 ; +companynr +00 +29 +34 +37 +41 +select t2.companynr,companyname,count(*) from t2,t4 where t2.companynr=t4.companynr group by companyname having t2.companynr >= 40; +companynr companyname count(*) +68 company 10 12 +50 company 11 11 +40 company 5 37 +41 company 6 52 +53 company 7 4 +58 company 8 23 +65 company 9 10 +select count(*) from t2; +count(*) +1199 +select count(*) from t2 where fld1 < 098024; +count(*) +387 +select min(fld1) from t2 where fld1>= 098024; +min(fld1) +98024 +select max(fld1) from t2 where fld1>= 098024; +max(fld1) +1232609 +select count(*) from t3 where price2=76234234; +count(*) +4181 +select count(*) from t3 where companynr=512 and price2=76234234; +count(*) +4181 +explain select min(fld1),max(fld1),count(*) from t2; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away +select min(fld1),max(fld1),count(*) from t2; +min(fld1) max(fld1) count(*) +0 1232609 1199 +select min(t2nr),max(t2nr) from t3 where t2nr=2115 and price2=823742; +min(t2nr) max(t2nr) +2115 2115 +select count(*),min(t2nr),max(t2nr) from t3 where name='spates' and companynr=78; +count(*) min(t2nr) max(t2nr) +4181 4 41804 +select t2nr,count(*) from t3 where name='gems' group by t2nr limit 20; +t2nr count(*) +9 1 +19 1 +29 1 +39 1 +49 1 +59 1 +69 1 +79 1 +89 1 +99 1 +109 1 +119 1 +129 1 +139 1 +149 1 +159 1 +169 1 +179 1 +189 1 +199 1 +select max(t2nr) from t3 where price=983543950; +max(t2nr) +41807 +select t1.period from t3 = t1 limit 1; +period +1001 +select t1.period from t1 as t1 limit 1; +period +9410 +select t1.period as "Nuvarande period" from t1 as t1 limit 1; +Nuvarande period +9410 +select period as ok_period from t1 limit 1; +ok_period +9410 +select period as ok_period from t1 group by ok_period limit 1; +ok_period +9410 +select 1+1 as summa from t1 group by summa limit 1; +summa +2 +select period as "Nuvarande period" from t1 group by "Nuvarande period" limit 1; +Nuvarande period +9410 +show tables; +Tables_in_test +t1 +t2 +t3 +t4 +show tables from test like "s%"; +Tables_in_test (s%) +show tables from test like "t?"; +Tables_in_test (t?) +show full columns from t2; +Field Type Collation Null Key Default Extra Privileges Comment +auto int(11) NULL NO PRI NULL auto_increment # +fld1 int(6) unsigned zerofill NULL NO UNI 000000 # +companynr tinyint(2) unsigned zerofill NULL NO 00 # +fld3 char(30) latin1_swedish_ci NO MUL # +fld4 char(35) latin1_swedish_ci NO # +fld5 char(35) latin1_swedish_ci NO # +fld6 char(4) latin1_swedish_ci NO # +show full columns from t2 from test like 'f%'; +Field Type Collation Null Key Default Extra Privileges Comment +fld1 int(6) unsigned zerofill NULL NO UNI 000000 # +fld3 char(30) latin1_swedish_ci NO MUL # +fld4 char(35) latin1_swedish_ci NO # +fld5 char(35) latin1_swedish_ci NO # +fld6 char(4) latin1_swedish_ci NO # +show full columns from t2 from test like 's%'; +Field Type Collation Null Key Default Extra Privileges Comment +show keys from t2; +Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment +t2 0 PRIMARY 1 auto A 1199 NULL NULL BTREE +t2 0 fld1 1 fld1 A 1199 NULL NULL BTREE +t2 1 fld3 1 fld3 A NULL NULL NULL BTREE +drop table t4, t3, t2, t1; +DO 1; +DO benchmark(100,1+1),1,1; +do default; +ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1 +do foobar; +ERROR 42S22: Unknown column 'foobar' in 'field list' +CREATE TABLE t1 ( +id mediumint(8) unsigned NOT NULL auto_increment, +pseudo varchar(35) NOT NULL default '', +PRIMARY KEY (id), +UNIQUE KEY pseudo (pseudo) +); +INSERT INTO t1 (pseudo) VALUES ('test'); +INSERT INTO t1 (pseudo) VALUES ('test1'); +SELECT 1 as rnd1 from t1 where rand() > 2; +rnd1 +DROP TABLE t1; +CREATE TABLE t1 (gvid int(10) unsigned default NULL, hmid int(10) unsigned default NULL, volid int(10) unsigned default NULL, mmid int(10) unsigned default NULL, hdid int(10) unsigned default NULL, fsid int(10) unsigned default NULL, ctid int(10) unsigned default NULL, dtid int(10) unsigned default NULL, cost int(10) unsigned default NULL, performance int(10) unsigned default NULL, serialnumber bigint(20) unsigned default NULL, monitored tinyint(3) unsigned default '1', removed tinyint(3) unsigned default '0', target tinyint(3) unsigned default '0', dt_modified timestamp NOT NULL, name varchar(255) binary default NULL, description varchar(255) default NULL, UNIQUE KEY hmid (hmid,volid)) ENGINE=MyISAM; +INSERT INTO t1 VALUES (200001,2,1,1,100,1,1,1,0,0,0,1,0,1,20020425060057,'\\\\ARKIVIO-TESTPDC\\E$',''),(200002,2,2,1,101,1,1,1,0,0,0,1,0,1,20020425060057,'\\\\ARKIVIO-TESTPDC\\C$',''),(200003,1,3,2,NULL,NULL,NULL,NULL,NULL,NULL,NULL,1,0,1,20020425060427,'c:',NULL); +CREATE TABLE t2 ( hmid int(10) unsigned default NULL, volid int(10) unsigned default NULL, sampletid smallint(5) unsigned default NULL, sampletime datetime default NULL, samplevalue bigint(20) unsigned default NULL, KEY idx1 (hmid,volid,sampletid,sampletime)) ENGINE=MyISAM; +INSERT INTO t2 VALUES (1,3,10,'2002-06-01 08:00:00',35),(1,3,1010,'2002-06-01 12:00:01',35); +SELECT a.gvid, (SUM(CASE b.sampletid WHEN 140 THEN b.samplevalue ELSE 0 END)) as the_success,(SUM(CASE b.sampletid WHEN 141 THEN b.samplevalue ELSE 0 END)) as the_fail,(SUM(CASE b.sampletid WHEN 142 THEN b.samplevalue ELSE 0 END)) as the_size,(SUM(CASE b.sampletid WHEN 143 THEN b.samplevalue ELSE 0 END)) as the_time FROM t1 a, t2 b WHERE a.hmid = b.hmid AND a.volid = b.volid AND b.sampletime >= 'wrong-date-value' AND b.sampletime < 'wrong-date-value' AND b.sampletid IN (140, 141, 142, 143) GROUP BY a.gvid; +gvid the_success the_fail the_size the_time +Warnings: +Warning 1292 Incorrect datetime value: 'wrong-date-value' for column 'sampletime' at row 1 +Warning 1292 Incorrect datetime value: 'wrong-date-value' for column 'sampletime' at row 1 +SELECT a.gvid, (SUM(CASE b.sampletid WHEN 140 THEN b.samplevalue ELSE 0 END)) as the_success,(SUM(CASE b.sampletid WHEN 141 THEN b.samplevalue ELSE 0 END)) as the_fail,(SUM(CASE b.sampletid WHEN 142 THEN b.samplevalue ELSE 0 END)) as the_size,(SUM(CASE b.sampletid WHEN 143 THEN b.samplevalue ELSE 0 END)) as the_time FROM t1 a, t2 b WHERE a.hmid = b.hmid AND a.volid = b.volid AND b.sampletime >= NULL AND b.sampletime < NULL AND b.sampletid IN (140, 141, 142, 143) GROUP BY a.gvid; +gvid the_success the_fail the_size the_time +DROP TABLE t1,t2; +create table t1 ( A_Id bigint(20) NOT NULL default '0', A_UpdateBy char(10) NOT NULL default '', A_UpdateDate bigint(20) NOT NULL default '0', A_UpdateSerial int(11) NOT NULL default '0', other_types bigint(20) NOT NULL default '0', wss_type bigint(20) NOT NULL default '0'); +INSERT INTO t1 VALUES (102935998719055004,'brade',1029359987,2,102935229116544068,102935229216544093); +select wss_type from t1 where wss_type ='102935229216544106'; +wss_type +select wss_type from t1 where wss_type ='102935229216544105'; +wss_type +select wss_type from t1 where wss_type ='102935229216544104'; +wss_type +select wss_type from t1 where wss_type ='102935229216544093'; +wss_type +102935229216544093 +select wss_type from t1 where wss_type =102935229216544093; +wss_type +102935229216544093 +drop table t1; +select 1+2,"aaaa",3.13*2.0 into @a,@b,@c; +select @a; +@a +3 +select @b; +@b +aaaa +select @c; +@c +6.260 +create table t1 (a int not null auto_increment primary key); +insert into t1 values (); +insert into t1 values (); +insert into t1 values (); +select * from (t1 as t2 left join t1 as t3 using (a)), t1; +a a +1 1 +2 1 +3 1 +1 2 +2 2 +3 2 +1 3 +2 3 +3 3 +select * from t1, (t1 as t2 left join t1 as t3 using (a)); +a a +1 1 +2 1 +3 1 +1 2 +2 2 +3 2 +1 3 +2 3 +3 3 +select * from (t1 as t2 left join t1 as t3 using (a)) straight_join t1; +a a +1 1 +2 1 +3 1 +1 2 +2 2 +3 2 +1 3 +2 3 +3 3 +select * from t1 straight_join (t1 as t2 left join t1 as t3 using (a)); +a a +1 1 +2 1 +3 1 +1 2 +2 2 +3 2 +1 3 +2 3 +3 3 +select * from (t1 as t2 left join t1 as t3 using (a)) inner join t1 on t1.a>1; +a a +1 2 +2 2 +3 2 +1 3 +2 3 +3 3 +select * from t1 inner join (t1 as t2 left join t1 as t3 using (a)) on t1.a>1; +a a +2 1 +3 1 +2 2 +3 2 +2 3 +3 3 +select * from (t1 as t2 left join t1 as t3 using (a)) inner join t1 using ( a ); +a +1 +2 +3 +select * from t1 inner join (t1 as t2 left join t1 as t3 using (a)) using ( a ); +a +1 +2 +3 +select * from (t1 as t2 left join t1 as t3 using (a)) left outer join t1 on t1.a>1; +a a +1 2 +1 3 +2 2 +2 3 +3 2 +3 3 +select * from t1 left outer join (t1 as t2 left join t1 as t3 using (a)) on t1.a>1; +a a +1 NULL +2 1 +2 2 +2 3 +3 1 +3 2 +3 3 +select * from (t1 as t2 left join t1 as t3 using (a)) left join t1 using ( a ); +a +1 +2 +3 +select * from t1 left join (t1 as t2 left join t1 as t3 using (a)) using ( a ); +a +1 +2 +3 +select * from (t1 as t2 left join t1 as t3 using (a)) natural left join t1; +a +1 +2 +3 +select * from t1 natural left join (t1 as t2 left join t1 as t3 using (a)); +a +1 +2 +3 +select * from (t1 as t2 left join t1 as t3 using (a)) right join t1 on t1.a>1; +a a +NULL 1 +1 2 +2 2 +3 2 +1 3 +2 3 +3 3 +select * from t1 right join (t1 as t2 left join t1 as t3 using (a)) on t1.a>1; +a a +2 1 +3 1 +2 2 +3 2 +2 3 +3 3 +select * from (t1 as t2 left join t1 as t3 using (a)) right outer join t1 using ( a ); +a +1 +2 +3 +select * from t1 right outer join (t1 as t2 left join t1 as t3 using (a)) using ( a ); +a +1 +2 +3 +select * from (t1 as t2 left join t1 as t3 using (a)) natural right join t1; +a +1 +2 +3 +select * from t1 natural right join (t1 as t2 left join t1 as t3 using (a)); +a +1 +2 +3 +select * from t1 natural join (t1 as t2 left join t1 as t3 using (a)); +a +1 +2 +3 +select * from (t1 as t2 left join t1 as t3 using (a)) natural join t1; +a +1 +2 +3 +drop table t1; +CREATE TABLE t1 ( aa char(2), id int(11) NOT NULL auto_increment, t2_id int(11) NOT NULL default '0', PRIMARY KEY (id), KEY replace_id (t2_id)) ENGINE=MyISAM; +INSERT INTO t1 VALUES ("1",8264,2506),("2",8299,2517),("3",8301,2518),("4",8302,2519),("5",8303,2520),("6",8304,2521),("7",8305,2522); +CREATE TABLE t2 ( id int(11) NOT NULL auto_increment, PRIMARY KEY (id)) ENGINE=MyISAM; +INSERT INTO t2 VALUES (2517), (2518), (2519), (2520), (2521), (2522); +select * from t1, t2 WHERE t1.t2_id = t2.id and t1.t2_id > 0 order by t1.id LIMIT 0, 5; +aa id t2_id id +2 8299 2517 2517 +3 8301 2518 2518 +4 8302 2519 2519 +5 8303 2520 2520 +6 8304 2521 2521 +drop table t1,t2; +create table t1 (id1 int NOT NULL); +create table t2 (id2 int NOT NULL); +create table t3 (id3 int NOT NULL); +create table t4 (id4 int NOT NULL, id44 int NOT NULL, KEY (id4)); +insert into t1 values (1); +insert into t1 values (2); +insert into t2 values (1); +insert into t4 values (1,1); +explain select * from t1 left join t2 on id1 = id2 left join t3 on id1 = id3 +left join t4 on id3 = id4 where id2 = 1 or id4 = 1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t3 system NULL NULL NULL NULL 0 const row not found +1 SIMPLE t4 const id4 NULL NULL NULL 1 +1 SIMPLE t1 ALL NULL NULL NULL NULL 2 +1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where +select * from t1 left join t2 on id1 = id2 left join t3 on id1 = id3 +left join t4 on id3 = id4 where id2 = 1 or id4 = 1; +id1 id2 id3 id4 id44 +1 1 NULL NULL NULL +drop table t1,t2,t3,t4; +create table t1(s varchar(10) not null); +create table t2(s varchar(10) not null primary key); +create table t3(s varchar(10) not null primary key); +insert into t1 values ('one\t'), ('two\t'); +insert into t2 values ('one\r'), ('two\t'); +insert into t3 values ('one '), ('two\t'); +select * from t1 where s = 'one'; +s +select * from t2 where s = 'one'; +s +select * from t3 where s = 'one'; +s +one +select * from t1,t2 where t1.s = t2.s; +s s +two two +select * from t2,t3 where t2.s = t3.s; +s s +two two +drop table t1, t2, t3; +create table t1 (a integer, b integer, index(a), index(b)); +create table t2 (c integer, d integer, index(c), index(d)); +insert into t1 values (1,2), (2,2), (3,2), (4,2); +insert into t2 values (1,3), (2,3), (3,4), (4,4); +explain select * from t1 left join t2 on a=c where d in (4); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ref c,d d 5 const 2 Using where +1 SIMPLE t1 ALL a NULL NULL NULL 4 Using where; Using join buffer +select * from t1 left join t2 on a=c where d in (4); +a b c d +3 2 3 4 +4 2 4 4 +explain select * from t1 left join t2 on a=c where d = 4; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ref c,d d 5 const 2 Using where +1 SIMPLE t1 ALL a NULL NULL NULL 4 Using where; Using join buffer +select * from t1 left join t2 on a=c where d = 4; +a b c d +3 2 3 4 +4 2 4 4 +drop table t1, t2; +CREATE TABLE t1 ( +i int(11) NOT NULL default '0', +c char(10) NOT NULL default '', +PRIMARY KEY (i), +UNIQUE KEY c (c) +) ENGINE=MyISAM; +INSERT INTO t1 VALUES (1,'a'); +INSERT INTO t1 VALUES (2,'b'); +INSERT INTO t1 VALUES (3,'c'); +EXPLAIN SELECT i FROM t1 WHERE i=1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 Using index +DROP TABLE t1; +CREATE TABLE t1 ( a BLOB, INDEX (a(20)) ); +CREATE TABLE t2 ( a BLOB, INDEX (a(20)) ); +INSERT INTO t1 VALUES ('one'),('two'),('three'),('four'),('five'); +INSERT INTO t2 VALUES ('one'),('two'),('three'),('four'),('five'); +EXPLAIN SELECT * FROM t1 LEFT JOIN t2 USE INDEX (a) ON t1.a=t2.a; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 5 +1 SIMPLE t2 ref a a 23 test.t1.a 2 +EXPLAIN SELECT * FROM t1 LEFT JOIN t2 FORCE INDEX (a) ON t1.a=t2.a; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 5 +1 SIMPLE t2 ref a a 23 test.t1.a 2 +DROP TABLE t1, t2; +CREATE TABLE t1 ( city char(30) ); +INSERT INTO t1 VALUES ('London'); +INSERT INTO t1 VALUES ('Paris'); +SELECT * FROM t1 WHERE city='London'; +city +London +SELECT * FROM t1 WHERE city='london'; +city +London +EXPLAIN SELECT * FROM t1 WHERE city='London' AND city='london'; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where +SELECT * FROM t1 WHERE city='London' AND city='london'; +city +London +EXPLAIN SELECT * FROM t1 WHERE city LIKE '%london%' AND city='London'; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where +SELECT * FROM t1 WHERE city LIKE '%london%' AND city='London'; +city +London +DROP TABLE t1; +create table t1 (a int(11) unsigned, b int(11) unsigned); +insert into t1 values (1,0), (1,1), (1,2); +select a-b from t1 order by 1; +a-b +0 +1 +18446744073709551615 +select a-b , (a-b < 0) from t1 order by 1; +a-b (a-b < 0) +0 0 +1 0 +18446744073709551615 0 +select a-b as d, (a-b >= 0), b from t1 group by b having d >= 0; +d (a-b >= 0) b +1 1 0 +0 1 1 +18446744073709551615 1 2 +select cast((a - b) as unsigned) from t1 order by 1; +cast((a - b) as unsigned) +0 +1 +18446744073709551615 +drop table t1; +create table t1 (a int(11)); +select all all * from t1; +a +select distinct distinct * from t1; +a +select all distinct * from t1; +ERROR HY000: Incorrect usage of ALL and DISTINCT +select distinct all * from t1; +ERROR HY000: Incorrect usage of ALL and DISTINCT +drop table t1; +CREATE TABLE t1 ( +kunde_intern_id int(10) unsigned NOT NULL default '0', +kunde_id int(10) unsigned NOT NULL default '0', +FK_firma_id int(10) unsigned NOT NULL default '0', +aktuell enum('Ja','Nein') NOT NULL default 'Ja', +vorname varchar(128) NOT NULL default '', +nachname varchar(128) NOT NULL default '', +geloescht enum('Ja','Nein') NOT NULL default 'Nein', +firma varchar(128) NOT NULL default '' +); +INSERT INTO t1 VALUES +(3964,3051,1,'Ja','Vorname1','1Nachname','Nein','Print Schau XXXX'), +(3965,3051111,1,'Ja','Vorname1111','1111Nachname','Nein','Print Schau XXXX'); +SELECT kunde_id ,FK_firma_id ,aktuell, vorname, nachname, geloescht FROM t1 +WHERE +( +( +( '' != '' AND firma LIKE CONCAT('%', '', '%')) +OR +(vorname LIKE CONCAT('%', 'Vorname1', '%') AND +nachname LIKE CONCAT('%', '1Nachname', '%') AND +'Vorname1' != '' AND 'xxxx' != '') +) +AND +( +aktuell = 'Ja' AND geloescht = 'Nein' AND FK_firma_id = 2 +) +) +; +kunde_id FK_firma_id aktuell vorname nachname geloescht +SELECT kunde_id ,FK_firma_id ,aktuell, vorname, nachname, +geloescht FROM t1 +WHERE +( +( +aktuell = 'Ja' AND geloescht = 'Nein' AND FK_firma_id = 2 +) +AND +( +( '' != '' AND firma LIKE CONCAT('%', '', '%') ) +OR +( vorname LIKE CONCAT('%', 'Vorname1', '%') AND +nachname LIKE CONCAT('%', '1Nachname', '%') AND 'Vorname1' != '' AND +'xxxx' != '') +) +) +; +kunde_id FK_firma_id aktuell vorname nachname geloescht +SELECT COUNT(*) FROM t1 WHERE +( 0 OR (vorname LIKE '%Vorname1%' AND nachname LIKE '%1Nachname%' AND 1)) +AND FK_firma_id = 2; +COUNT(*) +0 +drop table t1; +CREATE TABLE t1 (b BIGINT(20) UNSIGNED NOT NULL, PRIMARY KEY (b)); +INSERT INTO t1 VALUES (0x8000000000000000); +SELECT b FROM t1 WHERE b=0x8000000000000000; +b +9223372036854775808 +DROP TABLE t1; +CREATE TABLE `t1` ( `gid` int(11) default NULL, `uid` int(11) default NULL); +CREATE TABLE `t2` ( `ident` int(11) default NULL, `level` char(16) default NULL); +INSERT INTO `t2` VALUES (0,'READ'); +CREATE TABLE `t3` ( `id` int(11) default NULL, `name` char(16) default NULL); +INSERT INTO `t3` VALUES (1,'fs'); +select * from t3 left join t1 on t3.id = t1.uid, t2 where t2.ident in (0, t1.gid, t3.id, 0); +id name gid uid ident level +1 fs NULL NULL 0 READ +drop table t1,t2,t3; +CREATE TABLE t1 ( +acct_id int(11) NOT NULL default '0', +profile_id smallint(6) default NULL, +UNIQUE KEY t1$acct_id (acct_id), +KEY t1$profile_id (profile_id) +); +INSERT INTO t1 VALUES (132,17),(133,18); +CREATE TABLE t2 ( +profile_id smallint(6) default NULL, +queue_id int(11) default NULL, +seq int(11) default NULL, +KEY t2$queue_id (queue_id) +); +INSERT INTO t2 VALUES (17,31,4),(17,30,3),(17,36,2),(17,37,1); +CREATE TABLE t3 ( +id int(11) NOT NULL default '0', +qtype int(11) default NULL, +seq int(11) default NULL, +warn_lvl int(11) default NULL, +crit_lvl int(11) default NULL, +rr1 tinyint(4) NOT NULL default '0', +rr2 int(11) default NULL, +default_queue tinyint(4) NOT NULL default '0', +KEY t3$qtype (qtype), +KEY t3$id (id) +); +INSERT INTO t3 VALUES (30,1,29,NULL,NULL,0,NULL,0),(31,1,28,NULL,NULL,0,NULL,0), +(36,1,34,NULL,NULL,0,NULL,0),(37,1,35,NULL,NULL,0,121,0); +SELECT COUNT(*) FROM t1 a STRAIGHT_JOIN t2 pq STRAIGHT_JOIN t3 q +WHERE +(pq.profile_id = a.profile_id) AND (a.acct_id = 132) AND +(pq.queue_id = q.id) AND (q.rr1 <> 1); +COUNT(*) +4 +drop table t1,t2,t3; +create table t1 (f1 int); +insert into t1 values (1),(NULL); +create table t2 (f2 int, f3 int, f4 int); +create index idx1 on t2 (f4); +insert into t2 values (1,2,3),(2,4,6); +select A.f2 from t1 left join t2 A on A.f2 = f1 where A.f3=(select min(f3) +from t2 C where A.f4 = C.f4) or A.f3 IS NULL; +f2 +1 +NULL +drop table t1,t2; +create table t2 (a tinyint unsigned); +create index t2i on t2(a); +insert into t2 values (0), (254), (255); +explain select * from t2 where a > -1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 index t2i t2i 2 NULL 3 Using where; Using index +select * from t2 where a > -1; +a +0 +254 +255 +drop table t2; +CREATE TABLE t1 (a int, b int, c int); +INSERT INTO t1 +SELECT 50, 3, 3 FROM DUAL +WHERE NOT EXISTS +(SELECT * FROM t1 WHERE a = 50 AND b = 3); +SELECT * FROM t1; +a b c +50 3 3 +INSERT INTO t1 +SELECT 50, 3, 3 FROM DUAL +WHERE NOT EXISTS +(SELECT * FROM t1 WHERE a = 50 AND b = 3); +select found_rows(); +found_rows() +0 +SELECT * FROM t1; +a b c +50 3 3 +select count(*) from t1; +count(*) +1 +select found_rows(); +found_rows() +1 +select count(*) from t1 limit 2,3; +count(*) +select found_rows(); +found_rows() +0 +select SQL_CALC_FOUND_ROWS count(*) from t1 limit 2,3; +count(*) +select found_rows(); +found_rows() +1 +DROP TABLE t1; +CREATE TABLE t1 (a INT, b INT); +(SELECT a, b AS c FROM t1) ORDER BY c+1; +a c +(SELECT a, b AS c FROM t1) ORDER BY b+1; +a c +SELECT a, b AS c FROM t1 ORDER BY c+1; +a c +SELECT a, b AS c FROM t1 ORDER BY b+1; +a c +drop table t1; +create table t1(f1 int, f2 int); +create table t2(f3 int); +select f1 from t1,t2 where f1=f2 and (f1,f2) = ((1,1)); +f1 +select f1 from t1,t2 where f1=f2 and (f1,NULL) = ((1,1)); +f1 +select f1 from t1,t2 where f1=f2 and (f1,f2) = ((1,NULL)); +f1 +insert into t1 values(1,1),(2,null); +insert into t2 values(2); +select * from t1,t2 where f1=f3 and (f1,f2) = (2,null); +f1 f2 f3 +select * from t1,t2 where f1=f3 and (f1,f2) <=> (2,null); +f1 f2 f3 +2 NULL 2 +drop table t1,t2; +create table t1 (f1 int not null auto_increment primary key, f2 varchar(10)); +create table t11 like t1; +insert into t1 values(1,""),(2,""); +show table status like 't1%'; +Name Engine Version Row_format Rows Avg_row_length Data_length Max_data_length Index_length Data_free Auto_increment Create_time Update_time Check_time Collation Checksum Create_options Comment +t1 MyISAM 10 Dynamic 2 20 X X X X X X X X latin1_swedish_ci NULL +t11 MyISAM 10 Dynamic 0 0 X X X X X X X X latin1_swedish_ci NULL +select 123 as a from t1 where f1 is null; +a +drop table t1,t11; +CREATE TABLE t1 ( a INT NOT NULL, b INT NOT NULL, UNIQUE idx (a,b) ); +INSERT INTO t1 VALUES (1,1),(1,2),(1,3),(1,4); +CREATE TABLE t2 ( a INT NOT NULL, b INT NOT NULL, e INT ); +INSERT INTO t2 VALUES ( 1,10,1), (1,10,2), (1,11,1), (1,11,2), (1,2,1), (1,2,2),(1,2,3); +SELECT t2.a, t2.b, IF(t1.b IS NULL,'',e) AS c, COUNT(*) AS d FROM t2 LEFT JOIN +t1 ON t2.a = t1.a AND t2.b = t1.b GROUP BY a, b, c; +a b c d +1 2 1 1 +1 2 2 1 +1 2 3 1 +1 10 2 +1 11 2 +SELECT t2.a, t2.b, IF(t1.b IS NULL,'',e) AS c, COUNT(*) AS d FROM t2 LEFT JOIN +t1 ON t2.a = t1.a AND t2.b = t1.b GROUP BY t1.a, t1.b, c; +a b c d +1 10 4 +1 2 1 1 +1 2 2 1 +1 2 3 1 +SELECT t2.a, t2.b, IF(t1.b IS NULL,'',e) AS c, COUNT(*) AS d FROM t2 LEFT JOIN +t1 ON t2.a = t1.a AND t2.b = t1.b GROUP BY t2.a, t2.b, c; +a b c d +1 2 1 1 +1 2 2 1 +1 2 3 1 +1 10 2 +1 11 2 +SELECT t2.a, t2.b, IF(t1.b IS NULL,'',e) AS c, COUNT(*) AS d FROM t2,t1 +WHERE t2.a = t1.a AND t2.b = t1.b GROUP BY a, b, c; +a b c d +1 2 1 1 +1 2 2 1 +1 2 3 1 +DROP TABLE IF EXISTS t1, t2; +create table t1 (f1 int primary key, f2 int); +create table t2 (f3 int, f4 int, primary key(f3,f4)); +insert into t1 values (1,1); +insert into t2 values (1,1),(1,2); +select distinct count(f2) >0 from t1 left join t2 on f1=f3 group by f1; +count(f2) >0 +1 +drop table t1,t2; +create table t1 (f1 int,f2 int); +insert into t1 values(1,1); +create table t2 (f3 int, f4 int, primary key(f3,f4)); +insert into t2 values(1,1); +select * from t1 where f1 in (select f3 from t2 where (f3,f4)= (select f3,f4 from t2)); +f1 f2 +1 1 +drop table t1,t2; +CREATE TABLE t1(a int, b int, c int, KEY b(b), KEY c(c)); +insert into t1 values (1,0,0),(2,0,0); +CREATE TABLE t2 (a int, b varchar(2), c varchar(2), PRIMARY KEY(a)); +insert into t2 values (1,'',''), (2,'',''); +CREATE TABLE t3 (a int, b int, PRIMARY KEY (a,b), KEY a (a), KEY b (b)); +insert into t3 values (1,1),(1,2); +explain select straight_join DISTINCT t2.a,t2.b, t1.c from t1, t3, t2 +where (t1.c=t2.a or (t1.c=t3.a and t2.a=t3.b)) and t1.b=556476786 and +t2.b like '%%' order by t2.b limit 0,1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref b,c b 5 const 1 Using where; Using temporary; Using filesort +1 SIMPLE t3 index PRIMARY,a,b PRIMARY 8 NULL 2 Using index; Using join buffer +1 SIMPLE t2 ALL PRIMARY NULL NULL NULL 2 Range checked for each record (index map: 0x1) +DROP TABLE t1,t2,t3; +CREATE TABLE t1 (a int, INDEX idx(a)); +INSERT INTO t1 VALUES (2), (3), (1); +EXPLAIN SELECT * FROM t1 IGNORE INDEX (idx); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 +EXPLAIN SELECT * FROM t1 IGNORE INDEX (a); +ERROR 42000: Key 'a' doesn't exist in table 't1' +EXPLAIN SELECT * FROM t1 FORCE INDEX (a); +ERROR 42000: Key 'a' doesn't exist in table 't1' +DROP TABLE t1; +CREATE TABLE t1 (a int, b int); +INSERT INTO t1 VALUES (1,1), (2,1), (4,10); +CREATE TABLE t2 (a int PRIMARY KEY, b int, KEY b (b)); +INSERT INTO t2 VALUES (1,NULL), (2,10); +ALTER TABLE t1 ENABLE KEYS; +EXPLAIN SELECT STRAIGHT_JOIN SQL_NO_CACHE COUNT(*) FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 index b b 5 NULL 2 Using index +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer +SELECT STRAIGHT_JOIN SQL_NO_CACHE * FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL; +a b a b +1 NULL 1 1 +1 NULL 2 1 +1 NULL 4 10 +2 10 4 10 +EXPLAIN SELECT STRAIGHT_JOIN SQL_NO_CACHE COUNT(*) FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 index b b 5 NULL 2 Using index +1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer +SELECT STRAIGHT_JOIN SQL_NO_CACHE * FROM t2, t1 WHERE t1.b = t2.b OR t2.b IS NULL; +a b a b +1 NULL 1 1 +1 NULL 2 1 +1 NULL 4 10 +2 10 4 10 +DROP TABLE IF EXISTS t1,t2; +CREATE TABLE t1 (key1 float default NULL, UNIQUE KEY key1 (key1)); +CREATE TABLE t2 (key2 float default NULL, UNIQUE KEY key2 (key2)); +INSERT INTO t1 VALUES (0.3762),(0.3845),(0.6158),(0.7941); +INSERT INTO t2 VALUES (1.3762),(1.3845),(1.6158),(1.7941); +explain select max(key1) from t1 where key1 <= 0.6158; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away +explain select max(key2) from t2 where key2 <= 1.6158; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away +explain select min(key1) from t1 where key1 >= 0.3762; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away +explain select min(key2) from t2 where key2 >= 1.3762; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away +explain select max(key1), min(key2) from t1, t2 +where key1 <= 0.6158 and key2 >= 1.3762; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away +explain select max(key1) from t1 where key1 <= 0.6158 and rand() + 0.5 >= 0.5; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away +explain select min(key1) from t1 where key1 >= 0.3762 and rand() + 0.5 >= 0.5; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away +select max(key1) from t1 where key1 <= 0.6158; +max(key1) +0.615800023078918 +select max(key2) from t2 where key2 <= 1.6158; +max(key2) +1.61580002307892 +select min(key1) from t1 where key1 >= 0.3762; +min(key1) +0.376199990510941 +select min(key2) from t2 where key2 >= 1.3762; +min(key2) +1.37619996070862 +select max(key1), min(key2) from t1, t2 +where key1 <= 0.6158 and key2 >= 1.3762; +max(key1) min(key2) +0.615800023078918 1.37619996070862 +select max(key1) from t1 where key1 <= 0.6158 and rand() + 0.5 >= 0.5; +max(key1) +0.615800023078918 +select min(key1) from t1 where key1 >= 0.3762 and rand() + 0.5 >= 0.5; +min(key1) +0.376199990510941 +DROP TABLE t1,t2; +CREATE TABLE t1 (i BIGINT UNSIGNED NOT NULL); +INSERT INTO t1 VALUES (10); +SELECT i='1e+01',i=1e+01, i in (1e+01,1e+01), i in ('1e+01','1e+01') FROM t1; +i='1e+01' i=1e+01 i in (1e+01,1e+01) i in ('1e+01','1e+01') +1 1 1 1 +DROP TABLE t1; +create table t1(a bigint unsigned, b bigint); +insert into t1 values (0xfffffffffffffffff, 0xfffffffffffffffff), +(0x10000000000000000, 0x10000000000000000), +(0x8fffffffffffffff, 0x8fffffffffffffff); +Warnings: +Warning 1264 Out of range value for column 'a' at row 1 +Warning 1264 Out of range value for column 'b' at row 1 +Warning 1264 Out of range value for column 'a' at row 2 +Warning 1264 Out of range value for column 'b' at row 2 +Warning 1264 Out of range value for column 'b' at row 3 +select hex(a), hex(b) from t1; +hex(a) hex(b) +FFFFFFFFFFFFFFFF 7FFFFFFFFFFFFFFF +FFFFFFFFFFFFFFFF 7FFFFFFFFFFFFFFF +8FFFFFFFFFFFFFFF 7FFFFFFFFFFFFFFF +drop table t1; +CREATE TABLE t1 (c0 int); +CREATE TABLE t2 (c0 int); +INSERT INTO t1 VALUES(@@connect_timeout); +INSERT INTO t2 VALUES(@@connect_timeout); +SELECT * FROM t1 JOIN t2 ON t1.c0 = t2.c0 WHERE (t1.c0 <=> @@connect_timeout); +c0 c0 +X X +DROP TABLE t1, t2; +End of 4.1 tests +CREATE TABLE t1 ( +K2C4 varchar(4) character set latin1 collate latin1_bin NOT NULL default '', +K4N4 varchar(4) character set latin1 collate latin1_bin NOT NULL default '0000', +F2I4 int(11) NOT NULL default '0' +) ENGINE=MyISAM DEFAULT CHARSET=latin1; +INSERT INTO t1 VALUES +('W%RT', '0100', 1), +('W-RT', '0100', 1), +('WART', '0100', 1), +('WART', '0200', 1), +('WERT', '0100', 2), +('WORT','0200', 2), +('WT', '0100', 2), +('W_RT', '0100', 2), +('WaRT', '0100', 3), +('WART', '0300', 3), +('WRT' , '0400', 3), +('WURM', '0500', 3), +('W%T', '0600', 4), +('WA%T', '0700', 4), +('WA_T', '0800', 4); +SELECT K2C4, K4N4, F2I4 FROM t1 +WHERE K2C4 = 'WART' AND +(F2I4 = 2 AND K2C4 = 'WART' OR (F2I4 = 2 OR K4N4 = '0200')); +K2C4 K4N4 F2I4 +WART 0200 1 +SELECT K2C4, K4N4, F2I4 FROM t1 +WHERE K2C4 = 'WART' AND (K2C4 = 'WART' OR K4N4 = '0200'); +K2C4 K4N4 F2I4 +WART 0100 1 +WART 0200 1 +WART 0300 3 +DROP TABLE t1; +create table t1 (a int, b int); +create table t2 like t1; +select t1.a from (t1 inner join t2 on t1.a=t2.a) where t2.a=1; +a +select t1.a from ((t1 inner join t2 on t1.a=t2.a)) where t2.a=1; +a +select x.a, y.a, z.a from ( (t1 x inner join t2 y on x.a=y.a) inner join t2 z on y.a=z.a) WHERE x.a=1; +a a a +drop table t1,t2; +create table t1 (s1 varchar(5)); +insert into t1 values ('Wall'); +select min(s1) from t1 group by s1 with rollup; +min(s1) +Wall +Wall +drop table t1; +create table t1 (s1 int) engine=myisam; +insert into t1 values (0); +select avg(distinct s1) from t1 group by s1 with rollup; +avg(distinct s1) +0.0000 +0.0000 +drop table t1; +create table t1 (s1 int); +insert into t1 values (null),(1); +select distinct avg(s1) as x from t1 group by s1 with rollup; +x +NULL +1.0000 +drop table t1; +CREATE TABLE t1 (a int); +CREATE TABLE t2 (a int); +INSERT INTO t1 VALUES (1), (2), (3), (4), (5); +INSERT INTO t2 VALUES (2), (4), (6); +SELECT t1.a FROM t1 STRAIGHT_JOIN t2 ON t1.a=t2.a; +a +2 +4 +EXPLAIN SELECT t1.a FROM t1 STRAIGHT_JOIN t2 ON t1.a=t2.a; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 5 +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer +EXPLAIN SELECT t1.a FROM t1 INNER JOIN t2 ON t1.a=t2.a; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL 3 +1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer +DROP TABLE t1,t2; +select x'10' + 0, X'10' + 0, b'10' + 0, B'10' + 0; +x'10' + 0 X'10' + 0 b'10' + 0 B'10' + 0 +16 16 2 2 +create table t1 (f1 varchar(6) default NULL, f2 int(6) primary key not null); +create table t2 (f3 varchar(5) not null, f4 varchar(5) not null, UNIQUE KEY UKEY (f3,f4)); +insert into t1 values (" 2", 2); +insert into t2 values (" 2", " one "),(" 2", " two "); +select * from t1 left join t2 on f1 = f3; +f1 f2 f3 f4 + 2 2 2 one + 2 2 2 two +drop table t1,t2; +create table t1 (empnum smallint, grp int); +create table t2 (empnum int, name char(5)); +insert into t1 values(1,1); +insert into t2 values(1,'bob'); +create view v1 as select * from t2 inner join t1 using (empnum); +select * from v1; +empnum name grp +1 bob 1 +drop table t1,t2; +drop view v1; +create table t1 (pk int primary key, b int); +create table t2 (pk int primary key, c int); +select pk from t1 inner join t2 using (pk); +pk +drop table t1,t2; +create table t1 (s1 int, s2 char(5), s3 decimal(10)); +create view v1 as select s1, s2, 'x' as s3 from t1; +select * from t1 natural join v1; +s1 s2 s3 +insert into t1 values (1,'x',5); +select * from t1 natural join v1; +s1 s2 s3 +Warnings: +Warning 1292 Truncated incorrect DOUBLE value: 'x' +drop table t1; +drop view v1; +create table t1(a1 int); +create table t2(a2 int); +insert into t1 values(1),(2); +insert into t2 values(1),(2); +create view v2 (c) as select a1 from t1; +select * from t1 natural left join t2; +a1 a2 +1 1 +1 2 +2 1 +2 2 +select * from t1 natural right join t2; +a2 a1 +1 1 +1 2 +2 1 +2 2 +select * from v2 natural left join t2; +c a2 +1 1 +1 2 +2 1 +2 2 +select * from v2 natural right join t2; +a2 c +1 1 +1 2 +2 1 +2 2 +drop table t1, t2; +drop view v2; +create table t1 (a int(10), t1_val int(10)); +create table t2 (b int(10), t2_val int(10)); +create table t3 (a int(10), b int(10)); +insert into t1 values (1,1),(2,2); +insert into t2 values (1,1),(2,2),(3,3); +insert into t3 values (1,1),(2,1),(3,1),(4,1); +select * from t1 natural join t2 natural join t3; +a b t1_val t2_val +1 1 1 1 +2 1 2 1 +select * from t1 natural join t3 natural join t2; +b a t1_val t2_val +1 1 1 1 +1 2 2 1 +drop table t1, t2, t3; +DO IFNULL(NULL, NULL); +SELECT CAST(IFNULL(NULL, NULL) AS DECIMAL); +CAST(IFNULL(NULL, NULL) AS DECIMAL) +NULL +SELECT ABS(IFNULL(NULL, NULL)); +ABS(IFNULL(NULL, NULL)) +NULL +SELECT IFNULL(NULL, NULL); +IFNULL(NULL, NULL) +NULL +SET @OLD_SQL_MODE12595=@@SQL_MODE, @@SQL_MODE=''; +SHOW LOCAL VARIABLES LIKE 'SQL_MODE'; +Variable_name Value +sql_mode +CREATE TABLE BUG_12595(a varchar(100)); +INSERT INTO BUG_12595 VALUES ('hakan%'), ('hakank'), ("ha%an"); +SELECT * FROM BUG_12595 WHERE a LIKE 'hakan\%'; +a +hakan% +SELECT * FROM BUG_12595 WHERE a LIKE 'hakan*%' ESCAPE '*'; +a +hakan% +SELECT * FROM BUG_12595 WHERE a LIKE 'hakan**%' ESCAPE '**'; +ERROR HY000: Incorrect arguments to ESCAPE +SELECT * FROM BUG_12595 WHERE a LIKE 'hakan%' ESCAPE ''; +a +hakan% +hakank +SELECT * FROM BUG_12595 WHERE a LIKE 'hakan\%' ESCAPE ''; +a +SELECT * FROM BUG_12595 WHERE a LIKE 'ha\%an' ESCAPE 0x5c; +a +ha%an +SELECT * FROM BUG_12595 WHERE a LIKE 'ha%%an' ESCAPE '%'; +a +ha%an +SELECT * FROM BUG_12595 WHERE a LIKE 'ha\%an' ESCAPE '\\'; +a +ha%an +SELECT * FROM BUG_12595 WHERE a LIKE 'ha|%an' ESCAPE '|'; +a +ha%an +SET @@SQL_MODE='NO_BACKSLASH_ESCAPES'; +SHOW LOCAL VARIABLES LIKE 'SQL_MODE'; +Variable_name Value +sql_mode NO_BACKSLASH_ESCAPES +SELECT * FROM BUG_12595 WHERE a LIKE 'hakan\%'; +a +SELECT * FROM BUG_12595 WHERE a LIKE 'hakan*%' ESCAPE '*'; +a +hakan% +SELECT * FROM BUG_12595 WHERE a LIKE 'hakan**%' ESCAPE '**'; +ERROR HY000: Incorrect arguments to ESCAPE +SELECT * FROM BUG_12595 WHERE a LIKE 'hakan\%' ESCAPE '\\'; +ERROR HY000: Incorrect arguments to ESCAPE +SELECT * FROM BUG_12595 WHERE a LIKE 'hakan%' ESCAPE ''; +ERROR HY000: Incorrect arguments to ESCAPE +SELECT * FROM BUG_12595 WHERE a LIKE 'ha\%an' ESCAPE 0x5c; +a +ha%an +SELECT * FROM BUG_12595 WHERE a LIKE 'ha|%an' ESCAPE '|'; +a +ha%an +SELECT * FROM BUG_12595 WHERE a LIKE 'hakan\n%' ESCAPE '\n'; +ERROR HY000: Incorrect arguments to ESCAPE +SET @@SQL_MODE=@OLD_SQL_MODE12595; +DROP TABLE BUG_12595; +create table t1 (a char(1)); +create table t2 (a char(1)); +insert into t1 values ('a'),('b'),('c'); +insert into t2 values ('b'),('c'),('d'); +select a from t1 natural join t2; +a +b +c +select * from t1 natural join t2 where a = 'b'; +a +b +drop table t1, t2; +CREATE TABLE t1 (`id` TINYINT); +CREATE TABLE t2 (`id` TINYINT); +CREATE TABLE t3 (`id` TINYINT); +INSERT INTO t1 VALUES (1),(2),(3); +INSERT INTO t2 VALUES (2); +INSERT INTO t3 VALUES (3); +SELECT t1.id,t3.id FROM t1 JOIN t2 ON (t2.id=t1.id) LEFT JOIN t3 USING (id); +ERROR 23000: Column 'id' in from clause is ambiguous +SELECT t1.id,t3.id FROM t1 JOIN t2 ON (t2.notacolumn=t1.id) LEFT JOIN t3 USING (id); +ERROR 23000: Column 'id' in from clause is ambiguous +SELECT id,t3.id FROM t1 JOIN t2 ON (t2.id=t1.id) LEFT JOIN t3 USING (id); +ERROR 23000: Column 'id' in from clause is ambiguous +SELECT id,t3.id FROM (t1 JOIN t2 ON (t2.id=t1.id)) LEFT JOIN t3 USING (id); +ERROR 23000: Column 'id' in from clause is ambiguous +drop table t1, t2, t3; +create table t1 (a int(10),b int(10)); +create table t2 (a int(10),b int(10)); +insert into t1 values (1,10),(2,20),(3,30); +insert into t2 values (1,10); +select * from t1 inner join t2 using (A); +a b b +1 10 10 +select * from t1 inner join t2 using (a); +a b b +1 10 10 +drop table t1, t2; +create table t1 (a int, c int); +create table t2 (b int); +create table t3 (b int, a int); +create table t4 (c int); +insert into t1 values (1,1); +insert into t2 values (1); +insert into t3 values (1,1); +insert into t4 values (1); +select * from t1 join t2 join t3 on (t2.b = t3.b and t1.a = t3.a); +a c b b a +1 1 1 1 1 +select * from t1, t2 join t3 on (t2.b = t3.b and t1.a = t3.a); +ERROR 42S22: Unknown column 't1.a' in 'on clause' +select * from t1 join t2 join t3 join t4 on (t1.a = t4.c and t2.b = t4.c); +a c b b a c +1 1 1 1 1 1 +select * from t1 join t2 join t4 using (c); +c a b +1 1 1 +drop table t1, t2, t3, t4; +create table t1(x int, y int); +create table t2(x int, y int); +create table t3(x int, primary key(x)); +insert into t1 values (1, 1), (2, 1), (3, 1), (4, 3), (5, 6), (6, 6); +insert into t2 values (1, 1), (2, 1), (3, 3), (4, 6), (5, 6); +insert into t3 values (1), (2), (3), (4), (5); +select t1.x, t3.x from t1, t2, t3 where t1.x = t2.x and t3.x >= t1.y and t3.x <= t2.y; +x x +1 1 +2 1 +3 1 +3 2 +3 3 +4 3 +4 4 +4 5 +drop table t1,t2,t3; +create table t1 (id char(16) not null default '', primary key (id)); +insert into t1 values ('100'),('101'),('102'); +create table t2 (id char(16) default null); +insert into t2 values (1); +create view v1 as select t1.id from t1; +create view v2 as select t2.id from t2; +create view v3 as select (t1.id+2) as id from t1 natural left join t2; +select t1.id from t1 left join v2 using (id); +id +100 +101 +102 +select t1.id from v2 right join t1 using (id); +id +100 +101 +102 +select t1.id from t1 left join v3 using (id); +id +100 +101 +102 +select * from t1 left join v2 using (id); +id +100 +101 +102 +select * from v2 right join t1 using (id); +id +100 +101 +102 +select * from t1 left join v3 using (id); +id +100 +101 +102 +select v1.id from v1 left join v2 using (id); +id +100 +101 +102 +select v1.id from v2 right join v1 using (id); +id +100 +101 +102 +select v1.id from v1 left join v3 using (id); +id +100 +101 +102 +select * from v1 left join v2 using (id); +id +100 +101 +102 +select * from v2 right join v1 using (id); +id +100 +101 +102 +select * from v1 left join v3 using (id); +id +100 +101 +102 +drop table t1, t2; +drop view v1, v2, v3; +create table t1 (id int(11) not null default '0'); +insert into t1 values (123),(191),(192); +create table t2 (id char(16) character set utf8 not null); +insert into t2 values ('58013'),('58014'),('58015'),('58016'); +create table t3 (a_id int(11) not null, b_id char(16) character set utf8); +insert into t3 values (123,null),(123,null),(123,null),(123,null),(123,null),(123,'58013'); +select count(*) +from t1 inner join (t3 left join t2 on t2.id = t3.b_id) on t1.id = t3.a_id; +count(*) +6 +select count(*) +from t1 inner join (t2 right join t3 on t2.id = t3.b_id) on t1.id = t3.a_id; +count(*) +6 +drop table t1,t2,t3; +create table t1 (a int); +create table t2 (b int); +create table t3 (c int); +select * from t1 join t2 join t3 on (t1.a=t3.c); +a b c +select * from t1 join t2 left join t3 on (t1.a=t3.c); +a b c +select * from t1 join t2 right join t3 on (t1.a=t3.c); +a b c +select * from t1 join t2 straight_join t3 on (t1.a=t3.c); +a b c +drop table t1, t2 ,t3; +create table t1(f1 int, f2 date); +insert into t1 values(1,'2005-01-01'),(2,'2005-09-01'),(3,'2005-09-30'), +(4,'2005-10-01'),(5,'2005-12-30'); +select * from t1 where f2 >= 0 order by f2; +f1 f2 +1 2005-01-01 +2 2005-09-01 +3 2005-09-30 +4 2005-10-01 +5 2005-12-30 +select * from t1 where f2 >= '0000-00-00' order by f2; +f1 f2 +1 2005-01-01 +2 2005-09-01 +3 2005-09-30 +4 2005-10-01 +5 2005-12-30 +select * from t1 where f2 >= '2005-09-31' order by f2; +f1 f2 +4 2005-10-01 +5 2005-12-30 +select * from t1 where f2 >= '2005-09-3a' order by f2; +f1 f2 +3 2005-09-30 +4 2005-10-01 +5 2005-12-30 +Warnings: +Warning 1292 Incorrect date value: '2005-09-3a' for column 'f2' at row 1 +select * from t1 where f2 <= '2005-09-31' order by f2; +f1 f2 +1 2005-01-01 +2 2005-09-01 +3 2005-09-30 +select * from t1 where f2 <= '2005-09-3a' order by f2; +f1 f2 +1 2005-01-01 +2 2005-09-01 +Warnings: +Warning 1292 Incorrect date value: '2005-09-3a' for column 'f2' at row 1 +drop table t1; +create table t1 (f1 int, f2 int); +insert into t1 values (1, 30), (2, 20), (3, 10); +create algorithm=merge view v1 as select f1, f2 from t1; +create algorithm=merge view v2 (f2, f1) as select f1, f2 from t1; +create algorithm=merge view v3 as select t1.f1 as f2, t1.f2 as f1 from t1; +select t1.f1 as x1, f1 from t1 order by t1.f1; +x1 f1 +1 1 +2 2 +3 3 +select v1.f1 as x1, f1 from v1 order by v1.f1; +x1 f1 +1 1 +2 2 +3 3 +select v2.f1 as x1, f1 from v2 order by v2.f1; +x1 f1 +10 10 +20 20 +30 30 +select v3.f1 as x1, f1 from v3 order by v3.f1; +x1 f1 +10 10 +20 20 +30 30 +select f1, f2, v1.f1 as x1 from v1 order by v1.f1; +f1 f2 x1 +1 30 1 +2 20 2 +3 10 3 +select f1, f2, v2.f1 as x1 from v2 order by v2.f1; +f1 f2 x1 +10 3 10 +20 2 20 +30 1 30 +select f1, f2, v3.f1 as x1 from v3 order by v3.f1; +f1 f2 x1 +10 3 10 +20 2 20 +30 1 30 +drop table t1; +drop view v1, v2, v3; +CREATE TABLE t1(key_a int4 NOT NULL, optimus varchar(32), PRIMARY KEY(key_a)); +CREATE TABLE t2(key_a int4 NOT NULL, prime varchar(32), PRIMARY KEY(key_a)); +CREATE table t3(key_a int4 NOT NULL, key_b int4 NOT NULL, foo varchar(32), +PRIMARY KEY(key_a,key_b)); +INSERT INTO t1 VALUES (0,''); +INSERT INTO t1 VALUES (1,'i'); +INSERT INTO t1 VALUES (2,'j'); +INSERT INTO t1 VALUES (3,'k'); +INSERT INTO t2 VALUES (1,'r'); +INSERT INTO t2 VALUES (2,'s'); +INSERT INTO t2 VALUES (3,'t'); +INSERT INTO t3 VALUES (1,5,'x'); +INSERT INTO t3 VALUES (1,6,'y'); +INSERT INTO t3 VALUES (2,5,'xx'); +INSERT INTO t3 VALUES (2,6,'yy'); +INSERT INTO t3 VALUES (2,7,'zz'); +INSERT INTO t3 VALUES (3,5,'xxx'); +SELECT t2.key_a,foo +FROM t1 INNER JOIN t2 ON t1.key_a = t2.key_a +INNER JOIN t3 ON t1.key_a = t3.key_a +WHERE t2.key_a=2 and key_b=5; +key_a foo +2 xx +EXPLAIN SELECT t2.key_a,foo +FROM t1 INNER JOIN t2 ON t1.key_a = t2.key_a +INNER JOIN t3 ON t1.key_a = t3.key_a +WHERE t2.key_a=2 and key_b=5; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 Using index +1 SIMPLE t2 const PRIMARY PRIMARY 4 const 1 Using index +1 SIMPLE t3 const PRIMARY PRIMARY 8 const,const 1 +SELECT t2.key_a,foo +FROM t1 INNER JOIN t2 ON t2.key_a = t1.key_a +INNER JOIN t3 ON t1.key_a = t3.key_a +WHERE t2.key_a=2 and key_b=5; +key_a foo +2 xx +EXPLAIN SELECT t2.key_a,foo +FROM t1 INNER JOIN t2 ON t2.key_a = t1.key_a +INNER JOIN t3 ON t1.key_a = t3.key_a +WHERE t2.key_a=2 and key_b=5; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 Using index +1 SIMPLE t2 const PRIMARY PRIMARY 4 const 1 Using index +1 SIMPLE t3 const PRIMARY PRIMARY 8 const,const 1 +DROP TABLE t1,t2,t3; +create table t1 (f1 int); +insert into t1 values(1),(2); +create table t2 (f2 int, f3 int, key(f2)); +insert into t2 values(1,1),(2,2); +create table t3 (f4 int not null); +insert into t3 values (2),(2),(2); +select f1,(select count(*) from t2,t3 where f2=f1 and f3=f4) as count from t1; +f1 count +1 0 +2 3 +drop table t1,t2,t3; +create table t1 (f1 int unique); +create table t2 (f2 int unique); +create table t3 (f3 int unique); +insert into t1 values(1),(2); +insert into t2 values(1),(2); +insert into t3 values(1),(NULL); +select * from t3 where f3 is null; +f3 +NULL +select t2.f2 from t1 left join t2 on f1=f2 join t3 on f1=f3 where f1=1; +f2 +1 +drop table t1,t2,t3; +create table t1(f1 char, f2 char not null); +insert into t1 values(null,'a'); +create table t2 (f2 char not null); +insert into t2 values('b'); +select * from t1 left join t2 on f1=t2.f2 where t1.f2='a'; +f1 f2 f2 +NULL a NULL +drop table t1,t2; +select * from (select * left join t on f1=f2) tt; +ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'on f1=f2) tt' at line 1 +CREATE TABLE t1 (sku int PRIMARY KEY, pr int); +CREATE TABLE t2 (sku int PRIMARY KEY, sppr int, name varchar(255)); +INSERT INTO t1 VALUES +(10, 10), (20, 10), (30, 20), (40, 30), (50, 10), (60, 10); +INSERT INTO t2 VALUES +(10, 10, 'aaa'), (20, 10, 'bbb'), (30, 10, 'ccc'), (40, 20, 'ddd'), +(50, 10, 'eee'), (60, 20, 'fff'), (70, 20, 'ggg'), (80, 30, 'hhh'); +SELECT t2.sku, t2.sppr, t2.name, t1.sku, t1.pr +FROM t2, t1 WHERE t2.sku=20 AND (t2.sku=t1.sku OR t2.sppr=t1.sku); +sku sppr name sku pr +20 10 bbb 10 10 +20 10 bbb 20 10 +EXPLAIN +SELECT t2.sku, t2.sppr, t2.name, t1.sku, t1.pr +FROM t2, t1 WHERE t2.sku=20 AND (t2.sku=t1.sku OR t2.sppr=t1.sku); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 const PRIMARY PRIMARY 4 const 1 +1 SIMPLE t1 range PRIMARY PRIMARY 4 NULL 2 Using where +DROP TABLE t1,t2; +CREATE TABLE t1 (i TINYINT UNSIGNED NOT NULL); +INSERT t1 SET i = 0; +UPDATE t1 SET i = -1; +Warnings: +Warning 1264 Out of range value for column 'i' at row 1 +SELECT * FROM t1; +i +0 +UPDATE t1 SET i = CAST(i - 1 AS SIGNED); +Warnings: +Warning 1264 Out of range value for column 'i' at row 1 +SELECT * FROM t1; +i +0 +UPDATE t1 SET i = i - 1; +Warnings: +Warning 1264 Out of range value for column 'i' at row 1 +SELECT * FROM t1; +i +255 +DROP TABLE t1; +create table t1 (a int); +insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); +create table t2 (a int, b int, c int, e int, primary key(a,b,c)); +insert into t2 select A.a, B.a, C.a, C.a from t1 A, t1 B, t1 C; +analyze table t2; +Table Op Msg_type Msg_text +test.t2 analyze status OK +select 'In next EXPLAIN, B.rows must be exactly 10:' Z; +Z +In next EXPLAIN, B.rows must be exactly 10: +explain select * from t2 A, t2 B where A.a=5 and A.b=5 and A.C<5 +and B.a=5 and B.b=A.e and (B.b =1 or B.b = 3 or B.b=5); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE A range PRIMARY PRIMARY 12 NULL 4 Using where +1 SIMPLE B ref PRIMARY PRIMARY 8 const,test.A.e 10 +drop table t1, t2; +CREATE TABLE t1 (a int PRIMARY KEY, b int, INDEX(b)); +INSERT INTO t1 VALUES (1, 3), (9,4), (7,5), (4,5), (6,2), +(3,1), (5,1), (8,9), (2,2), (0,9); +CREATE TABLE t2 (c int, d int, f int, INDEX(c,f)); +INSERT INTO t2 VALUES +(1,0,0), (1,0,1), (2,0,0), (2,0,1), (3,0,0), (4,0,1), +(5,0,0), (5,0,1), (6,0,0), (0,0,1), (7,0,0), (7,0,1), +(0,0,0), (0,0,1), (8,0,0), (8,0,1), (9,0,0), (9,0,1); +EXPLAIN +SELECT a, c, d, f FROM t1,t2 WHERE a=c AND b BETWEEN 4 AND 6; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 range PRIMARY,b b 5 NULL 3 Using where +1 SIMPLE t2 ref c c 5 test.t1.a 2 Using where +EXPLAIN +SELECT a, c, d, f FROM t1,t2 WHERE a=c AND b BETWEEN 4 AND 6 AND a > 0; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 range PRIMARY,b b 5 NULL 3 Using where +1 SIMPLE t2 ref c c 5 test.t1.a 2 Using where +DROP TABLE t1, t2; +create table t1 ( +a int unsigned not null auto_increment primary key, +b bit not null, +c bit not null +); +create table t2 ( +a int unsigned not null auto_increment primary key, +b bit not null, +c int unsigned not null, +d varchar(50) +); +insert into t1 (b,c) values (0,1), (0,1); +insert into t2 (b,c) values (0,1); +select t1.a, t1.b + 0, t1.c + 0, t2.a, t2.b + 0, t2.c, t2.d +from t1 left outer join t2 on t1.a = t2.c and t2.b <> 1 +where t1.b <> 1 order by t1.a; +a t1.b + 0 t1.c + 0 a t2.b + 0 c d +1 0 1 1 0 1 NULL +2 0 1 NULL NULL NULL NULL +drop table t1,t2; +SELECT 0.9888889889 * 1.011111411911; +0.9888889889 * 1.011111411911 +0.9998769417899202067879 +prepare stmt from 'select 1 as " a "'; +Warnings: +Warning 1466 Leading spaces are removed from name ' a ' +execute stmt; +a +1 +CREATE TABLE t1 (a int NOT NULL PRIMARY KEY, b int NOT NULL); +INSERT INTO t1 VALUES (1,1), (2,2), (3,3), (4,4); +CREATE TABLE t2 (c int NOT NULL, INDEX idx(c)); +INSERT INTO t2 VALUES +(1), (1), (1), (1), (1), (1), (1), (1), +(2), (2), (2), (2), +(3), (3), +(4); +EXPLAIN SELECT b FROM t1, t2 WHERE b=c AND a=1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 +1 SIMPLE t2 ref idx idx 4 const 7 Using index +EXPLAIN SELECT b FROM t1, t2 WHERE b=c AND a=4; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 +1 SIMPLE t2 ref idx idx 4 const 1 Using index +DROP TABLE t1, t2; +CREATE TABLE t1 (id int NOT NULL PRIMARY KEY, a int); +INSERT INTO t1 VALUES (1,2), (2,NULL), (3,2); +CREATE TABLE t2 (b int, c INT, INDEX idx1(b)); +INSERT INTO t2 VALUES (2,1), (3,2); +CREATE TABLE t3 (d int, e int, INDEX idx1(d)); +INSERT INTO t3 VALUES (2,10), (2,20), (1,30), (2,40), (2,50); +EXPLAIN +SELECT * FROM t1 LEFT JOIN t2 ON t2.b=t1.a INNER JOIN t3 ON t3.d=t1.id +WHERE t1.id=2; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 +1 SIMPLE t2 const idx1 NULL NULL NULL 1 +1 SIMPLE t3 ref idx1 idx1 5 const 3 Using where +SELECT * FROM t1 LEFT JOIN t2 ON t2.b=t1.a INNER JOIN t3 ON t3.d=t1.id +WHERE t1.id=2; +id a b c d e +2 NULL NULL NULL 2 10 +2 NULL NULL NULL 2 20 +2 NULL NULL NULL 2 40 +2 NULL NULL NULL 2 50 +DROP TABLE t1,t2,t3; +create table t1 (c1 varchar(1), c2 int, c3 int, c4 int, c5 int, c6 int, +c7 int, c8 int, c9 int, fulltext key (`c1`)); +select distinct match (`c1`) against ('z') , c2, c3, c4,c5, c6,c7, c8 +from t1 where c9=1 order by c2, c2; +match (`c1`) against ('z') c2 c3 c4 c5 c6 c7 c8 +drop table t1; +CREATE TABLE t1 (pk varchar(10) PRIMARY KEY, fk varchar(16)); +CREATE TABLE t2 (pk varchar(16) PRIMARY KEY, fk varchar(10)); +INSERT INTO t1 VALUES +('d','dddd'), ('i','iii'), ('a','aa'), ('b','bb'), ('g','gg'), +('e','eee'), ('c','cccc'), ('h','hhh'), ('j','jjj'), ('f','fff'); +INSERT INTO t2 VALUES +('jjj', 'j'), ('cc','c'), ('ccc','c'), ('aaa', 'a'), ('jjjj','j'), +('hhh','h'), ('gg','g'), ('fff','f'), ('ee','e'), ('ffff','f'), +('bbb','b'), ('ff','f'), ('cccc','c'), ('dddd','d'), ('jj','j'), +('aaaa','a'), ('bb','b'), ('eeee','e'), ('aa','a'), ('hh','h'); +EXPLAIN SELECT t2.* +FROM t1 JOIN t2 ON t2.fk=t1.pk +WHERE t2.fk < 'c' AND t2.pk=t1.fk; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 range PRIMARY PRIMARY 12 NULL 3 Using where +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 18 test.t1.fk 1 Using where +EXPLAIN SELECT t2.* +FROM t1 JOIN t2 ON t2.fk=t1.pk +WHERE t2.fk BETWEEN 'a' AND 'b' AND t2.pk=t1.fk; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 range PRIMARY PRIMARY 12 NULL 2 Using where +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 18 test.t1.fk 1 Using where +EXPLAIN SELECT t2.* +FROM t1 JOIN t2 ON t2.fk=t1.pk +WHERE t2.fk IN ('a','b') AND t2.pk=t1.fk; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 range PRIMARY PRIMARY 12 NULL 2 Using where +1 SIMPLE t2 eq_ref PRIMARY PRIMARY 18 test.t1.fk 1 Using where +DROP TABLE t1,t2; +CREATE TABLE t1 (a int, b varchar(20) NOT NULL, PRIMARY KEY(a)); +CREATE TABLE t2 (a int, b varchar(20) NOT NULL, +PRIMARY KEY (a), UNIQUE KEY (b)); +INSERT INTO t1 VALUES (1,'a'),(2,'b'),(3,'c'); +INSERT INTO t2 VALUES (1,'a'),(2,'b'),(3,'c'); +EXPLAIN SELECT t1.a FROM t1 LEFT JOIN t2 ON t2.b=t1.b WHERE t1.a=3; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 +DROP TABLE t1,t2; +CREATE TABLE t1(id int PRIMARY KEY, b int, e int); +CREATE TABLE t2(i int, a int, INDEX si(i), INDEX ai(a)); +CREATE TABLE t3(a int PRIMARY KEY, c char(4), INDEX ci(c)); +INSERT INTO t1 VALUES +(1,10,19), (2,20,22), (4,41,42), (9,93,95), (7, 77,79), +(6,63,67), (5,55,58), (3,38,39), (8,81,89); +INSERT INTO t2 VALUES +(21,210), (41,410), (82,820), (83,830), (84,840), +(65,650), (51,510), (37,370), (94,940), (76,760), +(22,220), (33,330), (40,400), (95,950), (38,380), +(67,670), (88,880), (57,570), (96,960), (97,970); +INSERT INTO t3 VALUES +(210,'bb'), (950,'ii'), (400,'ab'), (500,'ee'), (220,'gg'), +(440,'gg'), (310,'eg'), (380,'ee'), (840,'bb'), (830,'ff'), +(230,'aa'), (960,'ii'), (410,'aa'), (510,'ee'), (290,'bb'), +(450,'gg'), (320,'dd'), (390,'hh'), (850,'jj'), (860,'ff'); +EXPLAIN +SELECT t3.a FROM t1,t2 FORCE INDEX (si),t3 +WHERE t1.id = 8 AND t2.i BETWEEN t1.b AND t1.e AND +t3.a=t2.a AND t3.c IN ('bb','ee'); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 +1 SIMPLE t2 range si si 5 NULL 4 Using where +1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where +EXPLAIN +SELECT t3.a FROM t1,t2,t3 +WHERE t1.id = 8 AND t2.i BETWEEN t1.b AND t1.e AND +t3.a=t2.a AND t3.c IN ('bb','ee') ; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 +1 SIMPLE t2 range si,ai si 5 NULL 4 Using where +1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where +EXPLAIN +SELECT t3.a FROM t1,t2 FORCE INDEX (si),t3 +WHERE t1.id = 8 AND (t2.i=t1.b OR t2.i=t1.e) AND t3.a=t2.a AND +t3.c IN ('bb','ee'); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 +1 SIMPLE t2 range si si 5 NULL 2 Using where +1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where +EXPLAIN +SELECT t3.a FROM t1,t2,t3 +WHERE t1.id = 8 AND (t2.i=t1.b OR t2.i=t1.e) AND t3.a=t2.a AND +t3.c IN ('bb','ee'); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 +1 SIMPLE t2 range si,ai si 5 NULL 2 Using where +1 SIMPLE t3 eq_ref PRIMARY,ci PRIMARY 4 test.t2.a 1 Using where +DROP TABLE t1,t2,t3; +CREATE TABLE t1 ( f1 int primary key, f2 int, f3 int, f4 int, f5 int, f6 int, checked_out int); +CREATE TABLE t2 ( f11 int PRIMARY KEY ); +INSERT INTO t1 VALUES (1,1,1,0,0,0,0),(2,1,1,3,8,1,0),(3,1,1,4,12,1,0); +INSERT INTO t2 VALUES (62); +SELECT * FROM t1 LEFT JOIN t2 ON f11 = t1.checked_out GROUP BY f1 ORDER BY f2, f3, f4, f5 LIMIT 0, 1; +f1 f2 f3 f4 f5 f6 checked_out f11 +1 1 1 0 0 0 0 NULL +DROP TABLE t1, t2; +DROP TABLE IF EXISTS t1; +CREATE TABLE t1(a int); +INSERT into t1 values (1), (2), (3); +SELECT * FROM t1 LIMIT 2, -1; +ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-1' at line 1 +DROP TABLE t1; +CREATE TABLE t1 ( +ID_with_null int NULL, +ID_better int NOT NULL, +INDEX idx1 (ID_with_null), +INDEX idx2 (ID_better) +); +INSERT INTO t1 VALUES (1,1), (2,1), (null,3), (null,3), (null,3), (null,3); +INSERT INTO t1 SELECT * FROM t1 WHERE ID_with_null IS NULL; +INSERT INTO t1 SELECT * FROM t1 WHERE ID_with_null IS NULL; +INSERT INTO t1 SELECT * FROM t1 WHERE ID_with_null IS NULL; +INSERT INTO t1 SELECT * FROM t1 WHERE ID_with_null IS NULL; +INSERT INTO t1 SELECT * FROM t1 WHERE ID_with_null IS NULL; +SELECT COUNT(*) FROM t1 WHERE ID_with_null IS NULL; +COUNT(*) +128 +SELECT COUNT(*) FROM t1 WHERE ID_better=1; +COUNT(*) +2 +EXPLAIN SELECT * FROM t1 WHERE ID_better=1 AND ID_with_null IS NULL; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref idx1,idx2 idx2 4 const 1 Using where +DROP INDEX idx1 ON t1; +CREATE UNIQUE INDEX idx1 ON t1(ID_with_null); +EXPLAIN SELECT * FROM t1 WHERE ID_better=1 AND ID_with_null IS NULL; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref idx1,idx2 idx2 4 const 1 Using where +DROP TABLE t1; +CREATE TABLE t1 ( +ID1_with_null int NULL, +ID2_with_null int NULL, +ID_better int NOT NULL, +INDEX idx1 (ID1_with_null, ID2_with_null), +INDEX idx2 (ID_better) +); +INSERT INTO t1 VALUES (1,1,1), (2,2,1), (3,null,3), (null,3,3), (null,null,3), +(3,null,3), (null,3,3), (null,null,3), (3,null,3), (null,3,3), (null,null,3); +INSERT INTO t1 SELECT * FROM t1 WHERE ID1_with_null IS NULL; +INSERT INTO t1 SELECT * FROM t1 WHERE ID2_with_null IS NULL; +INSERT INTO t1 SELECT * FROM t1 WHERE ID1_with_null IS NULL; +INSERT INTO t1 SELECT * FROM t1 WHERE ID2_with_null IS NULL; +INSERT INTO t1 SELECT * FROM t1 WHERE ID1_with_null IS NULL; +INSERT INTO t1 SELECT * FROM t1 WHERE ID2_with_null IS NULL; +SELECT COUNT(*) FROM t1 WHERE ID1_with_null IS NULL AND ID2_with_null=3; +COUNT(*) +24 +SELECT COUNT(*) FROM t1 WHERE ID1_with_null=3 AND ID2_with_null IS NULL; +COUNT(*) +24 +SELECT COUNT(*) FROM t1 WHERE ID1_with_null IS NULL AND ID2_with_null IS NULL; +COUNT(*) +192 +SELECT COUNT(*) FROM t1 WHERE ID_better=1; +COUNT(*) +2 +EXPLAIN SELECT * FROM t1 +WHERE ID_better=1 AND ID1_with_null IS NULL AND ID2_with_null=3 ; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref idx1,idx2 idx2 4 const 1 Using where +EXPLAIN SELECT * FROM t1 +WHERE ID_better=1 AND ID1_with_null=3 AND ID2_with_null=3 IS NULL ; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref idx1,idx2 idx2 4 const 1 Using where +EXPLAIN SELECT * FROM t1 +WHERE ID_better=1 AND ID1_with_null IS NULL AND ID2_with_null IS NULL; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref idx1,idx2 idx2 4 const 1 Using where +DROP INDEX idx1 ON t1; +CREATE UNIQUE INDEX idx1 ON t1(ID1_with_null,ID2_with_null); +EXPLAIN SELECT * FROM t1 +WHERE ID_better=1 AND ID1_with_null IS NULL AND ID2_with_null=3 ; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref idx1,idx2 idx2 4 const 1 Using where +EXPLAIN SELECT * FROM t1 +WHERE ID_better=1 AND ID1_with_null=3 AND ID2_with_null IS NULL ; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref idx1,idx2 idx2 4 const 1 Using where +EXPLAIN SELECT * FROM t1 +WHERE ID_better=1 AND ID1_with_null IS NULL AND ID2_with_null IS NULL; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref idx1,idx2 idx2 4 const 1 Using where +EXPLAIN SELECT * FROM t1 +WHERE ID_better=1 AND ID1_with_null IS NULL AND +(ID2_with_null=1 OR ID2_with_null=2); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref idx1,idx2 idx2 4 const 1 Using where +DROP TABLE t1; +CREATE TABLE t1 (a INT, ts TIMESTAMP, KEY ts(ts)); +INSERT INTO t1 VALUES (30,"2006-01-03 23:00:00"), (31,"2006-01-03 23:00:00"); +ANALYZE TABLE t1; +Table Op Msg_type Msg_text +test.t1 analyze status OK +CREATE TABLE t2 (a INT, dt1 DATETIME, dt2 DATETIME, PRIMARY KEY (a)); +INSERT INTO t2 VALUES (30, "2006-01-01 00:00:00", "2999-12-31 00:00:00"); +INSERT INTO t2 SELECT a+1,dt1,dt2 FROM t2; +ANALYZE TABLE t2; +Table Op Msg_type Msg_text +test.t2 analyze status OK +EXPLAIN +SELECT * FROM t1 LEFT JOIN t2 ON (t1.a=t2.a) WHERE t1.a=30 +AND t1.ts BETWEEN t2.dt1 AND t2.dt2 +AND t1.ts BETWEEN "2006-01-01" AND "2006-12-31"; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 const PRIMARY PRIMARY 4 const 1 +1 SIMPLE t1 range ts ts 4 NULL 1 Using where +Warnings: +Warning 1292 Incorrect datetime value: '2999-12-31 00:00:00' for column 'ts' at row 1 +SELECT * FROM t1 LEFT JOIN t2 ON (t1.a=t2.a) WHERE t1.a=30 +AND t1.ts BETWEEN t2.dt1 AND t2.dt2 +AND t1.ts BETWEEN "2006-01-01" AND "2006-12-31"; +a ts a dt1 dt2 +30 2006-01-03 23:00:00 30 2006-01-01 00:00:00 2999-12-31 00:00:00 +Warnings: +Warning 1292 Incorrect datetime value: '2999-12-31 00:00:00' for column 'ts' at row 1 +DROP TABLE t1,t2; +create table t1 (a bigint unsigned); +insert into t1 values +(if(1, 9223372036854775808, 1)), +(case when 1 then 9223372036854775808 else 1 end), +(coalesce(9223372036854775808, 1)); +select * from t1; +a +9223372036854775808 +9223372036854775808 +9223372036854775808 +drop table t1; +create table t1 select +if(1, 9223372036854775808, 1) i, +case when 1 then 9223372036854775808 else 1 end c, +coalesce(9223372036854775808, 1) co; +show create table t1; +Table Create Table +t1 CREATE TABLE `t1` ( + `i` decimal(19,0) NOT NULL DEFAULT '0', + `c` decimal(19,0) NOT NULL DEFAULT '0', + `co` decimal(19,0) NOT NULL DEFAULT '0' +) ENGINE=MyISAM DEFAULT CHARSET=latin1 +drop table t1; +select +if(1, cast(1111111111111111111 as unsigned), 1) i, +case when 1 then cast(1111111111111111111 as unsigned) else 1 end c, +coalesce(cast(1111111111111111111 as unsigned), 1) co; +i c co +1111111111111111111 1111111111111111111 1111111111111111111 +CREATE TABLE t1 (name varchar(255)); +CREATE TABLE t2 (name varchar(255), n int, KEY (name(3))); +INSERT INTO t1 VALUES ('ccc'), ('bb'), ('cc '), ('aa '), ('aa'); +INSERT INTO t2 VALUES ('bb',1), ('aa',2), ('cc ',3); +INSERT INTO t2 VALUES (concat('cc ', 0x06), 4); +INSERT INTO t2 VALUES ('cc',5), ('bb ',6), ('cc ',7); +SELECT * FROM t2; +name n +bb 1 +aa 2 +cc 3 +cc  4 +cc 5 +bb 6 +cc 7 +SELECT * FROM t2 ORDER BY name; +name n +aa 2 +bb 1 +bb 6 +cc  4 +cc 3 +cc 5 +cc 7 +SELECT name, LENGTH(name), n FROM t2 ORDER BY name; +name LENGTH(name) n +aa 2 2 +bb 2 1 +bb 3 6 +cc  4 4 +cc 5 3 +cc 2 5 +cc 3 7 +EXPLAIN SELECT name, LENGTH(name), n FROM t2 WHERE name='cc '; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ref name name 6 const 3 Using where +SELECT name, LENGTH(name), n FROM t2 WHERE name='cc '; +name LENGTH(name) n +cc 5 3 +cc 2 5 +cc 3 7 +EXPLAIN SELECT name , LENGTH(name), n FROM t2 WHERE name LIKE 'cc%'; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 range name name 6 NULL 3 Using where +SELECT name , LENGTH(name), n FROM t2 WHERE name LIKE 'cc%'; +name LENGTH(name) n +cc 5 3 +cc  4 4 +cc 2 5 +cc 3 7 +EXPLAIN SELECT name , LENGTH(name), n FROM t2 WHERE name LIKE 'cc%' ORDER BY name; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 range name name 6 NULL 3 Using where; Using filesort +SELECT name , LENGTH(name), n FROM t2 WHERE name LIKE 'cc%' ORDER BY name; +name LENGTH(name) n +cc  4 4 +cc 5 3 +cc 2 5 +cc 3 7 +EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.name=t2.name; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 5 +1 SIMPLE t2 ref name name 6 test.t1.name 2 +SELECT * FROM t1 LEFT JOIN t2 ON t1.name=t2.name; +name name n +ccc NULL NULL +bb bb 1 +bb bb 6 +cc cc 3 +cc cc 5 +cc cc 7 +aa aa 2 +aa aa 2 +DROP TABLE t1,t2; +CREATE TABLE t1 (name text); +CREATE TABLE t2 (name text, n int, KEY (name(3))); +INSERT INTO t1 VALUES ('ccc'), ('bb'), ('cc '), ('aa '), ('aa'); +INSERT INTO t2 VALUES ('bb',1), ('aa',2), ('cc ',3); +INSERT INTO t2 VALUES (concat('cc ', 0x06), 4); +INSERT INTO t2 VALUES ('cc',5), ('bb ',6), ('cc ',7); +SELECT * FROM t2; +name n +bb 1 +aa 2 +cc 3 +cc  4 +cc 5 +bb 6 +cc 7 +SELECT * FROM t2 ORDER BY name; +name n +aa 2 +bb 1 +bb 6 +cc  4 +cc 3 +cc 5 +cc 7 +SELECT name, LENGTH(name), n FROM t2 ORDER BY name; +name LENGTH(name) n +aa 2 2 +bb 2 1 +bb 3 6 +cc  4 4 +cc 5 3 +cc 2 5 +cc 3 7 +EXPLAIN SELECT name, LENGTH(name), n FROM t2 WHERE name='cc '; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ref name name 6 const 3 Using where +SELECT name, LENGTH(name), n FROM t2 WHERE name='cc '; +name LENGTH(name) n +cc 5 3 +cc 2 5 +cc 3 7 +EXPLAIN SELECT name , LENGTH(name), n FROM t2 WHERE name LIKE 'cc%'; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 range name name 6 NULL 3 Using where +SELECT name , LENGTH(name), n FROM t2 WHERE name LIKE 'cc%'; +name LENGTH(name) n +cc 5 3 +cc  4 4 +cc 2 5 +cc 3 7 +EXPLAIN SELECT name , LENGTH(name), n FROM t2 WHERE name LIKE 'cc%' ORDER BY name; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 range name name 6 NULL 3 Using where; Using filesort +SELECT name , LENGTH(name), n FROM t2 WHERE name LIKE 'cc%' ORDER BY name; +name LENGTH(name) n +cc  4 4 +cc 5 3 +cc 2 5 +cc 3 7 +EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.name=t2.name; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 5 +1 SIMPLE t2 ref name name 6 test.t1.name 2 +SELECT * FROM t1 LEFT JOIN t2 ON t1.name=t2.name; +name name n +ccc NULL NULL +bb bb 1 +bb bb 6 +cc cc 3 +cc cc 5 +cc cc 7 +aa aa 2 +aa aa 2 +DROP TABLE t1,t2; +CREATE TABLE t1 ( +access_id int NOT NULL default '0', +name varchar(20) default NULL, +rank int NOT NULL default '0', +KEY idx (access_id) +); +CREATE TABLE t2 ( +faq_group_id int NOT NULL default '0', +faq_id int NOT NULL default '0', +access_id int default NULL, +UNIQUE KEY idx1 (faq_id), +KEY idx2 (faq_group_id,faq_id) +); +INSERT INTO t1 VALUES +(1,'Everyone',2),(2,'Help',3),(3,'Technical Support',1),(4,'Chat User',4); +INSERT INTO t2 VALUES +(261,265,1),(490,494,1); +SELECT t2.faq_id +FROM t1 INNER JOIN t2 IGNORE INDEX (idx1) +ON (t1.access_id = t2.access_id) +LEFT JOIN t2 t +ON (t.faq_group_id = t2.faq_group_id AND +find_in_set(t.access_id, '1,4') < find_in_set(t2.access_id, '1,4')) +WHERE +t2.access_id IN (1,4) AND t.access_id IS NULL AND t2.faq_id in (265); +faq_id +265 +SELECT t2.faq_id +FROM t1 INNER JOIN t2 +ON (t1.access_id = t2.access_id) +LEFT JOIN t2 t +ON (t.faq_group_id = t2.faq_group_id AND +find_in_set(t.access_id, '1,4') < find_in_set(t2.access_id, '1,4')) +WHERE +t2.access_id IN (1,4) AND t.access_id IS NULL AND t2.faq_id in (265); +faq_id +265 +DROP TABLE t1,t2; +CREATE TABLE t1 (a INT, b INT, KEY inx (b,a)); +INSERT INTO t1 VALUES (1,1), (1,2), (1,3), (1,4), (1,5), (1, 6), (1,7); +EXPLAIN SELECT COUNT(*) FROM t1 f1 INNER JOIN t1 f2 +ON ( f1.b=f2.b AND f1.a<f2.a ) +WHERE 1 AND f1.b NOT IN (100,2232,3343,51111); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE f1 index inx inx 10 NULL 7 Using where; Using index +1 SIMPLE f2 ref inx inx 5 test.f1.b 1 Using where; Using index +DROP TABLE t1; +CREATE TABLE t1 (c1 INT, c2 INT); +INSERT INTO t1 VALUES (1,11), (2,22), (2,22); +EXPLAIN SELECT c1 FROM t1 WHERE (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT COUNT(c2)))))))))))))))))))))))))))))))) > 0; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where +31 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No tables used +32 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL No tables used +EXPLAIN SELECT c1 FROM t1 WHERE (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT (SELECT COUNT(c2))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))) > 0; +ERROR HY000: Too high level of nesting for select +DROP TABLE t1; +CREATE TABLE t1 ( +c1 int(11) NOT NULL AUTO_INCREMENT, +c2 varchar(1000) DEFAULT NULL, +c3 bigint(20) DEFAULT NULL, +c4 bigint(20) DEFAULT NULL, +PRIMARY KEY (c1) +); +EXPLAIN EXTENDED +SELECT join_2.c1 +FROM +t1 AS join_0, +t1 AS join_1, +t1 AS join_2, +t1 AS join_3, +t1 AS join_4, +t1 AS join_5, +t1 AS join_6, +t1 AS join_7 +WHERE +join_0.c1=join_1.c1 AND +join_1.c1=join_2.c1 AND +join_2.c1=join_3.c1 AND +join_3.c1=join_4.c1 AND +join_4.c1=join_5.c1 AND +join_5.c1=join_6.c1 AND +join_6.c1=join_7.c1 +OR +join_0.c2 < '?' AND +join_1.c2 < '?' AND +join_2.c2 > '?' AND +join_2.c2 < '!' AND +join_3.c2 > '?' AND +join_4.c2 = '?' AND +join_5.c2 <> '?' AND +join_6.c2 <> '?' AND +join_7.c2 >= '?' AND +join_0.c1=join_1.c1 AND +join_1.c1=join_2.c1 AND +join_2.c1=join_3.c1 AND +join_3.c1=join_4.c1 AND +join_4.c1=join_5.c1 AND +join_5.c1=join_6.c1 AND +join_6.c1=join_7.c1 +GROUP BY +join_3.c1, +join_2.c1, +join_7.c1, +join_1.c1, +join_0.c1; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +Warnings: +Note 1003 select '0' AS `c1` from `test`.`t1` `join_0` join `test`.`t1` `join_1` join `test`.`t1` `join_2` join `test`.`t1` `join_3` join `test`.`t1` `join_4` join `test`.`t1` `join_5` join `test`.`t1` `join_6` join `test`.`t1` `join_7` where 0 group by '0','0','0','0','0' +SHOW WARNINGS; +Level Code Message +Note 1003 select '0' AS `c1` from `test`.`t1` `join_0` join `test`.`t1` `join_1` join `test`.`t1` `join_2` join `test`.`t1` `join_3` join `test`.`t1` `join_4` join `test`.`t1` `join_5` join `test`.`t1` `join_6` join `test`.`t1` `join_7` where 0 group by '0','0','0','0','0' +DROP TABLE t1; +SELECT 1 AS ` `; + +1 +Warnings: +Warning 1474 Name ' ' has become '' +SELECT 1 AS ` `; + +1 +Warnings: +Warning 1474 Name ' ' has become '' +SELECT 1 AS ` x`; +x +1 +Warnings: +Warning 1466 Leading spaces are removed from name ' x' +CREATE VIEW v1 AS SELECT 1 AS ``; +ERROR 42000: Incorrect column name '' +CREATE VIEW v1 AS SELECT 1 AS ` `; +ERROR 42000: Incorrect column name ' ' +CREATE VIEW v1 AS SELECT 1 AS ` `; +ERROR 42000: Incorrect column name ' ' +CREATE VIEW v1 AS SELECT (SELECT 1 AS ` `); +ERROR 42000: Incorrect column name ' ' +CREATE VIEW v1 AS SELECT 1 AS ` x`; +Warnings: +Warning 1466 Leading spaces are removed from name ' x' +SELECT `x` FROM v1; +x +1 +ALTER VIEW v1 AS SELECT 1 AS ` `; +ERROR 42000: Incorrect column name ' ' +DROP VIEW v1; +select str_to_date('2007-10-09','%Y-%m-%d') between '2007/10/01 00:00:00 GMT' + and '2007/10/20 00:00:00 GMT'; +str_to_date('2007-10-09','%Y-%m-%d') between '2007/10/01 00:00:00 GMT' + and '2007/10/20 00:00:00 GMT' +1 +Warnings: +Warning 1292 Truncated incorrect datetime value: '2007/10/01 00:00:00 GMT' +Warning 1292 Truncated incorrect datetime value: '2007/10/20 00:00:00 GMT' +select str_to_date('2007-10-09','%Y-%m-%d') > '2007/10/01 00:00:00 GMT-6'; +str_to_date('2007-10-09','%Y-%m-%d') > '2007/10/01 00:00:00 GMT-6' +1 +Warnings: +Warning 1292 Truncated incorrect date value: '2007/10/01 00:00:00 GMT-6' +select str_to_date('2007-10-09','%Y-%m-%d') <= '2007/10/2000:00:00 GMT-6'; +str_to_date('2007-10-09','%Y-%m-%d') <= '2007/10/2000:00:00 GMT-6' +1 +Warnings: +Warning 1292 Truncated incorrect date value: '2007/10/2000:00:00 GMT-6' +select str_to_date('2007-10-01','%Y-%m-%d') = '2007-10-1 00:00:00 GMT-6'; +str_to_date('2007-10-01','%Y-%m-%d') = '2007-10-1 00:00:00 GMT-6' +1 +Warnings: +Warning 1292 Truncated incorrect date value: '2007-10-1 00:00:00 GMT-6' +select str_to_date('2007-10-01','%Y-%m-%d') = '2007-10-01 x00:00:00 GMT-6'; +str_to_date('2007-10-01','%Y-%m-%d') = '2007-10-01 x00:00:00 GMT-6' +1 +Warnings: +Warning 1292 Truncated incorrect date value: '2007-10-01 x00:00:00 GMT-6' +select str_to_date('2007-10-01','%Y-%m-%d %H:%i:%s') = '2007-10-01 00:00:00 GMT-6'; +str_to_date('2007-10-01','%Y-%m-%d %H:%i:%s') = '2007-10-01 00:00:00 GMT-6' +1 +Warnings: +Warning 1292 Truncated incorrect datetime value: '2007-10-01 00:00:00 GMT-6' +select str_to_date('2007-10-01','%Y-%m-%d %H:%i:%s') = '2007-10-01 00:x00:00 GMT-6'; +str_to_date('2007-10-01','%Y-%m-%d %H:%i:%s') = '2007-10-01 00:x00:00 GMT-6' +1 +Warnings: +Warning 1292 Truncated incorrect datetime value: '2007-10-01 00:x00:00 GMT-6' +select str_to_date('2007-10-01','%Y-%m-%d %H:%i:%s') = '2007-10-01 x12:34:56 GMT-6'; +str_to_date('2007-10-01','%Y-%m-%d %H:%i:%s') = '2007-10-01 x12:34:56 GMT-6' +1 +Warnings: +Warning 1292 Truncated incorrect datetime value: '2007-10-01 x12:34:56 GMT-6' +select str_to_date('2007-10-01 12:34:00','%Y-%m-%d %H:%i:%s') = '2007-10-01 12:34x:56 GMT-6'; +str_to_date('2007-10-01 12:34:00','%Y-%m-%d %H:%i:%s') = '2007-10-01 12:34x:56 GMT-6' +1 +Warnings: +Warning 1292 Truncated incorrect datetime value: '2007-10-01 12:34x:56 GMT-6' +select str_to_date('2007-10-01 12:34:56','%Y-%m-%d %H:%i:%s') = '2007-10-01 12:34x:56 GMT-6'; +str_to_date('2007-10-01 12:34:56','%Y-%m-%d %H:%i:%s') = '2007-10-01 12:34x:56 GMT-6' +0 +Warnings: +Warning 1292 Truncated incorrect datetime value: '2007-10-01 12:34x:56 GMT-6' +select str_to_date('2007-10-01 12:34:56','%Y-%m-%d %H:%i:%s') = '2007-10-01 12:34:56'; +str_to_date('2007-10-01 12:34:56','%Y-%m-%d %H:%i:%s') = '2007-10-01 12:34:56' +1 +select str_to_date('2007-10-01','%Y-%m-%d') = '2007-10-01 12:00:00'; +str_to_date('2007-10-01','%Y-%m-%d') = '2007-10-01 12:00:00' +0 +select str_to_date('2007-10-01 12','%Y-%m-%d %H') = '2007-10-01 12:00:00'; +str_to_date('2007-10-01 12','%Y-%m-%d %H') = '2007-10-01 12:00:00' +1 +select str_to_date('2007-10-01 12:34','%Y-%m-%d %H') = '2007-10-01 12:00:00'; +str_to_date('2007-10-01 12:34','%Y-%m-%d %H') = '2007-10-01 12:00:00' +1 +Warnings: +Warning 1292 Truncated incorrect datetime value: '2007-10-01 12:34' +select str_to_date('2007-02-30 12:34','%Y-%m-%d %H:%i') = '2007-02-30 12:34'; +str_to_date('2007-02-30 12:34','%Y-%m-%d %H:%i') = '2007-02-30 12:34' +1 +select str_to_date('2007-10-00 12:34','%Y-%m-%d %H:%i') = '2007-10-00 12:34'; +str_to_date('2007-10-00 12:34','%Y-%m-%d %H:%i') = '2007-10-00 12:34' +1 +select str_to_date('2007-10-00','%Y-%m-%d') between '2007/09/01 00:00:00' + and '2007/10/20 00:00:00'; +str_to_date('2007-10-00','%Y-%m-%d') between '2007/09/01 00:00:00' + and '2007/10/20 00:00:00' +1 +set SQL_MODE=TRADITIONAL; +select str_to_date('2007-10-00 12:34','%Y-%m-%d %H:%i') = '2007-10-00 12:34'; +str_to_date('2007-10-00 12:34','%Y-%m-%d %H:%i') = '2007-10-00 12:34' +0 +Warnings: +Warning 1292 Truncated incorrect datetime value: '2007-10-00 12:34' +select str_to_date('2007-10-01 12:34','%Y-%m-%d %H:%i') = '2007-10-00 12:34'; +str_to_date('2007-10-01 12:34','%Y-%m-%d %H:%i') = '2007-10-00 12:34' +0 +Warnings: +Warning 1292 Truncated incorrect datetime value: '2007-10-00 12:34' +select str_to_date('2007-10-00 12:34','%Y-%m-%d %H:%i') = '2007-10-01 12:34'; +str_to_date('2007-10-00 12:34','%Y-%m-%d %H:%i') = '2007-10-01 12:34' +0 +Warnings: +Warning 1292 Truncated incorrect datetime value: '2007-10-00 12:34:00' +select str_to_date('2007-10-00','%Y-%m-%d') between '2007/09/01' + and '2007/10/20'; +str_to_date('2007-10-00','%Y-%m-%d') between '2007/09/01' + and '2007/10/20' +0 +Warnings: +Warning 1292 Incorrect datetime value: '2007-10-00' for column '2007/09/01' at row 1 +Warning 1292 Incorrect datetime value: '2007-10-00' for column '2007/10/20' at row 1 +set SQL_MODE=DEFAULT; +select str_to_date('2007-10-00','%Y-%m-%d') between '' and '2007/10/20'; +str_to_date('2007-10-00','%Y-%m-%d') between '' and '2007/10/20' +1 +Warnings: +Warning 1292 Truncated incorrect datetime value: '' +select str_to_date('','%Y-%m-%d') between '2007/10/01' and '2007/10/20'; +str_to_date('','%Y-%m-%d') between '2007/10/01' and '2007/10/20' +0 +select str_to_date('','%Y-%m-%d %H:%i') = '2007-10-01 12:34'; +str_to_date('','%Y-%m-%d %H:%i') = '2007-10-01 12:34' +0 +select str_to_date(NULL,'%Y-%m-%d %H:%i') = '2007-10-01 12:34'; +str_to_date(NULL,'%Y-%m-%d %H:%i') = '2007-10-01 12:34' +NULL +select str_to_date('2007-10-00 12:34','%Y-%m-%d %H:%i') = ''; +str_to_date('2007-10-00 12:34','%Y-%m-%d %H:%i') = '' +0 +Warnings: +Warning 1292 Truncated incorrect datetime value: '' +select str_to_date('1','%Y-%m-%d') = '1'; +str_to_date('1','%Y-%m-%d') = '1' +0 +Warnings: +Warning 1292 Truncated incorrect date value: '1' +select str_to_date('1','%Y-%m-%d') = '1'; +str_to_date('1','%Y-%m-%d') = '1' +0 +Warnings: +Warning 1292 Truncated incorrect date value: '1' +select str_to_date('','%Y-%m-%d') = ''; +str_to_date('','%Y-%m-%d') = '' +0 +Warnings: +Warning 1292 Truncated incorrect date value: '' +select str_to_date('1000-01-01','%Y-%m-%d') between '0000-00-00' and NULL; +str_to_date('1000-01-01','%Y-%m-%d') between '0000-00-00' and NULL +0 +select str_to_date('1000-01-01','%Y-%m-%d') between NULL and '2000-00-00'; +str_to_date('1000-01-01','%Y-%m-%d') between NULL and '2000-00-00' +0 +select str_to_date('1000-01-01','%Y-%m-%d') between NULL and NULL; +str_to_date('1000-01-01','%Y-%m-%d') between NULL and NULL +0 +CREATE TABLE t1 (c11 INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY); +CREATE TABLE t2 (c21 INT UNSIGNED NOT NULL, +c22 INT DEFAULT NULL, +KEY(c21, c22)); +CREATE TABLE t3 (c31 INT UNSIGNED NOT NULL DEFAULT 0, +c32 INT DEFAULT NULL, +c33 INT NOT NULL, +c34 INT UNSIGNED DEFAULT 0, +KEY (c33, c34, c32)); +INSERT INTO t1 values (),(),(),(),(); +INSERT INTO t2 SELECT a.c11, b.c11 FROM t1 a, t1 b; +INSERT INTO t3 VALUES (1, 1, 1, 0), +(2, 2, 0, 0), +(3, 3, 1, 0), +(4, 4, 0, 0), +(5, 5, 1, 0); +SELECT c32 FROM t1, t2, t3 WHERE t1.c11 IN (1, 3, 5) AND +t3.c31 = t1.c11 AND t2.c21 = t1.c11 AND +t3.c33 = 1 AND t2.c22 in (1, 3) +ORDER BY c32; +c32 +1 +1 +3 +3 +5 +5 +SELECT c32 FROM t1, t2, t3 WHERE t1.c11 IN (1, 3, 5) AND +t3.c31 = t1.c11 AND t2.c21 = t1.c11 AND +t3.c33 = 1 AND t2.c22 in (1, 3) +ORDER BY c32 DESC; +c32 +5 +5 +3 +3 +1 +1 +DROP TABLE t1, t2, t3; + +# +# Bug#30736: Row Size Too Large Error Creating a Table and +# Inserting Data. +# +DROP TABLE IF EXISTS t1; +DROP TABLE IF EXISTS t2; + +CREATE TABLE t1( +c1 DECIMAL(10, 2), +c2 FLOAT); + +INSERT INTO t1 VALUES (0, 1), (2, 3), (4, 5); + +CREATE TABLE t2( +c3 DECIMAL(10, 2)) +SELECT +c1 * c2 AS c3 +FROM t1; + +SELECT * FROM t1; +c1 c2 +0.00 1 +2.00 3 +4.00 5 + +SELECT * FROM t2; +c3 +0.00 +6.00 +20.00 + +DROP TABLE t1; +DROP TABLE t2; + +CREATE TABLE t1 (c1 BIGINT NOT NULL); +INSERT INTO t1 (c1) VALUES (1); +SELECT * FROM t1 WHERE c1 > NULL + 1; +c1 +DROP TABLE t1; + +CREATE TABLE t1 (a VARCHAR(10) NOT NULL PRIMARY KEY); +INSERT INTO t1 (a) VALUES ('foo0'), ('bar0'), ('baz0'); +SELECT * FROM t1 WHERE a IN (CONCAT('foo', 0), 'bar'); +a +foo0 +DROP TABLE t1; +CREATE TABLE t1 (a INT, b INT); +CREATE TABLE t2 (a INT, c INT, KEY(a)); +INSERT INTO t1 VALUES (1, 1), (2, 2); +INSERT INTO t2 VALUES (1, 1), (1, 2), (1, 3), (1, 4), (1, 5), +(2, 1), (2, 2), (2, 3), (2, 4), (2, 5), +(3, 1), (3, 2), (3, 3), (3, 4), (3, 5), +(4, 1), (4, 2), (4, 3), (4, 4), (4, 5); +FLUSH STATUS; +SELECT DISTINCT b FROM t1 LEFT JOIN t2 USING(a) WHERE c <= 3; +b +1 +2 +SHOW STATUS LIKE 'Handler_read%'; +Variable_name Value +Handler_read_first 0 +Handler_read_key 2 +Handler_read_next 0 +Handler_read_prev 0 +Handler_read_rnd 0 +Handler_read_rnd_next 6 +DROP TABLE t1, t2; +CREATE TABLE t1 (f1 bigint(20) NOT NULL default '0', +f2 int(11) NOT NULL default '0', +f3 bigint(20) NOT NULL default '0', +f4 varchar(255) NOT NULL default '', +PRIMARY KEY (f1), +KEY key1 (f4), +KEY key2 (f2)); +CREATE TABLE t2 (f1 int(11) NOT NULL default '0', +f2 enum('A1','A2','A3') NOT NULL default 'A1', +f3 int(11) NOT NULL default '0', +PRIMARY KEY (f1), +KEY key1 (f3)); +CREATE TABLE t3 (f1 bigint(20) NOT NULL default '0', +f2 datetime NOT NULL default '1980-01-01 00:00:00', +PRIMARY KEY (f1)); +insert into t1 values (1, 1, 1, 'abc'); +insert into t1 values (2, 1, 2, 'def'); +insert into t1 values (3, 1, 2, 'def'); +insert into t2 values (1, 'A1', 1); +insert into t3 values (1, '1980-01-01'); +SELECT a.f3, cr.f4, count(*) count +FROM t2 a +STRAIGHT_JOIN t1 cr ON cr.f2 = a.f1 +LEFT JOIN +(t1 cr2 +JOIN t3 ae2 ON cr2.f3 = ae2.f1 +) ON a.f1 = cr2.f2 AND ae2.f2 < now() - INTERVAL 7 DAY AND +cr.f4 = cr2.f4 +GROUP BY a.f3, cr.f4; +f3 f4 count +1 abc 1 +1 def 2 +drop table t1, t2, t3; +CREATE TABLE t1 (a INT KEY, b INT); +INSERT INTO t1 VALUES (1,1), (2,2), (3,3), (4,4); +EXPLAIN EXTENDED SELECT a, b FROM t1 WHERE a > 1 AND a = b LIMIT 2; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t1 range PRIMARY PRIMARY 4 NULL 3 100.00 Using where +Warnings: +Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where ((`test`.`t1`.`b` = `test`.`t1`.`a`) and (`test`.`t1`.`a` > 1)) limit 2 +EXPLAIN EXTENDED SELECT a, b FROM t1 WHERE a > 1 AND b = a LIMIT 2; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t1 range PRIMARY PRIMARY 4 NULL 3 100.00 Using where +Warnings: +Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where ((`test`.`t1`.`a` = `test`.`t1`.`b`) and (`test`.`t1`.`a` > 1)) limit 2 +DROP TABLE t1; +# +# Bug#47019: Assertion failed: 0, file .\rt_mbr.c, line 138 when +# forcing a spatial index +# +CREATE TABLE t1(a LINESTRING NOT NULL, SPATIAL KEY(a)); +INSERT INTO t1 VALUES +(GEOMFROMTEXT('LINESTRING(-1 -1, 1 -1, -1 -1, -1 1, 1 1)')), +(GEOMFROMTEXT('LINESTRING(-1 -1, 1 -1, -1 -1, -1 1, 1 1)')); +EXPLAIN SELECT 1 FROM t1 NATURAL LEFT JOIN t1 AS t2; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 2 +1 SIMPLE t2 ALL a NULL NULL NULL 2 +SELECT 1 FROM t1 NATURAL LEFT JOIN t1 AS t2; +1 +1 +1 +1 +1 +EXPLAIN SELECT 1 FROM t1 NATURAL LEFT JOIN t1 AS t2 FORCE INDEX(a); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 2 +1 SIMPLE t2 ALL a NULL NULL NULL 2 +SELECT 1 FROM t1 NATURAL LEFT JOIN t1 AS t2 FORCE INDEX(a); +1 +1 +1 +1 +1 +DROP TABLE t1; +# +# Bug #48291 : crash with row() operator,select into @var, and +# subquery returning multiple rows +# +CREATE TABLE t1(a INT); +INSERT INTO t1 VALUES (2),(3); +# Should not crash +SELECT 1 FROM t1 WHERE a <> 1 AND NOT +ROW(a,a) <=> ROW((SELECT 1 FROM t1 WHERE 1=2),(SELECT 1 FROM t1)) +INTO @var0; +ERROR 21000: Subquery returns more than 1 row +DROP TABLE t1; +# +# Bug #48458: simple query tries to allocate enormous amount of +# memory +# +CREATE TABLE t1(a INT NOT NULL, b YEAR); +INSERT INTO t1 VALUES (); +Warnings: +Warning 1364 Field 'a' doesn't have a default value +CREATE TABLE t2(c INT); +# Should not err out because of out-of-memory +SELECT 1 FROM t2 JOIN t1 ON 1=1 +WHERE a != '1' AND NOT a >= b OR NOT ROW(b,a )<> ROW(a,a); +1 +DROP TABLE t1,t2; +# +# Bug #49199: Optimizer handles incorrectly: +# field='const1' AND field='const2' in some cases + +CREATE TABLE t1(a DATETIME NOT NULL); +INSERT INTO t1 VALUES('2001-01-01'); +SELECT * FROM t1 WHERE a='2001-01-01' AND a='2001-01-01 00:00:00'; +a +2001-01-01 00:00:00 +EXPLAIN EXTENDED SELECT * FROM t1 WHERE a='2001-01-01' AND a='2001-01-01 00:00:00'; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t1 system NULL NULL NULL NULL 1 100.00 +Warnings: +Note 1003 select '2001-01-01 00:00:00' AS `a` from `test`.`t1` where 1 +DROP TABLE t1; +CREATE TABLE t1(a DATE NOT NULL); +INSERT INTO t1 VALUES('2001-01-01'); +SELECT * FROM t1 WHERE a='2001-01-01' AND a='2001-01-01 00:00:00'; +a +2001-01-01 +EXPLAIN EXTENDED SELECT * FROM t1 WHERE a='2001-01-01' AND a='2001-01-01 00:00:00'; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t1 system NULL NULL NULL NULL 1 100.00 +Warnings: +Note 1003 select '2001-01-01' AS `a` from `test`.`t1` where 1 +DROP TABLE t1; +CREATE TABLE t1(a TIMESTAMP NOT NULL); +INSERT INTO t1 VALUES('2001-01-01'); +SELECT * FROM t1 WHERE a='2001-01-01' AND a='2001-01-01 00:00:00'; +a +2001-01-01 00:00:00 +EXPLAIN EXTENDED SELECT * FROM t1 WHERE a='2001-01-01' AND a='2001-01-01 00:00:00'; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t1 system NULL NULL NULL NULL 1 100.00 +Warnings: +Note 1003 select '2001-01-01 00:00:00' AS `a` from `test`.`t1` where 1 +DROP TABLE t1; +CREATE TABLE t1(a DATETIME NOT NULL, b DATE NOT NULL); +INSERT INTO t1 VALUES('2001-01-01', '2001-01-01'); +SELECT * FROM t1 WHERE a='2001-01-01' AND a=b AND b='2001-01-01 00:00:00'; +a b +2001-01-01 00:00:00 2001-01-01 +EXPLAIN EXTENDED SELECT * FROM t1 WHERE a='2001-01-01' AND a=b AND b='2001-01-01 00:00:00'; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t1 system NULL NULL NULL NULL 1 100.00 +Warnings: +Note 1003 select '2001-01-01 00:00:00' AS `a`,'2001-01-01' AS `b` from `test`.`t1` where 1 +DROP TABLE t1; +CREATE TABLE t1(a DATETIME NOT NULL, b VARCHAR(20) NOT NULL); +INSERT INTO t1 VALUES('2001-01-01', '2001-01-01'); +SELECT * FROM t1 WHERE a='2001-01-01' AND a=b AND b='2001-01-01 00:00:00'; +a b +EXPLAIN EXTENDED SELECT * FROM t1 WHERE a='2001-01-01' AND a=b AND b='2001-01-01 00:00:00'; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +Warnings: +Note 1003 select '2001-01-01 00:00:00' AS `a`,'2001-01-01' AS `b` from `test`.`t1` where 0 +SELECT * FROM t1 WHERE a='2001-01-01 00:00:00' AND a=b AND b='2001-01-01'; +a b +2001-01-01 00:00:00 2001-01-01 +EXPLAIN EXTENDED SELECT * FROM t1 WHERE a='2001-01-01 00:00:00' AND a=b AND b='2001-01-01'; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t1 system NULL NULL NULL NULL 1 100.00 +Warnings: +Note 1003 select '2001-01-01 00:00:00' AS `a`,'2001-01-01' AS `b` from `test`.`t1` where 1 +DROP TABLE t1; +CREATE TABLE t1(a DATETIME NOT NULL, b DATE NOT NULL); +INSERT INTO t1 VALUES('2001-01-01', '2001-01-01'); +SELECT x.a, y.a, z.a FROM t1 x +JOIN t1 y ON x.a=y.a +JOIN t1 z ON y.a=z.a +WHERE x.a='2001-01-01' AND z.a='2001-01-01 00:00:00'; +a a a +2001-01-01 00:00:00 2001-01-01 00:00:00 2001-01-01 00:00:00 +EXPLAIN EXTENDED SELECT x.a, y.a, z.a FROM t1 x +JOIN t1 y ON x.a=y.a +JOIN t1 z ON y.a=z.a +WHERE x.a='2001-01-01' AND z.a='2001-01-01 00:00:00'; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE x system NULL NULL NULL NULL 1 100.00 +1 SIMPLE y system NULL NULL NULL NULL 1 100.00 +1 SIMPLE z system NULL NULL NULL NULL 1 100.00 +Warnings: +Note 1003 select '2001-01-01 00:00:00' AS `a`,'2001-01-01 00:00:00' AS `a`,'2001-01-01 00:00:00' AS `a` from `test`.`t1` `x` join `test`.`t1` `y` join `test`.`t1` `z` where 1 +DROP TABLE t1; +# +# Bug #49897: crash in ptr_compare when char(0) NOT NULL +# column is used for ORDER BY +# +SET @old_sort_buffer_size= @@session.sort_buffer_size; +SET @@sort_buffer_size= 40000; +CREATE TABLE t1(a CHAR(0) NOT NULL); +INSERT INTO t1 VALUES (0), (0), (0); +INSERT INTO t1 SELECT t11.a FROM t1 t11, t1 t12; +INSERT INTO t1 SELECT t11.a FROM t1 t11, t1 t12; +INSERT INTO t1 SELECT t11.a FROM t1 t11, t1 t12; +EXPLAIN SELECT a FROM t1 ORDER BY a; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 24492 +SELECT a FROM t1 ORDER BY a; +DROP TABLE t1; +CREATE TABLE t1(a CHAR(0) NOT NULL, b CHAR(0) NOT NULL, c int); +INSERT INTO t1 VALUES (0, 0, 0), (0, 0, 2), (0, 0, 1); +INSERT INTO t1 SELECT t11.a, t11.b, t11.c FROM t1 t11, t1 t12; +INSERT INTO t1 SELECT t11.a, t11.b, t11.c FROM t1 t11, t1 t12; +INSERT INTO t1 SELECT t11.a, t11.b, t11.c FROM t1 t11, t1 t12; +EXPLAIN SELECT a FROM t1 ORDER BY a LIMIT 5; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 24492 +SELECT a FROM t1 ORDER BY a LIMIT 5; +a + + + + + +EXPLAIN SELECT * FROM t1 ORDER BY a, b LIMIT 5; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 24492 +SELECT * FROM t1 ORDER BY a, b LIMIT 5; +a b c + 0 + 2 + 1 + 0 + 2 +EXPLAIN SELECT * FROM t1 ORDER BY a, b, c LIMIT 5; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 24492 Using filesort +SELECT * FROM t1 ORDER BY a, b, c LIMIT 5; +a b c + 0 + 0 + 0 + 0 + 0 +EXPLAIN SELECT * FROM t1 ORDER BY c, a LIMIT 5; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 24492 Using filesort +SELECT * FROM t1 ORDER BY c, a LIMIT 5; +a b c + 0 + 0 + 0 + 0 + 0 +SET @@sort_buffer_size= @old_sort_buffer_size; +DROP TABLE t1; +End of 5.0 tests +create table t1(a INT, KEY (a)); +INSERT INTO t1 VALUES (1),(2),(3),(4),(5); +SELECT a FROM t1 ORDER BY a LIMIT 2; +a +1 +2 +SELECT a FROM t1 ORDER BY a LIMIT 2,4294967296; +a +3 +4 +5 +SELECT a FROM t1 ORDER BY a LIMIT 2,4294967297; +a +3 +4 +5 +DROP TABLE t1; +CREATE TABLE A (date_key date); +CREATE TABLE C ( +pk int, +int_nokey int, +int_key int, +date_key date NOT NULL, +date_nokey date, +varchar_key varchar(1) +); +INSERT INTO C VALUES +(1,1,1,'0000-00-00',NULL,NULL), +(1,1,1,'0000-00-00',NULL,NULL); +SELECT 1 FROM C WHERE pk > ANY (SELECT 1 FROM C); +1 +SELECT COUNT(DISTINCT 1) FROM C +WHERE date_key = (SELECT 1 FROM A WHERE C.date_key IS NULL) GROUP BY pk; +COUNT(DISTINCT 1) +SELECT date_nokey FROM C +WHERE int_key IN (SELECT 1 FROM A) +HAVING date_nokey = '10:41:7' +ORDER BY date_key; +date_nokey +Warnings: +Warning 1292 Incorrect date value: '10:41:7' for column 'date_nokey' at row 1 +DROP TABLE A,C; +CREATE TABLE t1 (a INT NOT NULL, b INT); +INSERT INTO t1 VALUES (1, 1); +EXPLAIN EXTENDED SELECT * FROM t1 WHERE (a=a AND a=a) OR b > 2; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t1 system NULL NULL NULL NULL 1 100.00 +Warnings: +Note 1003 select '1' AS `a`,'1' AS `b` from `test`.`t1` where 1 +SELECT * FROM t1 WHERE (a=a AND a=a) OR b > 2; +a b +1 1 +DROP TABLE t1; +CREATE TABLE t1 (a INT NOT NULL, b INT NOT NULL, c INT NOT NULL); +EXPLAIN EXTENDED SELECT * FROM t1 WHERE (a=a AND b=b AND c=c) OR b > 20; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t1 system NULL NULL NULL NULL 0 0.00 const row not found +Warnings: +Note 1003 select '0' AS `a`,'0' AS `b`,'0' AS `c` from `test`.`t1` where 1 +EXPLAIN EXTENDED SELECT * FROM t1 WHERE (a=a AND a=a AND b=b) OR b > 20; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t1 system NULL NULL NULL NULL 0 0.00 const row not found +Warnings: +Note 1003 select '0' AS `a`,'0' AS `b`,'0' AS `c` from `test`.`t1` where 1 +EXPLAIN EXTENDED SELECT * FROM t1 WHERE (a=a AND b=b AND a=a) OR b > 20; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t1 system NULL NULL NULL NULL 0 0.00 const row not found +Warnings: +Note 1003 select '0' AS `a`,'0' AS `b`,'0' AS `c` from `test`.`t1` where 1 +DROP TABLE t1; +# +# Bug#45266: Uninitialized variable lead to an empty result. +# +drop table if exists A,AA,B,BB; +CREATE TABLE `A` ( +`pk` int(11) NOT NULL AUTO_INCREMENT, +`date_key` date NOT NULL, +`date_nokey` date NOT NULL, +`datetime_key` datetime NOT NULL, +`int_nokey` int(11) NOT NULL, +`time_key` time NOT NULL, +`time_nokey` time NOT NULL, +PRIMARY KEY (`pk`), +KEY `date_key` (`date_key`), +KEY `time_key` (`time_key`), +KEY `datetime_key` (`datetime_key`) +); +CREATE TABLE `AA` ( +`pk` int(11) NOT NULL AUTO_INCREMENT, +`int_nokey` int(11) NOT NULL, +`time_key` time NOT NULL, +KEY `time_key` (`time_key`), +PRIMARY KEY (`pk`) +); +CREATE TABLE `B` ( +`date_nokey` date NOT NULL, +`date_key` date NOT NULL, +`time_key` time NOT NULL, +`datetime_nokey` datetime NOT NULL, +`varchar_key` varchar(1) NOT NULL, +KEY `date_key` (`date_key`), +KEY `time_key` (`time_key`), +KEY `varchar_key` (`varchar_key`) +); +INSERT INTO `B` VALUES ('2003-07-28','2003-07-28','15:13:38','0000-00-00 00:00:00','f'),('0000-00-00','0000-00-00','00:05:48','2004-07-02 14:34:13','x'); +CREATE TABLE `BB` ( +`pk` int(11) NOT NULL AUTO_INCREMENT, +`int_nokey` int(11) NOT NULL, +`date_key` date NOT NULL, +`varchar_nokey` varchar(1) NOT NULL, +`date_nokey` date NOT NULL, +PRIMARY KEY (`pk`), +KEY `date_key` (`date_key`) +); +INSERT INTO `BB` VALUES (10,8,'0000-00-00','i','0000-00-00'),(11,0,'2005-08-18','','2005-08-18'); +SELECT table1 . `pk` AS field1 +FROM +(BB AS table1 INNER JOIN +(AA AS table2 STRAIGHT_JOIN A AS table3 +ON ( table3 . `date_key` = table2 . `pk` )) +ON ( table3 . `datetime_key` = table2 . `int_nokey` )) +WHERE ( table3 . `date_key` <= 4 AND table2 . `pk` = table1 . `varchar_nokey`) +GROUP BY field1 ; +field1 +SELECT table3 .`date_key` field1 +FROM +B table1 LEFT JOIN B table3 JOIN +(BB table6 JOIN A table7 ON table6 .`varchar_nokey`) +ON table6 .`int_nokey` ON table6 .`date_key` + WHERE NOT ( table1 .`varchar_key` AND table7 .`pk`) GROUP BY field1; +field1 +NULL +SELECT table4 . `time_nokey` AS field1 FROM +(AA AS table1 CROSS JOIN +(AA AS table2 STRAIGHT_JOIN +(B AS table3 STRAIGHT_JOIN A AS table4 +ON ( table4 . `date_key` = table3 . `time_key` )) +ON ( table4 . `pk` = table3 . `date_nokey` )) +ON ( table4 . `time_key` = table3 . `datetime_nokey` )) +WHERE ( table4 . `time_key` < table1 . `time_key` AND +table1 . `int_nokey` != 'f') +GROUP BY field1 ORDER BY field1 , field1; +field1 +SELECT table1 .`time_key` field2 FROM B table1 LEFT JOIN BB JOIN A table5 ON table5 .`date_nokey` ON table5 .`int_nokey` GROUP BY field2; +field2 +00:05:48 +15:13:38 +drop table A,AA,B,BB; +#end of test for bug#45266 +# +# BUG#48052: Valgrind warning - uninitialized value in init_read_record() +# +CREATE TABLE t1 ( +pk int(11) NOT NULL, +i int(11) DEFAULT NULL, +v varchar(1) DEFAULT NULL, +PRIMARY KEY (pk) +); +INSERT INTO t1 VALUES (2,7,'m'); +INSERT INTO t1 VALUES (3,9,'m'); +SELECT v +FROM t1 +WHERE NOT pk > 0 +HAVING v <= 't' +ORDER BY pk; +v +DROP TABLE t1; +# +# Bug#49489 Uninitialized cache led to a wrong result. +# +CREATE TABLE t1(c1 DOUBLE(5,4)); +INSERT INTO t1 VALUES (9.1234); +SELECT * FROM t1 WHERE c1 < 9.12345; +c1 +9.1234 +DROP TABLE t1; +# End of test for bug#49489. +# +# Bug #49517: Inconsistent behavior while using +# NULLable BIGINT and INT columns in comparison +# +CREATE TABLE t1(a BIGINT UNSIGNED NOT NULL, b BIGINT NULL, c INT NULL); +INSERT INTO t1 VALUES(105, NULL, NULL); +SELECT * FROM t1 WHERE b < 102; +a b c +SELECT * FROM t1 WHERE c < 102; +a b c +SELECT * FROM t1 WHERE 102 < b; +a b c +SELECT * FROM t1 WHERE 102 < c; +a b c +DROP TABLE t1; +End of 5.1 tests === modified file 'mysql-test/suite/funcs_1/r/is_columns_is.result' --- a/mysql-test/suite/funcs_1/r/is_columns_is.result 2010-04-02 10:03:39 +0000 +++ b/mysql-test/suite/funcs_1/r/is_columns_is.result 2010-04-06 02:08:10 +0000 @@ -230,6 +230,18 @@ NULL information_schema INNODB_TRX trx_s NULL information_schema INNODB_TRX trx_state 2 NO varchar 13 39 NULL NULL utf8 utf8_general_ci varchar(13) select NULL information_schema INNODB_TRX trx_wait_started 5 NULL YES datetime NULL NULL NULL NULL NULL NULL datetime select NULL information_schema INNODB_TRX trx_weight 6 0 NO bigint NULL NULL 19 0 NULL NULL bigint(21) unsigned select +NULL information_schema KEY_CACHES BLOCK_SIZE 5 0 NO bigint NULL NULL 19 0 NULL NULL bigint(21) unsigned select +NULL information_schema KEY_CACHES DIRTY_BLOCKS 8 0 NO bigint NULL NULL 19 0 NULL NULL bigint(21) unsigned select +NULL information_schema KEY_CACHES FULL_SIZE 4 0 NO bigint NULL NULL 19 0 NULL NULL bigint(21) unsigned select +NULL information_schema KEY_CACHES KEY_CACHE_NAME 1 NO varchar 192 576 NULL NULL utf8 utf8_general_ci varchar(192) select +NULL information_schema KEY_CACHES PARTITIONS 2 NULL YES int NULL NULL 10 0 NULL NULL int(3) unsigned select +NULL information_schema KEY_CACHES PARTITION_NUMBER 3 NULL YES int NULL NULL 10 0 NULL NULL int(3) unsigned select +NULL information_schema KEY_CACHES READS 10 0 NO bigint NULL NULL 19 0 NULL NULL bigint(21) unsigned select +NULL information_schema KEY_CACHES READ_REQUESTS 9 0 NO bigint NULL NULL 19 0 NULL NULL bigint(21) unsigned select +NULL information_schema KEY_CACHES UNUSED_BLOCKS 7 0 NO bigint NULL NULL 19 0 NULL NULL bigint(21) unsigned select +NULL information_schema KEY_CACHES USED_BLOCKS 6 0 NO bigint NULL NULL 19 0 NULL NULL bigint(21) unsigned select +NULL information_schema KEY_CACHES WRITES 12 0 NO bigint NULL NULL 19 0 NULL NULL bigint(21) unsigned select +NULL information_schema KEY_CACHES WRITE_REQUESTS 11 0 NO bigint NULL NULL 19 0 NULL NULL bigint(21) unsigned select NULL information_schema KEY_COLUMN_USAGE COLUMN_NAME 7 NO varchar 64 192 NULL NULL utf8 utf8_general_ci varchar(64) select NULL information_schema KEY_COLUMN_USAGE CONSTRAINT_CATALOG 1 NULL YES varchar 512 1536 NULL NULL utf8 utf8_general_ci varchar(512) select NULL information_schema KEY_COLUMN_USAGE CONSTRAINT_NAME 3 NO varchar 64 192 NULL NULL utf8 utf8_general_ci varchar(64) select @@ -743,6 +755,18 @@ NULL information_schema INNODB_TRX trx_w NULL information_schema INNODB_TRX trx_weight bigint NULL NULL NULL NULL bigint(21) unsigned NULL information_schema INNODB_TRX trx_mysql_thread_id bigint NULL NULL NULL NULL bigint(21) unsigned 3.0000 information_schema INNODB_TRX trx_query varchar 1024 3072 utf8 utf8_general_ci varchar(1024) +3.0000 information_schema KEY_CACHES KEY_CACHE_NAME varchar 192 576 utf8 utf8_general_ci varchar(192) +NULL information_schema KEY_CACHES PARTITIONS int NULL NULL NULL NULL int(3) unsigned +NULL information_schema KEY_CACHES PARTITION_NUMBER int NULL NULL NULL NULL int(3) unsigned +NULL information_schema KEY_CACHES FULL_SIZE bigint NULL NULL NULL NULL bigint(21) unsigned +NULL information_schema KEY_CACHES BLOCK_SIZE bigint NULL NULL NULL NULL bigint(21) unsigned +NULL information_schema KEY_CACHES USED_BLOCKS bigint NULL NULL NULL NULL bigint(21) unsigned +NULL information_schema KEY_CACHES UNUSED_BLOCKS bigint NULL NULL NULL NULL bigint(21) unsigned +NULL information_schema KEY_CACHES DIRTY_BLOCKS bigint NULL NULL NULL NULL bigint(21) unsigned +NULL information_schema KEY_CACHES READ_REQUESTS bigint NULL NULL NULL NULL bigint(21) unsigned +NULL information_schema KEY_CACHES READS bigint NULL NULL NULL NULL bigint(21) unsigned +NULL information_schema KEY_CACHES WRITE_REQUESTS bigint NULL NULL NULL NULL bigint(21) unsigned +NULL information_schema KEY_CACHES WRITES bigint NULL NULL NULL NULL bigint(21) unsigned 3.0000 information_schema KEY_COLUMN_USAGE CONSTRAINT_CATALOG varchar 512 1536 utf8 utf8_general_ci varchar(512) 3.0000 information_schema KEY_COLUMN_USAGE CONSTRAINT_SCHEMA varchar 64 192 utf8 utf8_general_ci varchar(64) 3.0000 information_schema KEY_COLUMN_USAGE CONSTRAINT_NAME varchar 64 192 utf8 utf8_general_ci varchar(64) === modified file 'mysql-test/suite/funcs_1/r/is_tables_is.result' --- a/mysql-test/suite/funcs_1/r/is_tables_is.result 2010-02-01 06:14:12 +0000 +++ b/mysql-test/suite/funcs_1/r/is_tables_is.result 2010-04-06 02:08:10 +0000 @@ -590,6 +590,29 @@ user_comment Separator ----------------------------------------------------- TABLE_CATALOG NULL TABLE_SCHEMA information_schema +TABLE_NAME KEY_CACHES +TABLE_TYPE SYSTEM VIEW +ENGINE MEMORY +VERSION 10 +ROW_FORMAT Fixed +TABLE_ROWS #TBLR# +AVG_ROW_LENGTH #ARL# +DATA_LENGTH #DL# +MAX_DATA_LENGTH #MDL# +INDEX_LENGTH #IL# +DATA_FREE #DF# +AUTO_INCREMENT NULL +CREATE_TIME #CRT# +UPDATE_TIME #UT# +CHECK_TIME #CT# +TABLE_COLLATION utf8_general_ci +CHECKSUM NULL +CREATE_OPTIONS #CO# +TABLE_COMMENT #TC# +user_comment +Separator ----------------------------------------------------- +TABLE_CATALOG NULL +TABLE_SCHEMA information_schema TABLE_NAME KEY_COLUMN_USAGE TABLE_TYPE SYSTEM VIEW ENGINE MEMORY @@ -1688,6 +1711,29 @@ user_comment Separator ----------------------------------------------------- TABLE_CATALOG NULL TABLE_SCHEMA information_schema +TABLE_NAME KEY_CACHES +TABLE_TYPE SYSTEM VIEW +ENGINE MEMORY +VERSION 10 +ROW_FORMAT Fixed +TABLE_ROWS #TBLR# +AVG_ROW_LENGTH #ARL# +DATA_LENGTH #DL# +MAX_DATA_LENGTH #MDL# +INDEX_LENGTH #IL# +DATA_FREE #DF# +AUTO_INCREMENT NULL +CREATE_TIME #CRT# +UPDATE_TIME #UT# +CHECK_TIME #CT# +TABLE_COLLATION utf8_general_ci +CHECKSUM NULL +CREATE_OPTIONS #CO# +TABLE_COMMENT #TC# +user_comment +Separator ----------------------------------------------------- +TABLE_CATALOG NULL +TABLE_SCHEMA information_schema TABLE_NAME KEY_COLUMN_USAGE TABLE_TYPE SYSTEM VIEW ENGINE MEMORY === modified file 'mysql-test/suite/pbxt/r/mysqlshow.result' --- a/mysql-test/suite/pbxt/r/mysqlshow.result 2010-02-01 06:14:12 +0000 +++ b/mysql-test/suite/pbxt/r/mysqlshow.result 2010-03-31 18:45:41 +0000 @@ -91,6 +91,7 @@ Database: information_schema | GLOBAL_STATUS | | GLOBAL_VARIABLES | | INDEX_STATISTICS | +| KEY_CACHES | | KEY_COLUMN_USAGE | | PARTITIONS | | PLUGINS | @@ -144,6 +145,7 @@ Database: INFORMATION_SCHEMA | GLOBAL_STATUS | | GLOBAL_VARIABLES | | INDEX_STATISTICS | +| KEY_CACHES | | KEY_COLUMN_USAGE | | PARTITIONS | | PLUGINS | === modified file 'mysql-test/t/key_cache.test' --- a/mysql-test/t/key_cache.test 2008-03-27 16:43:17 +0000 +++ b/mysql-test/t/key_cache.test 2010-04-01 21:42:40 +0000 @@ -1,11 +1,13 @@ # -# Test of multiple key caches +# Test of multiple key caches, simple an partitioned # --disable_warnings drop table if exists t1, t2, t3; --enable_warnings -SET @save_key_buffer=@@key_buffer_size; +SET @save_key_buffer_size=@@key_buffer_size; +SET @save_key_cache_block_size=@@key_cache_block_size; +SET @save_key_cache_partitions=@@key_cache_partitions; SELECT @@key_buffer_size, @@small.key_buffer_size; @@ -33,7 +35,7 @@ SELECT @@`default`.key_buffer_size; SELECT @@small.key_buffer_size; SELECT @@medium.key_buffer_size; -SET @@global.key_buffer_size=@save_key_buffer; +SET @@global.key_buffer_size=@save_key_buffer_size; # # Errors @@ -247,3 +249,270 @@ SET GLOBAL key_cache_block_size= @bug284 DROP TABLE t1; # End of 4.1 tests + +# +# Test cases for partitioned key caches +# + +# Test usage of the KEY_CACHE table from information schema +# for a simple key cache + +set global key_buffer_size=@save_key_buffer_size; +set global key_cache_block_size=@save_key_cache_block_size; +select @@key_buffer_size; +select @@key_cache_block_size; +select @@key_cache_partitions; + +create table t1 ( + p int not null auto_increment primary key, + a char(10)); +create table t2 ( + p int not null auto_increment primary key, + i int, a char(10), key k1(i), key k2(a)); + +select @@key_cache_partitions; +--replace_column 7 # +select * from information_schema.key_caches where partition_number is null; + +insert into t1 values (1, 'qqqq'), (2, 'yyyy'); +insert into t2 values (1, 1, 'qqqq'), (2, 1, 'pppp'), + (3, 1, 'yyyy'), (4, 3, 'zzzz'); +select * from t1; +select * from t2; +update t1 set p=3 where p=1; +update t2 set i=2 where i=1; + +--replace_result 1808 KEY_BLOCKS_UNUSED 1670 KEY_BLOCKS_UNUSED +show status like 'key_%'; +--replace_column 7 # +select * from information_schema.key_caches where partition_number is null; + +delete from t2 where a='zzzz'; +--replace_column 7 # +select * from information_schema.key_caches where partition_number is null; + +delete from t1; +delete from t2; +--replace_column 7 # +select * from information_schema.key_caches where partition_number is null; + +# For the key cache with 2 partitions execute the same sequence of +# statements as for the simple cache above. +# The statistical information on the number of i/o requests and +# the number of is expected to be the same. + +set global key_cache_partitions=2; +select @@key_cache_partitions; +--replace_column 7 # +select * from information_schema.key_caches where partition_number is null; + +insert into t1 values (1, 'qqqq'), (2, 'yyyy'); +insert into t2 values (1, 1, 'qqqq'), (2, 1, 'pppp'), + (3, 1, 'yyyy'), (4, 3, 'zzzz'); +select * from t1; +select * from t2; +update t1 set p=3 where p=1; +update t2 set i=2 where i=1; + +--replace_result 1808 KEY_BLOCKS_UNUSED 1670 KEY_BLOCKS_UNUSED +show status like 'key_%'; +--replace_column 7 # +select * from information_schema.key_caches where partition_number is null; + +delete from t1; +delete from t2; +--replace_column 7 # +select * from information_schema.key_caches where partition_number is null; + +# Check that we can work with one partition with the same results + +set global key_cache_partitions=1; +select @@key_cache_partitions; +--replace_column 7 # +select * from information_schema.key_caches where partition_number is null; + +insert into t1 values (1, 'qqqq'), (2, 'yyyy'); +insert into t2 values (1, 1, 'qqqq'), (2, 1, 'pppp'), + (3, 1, 'yyyy'), (4, 3, 'zzzz'); +select * from t1; +select * from t2; +update t1 set p=3 where p=1; +update t2 set i=2 where i=1; + +--replace_result 1808 KEY_BLOCKS_UNUSED 1670 KEY_BLOCKS_UNUSED +show status like 'key_%'; +--replace_column 7 # +select * from information_schema.key_caches where partition_number is null; + +delete from t1; +delete from t2; +--replace_column 7 # +select * from information_schema.key_caches where partition_number is null; + +flush tables; flush status; +--replace_column 7 # +select * from information_schema.key_caches where partition_number is null; + +# Switch back to 2 partitions + +set global key_buffer_size=32*1024; +select @@key_buffer_size; +set global key_cache_partitions=2; +select @@key_cache_partitions; +--replace_column 7 # +select * from information_schema.key_caches where partition_number is null; + +insert into t1 values (1, 'qqqq'), (2, 'yyyy'); +insert into t2 values (1, 1, 'qqqq'), (2, 1, 'pppp'), + (3, 1, 'yyyy'), (4, 3, 'zzzz'); +select * from t1; +select * from t2; +update t1 set p=3 where p=1; +update t2 set i=2 where i=1; + +--replace_column 7 # +select * from information_schema.key_caches where partition_number is null; + +# Add more rows to tables t1 and t2 + +insert into t1(a) select a from t1; +insert into t1(a) select a from t1; +insert into t1(a) select a from t1; +insert into t1(a) select a from t1; +insert into t1(a) select a from t1; +insert into t1(a) select a from t1; +insert into t1(a) select a from t1; +insert into t1(a) select a from t1; + +insert into t2(i,a) select i,a from t2; +insert into t2(i,a) select i,a from t2; +insert into t2(i,a) select i,a from t2; +insert into t2(i,a) select i,a from t2; +insert into t2(i,a) select i,a from t2; +insert into t2(i,a) select i,a from t2; +insert into t2(i,a) select i,a from t2; +insert into t2(i,a) select i,a from t2; + +--replace_column 6 # 7 # 10 # +select * from information_schema.key_caches where partition_number is null; + +select * from t1 where p between 1010 and 1020 ; +select * from t2 where p between 1010 and 1020 ; +--replace_column 6 # 7 # 10 # +select * from information_schema.key_caches where partition_number is null; + +flush tables; flush status; +update t1 set a='zzzz' where a='qqqq'; +update t2 set i=1 where i=2; +--replace_column 6 # 7 # +select * from information_schema.key_caches where partition_number is null; + +# Now test how we can work with 7 partitions + +set global keycache1.key_buffer_size=256*1024; +select @@keycache1.key_buffer_size; +set global keycache1.key_cache_partitions=7; +select @@keycache1.key_cache_partitions; + +--replace_column 6 # 7 # +select * from information_schema.key_caches where partition_number is null; +--replace_column 7 # +select * from information_schema.key_caches where key_cache_name like "key%" + and partition_number is null; + +cache index t1 key (`primary`) in keycache1; + +explain select p from t1 where p between 1010 and 1020; +select p from t1 where p between 1010 and 1020; +explain select i from t2 where p between 1010 and 1020; +select i from t2 where p between 1010 and 1020; +explain select count(*) from t1, t2 where t1.p = t2.i; +select count(*) from t1, t2 where t1.p = t2.i; + +--replace_column 6 # 7 # +select * from information_schema.key_caches where partition_number is null; +--replace_column 7 # +select * from information_schema.key_caches where key_cache_name like "key%" + and partition_number is null; + +cache index t2 in keycache1; +update t2 set p=p+3000, i=2 where a='qqqq'; +--replace_column 7 # +select * from information_schema.key_caches where key_cache_name like "key%" + and partition_number is null; + +set global keycache2.key_buffer_size=1024*1024; +cache index t2 in keycache2; +insert into t2 values (2000, 3, 'yyyy'); +--replace_column 7 # +select * from information_schema.key_caches where key_cache_name like "keycache2" + and partition_number is null; +--replace_column 7 # +select * from information_schema.key_caches where key_cache_name like "key%" + and partition_number is null; + +cache index t2 in keycache1; +update t2 set p=p+5000 where a='zzzz'; +select * from t2 where p between 1010 and 1020; +explain select p from t2 where p between 1010 and 1020; +select p from t2 where p between 1010 and 1020; +explain select i from t2 where a='yyyy' and i=3; +select i from t2 where a='yyyy' and i=3; +explain select a from t2 where a='yyyy' and i=3; +select a from t2 where a='yyyy' and i=3 ; +--replace_column 6 # 7 # +select * from information_schema.key_caches where partition_number is null; + +set global keycache1.key_cache_block_size=2*1024; +insert into t2 values (7000, 3, 'yyyy'); +--replace_column 6 # 7 # +select * from information_schema.key_caches where partition_number is null; + +set global keycache1.key_cache_block_size=8*1024; +--replace_column 6 # 7 # +select * from information_schema.key_caches where partition_number is null; +insert into t2 values (8000, 3, 'yyyy'); +--replace_column 6 # 7 # +select * from information_schema.key_caches where partition_number is null; + +set global keycache1.key_buffer_size=64*1024; +--replace_column 6 # 7 # +select * from information_schema.key_caches where partition_number is null; + +set global keycache1.key_cache_block_size=2*1024; +--replace_column 6 # 7 # +select * from information_schema.key_caches where partition_number is null; + +set global keycache1.key_cache_block_size=8*1024; +--replace_column 6 # 7 # +select * from information_schema.key_caches where partition_number is null; + +set global keycache1.key_buffer_size=0; +--replace_column 6 # 7 # +select * from information_schema.key_caches where partition_number is null; + +set global keycache1.key_cache_block_size=8*1024; +--replace_column 6 # 7 # +select * from information_schema.key_caches where partition_number is null; + +set global keycache1.key_buffer_size=0; +--replace_column 6 # 7 # +select * from information_schema.key_caches where partition_number is null; + +set global keycache1.key_buffer_size=128*1024; +--replace_column 6 # 7 # +select * from information_schema.key_caches where partition_number is null; + +set global keycache1.key_cache_block_size=1024; +--replace_column 6 # 7 # +select * from information_schema.key_caches where partition_number is null; + +drop table t1,t2; + +set global keycache1.key_buffer_size=0; +set global keycache2.key_buffer_size=0; + +set global key_buffer_size=@save_key_buffer_size; +set global key_cache_partitions=@save_key_cache_partitions; + +#End of 5.1 tests === added file 'mysql-test/t/select_pkeycache-master.opt' --- a/mysql-test/t/select_pkeycache-master.opt 1970-01-01 00:00:00 +0000 +++ b/mysql-test/t/select_pkeycache-master.opt 2010-02-16 16:41:11 +0000 @@ -0,0 +1 @@ +--key_cache_partitions=7 === added file 'mysql-test/t/select_pkeycache.test' --- a/mysql-test/t/select_pkeycache.test 1970-01-01 00:00:00 +0000 +++ b/mysql-test/t/select_pkeycache.test 2010-02-16 16:41:11 +0000 @@ -0,0 +1,8 @@ + +# +# Run select.test partitioned default key cache (with 7 partitions) +# (see setting the number of partitions in select_pkecache-master.opt) +# The result is expected the same as for select.test +# + +--source t/select.test === modified file 'mysys/mf_keycache.c' --- a/mysys/mf_keycache.c 2010-03-30 12:36:49 +0000 +++ b/mysys/mf_keycache.c 2010-04-06 02:08:10 +0000 @@ -13,12 +13,43 @@ along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ + + /** - @file + @file + The file contains the following modules: + + Simple Key Cache Module + + Partitioned Key Cache Module + + Key Cache Interface Module + +*/ + +#include "mysys_priv.h" +#include "mysys_err.h" +#include <keycache.h> +#include "my_static.h" +#include <m_string.h> +#include <my_bit.h> +#include <errno.h> +#include <stdarg.h> + +/****************************************************************************** + Simple Key Cache Module + + The module contains implementations of all key cache interface functions + employed by partitioned key caches. + +******************************************************************************/ + +/* These functions handle keyblock cacheing for ISAM and MyISAM tables. One cache can handle many files. It must contain buffers of the same blocksize. + init_key_cache() should be used to init cache handler. The free list (free_block_list) is a stack like structure. @@ -37,9 +68,7 @@ blocks_unused is the sum of never used blocks in the pool and of currently free blocks. blocks_used is the number of blocks fetched from the pool and as such gives the maximum number of in-use blocks at any time. -*/ -/* Key Cache Locking ================= @@ -104,14 +133,77 @@ I/O finished. */ -#include "mysys_priv.h" -#include "mysys_err.h" -#include <keycache.h> -#include "my_static.h" -#include <m_string.h> -#include <my_bit.h> -#include <errno.h> -#include <stdarg.h> +/* declare structures that is used by st_key_cache */ + +struct st_block_link; +typedef struct st_block_link BLOCK_LINK; +struct st_keycache_page; +typedef struct st_keycache_page KEYCACHE_PAGE; +struct st_hash_link; +typedef struct st_hash_link HASH_LINK; + +/* info about requests in a waiting queue */ +typedef struct st_keycache_wqueue +{ + struct st_my_thread_var *last_thread; /* circular list of waiting threads */ +} KEYCACHE_WQUEUE; + +#define CHANGED_BLOCKS_HASH 128 /* must be power of 2 */ + +/* Control block for a simple (non-partitioned) key cache */ + +typedef struct st_simple_key_cache_cb +{ + my_bool key_cache_inited; /* <=> control block is allocated */ + my_bool in_resize; /* true during resize operation */ + my_bool resize_in_flush; /* true during flush of resize operation */ + my_bool can_be_used; /* usage of cache for read/write is allowed */ + size_t key_cache_mem_size; /* specified size of the cache memory */ + uint key_cache_block_size; /* size of the page buffer of a cache block */ + ulong min_warm_blocks; /* min number of warm blocks; */ + ulong age_threshold; /* age threshold for hot blocks */ + ulonglong keycache_time; /* total number of block link operations */ + uint hash_entries; /* max number of entries in the hash table */ + int hash_links; /* max number of hash links */ + int hash_links_used; /* number of hash links currently used */ + int disk_blocks; /* max number of blocks in the cache */ + ulong blocks_used; /* maximum number of concurrently used blocks */ + ulong blocks_unused; /* number of currently unused blocks */ + ulong blocks_changed; /* number of currently dirty blocks */ + ulong warm_blocks; /* number of blocks in warm sub-chain */ + ulong cnt_for_resize_op; /* counter to block resize operation */ + long blocks_available; /* number of blocks available in the LRU chain */ + HASH_LINK **hash_root; /* arr. of entries into hash table buckets */ + HASH_LINK *hash_link_root; /* memory for hash table links */ + HASH_LINK *free_hash_list; /* list of free hash links */ + BLOCK_LINK *free_block_list; /* list of free blocks */ + BLOCK_LINK *block_root; /* memory for block links */ + uchar HUGE_PTR *block_mem; /* memory for block buffers */ + BLOCK_LINK *used_last; /* ptr to the last block of the LRU chain */ + BLOCK_LINK *used_ins; /* ptr to the insertion block in LRU chain */ + pthread_mutex_t cache_lock; /* to lock access to the cache structure */ + KEYCACHE_WQUEUE resize_queue; /* threads waiting during resize operation */ + /* + Waiting for a zero resize count. Using a queue for symmetry though + only one thread can wait here. + */ + KEYCACHE_WQUEUE waiting_for_resize_cnt; + KEYCACHE_WQUEUE waiting_for_hash_link; /* waiting for a free hash link */ + KEYCACHE_WQUEUE waiting_for_block; /* requests waiting for a free block */ + BLOCK_LINK *changed_blocks[CHANGED_BLOCKS_HASH]; /* hash for dirty file bl.*/ + BLOCK_LINK *file_blocks[CHANGED_BLOCKS_HASH]; /* hash for other file bl.*/ + + /* Statistics variables. These are reset in reset_key_cache_counters(). */ + ulong global_blocks_changed; /* number of currently dirty blocks */ + ulonglong global_cache_w_requests;/* number of write requests (write hits) */ + ulonglong global_cache_write; /* number of writes from cache to files */ + ulonglong global_cache_r_requests;/* number of read requests (read hits) */ + ulonglong global_cache_read; /* number of reads from files to cache */ + + int blocks; /* max number of blocks in the cache */ + uint hash_factor; /* factor used to calculate hash function */ + my_bool in_init; /* Set to 1 in MySQL during init/resize */ +} SIMPLE_KEY_CACHE_CB; /* Some compilation flags have been added specifically for this module @@ -223,7 +315,8 @@ KEY_CACHE *dflt_key_cache= &dflt_key_cac #define FLUSH_CACHE 2000 /* sort this many blocks at once */ -static int flush_all_key_blocks(KEY_CACHE *keycache); +static int flush_all_key_blocks(SIMPLE_KEY_CACHE_CB *keycache); +static void end_simple_key_cache(SIMPLE_KEY_CACHE_CB *keycache, my_bool cleanup); #ifdef THREAD static void wait_on_queue(KEYCACHE_WQUEUE *wqueue, pthread_mutex_t *mutex); @@ -232,15 +325,16 @@ static void release_whole_queue(KEYCACHE #define wait_on_queue(wqueue, mutex) do {} while (0) #define release_whole_queue(wqueue) do {} while (0) #endif -static void free_block(KEY_CACHE *keycache, BLOCK_LINK *block); +static void free_block(SIMPLE_KEY_CACHE_CB *keycache, BLOCK_LINK *block); #if !defined(DBUG_OFF) -static void test_key_cache(KEY_CACHE *keycache, +static void test_key_cache(SIMPLE_KEY_CACHE_CB *keycache, const char *where, my_bool lock); #endif - +#define KEYCACHE_BASE_EXPR(f, pos) \ + ((ulong) ((pos) / keycache->key_cache_block_size) + (ulong) (f)) #define KEYCACHE_HASH(f, pos) \ -(((ulong) ((pos) / keycache->key_cache_block_size) + \ - (ulong) (f)) & (keycache->hash_entries-1)) + ((KEYCACHE_BASE_EXPR(f, pos) / keycache->hash_factor) & \ + (keycache->hash_entries-1)) #define FILE_HASH(f) ((uint) (f) & (CHANGED_BLOCKS_HASH-1)) #define DEFAULT_KEYCACHE_DEBUG_LOG "keycache_debug.log" @@ -336,9 +430,10 @@ static int keycache_pthread_cond_signal( #define inline /* disabled inline for easier debugging */ static int fail_block(BLOCK_LINK *block); static int fail_hlink(HASH_LINK *hlink); -static int cache_empty(KEY_CACHE *keycache); +static int cache_empty(SIMPLE_KEY_CACHE_CB *keycache); #endif + static inline uint next_power(uint value) { return (uint) my_round_up_to_next_power((uint32) value) << 1; @@ -346,19 +441,32 @@ static inline uint next_power(uint value /* - Initialize a key cache + Initialize a simple key cache SYNOPSIS - init_key_cache() - keycache pointer to a key cache data structure - key_cache_block_size size of blocks to keep cached data - use_mem total memory to use for the key cache - division_limit division limit (may be zero) - age_threshold age threshold (may be zero) + init_simple_key_cache() + keycache pointer to the control block of a simple key cache + key_cache_block_size size of blocks to keep cached data + use_mem memory to use for the key cache buferrs/structures + division_limit division limit (may be zero) + age_threshold age threshold (may be zero) + + DESCRIPTION + This function is the implementation of the init_key_cache interface + function that is employed by simple (non-partitioned) key caches. + The function builds a simple key cache and initializes the control block + structure of the type SIMPLE_KEY_CACHE_CB that is used for this key cache. + The parameter keycache is supposed to point to this structure. + The parameter key_cache_block_size specifies the size of the blocks in + the key cache to be built. The parameters division_limit and age_threshhold + determine the initial values of those characteristics of the key cache + that are used for midpoint insertion strategy. The parameter use_mem + specifies the total amount of memory to be allocated for key cache blocks + and auxiliary structures. RETURN VALUE number of blocks in the key cache, if successful, - 0 - otherwise. + <= 0 - otherwise. NOTES. if keycache->key_cache_inited != 0 we assume that the key cache @@ -367,17 +475,17 @@ static inline uint next_power(uint value It's assumed that no two threads call this function simultaneously referring to the same key cache handle. - */ -int init_key_cache(KEY_CACHE *keycache, uint key_cache_block_size, - size_t use_mem, uint division_limit, - uint age_threshold) +static +int init_simple_key_cache(SIMPLE_KEY_CACHE_CB *keycache, uint key_cache_block_size, + size_t use_mem, uint division_limit, + uint age_threshold) { ulong blocks, hash_links; size_t length; int error; - DBUG_ENTER("init_key_cache"); + DBUG_ENTER("init_simple_key_cache"); DBUG_ASSERT(key_cache_block_size >= 512); KEYCACHE_DEBUG_OPEN; @@ -387,12 +495,15 @@ int init_key_cache(KEY_CACHE *keycache, DBUG_RETURN(0); } + keycache->blocks_used= keycache->blocks_unused= 0; + keycache->global_blocks_changed= 0; keycache->global_cache_w_requests= keycache->global_cache_r_requests= 0; keycache->global_cache_read= keycache->global_cache_write= 0; keycache->disk_blocks= -1; if (! keycache->key_cache_inited) { keycache->key_cache_inited= 1; + keycache->hash_factor= 1; /* Initialize these variables once only. Their value must survive re-initialization during resizing. @@ -534,51 +645,42 @@ err: /* - Resize a key cache + Prepare for resizing a simple key cache SYNOPSIS - resize_key_cache() - keycache pointer to a key cache data structure - key_cache_block_size size of blocks to keep cached data - use_mem total memory to use for the new key cache - division_limit new division limit (if not zero) - age_threshold new age threshold (if not zero) - - RETURN VALUE - number of blocks in the key cache, if successful, - 0 - otherwise. + prepare_resize_simple_key_cache() + keycache pointer to the control block of a simple key cache + with_resize_queue <=> resize queue is used + release_lock <=> release the key cache lock before return - NOTES. - The function first compares the memory size and the block size parameters - with the key cache values. + DESCRIPTION + This function flushes all dirty pages from a simple key cache and after + this it destroys the key cache calling end_simple_key_cache. The function + takes the parameter keycache as a pointer to the control block + structure of the type SIMPLE_KEY_CACHE_CB for this key cache. + The parameter with_resize_queue determines weather the resize queue is + involved (MySQL server never uses this queue). The parameter release_lock + says weather the key cache lock must be released before return from + the function. - If they differ the function free the the memory allocated for the - old key cache blocks by calling the end_key_cache function and - then rebuilds the key cache with new blocks by calling - init_key_cache. + RETURN VALUE + 0 - on success, + 1 - otherwise. - The function starts the operation only when all other threads - performing operations with the key cache let her to proceed - (when cnt_for_resize=0). + NOTES + This function is the called by resize_simple_key_cache and + resize_partitioned_key_cache that resize simple and partitioned key caches + respectively. */ -int resize_key_cache(KEY_CACHE *keycache, uint key_cache_block_size, - size_t use_mem, uint division_limit, - uint age_threshold) +static +int prepare_resize_simple_key_cache(SIMPLE_KEY_CACHE_CB *keycache, + my_bool with_resize_queue, + my_bool release_lock) { - int blocks; - DBUG_ENTER("resize_key_cache"); - - if (!keycache->key_cache_inited) - DBUG_RETURN(keycache->disk_blocks); - - if(key_cache_block_size == keycache->key_cache_block_size && - use_mem == keycache->key_cache_mem_size) - { - change_key_cache_param(keycache, division_limit, age_threshold); - DBUG_RETURN(keycache->disk_blocks); - } - + int res= 0; + DBUG_ENTER("prepare_resize_simple_key_cache"); + keycache_pthread_mutex_lock(&keycache->cache_lock); #ifdef THREAD @@ -588,7 +690,7 @@ int resize_key_cache(KEY_CACHE *keycache one resizer only. In set_var.cc keycache->in_init is used to block multiple attempts. */ - while (keycache->in_resize) + while (with_resize_queue && keycache->in_resize) { /* purecov: begin inspected */ wait_on_queue(&keycache->resize_queue, &keycache->cache_lock); @@ -613,8 +715,8 @@ int resize_key_cache(KEY_CACHE *keycache { /* TODO: if this happens, we should write a warning in the log file ! */ keycache->resize_in_flush= 0; - blocks= 0; keycache->can_be_used= 0; + res= 1; goto finish; } DBUG_ASSERT(cache_empty(keycache)); @@ -640,29 +742,144 @@ int resize_key_cache(KEY_CACHE *keycache #else KEYCACHE_DBUG_ASSERT(keycache->cnt_for_resize_op == 0); #endif - - /* - Free old cache structures, allocate new structures, and initialize - them. Note that the cache_lock mutex and the resize_queue are left - untouched. We do not lose the cache_lock and will release it only at - the end of this function. - */ - end_key_cache(keycache, 0); /* Don't free mutex */ - /* The following will work even if use_mem is 0 */ - blocks= init_key_cache(keycache, key_cache_block_size, use_mem, - division_limit, age_threshold); + + end_simple_key_cache(keycache, 0); finish: + if (release_lock) + keycache_pthread_mutex_unlock(&keycache->cache_lock); + DBUG_RETURN(res); +} + + +/* + Finalize resizing a simple key cache + + SYNOPSIS + finish_resize_simple_key_cache() + keycache pointer to the control block of a simple key cache + with_resize_queue <=> resize queue is used + acquire_lock <=> acquire the key cache lock at start + + DESCRIPTION + This function performs finalizing actions for the operation of + resizing a simple key cache. The function takes the parameter + keycache as a pointer to the control block structure of the type + SIMPLE_KEY_CACHE_CB for this key cache. The function sets the flag + in_resize in this structure to FALSE. + The parameter with_resize_queue determines weather the resize queue + is involved (MySQL server never uses this queue). + The parameter acquire_lock says weather the key cache lock must be + acquired at the start of the function. + + RETURN VALUE + none + + NOTES + This function is the called by resize_simple_key_cache and + resize_partitioned_key_cache that resize simple and partitioned key caches + respectively. +*/ + +static +void finish_resize_simple_key_cache(SIMPLE_KEY_CACHE_CB *keycache, + my_bool with_resize_queue, + my_bool acquire_lock) +{ + DBUG_ENTER("finish_resize_simple_key_cache"); + + if (acquire_lock) + keycache_pthread_mutex_lock(&keycache->cache_lock); + + safe_mutex_assert_owner(&keycache->cache_lock); + /* Mark the resize finished. This allows other threads to start a resize or to request new cache blocks. */ keycache->in_resize= 0; - - /* Signal waiting threads. */ - release_whole_queue(&keycache->resize_queue); + + if (with_resize_queue) + { + /* Signal waiting threads. */ + release_whole_queue(&keycache->resize_queue); + } keycache_pthread_mutex_unlock(&keycache->cache_lock); + + DBUG_VOID_RETURN; +} + + +/* + Resize a simple key cache + + SYNOPSIS + resize_simple_key_cache() + keycache pointer to the control block of a simple key cache + key_cache_block_size size of blocks to keep cached data + use_mem memory to use for the key cache buffers/structures + division_limit new division limit (if not zero) + age_threshold new age threshold (if not zero) + + DESCRIPTION + This function is the implementation of the resize_key_cache interface + function that is employed by simple (non-partitioned) key caches. + The function takes the parameter keycache as a pointer to the + control block structure of the type SIMPLE_KEY_CACHE_CB for the simple key + cache to be resized. + The parameter key_cache_block_size specifies the new size of the blocks in + the key cache. The parameters division_limit and age_threshold + determine the new initial values of those characteristics of the key cache + that are used for midpoint insertion strategy. The parameter use_mem + specifies the total amount of memory to be allocated for key cache blocks + and auxiliary structures in the new key cache. + + RETURN VALUE + number of blocks in the key cache, if successful, + 0 - otherwise. + + NOTES. + The function first calls the function prepare_resize_simple_key_cache + to flush all dirty blocks from key cache, to free memory used + for key cache blocks and auxiliary structures. After this the + function builds a new key cache with new parameters. + + This implementation doesn't block the calls and executions of other + functions from the key cache interface. However it assumes that the + calls of resize_simple_key_cache itself are serialized. + + The function starts the operation only when all other threads + performing operations with the key cache let her to proceed + (when cnt_for_resize=0). +*/ + +static +int resize_simple_key_cache(SIMPLE_KEY_CACHE_CB *keycache, uint key_cache_block_size, + size_t use_mem, uint division_limit, + uint age_threshold) +{ + int blocks= 0; + DBUG_ENTER("resize_simple_key_cache"); + + if (!keycache->key_cache_inited) + DBUG_RETURN(blocks); + + /* + Note that the cache_lock mutex and the resize_queue are left untouched. + We do not lose the cache_lock and will release it only at the end of + this function. + */ + if (prepare_resize_simple_key_cache(keycache, 1, 0)) + goto finish; + + /* The following will work even if use_mem is 0 */ + blocks= init_simple_key_cache(keycache, key_cache_block_size, use_mem, + division_limit, age_threshold); + +finish: + finish_resize_simple_key_cache(keycache, 1, 0); + DBUG_RETURN(blocks); } @@ -670,7 +887,7 @@ finish: /* Increment counter blocking resize key cache operation */ -static inline void inc_counter_for_resize_op(KEY_CACHE *keycache) +static inline void inc_counter_for_resize_op(SIMPLE_KEY_CACHE_CB *keycache) { keycache->cnt_for_resize_op++; } @@ -680,35 +897,47 @@ static inline void inc_counter_for_resiz Decrement counter blocking resize key cache operation; Signal the operation to proceed when counter becomes equal zero */ -static inline void dec_counter_for_resize_op(KEY_CACHE *keycache) +static inline void dec_counter_for_resize_op(SIMPLE_KEY_CACHE_CB *keycache) { if (!--keycache->cnt_for_resize_op) release_whole_queue(&keycache->waiting_for_resize_cnt); } + /* - Change the key cache parameters + Change key cache parameters of a simple key cache SYNOPSIS - change_key_cache_param() - keycache pointer to a key cache data structure - division_limit new division limit (if not zero) - age_threshold new age threshold (if not zero) + change_simple_key_cache_param() + keycache pointer to the control block of a simple key cache + division_limit new division limit (if not zero) + age_threshold new age threshold (if not zero) + + DESCRIPTION + This function is the implementation of the change_key_cache_param interface + function that is employed by simple (non-partitioned) key caches. + The function takes the parameter keycache as a pointer to the + control block structure of the type SIMPLE_KEY_CACHE_CB for the simple key + cache where new values of the division limit and the age threshold used + for midpoint insertion strategy are to be set. The parameters + division_limit and age_threshold provide these new values. RETURN VALUE none NOTES. - Presently the function resets the key cache parameters - concerning midpoint insertion strategy - division_limit and - age_threshold. + Presently the function resets the key cache parameters concerning + midpoint insertion strategy - division_limit and age_threshold. + This function changes some parameters of a given key cache without + reformatting it. The function does not touch the contents the key + cache blocks. */ -void change_key_cache_param(KEY_CACHE *keycache, uint division_limit, - uint age_threshold) +static +void change_simple_key_cache_param(SIMPLE_KEY_CACHE_CB *keycache, uint division_limit, + uint age_threshold) { - DBUG_ENTER("change_key_cache_param"); - + DBUG_ENTER("change_simple_key_cache_param"); keycache_pthread_mutex_lock(&keycache->cache_lock); if (division_limit) keycache->min_warm_blocks= (keycache->disk_blocks * @@ -722,20 +951,31 @@ void change_key_cache_param(KEY_CACHE *k /* - Remove key_cache from memory + Destroy a simple key cache SYNOPSIS - end_key_cache() - keycache key cache handle - cleanup Complete free (Free also mutex for key cache) + end_simple_key_cache() + keycache pointer to the control block of a simple key cache + cleanup <=> complete free (free also mutex for key cache) + + DESCRIPTION + This function is the implementation of the end_key_cache interface + function that is employed by simple (non-partitioned) key caches. + The function takes the parameter keycache as a pointer to the + control block structure of the type SIMPLE_KEY_CACHE_CB for the simple key + cache to be destroyed. + The function frees the memory allocated for the key cache blocks and + auxiliary structures. If the value of the parameter cleanup is TRUE + then even the key cache mutex is freed. RETURN VALUE none */ -void end_key_cache(KEY_CACHE *keycache, my_bool cleanup) +static +void end_simple_key_cache(SIMPLE_KEY_CACHE_CB *keycache, my_bool cleanup) { - DBUG_ENTER("end_key_cache"); + DBUG_ENTER("end_simple_key_cache"); DBUG_PRINT("enter", ("key_cache: 0x%lx", (long) keycache)); if (!keycache->key_cache_inited) @@ -1026,7 +1266,7 @@ static inline void link_changed(BLOCK_LI void */ -static void link_to_file_list(KEY_CACHE *keycache, +static void link_to_file_list(SIMPLE_KEY_CACHE_CB *keycache, BLOCK_LINK *block, int file, my_bool unlink_block) { @@ -1067,7 +1307,7 @@ static void link_to_file_list(KEY_CACHE void */ -static void link_to_changed_list(KEY_CACHE *keycache, +static void link_to_changed_list(SIMPLE_KEY_CACHE_CB *keycache, BLOCK_LINK *block) { DBUG_ASSERT(block->status & BLOCK_IN_USE); @@ -1122,8 +1362,8 @@ static void link_to_changed_list(KEY_CAC not linked in the LRU ring. */ -static void link_block(KEY_CACHE *keycache, BLOCK_LINK *block, my_bool hot, - my_bool at_end) +static void link_block(SIMPLE_KEY_CACHE_CB *keycache, BLOCK_LINK *block, + my_bool hot, my_bool at_end) { BLOCK_LINK *ins; BLOCK_LINK **pins; @@ -1243,7 +1483,7 @@ static void link_block(KEY_CACHE *keycac See NOTES for link_block */ -static void unlink_block(KEY_CACHE *keycache, BLOCK_LINK *block) +static void unlink_block(SIMPLE_KEY_CACHE_CB *keycache, BLOCK_LINK *block) { DBUG_ASSERT((block->status & ~BLOCK_CHANGED) == (BLOCK_READ | BLOCK_IN_USE)); DBUG_ASSERT(block->hash_link); /*backptr to block NULL from free_block()*/ @@ -1301,7 +1541,8 @@ static void unlink_block(KEY_CACHE *keyc RETURN void */ -static void reg_requests(KEY_CACHE *keycache, BLOCK_LINK *block, int count) +static void reg_requests(SIMPLE_KEY_CACHE_CB *keycache, + BLOCK_LINK *block, int count) { DBUG_ASSERT(block->status & BLOCK_IN_USE); DBUG_ASSERT(block->hash_link); @@ -1344,7 +1585,7 @@ static void reg_requests(KEY_CACHE *keyc not linked in the LRU ring. */ -static void unreg_request(KEY_CACHE *keycache, +static void unreg_request(SIMPLE_KEY_CACHE_CB *keycache, BLOCK_LINK *block, int at_end) { DBUG_ASSERT(block->status & (BLOCK_READ | BLOCK_IN_USE)); @@ -1433,7 +1674,7 @@ static void remove_reader(BLOCK_LINK *bl signals on its termination */ -static void wait_for_readers(KEY_CACHE *keycache, +static void wait_for_readers(SIMPLE_KEY_CACHE_CB *keycache, BLOCK_LINK *block) { #ifdef THREAD @@ -1482,7 +1723,7 @@ static inline void link_hash(HASH_LINK * Remove a hash link from the hash table */ -static void unlink_hash(KEY_CACHE *keycache, HASH_LINK *hash_link) +static void unlink_hash(SIMPLE_KEY_CACHE_CB *keycache, HASH_LINK *hash_link) { KEYCACHE_DBUG_PRINT("unlink_hash", ("fd: %u pos_ %lu #requests=%u", (uint) hash_link->file,(ulong) hash_link->diskpos, hash_link->requests)); @@ -1538,7 +1779,7 @@ static void unlink_hash(KEY_CACHE *keyca Get the hash link for a page */ -static HASH_LINK *get_hash_link(KEY_CACHE *keycache, +static HASH_LINK *get_hash_link(SIMPLE_KEY_CACHE_CB *keycache, int file, my_off_t filepos) { reg1 HASH_LINK *hash_link, **start; @@ -1659,7 +1900,7 @@ restart: waits until first of this operations links any block back. */ -static BLOCK_LINK *find_key_block(KEY_CACHE *keycache, +static BLOCK_LINK *find_key_block(SIMPLE_KEY_CACHE_CB *keycache, File file, my_off_t filepos, int init_hits_left, int wrmode, int *page_st) @@ -2419,7 +2660,7 @@ restart: portion is less than read_length, but not less than min_length. */ -static void read_block(KEY_CACHE *keycache, +static void read_block(SIMPLE_KEY_CACHE_CB *keycache, BLOCK_LINK *block, uint read_length, uint min_length, my_bool primary) { @@ -2507,43 +2748,60 @@ static void read_block(KEY_CACHE *keycac /* - Read a block of data from a cached file into a buffer; + Read a block of data from a simple key cache into a buffer SYNOPSIS - key_cache_read() - keycache pointer to a key cache data structure - file handler for the file for the block of data to be read - filepos position of the block of data in the file - level determines the weight of the data - buff buffer to where the data must be placed - length length of the buffer - block_length length of the block in the key cache buffer - return_buffer return pointer to the key cache buffer with the data + simple_key_cache_read() + keycache pointer to the control block of a simple key cache + file handler for the file for the block of data to be read + filepos position of the block of data in the file + level determines the weight of the data + buff buffer to where the data must be placed + length length of the buffer + block_length length of the read data from a key cache block + return_buffer return pointer to the key cache buffer with the data + DESCRIPTION + This function is the implementation of the key_cache_read interface + function that is employed by simple (non-partitioned) key caches. + The function takes the parameter keycache as a pointer to the + control block structure of the type SIMPLE_KEY_CACHE_CB for a simple key + cache. + In a general case the function reads a block of data from the key cache + into the buffer buff of the size specified by the parameter length. The + beginning of the block of data to be read is specified by the parameters + file and filepos. The length of the read data is the same as the length + of the buffer. The data is read into the buffer in key_cache_block_size + increments. If the next portion of the data is not found in any key cache + block, first it is read from file into the key cache. + If the parameter return_buffer is not ignored and its value is TRUE, and + the data to be read of the specified size block_length can be read from one + key cache buffer, then the function returns a pointer to the data in the + key cache buffer. + The function takse into account parameters block_length and return buffer + only in a single-threaded environment. + The parameter 'level' is used only by the midpoint insertion strategy + when the data or its portion cannot be found in the key cache. + RETURN VALUE - Returns address from where the data is placed if sucessful, 0 - otherwise. + Returns address from where the data is placed if successful, 0 - otherwise. - NOTES. - The function ensures that a block of data of size length from file - positioned at filepos is in the buffers for some key cache blocks. - Then the function either copies the data into the buffer buff, or, - if return_buffer is TRUE, it just returns the pointer to the key cache - buffer with the data. + NOTES Filepos must be a multiple of 'block_length', but it doesn't have to be a multiple of key_cache_block_size; */ -uchar *key_cache_read(KEY_CACHE *keycache, - File file, my_off_t filepos, int level, - uchar *buff, uint length, - uint block_length __attribute__((unused)), - int return_buffer __attribute__((unused))) +uchar *simple_key_cache_read(SIMPLE_KEY_CACHE_CB *keycache, + File file, my_off_t filepos, int level, + uchar *buff, uint length, + uint block_length __attribute__((unused)), + int return_buffer __attribute__((unused))) { my_bool locked_and_incremented= FALSE; int error=0; uchar *start= buff; - DBUG_ENTER("key_cache_read"); + DBUG_ENTER("simple_key_cache_read"); DBUG_PRINT("enter", ("fd: %u pos: %lu length: %u", (uint) file, (ulong) filepos, length)); @@ -2738,28 +2996,47 @@ end: /* - Insert a block of file data from a buffer into key cache + Insert a block of file data from a buffer into a simple key cache SYNOPSIS - key_cache_insert() - keycache pointer to a key cache data structure + simple_key_cache_insert() + keycache pointer to the control block of a simple key cache file handler for the file to insert data from filepos position of the block of data in the file to insert level determines the weight of the data buff buffer to read data from length length of the data in the buffer - NOTES - This is used by MyISAM to move all blocks from a index file to the key - cache - + DESCRIPTION + This function is the implementation of the key_cache_insert interface + function that is employed by simple (non-partitioned) key caches. + The function takes the parameter keycache as a pointer to the + control block structure of the type SIMPLE_KEY_CACHE_CB for a simple key + cache. + The function writes a block of file data from a buffer into the key cache. + The buffer is specified with the parameters buff and length - the pointer + to the beginning of the buffer and its size respectively. It's assumed + the buffer contains the data from 'file' allocated from the position + filepos. The data is copied from the buffer in key_cache_block_size + increments. + The parameter level is used to set one characteristic for the key buffers + loaded with the data from buff. The characteristic is used only by the + midpoint insertion strategy. + RETURN VALUE 0 if a success, 1 - otherwise. + + NOTES + The function is used by MyISAM to move all blocks from a index file to + the key cache. It can be performed in parallel with reading the file data + from the key buffers by other threads. + */ -int key_cache_insert(KEY_CACHE *keycache, - File file, my_off_t filepos, int level, - uchar *buff, uint length) +static +int simple_key_cache_insert(SIMPLE_KEY_CACHE_CB *keycache, + File file, my_off_t filepos, int level, + uchar *buff, uint length) { int error= 0; DBUG_ENTER("key_cache_insert"); @@ -2979,43 +3256,64 @@ int key_cache_insert(KEY_CACHE *keycache /* - Write a buffer into a cached file. + Write a buffer into a simple key cache SYNOPSIS - key_cache_write() - keycache pointer to a key cache data structure - file handler for the file to write data to - filepos position in the file to write data to - level determines the weight of the data - buff buffer with the data - length length of the buffer - dont_write if is 0 then all dirty pages involved in writing - should have been flushed from key cache + simple_key_cache_write() + keycache pointer to the control block of a simple key cache + file handler for the file to write data to + file_extra maps of key cache partitions containing + dirty pages from file + filepos position in the file to write data to + level determines the weight of the data + buff buffer with the data + length length of the buffer + dont_write if is 0 then all dirty pages involved in writing + should have been flushed from key cache + DESCRIPTION + This function is the implementation of the key_cache_write interface + function that is employed by simple (non-partitioned) key caches. + The function takes the parameter keycache as a pointer to the + control block structure of the type SIMPLE_KEY_CACHE_CB for a simple key + cache. + In a general case the function copies data from a buffer into the key + cache. The buffer is specified with the parameters buff and length - + the pointer to the beginning of the buffer and its size respectively. + It's assumed the buffer contains the data to be written into 'file' + starting from the position filepos. The data is copied from the buffer + in key_cache_block_size increments. + If the value of the parameter dont_write is FALSE then the function + also writes the data into file. + The parameter level is used to set one characteristic for the key buffers + filled with the data from buff. The characteristic is employed only by + the midpoint insertion strategy. + The parameter file_extra currently makes sense only for simple key caches + that are elements of a partitioned key cache. It provides a pointer to the + shared bitmap of the partitions that may contains dirty pages for the file. + This bitmap is used to optimize the function + flush_partitioned_key_cache_blocks. + RETURN VALUE 0 if a success, 1 - otherwise. - NOTES. - The function copies the data of size length from buff into buffers - for key cache blocks that are assigned to contain the portion of - the file starting with position filepos. - It ensures that this data is flushed to the file if dont_write is FALSE. - Filepos must be a multiple of 'block_length', but it doesn't - have to be a multiple of key_cache_block_size; - - dont_write is always TRUE in the server (info->lock_type is never F_UNLCK). + NOTES + This implementation exploits the fact that the function is called only + when a thread has got an exclusive lock for the key file. */ -int key_cache_write(KEY_CACHE *keycache, - File file, my_off_t filepos, int level, - uchar *buff, uint length, - uint block_length __attribute__((unused)), - int dont_write) +static +int simple_key_cache_write(SIMPLE_KEY_CACHE_CB *keycache, + File file, void *file_extra __attribute__((unused)), + my_off_t filepos, int level, + uchar *buff, uint length, + uint block_length __attribute__((unused)), + int dont_write) { my_bool locked_and_incremented= FALSE; int error=0; - DBUG_ENTER("key_cache_write"); + DBUG_ENTER("simple_key_cache_write"); DBUG_PRINT("enter", ("fd: %u pos: %lu length: %u block_length: %u" " key_block_length: %u", @@ -3330,7 +3628,7 @@ end: Block must have a request registered on it. */ -static void free_block(KEY_CACHE *keycache, BLOCK_LINK *block) +static void free_block(SIMPLE_KEY_CACHE_CB *keycache, BLOCK_LINK *block) { KEYCACHE_THREAD_TRACE("free block"); KEYCACHE_DBUG_PRINT("free_block", @@ -3470,7 +3768,7 @@ static int cmp_sec_link(BLOCK_LINK **a, free used blocks if requested */ -static int flush_cached_blocks(KEY_CACHE *keycache, +static int flush_cached_blocks(SIMPLE_KEY_CACHE_CB *keycache, File file, BLOCK_LINK **cache, BLOCK_LINK **end, enum flush_type type) @@ -3514,9 +3812,9 @@ static int flush_cached_blocks(KEY_CACHE (BLOCK_READ | BLOCK_IN_FLUSH | BLOCK_CHANGED | BLOCK_IN_USE)); block->status|= BLOCK_IN_FLUSHWRITE; keycache_pthread_mutex_unlock(&keycache->cache_lock); - error= my_pwrite(file, block->buffer+block->offset, + error= my_pwrite(file, block->buffer + block->offset, block->length - block->offset, - block->hash_link->diskpos+ block->offset, + block->hash_link->diskpos + block->offset, MYF(MY_NABP | MY_WAIT_IF_FULL)); keycache_pthread_mutex_lock(&keycache->cache_lock); keycache->global_cache_write++; @@ -3576,7 +3874,7 @@ static int flush_cached_blocks(KEY_CACHE /* - Flush all key blocks for a file to disk, but don't do any mutex locks. + Flush all key blocks for a file to disk, but don't do any mutex locks SYNOPSIS flush_key_blocks_int() @@ -3598,7 +3896,7 @@ static int flush_cached_blocks(KEY_CACHE 1 error */ -static int flush_key_blocks_int(KEY_CACHE *keycache, +static int flush_key_blocks_int(SIMPLE_KEY_CACHE_CB *keycache, File file, enum flush_type type) { BLOCK_LINK *cache_buff[FLUSH_CACHE],**cache; @@ -4040,22 +4338,46 @@ err: /* - Flush all blocks for a file to disk + Flush all blocks for a file from key buffers of a simple key cache SYNOPSIS - flush_key_blocks() - keycache pointer to a key cache data structure - file handler for the file to flush to - flush_type type of the flush + flush_simple_key_blocks() + keycache pointer to the control block of a simple key cache + file handler for the file to flush to + file_extra maps of key cache partitions containing + dirty pages from file (not used) + flush_type type of the flush operation + DESCRIPTION + This function is the implementation of the flush_key_blocks interface + function that is employed by simple (non-partitioned) key caches. + The function takes the parameter keycache as a pointer to the + control block structure of the type S_KEY_CACHE_CB for a simple key + cache. + In a general case the function flushes the data from all dirty key + buffers related to the file 'file' into this file. The function does + exactly this if the value of the parameter type is FLUSH_KEEP. If the + value of this parameter is FLUSH_RELEASE, the function additionally + releases the key buffers containing data from 'file' for new usage. + If the value of the parameter type is FLUSH_IGNORE_CHANGED the function + just releases the key buffers containing data from 'file'. + The parameter file_extra currently is not used by this function. + RETURN 0 ok 1 error + + NOTES + This implementation exploits the fact that the function is called only + when a thread has got an exclusive lock for the key file. */ -int flush_key_blocks(KEY_CACHE *keycache, - File file, enum flush_type type) +static +int flush_simple_key_cache_blocks(SIMPLE_KEY_CACHE_CB *keycache, + File file, + void *file_extra __attribute__((unused)), + enum flush_type type) { int res= 0; DBUG_ENTER("flush_key_blocks"); @@ -4109,7 +4431,7 @@ int flush_key_blocks(KEY_CACHE *keycache != 0 Error */ -static int flush_all_key_blocks(KEY_CACHE *keycache) +static int flush_all_key_blocks(SIMPLE_KEY_CACHE_CB *keycache) { BLOCK_LINK *block; uint total_found; @@ -4212,37 +4534,43 @@ static int flush_all_key_blocks(KEY_CACH /* - Reset the counters of a key cache. + Reset the counters of a simple key cache SYNOPSIS - reset_key_cache_counters() - name the name of a key cache - key_cache pointer to the key kache to be reset + reset_simple_key_cache_counters() + name the name of a key cache + keycache pointer to the control block of a simple key cache DESCRIPTION - This procedure is used by process_key_caches() to reset the counters of all - currently used key caches, both the default one and the named ones. + This function is the implementation of the reset_key_cache_counters + interface function that is employed by simple (non-partitioned) key caches. + The function takes the parameter keycache as a pointer to the + control block structure of the type S_KEY_CACHE_CB for a simple key cache. + This function resets the values of all statistical counters for the key + cache to 0. + The parameter name is currently not used. RETURN 0 on success (always because it can't fail) */ -int reset_key_cache_counters(const char *name __attribute__((unused)), - KEY_CACHE *key_cache) +static +int reset_simple_key_cache_counters(const char *name __attribute__((unused)), + SIMPLE_KEY_CACHE_CB *keycache) { - DBUG_ENTER("reset_key_cache_counters"); - if (!key_cache->key_cache_inited) + DBUG_ENTER("reset_simple_key_cache_counters"); + if (!keycache->key_cache_inited) { DBUG_PRINT("info", ("Key cache %s not initialized.", name)); DBUG_RETURN(0); } DBUG_PRINT("info", ("Resetting counters for key cache %s.", name)); - key_cache->global_blocks_changed= 0; /* Key_blocks_not_flushed */ - key_cache->global_cache_r_requests= 0; /* Key_read_requests */ - key_cache->global_cache_read= 0; /* Key_reads */ - key_cache->global_cache_w_requests= 0; /* Key_write_requests */ - key_cache->global_cache_write= 0; /* Key_writes */ + keycache->global_blocks_changed= 0; /* Key_blocks_not_flushed */ + keycache->global_cache_r_requests= 0; /* Key_read_requests */ + keycache->global_cache_read= 0; /* Key_reads */ + keycache->global_cache_w_requests= 0; /* Key_write_requests */ + keycache->global_cache_write= 0; /* Key_writes */ DBUG_RETURN(0); } @@ -4251,9 +4579,10 @@ int reset_key_cache_counters(const char /* Test if disk-cache is ok */ -static void test_key_cache(KEY_CACHE *keycache __attribute__((unused)), - const char *where __attribute__((unused)), - my_bool lock __attribute__((unused))) +static +void test_key_cache(SIMPLE_KEY_CACHE_CB *keycache __attribute__((unused)), + const char *where __attribute__((unused)), + my_bool lock __attribute__((unused))) { /* TODO */ } @@ -4265,7 +4594,7 @@ static void test_key_cache(KEY_CACHE *ke #define MAX_QUEUE_LEN 100 -static void keycache_dump(KEY_CACHE *keycache) +static void keycache_dump(SIMPLE_KEY_CACHE_CB *keycache) { FILE *keycache_dump_file=fopen(KEYCACHE_DUMP_FILE, "w"); struct st_my_thread_var *last; @@ -4505,7 +4834,7 @@ static int fail_hlink(HASH_LINK *hlink) return 0; /* Let the assert fail. */ } -static int cache_empty(KEY_CACHE *keycache) +static int cache_empty(SIMPLE_KEY_CACHE_CB *keycache) { int errcnt= 0; int idx; @@ -4543,3 +4872,1702 @@ static int cache_empty(KEY_CACHE *keycac } #endif + +/* + Get statistics for a simple key cache + + SYNOPSIS + get_simple_key_cache_statistics() + keycache pointer to the control block of a simple key cache + partition_no partition number (not used) + key_cache_stats OUT pointer to the structure for the returned statistics + + DESCRIPTION + This function is the implementation of the get_key_cache_statistics + interface function that is employed by simple (non-partitioned) key caches. + The function takes the parameter keycache as a pointer to the + control block structure of the type SIMPLE_KEY_CACHE_CB for a simple key + cache. This function returns the statistical data for the key cache. + The parameter partition_no is not used by this function. + + RETURN + none +*/ + +static +void get_simple_key_cache_statistics(SIMPLE_KEY_CACHE_CB *keycache, + uint partition_no __attribute__((unused)), + KEY_CACHE_STATISTICS *keycache_stats) +{ + DBUG_ENTER("simple_get_key_cache_statistics"); + + keycache_stats->mem_size= (longlong) keycache->key_cache_mem_size; + keycache_stats->block_size= (longlong) keycache->key_cache_block_size; + keycache_stats->blocks_used= keycache->blocks_used; + keycache_stats->blocks_unused= keycache->blocks_unused; + keycache_stats->blocks_changed= keycache->global_blocks_changed; + keycache_stats->read_requests= keycache->global_cache_r_requests; + keycache_stats->reads= keycache->global_cache_read; + keycache_stats->write_requests= keycache->global_cache_w_requests; + keycache_stats->writes= keycache->global_cache_write; + DBUG_VOID_RETURN; +} + + +/* + Offsets of the statistical values in the control block for a simple key cache + The first NO_LONG_KEY_CACHE_STAT_VARIABLES=3 are of the ulong type while the + remaining are of the ulonglong type. + */ +static size_t simple_key_cache_stat_var_offsets[]= +{ + offsetof(SIMPLE_KEY_CACHE_CB, blocks_used), + offsetof(SIMPLE_KEY_CACHE_CB, blocks_unused), + offsetof(SIMPLE_KEY_CACHE_CB, global_blocks_changed), + offsetof(SIMPLE_KEY_CACHE_CB, global_cache_w_requests), + offsetof(SIMPLE_KEY_CACHE_CB, global_cache_write), + offsetof(SIMPLE_KEY_CACHE_CB, global_cache_r_requests), + offsetof(SIMPLE_KEY_CACHE_CB, global_cache_read) +}; + + +/* + Get the value of a statistical variable for a simple key cache + + SYNOPSIS + get_simple_key_cache_stat_value() + keycache pointer to the control block of a simple key cache + var_no the ordered number of a statistical variable + + DESCRIPTION + This function is the implementation of the get_simple_key_cache_stat_value + interface function that is employed by simple (non-partitioned) key caches. + The function takes the parameter keycache as a pointer to the + control block structure of the type SIMPLE_KEY_CACHE_CB for a simple key + cache. This function returns the value of the statistical variable var_no + for this key cache. The variables are numbered starting from 0 to 6. + + RETURN + The value of the specified statistical variable + +*/ + +static +ulonglong get_simple_key_cache_stat_value(SIMPLE_KEY_CACHE_CB *keycache, + uint var_no) +{ + size_t var_ofs= simple_key_cache_stat_var_offsets[var_no]; + ulonglong res= 0; + DBUG_ENTER("get_simple_key_cache_stat_value"); + + if (var_no < 3) + res= (ulonglong) (*(long *) ((char *) keycache + var_ofs)); + else + res= *(ulonglong *) ((char *) keycache + var_ofs); + + DBUG_RETURN(res); +} + + +/* + The array of pointer to the key cache interface functions used for simple + key caches. Any simple key cache objects including those incorporated into + partitioned keys caches exploit this array. + + The current implementation of these functions allows to call them from + the MySQL server code directly. We don't do it though. +*/ + +static KEY_CACHE_FUNCS simple_key_cache_funcs = +{ + (INIT_KEY_CACHE) init_simple_key_cache, + (RESIZE_KEY_CACHE) resize_simple_key_cache, + (CHANGE_KEY_CACHE_PARAM) change_simple_key_cache_param, + (KEY_CACHE_READ) simple_key_cache_read, + (KEY_CACHE_INSERT) simple_key_cache_insert, + (KEY_CACHE_WRITE) simple_key_cache_write, + (FLUSH_KEY_BLOCKS) flush_simple_key_cache_blocks, + (RESET_KEY_CACHE_COUNTERS) reset_simple_key_cache_counters, + (END_KEY_CACHE) end_simple_key_cache, + (GET_KEY_CACHE_STATISTICS) get_simple_key_cache_statistics, + (GET_KEY_CACHE_STAT_VALUE) get_simple_key_cache_stat_value +}; + + +/****************************************************************************** + Partitioned Key Cache Module + + The module contains implementations of all key cache interface functions + employed by partitioned key caches. + + A partitioned key cache is a collection of structures for simple key caches + called key cache partitions. Any page from a file can be placed into a buffer + of only one partition. The number of the partition is calculated from + the file number and the position of the page in the file, and it's always the + same for the page. The function that maps pages into partitions takes care + of even distribution of pages among partitions. + + Partition key cache mitigate one of the major problem of simple key cache: + thread contention for key cache lock (mutex). Every call of a key cache + interface function must acquire this lock. So threads compete for this lock + even in the case when they have acquired shared locks for the file and + pages they want read from are in the key cache buffers. + When working with a partitioned key cache any key cache interface function + that needs only one page has to acquire the key cache lock only for the + partition the page is ascribed to. This makes the chances for threads not + compete for the same key cache lock better. Unfortunately if we use a + partitioned key cache with N partitions for B-tree indexes we can't say + that the chances becomes N times less. The fact is that any index lookup + operation requires reading from the root page that, for any index, is always + ascribed to the same partition. To resolve this problem we should have + employed more sophisticated mechanisms of working with root pages. + + Currently the number of partitions in a partitioned key cache is limited + by 64. We could increase this limit. Simultaneously we would have to increase + accordingly the size of the bitmap dirty_part_map from the MYISAM_SHARE + structure. + +******************************************************************************/ + +/* Control block for a partitioned key cache */ + +typedef struct st_partitioned_key_cache_cb +{ + my_bool key_cache_inited; /*<=> control block is allocated */ + SIMPLE_KEY_CACHE_CB **partition_array; /* the key cache partitions */ + size_t key_cache_mem_size; /* specified size of the cache memory */ + uint key_cache_block_size; /* size of the page buffer of a cache block */ + uint partitions; /* number of partitions in the key cache */ +} PARTITIONED_KEY_CACHE_CB; + +static +void end_partitioned_key_cache(PARTITIONED_KEY_CACHE_CB *keycache, + my_bool cleanup); + +static int +reset_partitioned_key_cache_counters(const char *name, + PARTITIONED_KEY_CACHE_CB *keycache); + +/* + Determine the partition to which the index block to read is ascribed + + SYNOPSIS + get_key_cache_partition() + keycache pointer to the control block of a partitioned key cache + file handler for the file for the block of data to be read + filepos position of the block of data in the file + + DESCRIPTION + The function determines the number of the partition in whose buffer the + block from 'file' at the position filepos has to be placed for reading. + The function returns the control block of the simple key cache for this + partition to the caller. + + RETURN VALUE + The pointer to the control block of the partition to which the specified + file block is ascribed. +*/ + +static +SIMPLE_KEY_CACHE_CB * +get_key_cache_partition(PARTITIONED_KEY_CACHE_CB *keycache, + File file, my_off_t filepos) +{ + uint i= KEYCACHE_BASE_EXPR(file, filepos) % keycache->partitions; + return keycache->partition_array[i]; +} + + +/* + Determine the partition to which the index block to write is ascribed + + SYNOPSIS + get_key_cache_partition() + keycache pointer to the control block of a partitioned key cache + file handler for the file for the block of data to be read + filepos position of the block of data in the file + dirty_part_map pointer to the bitmap of dirty partitions for the file + + DESCRIPTION + The function determines the number of the partition in whose buffer the + block from 'file' at the position filepos has to be placed for writing and + marks the partition as dirty in the dirty_part_map bitmap. + The function returns the control block of the simple key cache for this + partition to the caller. + + RETURN VALUE + The pointer to the control block of the partition to which the specified + file block is ascribed. +*/ + +static SIMPLE_KEY_CACHE_CB +*get_key_cache_partition_for_write(PARTITIONED_KEY_CACHE_CB *keycache, + File file, my_off_t filepos, + ulonglong* dirty_part_map) +{ + uint i= KEYCACHE_BASE_EXPR( file, filepos) % keycache->partitions; + *dirty_part_map|= 1<<i; + return keycache->partition_array[i]; +} + + +/* + Initialize a partitioned key cache + + SYNOPSIS + init_partitioned_key_cache() + keycache pointer to the control block of a partitioned key cache + key_cache_block_size size of blocks to keep cached data + use_mem total memory to use for all key cache partitions + division_limit division limit (may be zero) + age_threshold age threshold (may be zero) + + DESCRIPTION + This function is the implementation of the init_key_cache interface function + that is employed by partitioned key caches. + The function builds and initializes an array of simple key caches, and then + initializes the control block structure of the type PARTITIONED_KEY_CACHE_CB + that is used for a partitioned key cache. The parameter keycache is + supposed to point to this structure. The number of partitions in the + partitioned key cache to be built must be passed through the field + 'partitions' of this structure. The parameter key_cache_block_size specifies + the size of the blocks in the the simple key caches to be built. + The parameters division_limit and age_threshold determine the initial + values of those characteristics of the simple key caches that are used for + midpoint insertion strategy. The parameter use_mem specifies the total + amount of memory to be allocated for the key cache blocks in all simple key + caches and for all auxiliary structures. + + RETURN VALUE + total number of blocks in key cache partitions, if successful, + <= 0 - otherwise. + + NOTES + If keycache->key_cache_inited != 0 then we assume that the memory for + the array of partitions has been already allocated. + + It's assumed that no two threads call this function simultaneously + referring to the same key cache handle. +*/ + +static +int init_partitioned_key_cache(PARTITIONED_KEY_CACHE_CB *keycache, + uint key_cache_block_size, + size_t use_mem, uint division_limit, + uint age_threshold) +{ + int i; + size_t mem_per_cache; + size_t mem_decr; + int cnt; + SIMPLE_KEY_CACHE_CB *partition; + SIMPLE_KEY_CACHE_CB **partition_ptr; + uint partitions= keycache->partitions; + int blocks= 0; + DBUG_ENTER("partitioned_init_key_cache"); + + keycache->key_cache_block_size = key_cache_block_size; + + if (keycache->key_cache_inited) + partition_ptr= keycache->partition_array; + else + { + if(!(partition_ptr= + (SIMPLE_KEY_CACHE_CB **) my_malloc(sizeof(SIMPLE_KEY_CACHE_CB *) * + partitions, MYF(MY_WME)))) + DBUG_RETURN(-1); + bzero(partition_ptr, sizeof(SIMPLE_KEY_CACHE_CB *) * partitions); + keycache->partition_array= partition_ptr; + } + + mem_decr= mem_per_cache / 5; + mem_per_cache = use_mem / partitions; + + for (i= 0; i < (int) partitions; i++) + { + my_bool key_cache_inited= keycache->key_cache_inited; + if (key_cache_inited) + partition= *partition_ptr; + else + { + if (!(partition= + (SIMPLE_KEY_CACHE_CB *) my_malloc(sizeof(SIMPLE_KEY_CACHE_CB), + MYF(MY_WME)))) + continue; + partition->key_cache_inited= 0; + } + + cnt= init_simple_key_cache(partition, key_cache_block_size, mem_per_cache, + division_limit, age_threshold); + if (cnt <= 0) + { + end_simple_key_cache(partition, 1); + if (!key_cache_inited) + { + my_free(partition, MYF(0)); + partition= 0; + } + if (i == 0 && cnt < 0 || i > 0) + { + /* + Here we have two cases: + 1. i == 0 and cnt < 0 + cnt < 0 => mem_per_cache is not big enough to allocate minimal + number of key blocks in the key cache of the partition. + Decrease the the number of the partitions by 1 and start again. + 2. i > 0 + There is not enough memory for one of the succeeding partitions. + Just skip this partition decreasing the number of partitions in + the key cache by one. + Do not change the value of mem_per_cache in both cases. + */ + if (key_cache_inited) + { + my_free(partition, MYF(0)); + partition= 0; + if(key_cache_inited) + memmove(partition_ptr, partition_ptr+1, + sizeof(partition_ptr)*(partitions-i-1)); + } + if (!--partitions) + break; + } + else + { + /* + We come here when i == 0 && cnt == 0. + cnt == 0 => the memory allocator fails to allocate a block of + memory of the size mem_per_cache. Decrease the value of + mem_per_cache without changing the current number of partitions + and start again. Make sure that such a decrease may happen not + more than 5 times in total. + */ + if (use_mem <= mem_decr) + break; + use_mem-= mem_decr; + } + i--; + mem_per_cache= use_mem/partitions; + continue; + } + else + { + blocks+= cnt; + *partition_ptr++= partition; + } + } + + keycache->partitions= partitions= partition_ptr-keycache->partition_array; + keycache->key_cache_mem_size= mem_per_cache * partitions; + for (i= 0; i < (int) partitions; i++) + keycache->partition_array[i]->hash_factor= partitions; + + keycache->key_cache_inited= 1; + + if (!partitions) + blocks= -1; + + DBUG_RETURN(blocks); +} + + +/* + Resize a partitioned key cache + + SYNOPSIS + resize_partitioned_key_cache() + keycache pointer to the control block of a partitioned key cache + key_cache_block_size size of blocks to keep cached data + use_mem total memory to use for the new key cache + division_limit new division limit (if not zero) + age_threshold new age threshold (if not zero) + + DESCRIPTION + This function is the implementation of the resize_key_cache interface + function that is employed by partitioned key caches. + The function takes the parameter keycache as a pointer to the + control block structure of the type PARTITIONED_KEY_CACHE_CB for the + partitioned key cache to be resized. + The parameter key_cache_block_size specifies the new size of the blocks in + the simple key caches that comprise the partitioned key cache. + The parameters division_limit and age_threshold determine the new initial + values of those characteristics of the simple key cache that are used for + midpoint insertion strategy. The parameter use-mem specifies the total + amount of memory to be allocated for the key cache blocks in all new + simple key caches and for all auxiliary structures. + + RETURN VALUE + number of blocks in the key cache, if successful, + 0 - otherwise. + + NOTES. + The function first calls prepare_resize_simple_key_cache for each simple + key cache effectively flushing all dirty pages from it and destroying + the key cache. Then init_partitioned_key_cache is called. This call builds + a new array of simple key caches containing the same number of elements + as the old one. After this the function calls the function + finish_resize_simple_key_cache for each simple key cache from this array. + + This implementation doesn't block the calls and executions of other + functions from the key cache interface. However it assumes that the + calls of resize_partitioned_key_cache itself are serialized. +*/ + +static +int resize_partitioned_key_cache(PARTITIONED_KEY_CACHE_CB *keycache, + uint key_cache_block_size, + size_t use_mem, uint division_limit, + uint age_threshold) +{ + uint i; + uint partitions= keycache->partitions; + my_bool cleanup= use_mem == 0; + int blocks= -1; + int err= 0; + DBUG_ENTER("partitioned_resize_key_cache"); + if (cleanup) + { + end_partitioned_key_cache(keycache, 0); + DBUG_RETURN(-1); + } + for (i= 0; i < partitions; i++) + { + err|= prepare_resize_simple_key_cache(keycache->partition_array[i], 0, 1); + } + if (!err) + blocks= init_partitioned_key_cache(keycache, key_cache_block_size, + use_mem, division_limit, age_threshold); + if (blocks > 0) + { + for (i= 0; i < partitions; i++) + { + finish_resize_simple_key_cache(keycache->partition_array[i], 0, 1); + } + } + DBUG_RETURN(blocks); +} + + +/* + Change key cache parameters of a partitioned key cache + + SYNOPSIS + partitioned_change_key_cache_param() + keycache pointer to the control block of a partitioned key cache + division_limit new division limit (if not zero) + age_threshold new age threshold (if not zero) + + DESCRIPTION + This function is the implementation of the change_key_cache_param interface + function that is employed by partitioned key caches. + The function takes the parameter keycache as a pointer to the + control block structure of the type PARTITIONED_KEY_CACHE_CB for the simple + key cache where new values of the division limit and the age threshold used + for midpoint insertion strategy are to be set. The parameters + division_limit and age_threshold provide these new values. + + RETURN VALUE + none + + NOTES + The function just calls change_simple_key_cache_param for each element from + the array of simple caches that comprise the partitioned key cache. +*/ + +static +void change_partitioned_key_cache_param(PARTITIONED_KEY_CACHE_CB *keycache, + uint division_limit, + uint age_threshold) +{ + uint i; + uint partitions= keycache->partitions; + DBUG_ENTER("partitioned_change_key_cache_param"); + for (i= 0; i < partitions; i++) + { + change_simple_key_cache_param(keycache->partition_array[i], division_limit, + age_threshold); + } + DBUG_VOID_RETURN; +} + + +/* + Destroy a partitioned key cache + + SYNOPSIS + end_partitioned_key_cache() + keycache pointer to the control block of a partitioned key cache + cleanup <=> complete free (free also control block structures + for all simple key caches) + + DESCRIPTION + This function is the implementation of the end_key_cache interface + function that is employed by partitioned key caches. + The function takes the parameter keycache as a pointer to the + control block structure of the type PARTITIONED_KEY_CACHE_CB for the + partitioned key cache to be destroyed. + The function frees the memory allocated for the cache blocks and + auxiliary structures used by simple key caches that comprise the + partitioned key cache. If the value of the parameter cleanup is TRUE + then even the memory used for control blocks of the simple key caches + and the array of pointers to them are freed. + + RETURN VALUE + none +*/ + +static +void end_partitioned_key_cache(PARTITIONED_KEY_CACHE_CB *keycache, + my_bool cleanup) +{ + uint i; + uint partitions= keycache->partitions; + DBUG_ENTER("partitioned_end_key_cache"); + DBUG_PRINT("enter", ("key_cache: 0x%lx", (long) keycache)); + + for (i= 0; i < partitions; i++) + { + end_simple_key_cache(keycache->partition_array[i], cleanup); + } + if (cleanup) + { + for (i= 0; i < partitions; i++) + my_free((uchar*) keycache->partition_array[i], MYF(0)); + my_free((uchar*) keycache->partition_array, MYF(0)); + keycache->key_cache_inited= 0; + } + DBUG_VOID_RETURN; +} + + +/* + Read a block of data from a partitioned key cache into a buffer + + SYNOPSIS + + partitioned_key_cache_read() + keycache pointer to the control block of a partitioned key cache + file handler for the file for the block of data to be read + filepos position of the block of data in the file + level determines the weight of the data + buff buffer to where the data must be placed + length length of the buffer + block_length length of the read data from a key cache block + return_buffer return pointer to the key cache buffer with the data + + DESCRIPTION + This function is the implementation of the key_cache_read interface + function that is employed by partitioned key caches. + The function takes the parameter keycache as a pointer to the + control block structure of the type PARTITIONED_KEY_CACHE_CB for a + partitioned key cache. + In a general case the function reads a block of data from the key cache + into the buffer buff of the size specified by the parameter length. The + beginning of the block of data to be read is specified by the parameters + file and filepos. The length of the read data is the same as the length + of the buffer. The data is read into the buffer in key_cache_block_size + increments. To read each portion the function first finds out in what + partition of the key cache this portion(page) is to be saved, and calls + simple_key_cache_read with the pointer to the corresponding simple key as + its first parameter. + If the parameter return_buffer is not ignored and its value is TRUE, and + the data to be read of the specified size block_length can be read from one + key cache buffer, then the function returns a pointer to the data in the + key cache buffer. + The function takes into account parameters block_length and return buffer + only in a single-threaded environment. + The parameter 'level' is used only by the midpoint insertion strategy + when the data or its portion cannot be found in the key cache. + + RETURN VALUE + Returns address from where the data is placed if successful, 0 - otherwise. +*/ + +static +uchar *partitioned_key_cache_read(PARTITIONED_KEY_CACHE_CB *keycache, + File file, my_off_t filepos, int level, + uchar *buff, uint length, + uint block_length __attribute__((unused)), + int return_buffer __attribute__((unused))) +{ + uint r_length; + uint offset= (uint) (filepos % keycache->key_cache_block_size); + uchar *start= buff; + DBUG_ENTER("partitioned_key_cache_read"); + DBUG_PRINT("enter", ("fd: %u pos: %lu length: %u", + (uint) file, (ulong) filepos, length)); + +#ifndef THREAD + if (block_length > keycache->key_cache_block_size || offset) + return_buffer=0; +#endif + + /* Read data in key_cache_block_size increments */ + do + { + SIMPLE_KEY_CACHE_CB *partition= get_key_cache_partition(keycache, + file, filepos); + uchar *ret_buff= 0; + r_length= length; + set_if_smaller(r_length, keycache->key_cache_block_size - offset); + ret_buff= simple_key_cache_read((void *) partition, + file, filepos, level, + buff, r_length, + block_length, return_buffer); + if (ret_buff == 0) + DBUG_RETURN(0); +#ifndef THREAD + /* This is only true if we were able to read everything in one block */ + if (return_buffer) + DBUG_RETURN(ret_buff); +#endif + filepos+= r_length; + buff+= r_length; + offset= 0; + } while ((length-= r_length)); + + DBUG_RETURN(start); +} + + +/* + Insert a block of file data from a buffer into a partitioned key cache + + SYNOPSIS + partitioned_key_cache_insert() + keycache pointer to the control block of a partitioned key cache + file handler for the file to insert data from + filepos position of the block of data in the file to insert + level determines the weight of the data + buff buffer to read data from + length length of the data in the buffer + + DESCRIPTION + This function is the implementation of the key_cache_insert interface + function that is employed by partitioned key caches. + The function takes the parameter keycache as a pointer to the + control block structure of the type PARTITIONED_KEY_CACHE_CB for a + partitioned key cache. + The function writes a block of file data from a buffer into the key cache. + The buffer is specified with the parameters buff and length - the pointer + to the beginning of the buffer and its size respectively. It's assumed + that the buffer contains the data from 'file' allocated from the position + filepos. The data is copied from the buffer in key_cache_block_size + increments. For every portion of data the function finds out in what simple + key cache from the array of partitions the data must be stored, and after + this calls simple_key_cache_insert to copy the data into a key buffer of + this simple key cache. + The parameter level is used to set one characteristic for the key buffers + loaded with the data from buff. The characteristic is used only by the + midpoint insertion strategy. + + RETURN VALUE + 0 if a success, 1 - otherwise. + + NOTES + The function is used by MyISAM to move all blocks from a index file to + the key cache. It can be performed in parallel with reading the file data + from the key buffers by other threads. +*/ + +static +int partitioned_key_cache_insert(PARTITIONED_KEY_CACHE_CB *keycache, + File file, my_off_t filepos, int level, + uchar *buff, uint length) +{ + uint w_length; + uint offset= (uint) (filepos % keycache->key_cache_block_size); + DBUG_ENTER("partitioned_key_cache_insert"); + DBUG_PRINT("enter", ("fd: %u pos: %lu length: %u", + (uint) file,(ulong) filepos, length)); + + + /* Write data in key_cache_block_size increments */ + do + { + SIMPLE_KEY_CACHE_CB *partition= get_key_cache_partition(keycache, + file, filepos); + w_length= length; + set_if_smaller(w_length, keycache->key_cache_block_size - offset); + if (simple_key_cache_insert((void *) partition, + file, filepos, level, + buff, w_length)) + DBUG_RETURN(1); + + filepos+= w_length; + buff+= w_length; + offset = 0; + } while ((length-= w_length)); + + DBUG_RETURN(0); +} + + +/* + Write data from a buffer into a partitioned key cache + + SYNOPSIS + + partitioned_key_cache_write() + keycache pointer to the control block of a partitioned key cache + file handler for the file to write data to + filepos position in the file to write data to + level determines the weight of the data + buff buffer with the data + length length of the buffer + dont_write if is 0 then all dirty pages involved in writing + should have been flushed from key cache + file_extra maps of key cache partitions containing + dirty pages from file + + DESCRIPTION + This function is the implementation of the key_cache_write interface + function that is employed by partitioned key caches. + The function takes the parameter keycache as a pointer to the + control block structure of the type PARTITIONED_KEY_CACHE_CB for a + partitioned key cache. + In a general case the function copies data from a buffer into the key + cache. The buffer is specified with the parameters buff and length - + the pointer to the beginning of the buffer and its size respectively. + It's assumed the buffer contains the data to be written into 'file' + starting from the position filepos. The data is copied from the buffer + in key_cache_block_size increments. For every portion of data the + function finds out in what simple key cache from the array of partitions + the data must be stored, and after this calls simple_key_cache_write to + copy the data into a key buffer of this simple key cache. + If the value of the parameter dont_write is FALSE then the function + also writes the data into file. + The parameter level is used to set one characteristic for the key buffers + filled with the data from buff. The characteristic is employed only by + the midpoint insertion strategy. + The parameter file_expra provides a pointer to the shared bitmap of + the partitions that may contains dirty pages for the file. This bitmap + is used to optimize the function flush_partitioned_key_cache_blocks. + + RETURN VALUE + 0 if a success, 1 - otherwise. + + NOTES + This implementation exploits the fact that the function is called only + when a thread has got an exclusive lock for the key file. +*/ + +static +int partitioned_key_cache_write(PARTITIONED_KEY_CACHE_CB *keycache, + File file, void *file_extra, + my_off_t filepos, int level, + uchar *buff, uint length, + uint block_length __attribute__((unused)), + int dont_write) +{ + uint w_length; + ulonglong *part_map= (ulonglong *) file_extra; + uint offset= (uint) (filepos % keycache->key_cache_block_size); + DBUG_ENTER("partitioned_key_cache_write"); + DBUG_PRINT("enter", + ("fd: %u pos: %lu length: %u block_length: %u" + " key_block_length: %u", + (uint) file, (ulong) filepos, length, block_length, + keycache ? keycache->key_cache_block_size : 0)); + + + /* Write data in key_cache_block_size increments */ + do + { + SIMPLE_KEY_CACHE_CB *partition= get_key_cache_partition_for_write(keycache, + file, + filepos, + part_map); + w_length = length; + set_if_smaller(w_length, keycache->key_cache_block_size - offset ); + if (simple_key_cache_write(partition, + file, 0, filepos, level, + buff, w_length, block_length, + dont_write)) + DBUG_RETURN(1); + + filepos+= w_length; + buff+= w_length; + offset= 0; + } while ((length-= w_length)); + + DBUG_RETURN(0); +} + + +/* + Flush all blocks for a file from key buffers of a partitioned key cache + + SYNOPSIS + + flush_partitioned_key_cache_blocks() + keycache pointer to the control block of a partitioned key cache + file handler for the file to flush to + file_extra maps of key cache partitions containing + dirty pages from file (not used) + flush_type type of the flush operation + + DESCRIPTION + This function is the implementation of the flush_key_blocks interface + function that is employed by partitioned key caches. + The function takes the parameter keycache as a pointer to the + control block structure of the type PARTITIONED_KEY_CACHE_CB for a + partitioned key cache. + In a general case the function flushes the data from all dirty key + buffers related to the file 'file' into this file. The function does + exactly this if the value of the parameter type is FLUSH_KEEP. If the + value of this parameter is FLUSH_RELEASE, the function additionally + releases the key buffers containing data from 'file' for new usage. + If the value of the parameter type is FLUSH_IGNORE_CHANGED the function + just releases the key buffers containing data from 'file'. + The function performs the operation by calling the function + flush_simple_key_cache_blocks for the elements of the array of the + simple key caches that comprise the partitioned key_cache. If the value + of the parameter type is FLUSH_KEEP s_flush_key_blocks is called only + for the partitions with possibly dirty pages marked in the bitmap + pointed to by the parameter file_extra. + + RETURN + 0 ok + 1 error + + NOTES + This implementation exploits the fact that the function is called only + when a thread has got an exclusive lock for the key file. +*/ + +static +int flush_partitioned_key_cache_blocks(PARTITIONED_KEY_CACHE_CB *keycache, + File file, void *file_extra, + enum flush_type type) +{ + uint i; + uint partitions= keycache->partitions; + int err= 0; + ulonglong *dirty_part_map= (ulonglong *) file_extra; + DBUG_ENTER("partitioned_flush_key_blocks"); + DBUG_PRINT("enter", ("keycache: 0x%lx", (long) keycache)); + + for (i= 0; i < partitions; i++) + { + SIMPLE_KEY_CACHE_CB *partition= keycache->partition_array[i]; + if ((type == FLUSH_KEEP || type == FLUSH_FORCE_WRITE) && + !((*dirty_part_map) & ((ulonglong) 1 << i))) + continue; + err|= test(flush_simple_key_cache_blocks(partition, file, 0, type)); + } + *dirty_part_map= 0; + + DBUG_RETURN(err); +} + + +/* + Reset the counters of a partitioned key cache + + SYNOPSIS + reset_partitioned_key_cache_counters() + name the name of a key cache + keycache pointer to the control block of a partitioned key cache + + DESCRIPTION + This function is the implementation of the reset_key_cache_counters + interface function that is employed by partitioned key caches. + The function takes the parameter keycache as a pointer to the + control block structure of the type PARTITIONED_KEY_CACHE_CB for a partitioned + key cache. + This function resets the values of the statistical counters of the simple + key caches comprising partitioned key cache to 0. It does it by calling + reset_simple_key_cache_counters for each key cache partition. + The parameter name is currently not used. + + RETURN + 0 on success (always because it can't fail) +*/ + +static int +reset_partitioned_key_cache_counters(const char *name __attribute__((unused)), + PARTITIONED_KEY_CACHE_CB *keycache) +{ + uint i; + uint partitions= keycache->partitions; + DBUG_ENTER("partitioned_reset_key_cache_counters"); + + for (i = 0; i < partitions; i++) + { + reset_simple_key_cache_counters(name, keycache->partition_array[i]); + } + DBUG_RETURN(0); +} + + +/* + Get statistics for a partition key cache + + SYNOPSIS + get_partitioned_key_cache_statistics() + keycache pointer to the control block of a partitioned key cache + partition_no partition number to get statistics for + key_cache_stats OUT pointer to the structure for the returned statistics + + DESCRIPTION + This function is the implementation of the get_key_cache_statistics + interface function that is employed by partitioned key caches. + The function takes the parameter keycache as a pointer to the + control block structure of the type PARTITIONED_KEY_CACHE_CB for + a partitioned key cache. + If the value of the parameter partition_no is equal to 0 then aggregated + statistics for all partitions is returned in the fields of the + structure key_cache_stat of the type KEY_CACHE_STATISTICS . Otherwise + the function returns data for the partition number partition_no of the + key cache in the structure key_cache_stat. (Here partitions are numbered + starting from 1.) + + RETURN + none +*/ + +static +void +get_partitioned_key_cache_statistics(PARTITIONED_KEY_CACHE_CB *keycache, + uint partition_no, + KEY_CACHE_STATISTICS *keycache_stats) +{ + uint i; + SIMPLE_KEY_CACHE_CB *partition; + uint partitions= keycache->partitions; + DBUG_ENTER("get_partitioned_key_cache_statistics"); + + if (partition_no != 0) + { + partition= keycache->partition_array[partition_no-1]; + get_simple_key_cache_statistics((void *) partition, 0, keycache_stats); + DBUG_VOID_RETURN; + } + bzero(keycache_stats, sizeof(KEY_CACHE_STATISTICS)); + keycache_stats->mem_size= (longlong) keycache->key_cache_mem_size; + keycache_stats->block_size= (longlong) keycache->key_cache_block_size; + for (i = 0; i < partitions; i++) + { + partition= keycache->partition_array[i]; + keycache_stats->blocks_used+= partition->blocks_used; + keycache_stats->blocks_unused+= partition->blocks_unused; + keycache_stats->blocks_changed+= partition->global_blocks_changed; + keycache_stats->read_requests+= partition->global_cache_r_requests; + keycache_stats->reads+= partition->global_cache_read; + keycache_stats->write_requests+= partition->global_cache_w_requests; + keycache_stats->writes+= partition->global_cache_write; + } + DBUG_VOID_RETURN; +} + +/* + Get the value of a statistical variable for a partitioned key cache + + SYNOPSIS + get_partitioned_key_cache_stat_value() + keycache pointer to the control block of a partitioned key cache + var_no the ordered number of a statistical variable + + DESCRIPTION + This function is the implementation of the get_key_cache_stat_value + interface function that is employed by partitioned key caches. + The function takes the parameter keycache as a pointer to the + control block structure of the type PARTITIONED_KEY_CACHE_CB for a + partitioned key cache. + This function returns the value of the statistical variable var_no + for this key cache. The variables are numbered starting from 0 to 6. + The returned value is calculated as the sum of the values of the + statistical variable with number var_no for all simple key caches that + comprise the partitioned key cache. + + RETURN + The value of the specified statistical variable +*/ + +static +ulonglong +get_partitioned_key_cache_stat_value(PARTITIONED_KEY_CACHE_CB *keycache, + uint var_no) +{ + uint i; + uint partitions= keycache->partitions; + size_t var_ofs= simple_key_cache_stat_var_offsets[var_no]; + ulonglong res= 0; + DBUG_ENTER("get_partitioned_key_cache_stat_value"); + + if (var_no < NUM_LONG_KEY_CACHE_STAT_VARIABLES) + { + for (i = 0; i < partitions; i++) + { + SIMPLE_KEY_CACHE_CB *partition= keycache->partition_array[i]; + res+= (ulonglong) (*(long *) ((char *) partition + var_ofs)); + } + } + else + { + for (i = 0; i < partitions; i++) + { + SIMPLE_KEY_CACHE_CB *partition= keycache->partition_array[i]; + res+= *(ulonglong *) ((char *) partition + var_ofs); + } + } + DBUG_RETURN(res); +} + + +/* + The array of pointers to the key cache interface functions used by + partitioned key caches. Any partitioned key cache object caches exploits + this array. + + The current implementation of these functions does not allow to call + them from the MySQL server code directly. The key cache interface + wrappers must be used for this purpose. +*/ + +static KEY_CACHE_FUNCS partitioned_key_cache_funcs = +{ + (INIT_KEY_CACHE) init_partitioned_key_cache, + (RESIZE_KEY_CACHE) resize_partitioned_key_cache, + (CHANGE_KEY_CACHE_PARAM) change_partitioned_key_cache_param, + (KEY_CACHE_READ) partitioned_key_cache_read, + (KEY_CACHE_INSERT) partitioned_key_cache_insert, + (KEY_CACHE_WRITE) partitioned_key_cache_write, + (FLUSH_KEY_BLOCKS) flush_partitioned_key_cache_blocks, + (RESET_KEY_CACHE_COUNTERS) reset_partitioned_key_cache_counters, + (END_KEY_CACHE) end_partitioned_key_cache, + (GET_KEY_CACHE_STATISTICS) get_partitioned_key_cache_statistics, + (GET_KEY_CACHE_STAT_VALUE) get_partitioned_key_cache_stat_value +}; + + +/****************************************************************************** + Key Cache Interface Module + + The module contains wrappers for all key cache interface functions. + + Currently there are key caches of two types: simple key caches and + partitioned key caches. Each type (class) has its own implementation of the + basic key cache operations used the MyISAM storage engine. The pointers + to the implementation functions are stored in two static structures of the + type KEY_CACHE_FUNC: simple_key_cache_funcs - for simple key caches, and + partitioned_key_cache_funcs - for partitioned key caches. When a key cache + object is created the constructor procedure init_key_cache places a pointer + to the corresponding table into one of its fields. The procedure also + initializes a control block for the key cache oject and saves the pointer + to this block in another field of the key cache object. + When a key cache wrapper function is invoked for a key cache object to + perform a basic key cache operation it looks into the interface table + associated with the key cache oject and calls the corresponding + implementation of the operation. It passes the saved key cache control + block to this implementation. If, for some reasons, the control block + has not been fully initialized yet, the wrapper function either does not + do anything or, in the case when it perform a read/write operation, the + function do it directly through the system i/o functions. + + As we can see the model with which the key cache interface is supported + as quite conventional for interfaces in general. + +******************************************************************************/ + + +/* + Initialize a key cache + + SYNOPSIS + init_key_cache() + keycache pointer to the key cache to be initialized + key_cache_block_size size of blocks to keep cached data + use_mem total memory to use for cache buffers/structures + division_limit division limit (may be zero) + age_threshold age threshold (may be zero) + partitions number of partitions in the key cache + + DESCRIPTION + The function creates a control block structure for a key cache and + places the pointer to this block in the structure keycache. + If the value of the parameter 'partitions' is 0 then a simple key cache + is created. Otherwise a partitioned key cache with the specified number + of partitions is created. + The parameter key_cache_block_size specifies the size of the blocks in + the key cache to be created. The parameters division_limit and + age_threshold determine the initial values of those characteristics of + the key cache that are used for midpoint insertion strategy. The parameter + use_mem specifies the total amount of memory to be allocated for the + key cache buffers and for all auxiliary structures. + + RETURN VALUE + total number of blocks in key cache partitions, if successful, + <= 0 - otherwise. + + NOTES + if keycache->key_cache_inited != 0 we assume that the memory + for the control block of the key cache has been already allocated. + + It's assumed that no two threads call this function simultaneously + referring to the same key cache handle. +*/ + +int init_key_cache(KEY_CACHE *keycache, uint key_cache_block_size, + size_t use_mem, uint division_limit, + uint age_threshold, uint partitions) +{ + void *keycache_cb; + int blocks; + if (keycache->key_cache_inited) + keycache_cb= keycache->keycache_cb; + else + { + if (partitions == 0) + { + if (!(keycache_cb= (void *) my_malloc(sizeof(SIMPLE_KEY_CACHE_CB), + MYF(0)))) + return 0; + ((SIMPLE_KEY_CACHE_CB *) keycache_cb)->key_cache_inited= 0; + keycache->key_cache_type= SIMPLE_KEY_CACHE; + keycache->interface_funcs= &simple_key_cache_funcs; + } + else + { + if (!(keycache_cb= (void *) my_malloc(sizeof(PARTITIONED_KEY_CACHE_CB), + MYF(0)))) + return 0; + ((PARTITIONED_KEY_CACHE_CB *) keycache_cb)->key_cache_inited= 0; + keycache->key_cache_type= PARTITIONED_KEY_CACHE; + keycache->interface_funcs= &partitioned_key_cache_funcs; + } + keycache->keycache_cb= keycache_cb; + keycache->key_cache_inited= 1; + } + + if (partitions != 0) + { + ((PARTITIONED_KEY_CACHE_CB *) keycache_cb)->partitions= partitions; + } + keycache->can_be_used= 0; + blocks= keycache->interface_funcs->init(keycache_cb, key_cache_block_size, + use_mem, division_limit, + age_threshold); + keycache->partitions= partitions ? + ((PARTITIONED_KEY_CACHE_CB *) keycache_cb)->partitions : + 0; + DBUG_ASSERT(partitions <= MAX_KEY_CACHE_PARTITIONS); + if (blocks > 0) + keycache->can_be_used= 1; + return blocks; +} + + +/* + Resize a key cache + + SYNOPSIS + resize_key_cache() + keycache pointer to the key cache to be resized + key_cache_block_size size of blocks to keep cached data + use_mem total memory to use for the new key cache + division_limit new division limit (if not zero) + age_threshold new age threshold (if not zero) + + DESCRIPTION + The function operates over the key cache key cache. + The parameter key_cache_block_size specifies the new size of the block + buffers in the key cache. The parameters division_limit and age_threshold + determine the new initial values of those characteristics of the key cache + that are used for midpoint insertion strategy. The parameter use_mem + specifies the total amount of memory to be allocated for the key cache + buffers and for all auxiliary structures. + + RETURN VALUE + number of blocks in the key cache, if successful, + 0 - otherwise. + + NOTES + The function does not block the calls and executions of other functions + from the key cache interface. However it assumes that the calls of + resize_key_cache itself are serialized. + + Currently the function is called when the values of the variables + key_buffer_size and/or key_cache_block_size are being reset for + the key cache keycache. +*/ + +int resize_key_cache(KEY_CACHE *keycache, uint key_cache_block_size, + size_t use_mem, uint division_limit, uint age_threshold) +{ + int blocks= -1; + if (keycache->key_cache_inited) + { + if ((uint) keycache->param_partitions != keycache->partitions && use_mem) + blocks= repartition_key_cache(keycache, + key_cache_block_size, use_mem, + division_limit, age_threshold, + (uint) keycache->param_partitions); + else + { + blocks= keycache->interface_funcs->resize(keycache->keycache_cb, + key_cache_block_size, + use_mem, division_limit, + age_threshold); + + if (keycache->partitions) + keycache->partitions= + ((PARTITIONED_KEY_CACHE_CB *)(keycache->keycache_cb))->partitions; + } + + keycache->can_be_used= (blocks >= 0); + } + return blocks; +} + + +/* + Change key cache parameters of a key cache + + SYNOPSIS + change_key_cache_param() + keycache pointer to the key cache to change parameters for + division_limit new division limit (if not zero) + age_threshold new age threshold (if not zero) + + DESCRIPTION + The function sets new values of the division limit and the age threshold + used when the key cache keycach employs midpoint insertion strategy. + The parameters division_limit and age_threshold provide these new values. + + RETURN VALUE + none + + NOTES + Currently the function is called when the values of the variables + key_cache_division_limit and/or key_cache_age_threshold are being reset + for the key cache keycache. +*/ + +void change_key_cache_param(KEY_CACHE *keycache, uint division_limit, + uint age_threshold) +{ + if (keycache->key_cache_inited) + { + + keycache->interface_funcs->change_param(keycache->keycache_cb, + division_limit, + age_threshold); + } +} + + +/* + Destroy a key cache + + SYNOPSIS + end_key_cache() + keycache pointer to the key cache to be destroyed + cleanup <=> complete free + + DESCRIPTION + The function frees the memory allocated for the cache blocks and + auxiliary structures used by the key cache keycache. If the value + of the parameter cleanup is TRUE then all resources used by the key + cache are to be freed. + + RETURN VALUE + none +*/ + +void end_key_cache(KEY_CACHE *keycache, my_bool cleanup) +{ + if (keycache->key_cache_inited) + { + keycache->interface_funcs->end(keycache->keycache_cb, cleanup); + if (cleanup) + { + if (keycache->keycache_cb) + { + my_free((uchar *) keycache->keycache_cb, MYF(0)); + keycache->keycache_cb= 0; + } + keycache->key_cache_inited= 0; + } + keycache->can_be_used= 0; + } +} + + +/* + Read a block of data from a key cache into a buffer + + SYNOPSIS + + key_cache_read() + keycache pointer to the key cache to read data from + file handler for the file for the block of data to be read + filepos position of the block of data in the file + level determines the weight of the data + buff buffer to where the data must be placed + length length of the buffer + block_length length of the data read from a key cache block + return_buffer return pointer to the key cache buffer with the data + + DESCRIPTION + The function operates over buffers of the key cache keycache. + In a general case the function reads a block of data from the key cache + into the buffer buff of the size specified by the parameter length. The + beginning of the block of data to be read is specified by the parameters + file and filepos. The length of the read data is the same as the length + of the buffer. + If the parameter return_buffer is not ignored and its value is TRUE, and + the data to be read of the specified size block_length can be read from one + key cache buffer, then the function returns a pointer to the data in the + key cache buffer. + The parameter 'level' is used only by the midpoint insertion strategy + when the data or its portion cannot be found in the key cache. + The function reads data into the buffer directly from file if the control + block of the key cache has not been initialized yet. + + RETURN VALUE + Returns address from where the data is placed if successful, 0 - otherwise. + + NOTES. + Filepos must be a multiple of 'block_length', but it doesn't + have to be a multiple of key_cache_block_size; +*/ + +uchar *key_cache_read(KEY_CACHE *keycache, + File file, my_off_t filepos, int level, + uchar *buff, uint length, + uint block_length, int return_buffer) +{ + if (keycache->key_cache_inited && keycache->can_be_used) + return keycache->interface_funcs->read(keycache->keycache_cb, + file, filepos, level, + buff, length, + block_length, return_buffer); + + /* We can't use mutex here as the key cache may not be initialized */ + keycache->global_cache_r_requests++; + keycache->global_cache_read++; + + if (my_pread(file, (uchar*) buff, length, filepos, MYF(MY_NABP))) + return (uchar *) 0; + + return buff; +} + + +/* + Insert a block of file data from a buffer into a key cache + + SYNOPSIS + key_cache_insert() + keycache pointer to the key cache to insert data into + file handler for the file to insert data from + filepos position of the block of data in the file to insert + level determines the weight of the data + buff buffer to read data from + length length of the data in the buffer + + DESCRIPTION + The function operates over buffers of the key cache keycache. + The function writes a block of file data from a buffer into the key cache. + The buffer is specified with the parameters buff and length - the pointer + to the beginning of the buffer and its size respectively. It's assumed + that the buffer contains the data from 'file' allocated from the position + filepos. + The parameter level is used to set one characteristic for the key buffers + loaded with the data from buff. The characteristic is used only by the + midpoint insertion strategy. + + RETURN VALUE + 0 if a success, 1 - otherwise. + + NOTES + The function is used by MyISAM to move all blocks from a index file to + the key cache. + It is assumed that it may be performed in parallel with reading the file + data from the key buffers by other threads. +*/ + +int key_cache_insert(KEY_CACHE *keycache, + File file, my_off_t filepos, int level, + uchar *buff, uint length) +{ + if (keycache->key_cache_inited && keycache->can_be_used) + return keycache->interface_funcs->insert(keycache->keycache_cb, + file, filepos, level, + buff, length); + return 0; +} + + +/* + Write data from a buffer into a key cache + + SYNOPSIS + + key_cache_write() + keycache pointer to the key cache to write data to + file handler for the file to write data to + filepos position in the file to write data to + level determines the weight of the data + buff buffer with the data + length length of the buffer + dont_write if is 0 then all dirty pages involved in writing + should have been flushed from key cache + file_extra pointer to optional file attributes + + DESCRIPTION + The function operates over buffers of the key cache keycache. + In a general case the function writes data from a buffer into the key + cache. The buffer is specified with the parameters buff and length - + the pointer to the beginning of the buffer and its size respectively. + It's assumed the buffer contains the data to be written into 'file' + starting from the position filepos. + If the value of the parameter dont_write is FALSE then the function + also writes the data into file. + The parameter level is used to set one characteristic for the key buffers + filled with the data from buff. The characteristic is employed only by + the midpoint insertion strategy. + The parameter file_expra may point to additional file attributes used + for optimization or other purposes. + The function writes data from the buffer directly into file if the control + block of the key cache has not been initialized yet. + + RETURN VALUE + 0 if a success, 1 - otherwise. + + NOTES + This implementation may exploit the fact that the function is called only + when a thread has got an exclusive lock for the key file. +*/ + +int key_cache_write(KEY_CACHE *keycache, + File file, void *file_extra, + my_off_t filepos, int level, + uchar *buff, uint length, + uint block_length, int force_write) +{ + if (keycache->key_cache_inited && keycache->can_be_used) + return keycache->interface_funcs->write(keycache->keycache_cb, + file, file_extra, + filepos, level, + buff, length, + block_length, force_write); + + /* We can't use mutex here as the key cache may not be initialized */ + keycache->global_cache_w_requests++; + keycache->global_cache_write++; + if (my_pwrite(file, buff, length, filepos, MYF(MY_NABP | MY_WAIT_IF_FULL))) + return 1; + + return 0; +} + + +/* + Flush all blocks for a file from key buffers of a key cache + + SYNOPSIS + + flush_key_blocks() + keycache pointer to the key cache whose blocks are to be flushed + file handler for the file to flush to + file_extra maps of key cache (used for partitioned key caches) + flush_type type of the flush operation + + DESCRIPTION + The function operates over buffers of the key cache keycache. + In a general case the function flushes the data from all dirty key + buffers related to the file 'file' into this file. The function does + exactly this if the value of the parameter type is FLUSH_KEEP. If the + value of this parameter is FLUSH_RELEASE, the function additionally + releases the key buffers containing data from 'file' for new usage. + If the value of the parameter type is FLUSH_IGNORE_CHANGED the function + just releases the key buffers containing data from 'file'. + If the value of the parameter type is FLUSH_KEEP the function may use + the value of the parameter file_extra pointing to possibly dirty + partitions to optimize the operation for partitioned key caches. + + RETURN + 0 ok + 1 error + + NOTES + Any implementation of the function may exploit the fact that the function + is called only when a thread has got an exclusive lock for the key file. +*/ + +int flush_key_blocks(KEY_CACHE *keycache, + int file, void *file_extra, + enum flush_type type) +{ + if (keycache->key_cache_inited) + return keycache->interface_funcs->flush(keycache->keycache_cb, + file, file_extra, type); + return 0; +} + + +/* + Reset the counters of a key cache + + SYNOPSIS + reset_key_cache_counters() + name the name of a key cache (unused) + keycache pointer to the key cache for which to reset counters + + DESCRIPTION + This function resets the values of the statistical counters for the key + cache keycache. + The parameter name is currently not used. + + RETURN + 0 on success (always because it can't fail) + + NOTES + This procedure is used by process_key_caches() to reset the counters of all + currently used key caches, both the default one and the named ones. +*/ + +int reset_key_cache_counters(const char *name __attribute__((unused)), + KEY_CACHE *keycache) +{ + if (keycache->key_cache_inited) + { + + return keycache->interface_funcs->reset_counters(name, + keycache->keycache_cb); + } + return 0; +} + + +/* + Get statistics for a key cache + + SYNOPSIS + get_key_cache_statistics() + keycache pointer to the key cache to get statistics for + partition_no partition number to get statistics for + key_cache_stats OUT pointer to the structure for the returned statistics + + DESCRIPTION + If the value of the parameter partition_no is equal to 0 then statistics + for the whole key cache keycache (aggregated statistics) is returned in the + fields of the structure key_cache_stat of the type KEY_CACHE_STATISTICS. + Otherwise the value of the parameter partition_no makes sense only for + a partitioned key cache. In this case the function returns statistics + for the partition with the specified number partition_no. + + RETURN + none +*/ + +void get_key_cache_statistics(KEY_CACHE *keycache, uint partition_no, + KEY_CACHE_STATISTICS *key_cache_stats) +{ + if (keycache->key_cache_inited) + { + keycache->interface_funcs->get_stats(keycache->keycache_cb, + partition_no, key_cache_stats); + } +} + + +/* + Get the value of a statistical variable for a key cache + + SYNOPSIS + get_key_cache_stat_value() + keycache pointer to the key cache to get statistics for + var_no the ordered number of a statistical variable + + DESCRIPTION + This function returns the value of the statistical variable var_no for + the key cache keycache. The variables are numbered starting from 0 to 6. + + RETURN + The value of the specified statistical variable. + + NOTES + Currently for any key cache the function can return values for the + following 7 statistical variables: + + Name Number + + blocks_used 0 + blocks_unused 1 + blocks_changed 2 + read_requests 3 + reads 4 + write_requests 5 + writes 6 +*/ + +ulonglong get_key_cache_stat_value(KEY_CACHE *keycache, uint var_no) +{ + if (keycache->key_cache_inited) + { + return keycache->interface_funcs->get_stat_val(keycache->keycache_cb, + var_no); + } + else + return 0; +} + + +/* + Repartition a key cache + + SYNOPSIS + repartition_key_cache() + keycache pointer to the key cache to be repartitioned + key_cache_block_size size of blocks to keep cached data + use_mem total memory to use for the new key cache + division_limit new division limit (if not zero) + age_threshold new age threshold (if not zero) + partitions new number of partitions in the key cache + + DESCRIPTION + The function operates over the key cache keycache. + The parameter partitions specifies the number of partitions in the key + cache after repartitioning. If the value of this parameter is 0 then + a simple key cache must be created instead of the old one. + The parameter key_cache_block_size specifies the new size of the block + buffers in the key cache. The parameters division_limit and age_threshold + determine the new initial values of those characteristics of the key cache + that are used for midpoint insertion strategy. The parameter use_mem + specifies the total amount of memory to be allocated for the new key + cache buffers and for all auxiliary structures. + + RETURN VALUE + number of blocks in the key cache, if successful, + 0 - otherwise. + + NOTES + The function does not block the calls and executions of other functions + from the key cache interface. However it assumes that the calls of + resize_key_cache itself are serialized. + + Currently the function is called when the value of the variable + key_cache_partitions is being reset for the key cache keycache. +*/ + +int repartition_key_cache(KEY_CACHE *keycache, uint key_cache_block_size, + size_t use_mem, uint division_limit, + uint age_threshold, uint partitions) +{ + uint blocks= -1; + if (keycache->key_cache_inited) + { + keycache->interface_funcs->resize(keycache->keycache_cb, + key_cache_block_size, 0, + division_limit, age_threshold); + end_key_cache(keycache, 1); + blocks= init_key_cache(keycache, key_cache_block_size, use_mem, + division_limit, age_threshold, partitions); + } + return blocks; +} + === modified file 'sql/handler.cc' --- a/sql/handler.cc 2010-04-01 09:04:26 +0000 +++ b/sql/handler.cc 2010-04-03 20:19:35 +0000 @@ -3826,11 +3826,13 @@ int ha_init_key_cache(const char *name, uint tmp_block_size= (uint) key_cache->param_block_size; uint division_limit= key_cache->param_division_limit; uint age_threshold= key_cache->param_age_threshold; + uint partitions= key_cache->param_partitions; pthread_mutex_unlock(&LOCK_global_system_variables); DBUG_RETURN(!init_key_cache(key_cache, tmp_block_size, tmp_buff_size, - division_limit, age_threshold)); + division_limit, age_threshold, + partitions)); } DBUG_RETURN(0); } @@ -3860,10 +3862,12 @@ int ha_resize_key_cache(KEY_CACHE *key_c /** - Change parameters for key cache (like size) + Change parameters for key cache (like division_limit) */ int ha_change_key_cache_param(KEY_CACHE *key_cache) { + DBUG_ENTER("ha_change_key_cache_param"); + if (key_cache->key_cache_inited) { pthread_mutex_lock(&LOCK_global_system_variables); @@ -3872,9 +3876,35 @@ int ha_change_key_cache_param(KEY_CACHE pthread_mutex_unlock(&LOCK_global_system_variables); change_key_cache_param(key_cache, division_limit, age_threshold); } - return 0; + DBUG_RETURN(0); } + +/** + Repartition key cache +*/ +int ha_repartition_key_cache(KEY_CACHE *key_cache) +{ + DBUG_ENTER("ha_repartition_key_cache"); + + if (key_cache->key_cache_inited) + { + pthread_mutex_lock(&LOCK_global_system_variables); + size_t tmp_buff_size= (size_t) key_cache->param_buff_size; + long tmp_block_size= (long) key_cache->param_block_size; + uint division_limit= key_cache->param_division_limit; + uint age_threshold= key_cache->param_age_threshold; + uint partitions= key_cache->param_partitions; + pthread_mutex_unlock(&LOCK_global_system_variables); + DBUG_RETURN(!repartition_key_cache(key_cache, tmp_block_size, + tmp_buff_size, + division_limit, age_threshold, + partitions)); + } + DBUG_RETURN(0); +} + + /** Free memory allocated by a key cache. */ === modified file 'sql/handler.h' --- a/sql/handler.h 2010-03-25 13:33:39 +0000 +++ b/sql/handler.h 2010-03-29 21:16:12 +0000 @@ -2201,6 +2201,7 @@ int ha_table_exists_in_engine(THD* thd, extern "C" int ha_init_key_cache(const char *name, KEY_CACHE *key_cache); int ha_resize_key_cache(KEY_CACHE *key_cache); int ha_change_key_cache_param(KEY_CACHE *key_cache); +int ha_repartition_key_cache(KEY_CACHE *key_cache); int ha_change_key_cache(KEY_CACHE *old_key_cache, KEY_CACHE *new_key_cache); int ha_end_key_cache(KEY_CACHE *key_cache); === modified file 'sql/mysqld.cc' --- a/sql/mysqld.cc 2010-04-02 09:20:09 +0000 +++ b/sql/mysqld.cc 2010-04-03 20:19:35 +0000 @@ -5831,6 +5831,7 @@ enum options_mysqld OPT_INTERACTIVE_TIMEOUT, OPT_JOIN_BUFF_SIZE, OPT_KEY_BUFFER_SIZE, OPT_KEY_CACHE_BLOCK_SIZE, OPT_KEY_CACHE_DIVISION_LIMIT, OPT_KEY_CACHE_AGE_THRESHOLD, + OPT_KEY_CACHE_PARTITIONS, OPT_LONG_QUERY_TIME, OPT_LOWER_CASE_TABLE_NAMES, OPT_MAX_ALLOWED_PACKET, OPT_MAX_BINLOG_CACHE_SIZE, OPT_MAX_BINLOG_SIZE, @@ -6928,6 +6929,12 @@ log and this option does nothing anymore (uchar**) 0, 0, (GET_ULONG | GET_ASK_ADDR) , REQUIRED_ARG, 100, 1, 100, 0, 1, 0}, + {"key_cache_partitions", OPT_KEY_CACHE_PARTITIONS, + "The number of partitions in key cache", + (uchar**) &dflt_key_cache_var.param_partitions, + (uchar**) 0, + 0, (GET_ULONG | GET_ASK_ADDR), REQUIRED_ARG, DEFAULT_KEY_CACHE_PARTITIONS, + 0, MAX_KEY_CACHE_PARTITIONS, 0, 1, 0}, {"log-slow-filter", OPT_LOG_SLOW_FILTER, "Log only the queries that followed certain execution plan. Multiple flags allowed in a comma-separated string. [admin, filesort, filesort_on_disk, full_join, full_scan, query_cache, query_cache_miss, tmp_table, tmp_table_on_disk]. Sets log-slow-admin-command to ON", 0, 0, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, QPLAN_ALWAYS_SET, 0, 0}, @@ -8910,6 +8917,7 @@ mysql_getopt_value(const char *keyname, case OPT_KEY_CACHE_BLOCK_SIZE: case OPT_KEY_CACHE_DIVISION_LIMIT: case OPT_KEY_CACHE_AGE_THRESHOLD: + case OPT_KEY_CACHE_PARTITIONS: { KEY_CACHE *key_cache; if (!(key_cache= get_or_create_key_cache(keyname, key_length))) @@ -8927,6 +8935,8 @@ mysql_getopt_value(const char *keyname, return (uchar**) &key_cache->param_division_limit; case OPT_KEY_CACHE_AGE_THRESHOLD: return (uchar**) &key_cache->param_age_threshold; + case OPT_KEY_CACHE_PARTITIONS: + return (uchar**) &key_cache->param_partitions; } } } === modified file 'sql/set_var.cc' --- a/sql/set_var.cc 2010-04-01 09:04:26 +0000 +++ b/sql/set_var.cc 2010-04-03 20:19:35 +0000 @@ -320,15 +320,18 @@ static sys_var_thd_ulong sys_interactive static sys_var_thd_ulong sys_join_buffer_size(&vars, "join_buffer_size", &SV::join_buff_size); static sys_var_key_buffer_size sys_key_buffer_size(&vars, "key_buffer_size"); -static sys_var_key_cache_long sys_key_cache_block_size(&vars, "key_cache_block_size", - offsetof(KEY_CACHE, - param_block_size)); -static sys_var_key_cache_long sys_key_cache_division_limit(&vars, "key_cache_division_limit", - offsetof(KEY_CACHE, - param_division_limit)); -static sys_var_key_cache_long sys_key_cache_age_threshold(&vars, "key_cache_age_threshold", - offsetof(KEY_CACHE, - param_age_threshold)); +static sys_var_key_cache_long sys_key_cache_block_size(&vars, + "key_cache_block_size", + offsetof(KEY_CACHE,param_block_size)); +static sys_var_key_cache_long sys_key_cache_division_limit(&vars, + "key_cache_division_limit", + offsetof(KEY_CACHE, param_division_limit)); +static sys_var_key_cache_long sys_key_cache_age_threshold(&vars, + "key_cache_age_threshold", + offsetof(KEY_CACHE, param_age_threshold)); +static sys_var_key_cache_long sys_key_cache_partitions(&vars, + "key_cache_partitions", + offsetof(KEY_CACHE, param_partitions)); static sys_var_const sys_language(&vars, "language", OPT_GLOBAL, SHOW_CHAR, (uchar*) language); @@ -2548,7 +2551,21 @@ bool sys_var_key_cache_long::update(THD pthread_mutex_unlock(&LOCK_global_system_variables); - error= (bool) (ha_resize_key_cache(key_cache)); + switch (offset) { + + case offsetof(KEY_CACHE, param_block_size): + error= (bool) (ha_resize_key_cache(key_cache)); + break; + + case offsetof(KEY_CACHE, param_division_limit): + case offsetof(KEY_CACHE, param_age_threshold): + error= (bool) (ha_change_key_cache_param(key_cache)); + break; + + case offsetof(KEY_CACHE, param_partitions): + error= (bool) (ha_repartition_key_cache(key_cache)); + break; + } pthread_mutex_lock(&LOCK_global_system_variables); key_cache->in_init= 0; @@ -4156,6 +4173,7 @@ static KEY_CACHE *create_key_cache(const key_cache->param_block_size= dflt_key_cache_var.param_block_size; key_cache->param_division_limit= dflt_key_cache_var.param_division_limit; key_cache->param_age_threshold= dflt_key_cache_var.param_age_threshold; + key_cache->param_partitions= dflt_key_cache_var.param_partitions; } } DBUG_RETURN(key_cache); === modified file 'sql/set_var.h' --- a/sql/set_var.h 2009-12-03 11:19:05 +0000 +++ b/sql/set_var.h 2010-02-16 16:41:11 +0000 @@ -1427,6 +1427,7 @@ public: my_free((uchar*) name, MYF(0)); } friend bool process_key_caches(process_key_cache_t func); + friend int fill_key_cache_tables(THD *thd, TABLE_LIST *tables, COND *cond); friend void delete_elements(I_List<NAMED_LIST> *list, void (*free_element)(const char*, uchar*)); }; === modified file 'sql/sql_show.cc' --- a/sql/sql_show.cc 2010-04-02 09:20:09 +0000 +++ b/sql/sql_show.cc 2010-04-06 02:08:10 +0000 @@ -2249,6 +2249,32 @@ void remove_status_vars(SHOW_VAR *list) } + +static void update_key_cache_stat_var(KEY_CACHE *key_cache, size_t ofs) +{ + uint var_no; + switch (ofs) { + case offsetof(KEY_CACHE, blocks_used): + case offsetof(KEY_CACHE, blocks_unused): + case offsetof(KEY_CACHE, global_blocks_changed): + var_no= (ofs-offsetof(KEY_CACHE, blocks_used))/sizeof(ulong); + *(ulong *)((char *) key_cache + ofs)= + (ulong) get_key_cache_stat_value(key_cache, var_no); + break; + case offsetof(KEY_CACHE, global_cache_r_requests): + case offsetof(KEY_CACHE, global_cache_read): + case offsetof(KEY_CACHE, global_cache_w_requests): + case offsetof(KEY_CACHE, global_cache_write): + var_no= NUM_LONG_KEY_CACHE_STAT_VARIABLES + + (ofs-offsetof(KEY_CACHE, global_cache_w_requests))/ + sizeof(ulonglong); + *(ulonglong *)((char *) key_cache + ofs)= + get_key_cache_stat_value(key_cache, var_no); + break; + } +} + + static bool show_status_array(THD *thd, const char *wild, SHOW_VAR *variables, enum enum_var_type value_type, @@ -2381,10 +2407,12 @@ static bool show_status_array(THD *thd, break; } case SHOW_KEY_CACHE_LONG: + update_key_cache_stat_var(dflt_key_cache, (size_t) value); value= (char*) dflt_key_cache + (ulong)value; end= int10_to_str(*(long*) value, buff, 10); break; case SHOW_KEY_CACHE_LONGLONG: + update_key_cache_stat_var(dflt_key_cache, (size_t) value); value= (char*) dflt_key_cache + (ulong)value; end= longlong10_to_str(*(longlong*) value, buff, 10); break; @@ -6640,6 +6668,90 @@ int fill_schema_files(THD *thd, TABLE_LI } +static +int store_key_cache_table_record(THD *thd, TABLE *table, + const char *name, uint name_length, + KEY_CACHE *key_cache, + uint partitions, uint partition_no) +{ + KEY_CACHE_STATISTICS keycache_stats; + uint err; + DBUG_ENTER("store_key_cache_table_record"); + + get_key_cache_statistics(key_cache, partition_no, &keycache_stats); + + if (!key_cache->key_cache_inited || keycache_stats.mem_size == 0) + DBUG_RETURN(0); + + restore_record(table, s->default_values); + table->field[0]->store(name, name_length, system_charset_info); + if (partitions == 0) + table->field[1]->set_null(); + else + { + table->field[1]->set_notnull(); + table->field[1]->store((long) partitions, TRUE); + } + + if (partition_no == 0) + table->field[2]->set_null(); + else + { + table->field[2]->set_notnull(); + table->field[2]->store((long) partition_no, TRUE); + } + table->field[3]->store(keycache_stats.mem_size, TRUE); + table->field[4]->store(keycache_stats.block_size, TRUE); + table->field[5]->store(keycache_stats.blocks_used, TRUE); + table->field[6]->store(keycache_stats.blocks_unused, TRUE); + table->field[7]->store(keycache_stats.blocks_changed, TRUE); + table->field[8]->store(keycache_stats.read_requests, TRUE); + table->field[9]->store(keycache_stats.reads, TRUE); + table->field[10]->store(keycache_stats.write_requests, TRUE); + table->field[11]->store(keycache_stats.writes, TRUE); + + err= schema_table_store_record(thd, table); + DBUG_RETURN(err); +} + + +int fill_key_cache_tables(THD *thd, TABLE_LIST *tables, COND *cond) +{ + TABLE *table= tables->table; + I_List_iterator<NAMED_LIST> it(key_caches); + NAMED_LIST *element; + DBUG_ENTER("fill_key_cache_tables"); + + while ((element= it++)) + { + KEY_CACHE *key_cache= (KEY_CACHE *) element->data; + + if (!key_cache->key_cache_inited) + continue; + + uint partitions= key_cache->partitions; + DBUG_ASSERT(partitions <= MAX_KEY_CACHE_PARTITIONS); + + if (partitions) + { + for (uint i= 0; i < partitions; i++) + { + if (store_key_cache_table_record(thd, table, + element->name, element->name_length, + key_cache, partitions, i+1)) + DBUG_RETURN(1); + } + } + + if (store_key_cache_table_record(thd, table, + element->name, element->name_length, + key_cache, partitions, 0)) + DBUG_RETURN(1); + } + DBUG_RETURN(0); +} + + ST_FIELD_INFO schema_fields_info[]= { {"CATALOG_NAME", FN_REFLEN, MYSQL_TYPE_STRING, 0, 1, 0, SKIP_OPEN_TABLE}, @@ -7219,6 +7331,35 @@ ST_FIELD_INFO referential_constraints_fi }; +ST_FIELD_INFO keycache_fields_info[]= +{ + {"KEY_CACHE_NAME", NAME_LEN, MYSQL_TYPE_STRING, 0, 0, 0, SKIP_OPEN_TABLE}, + {"PARTITIONS", 3, MYSQL_TYPE_LONG, 0, + (MY_I_S_MAYBE_NULL | MY_I_S_UNSIGNED) , 0, SKIP_OPEN_TABLE}, + {"PARTITION_NUMBER", 3, MYSQL_TYPE_LONG, 0, + (MY_I_S_MAYBE_NULL | MY_I_S_UNSIGNED), 0, SKIP_OPEN_TABLE}, + {"FULL_SIZE", MY_INT64_NUM_DECIMAL_DIGITS, MYSQL_TYPE_LONGLONG, 0, + (MY_I_S_UNSIGNED), 0, SKIP_OPEN_TABLE}, + {"BLOCK_SIZE", MY_INT64_NUM_DECIMAL_DIGITS, MYSQL_TYPE_LONGLONG, 0, + (MY_I_S_UNSIGNED), 0, SKIP_OPEN_TABLE }, + {"USED_BLOCKS", MY_INT64_NUM_DECIMAL_DIGITS, MYSQL_TYPE_LONGLONG, 0, + (MY_I_S_UNSIGNED), "Key_blocks_used", SKIP_OPEN_TABLE}, + {"UNUSED_BLOCKS", MY_INT64_NUM_DECIMAL_DIGITS, MYSQL_TYPE_LONGLONG, 0, + (MY_I_S_UNSIGNED), "Key_blocks_unused", SKIP_OPEN_TABLE}, + {"DIRTY_BLOCKS", MY_INT64_NUM_DECIMAL_DIGITS, MYSQL_TYPE_LONGLONG, 0, + (MY_I_S_UNSIGNED), "Key_blocks_not_flushed", SKIP_OPEN_TABLE}, + {"READ_REQUESTS", MY_INT64_NUM_DECIMAL_DIGITS, MYSQL_TYPE_LONGLONG, 0, + (MY_I_S_UNSIGNED), "Key_read_requests", SKIP_OPEN_TABLE}, + {"READS", MY_INT64_NUM_DECIMAL_DIGITS, MYSQL_TYPE_LONGLONG, 0, + (MY_I_S_UNSIGNED), "Key_reads", SKIP_OPEN_TABLE}, + {"WRITE_REQUESTS", MY_INT64_NUM_DECIMAL_DIGITS, MYSQL_TYPE_LONGLONG, 0, + (MY_I_S_UNSIGNED), "Key_write_requests", SKIP_OPEN_TABLE}, + {"WRITES", MY_INT64_NUM_DECIMAL_DIGITS, MYSQL_TYPE_LONGLONG, 0, + (MY_I_S_UNSIGNED), "Key_writes", SKIP_OPEN_TABLE}, + {0, 0, MYSQL_TYPE_STRING, 0, 0, 0, SKIP_OPEN_TABLE} +}; + + /* Description of ST_FIELD_INFO in table.h @@ -7258,6 +7399,8 @@ ST_SCHEMA_TABLE schema_tables[]= fill_variables, make_old_format, 0, 0, -1, 0, 0}, {"INDEX_STATISTICS", index_stats_fields_info, create_schema_table, fill_schema_index_stats, make_old_format, 0, -1, -1, 0, 0}, + {"KEY_CACHES", keycache_fields_info, create_schema_table, + fill_key_cache_tables, make_old_format, 0, -1,-1, 0, 0}, {"KEY_COLUMN_USAGE", key_column_usage_fields_info, create_schema_table, get_all_tables, 0, get_schema_key_column_usage_record, 4, 5, 0, OPEN_TABLE_ONLY}, === modified file 'sql/sql_test.cc' --- a/sql/sql_test.cc 2010-03-04 08:03:07 +0000 +++ b/sql/sql_test.cc 2010-03-29 21:16:12 +0000 @@ -445,7 +445,8 @@ static int print_key_cache_status(const Buffer_size: %10lu\n\ Block_size: %10lu\n\ Division_limit: %10lu\n\ -Age_limit: %10lu\n\ +Age_threshold: %10lu\n\ +Partitions: %10lu\n\ blocks used: %10lu\n\ not flushed: %10lu\n\ w_requests: %10s\n\ @@ -455,6 +456,7 @@ reads: %10s\n\n", name, (ulong) key_cache->param_buff_size, key_cache->param_block_size, key_cache->param_division_limit, key_cache->param_age_threshold, + key_cache->param_partitions, key_cache->blocks_used,key_cache->global_blocks_changed, llstr(key_cache->global_cache_w_requests,llbuff1), llstr(key_cache->global_cache_write,llbuff2), === modified file 'sql/table.h' --- a/sql/table.h 2010-02-12 08:47:31 +0000 +++ b/sql/table.h 2010-02-16 16:41:11 +0000 @@ -953,6 +953,7 @@ enum enum_schema_tables SCH_GLOBAL_STATUS, SCH_GLOBAL_VARIABLES, SCH_INDEX_STATS, + SCH_KEY_CACHES, SCH_KEY_COLUMN_USAGE, SCH_OPEN_TABLES, SCH_PARTITIONS, === modified file 'storage/myisam/mi_check.c' --- a/storage/myisam/mi_check.c 2010-01-14 16:51:00 +0000 +++ b/storage/myisam/mi_check.c 2010-02-16 16:41:11 +0000 @@ -332,7 +332,8 @@ int chk_size(HA_CHECK *param, register M /* The following is needed if called externally (not from myisamchk) */ flush_key_blocks(info->s->key_cache, - info->s->kfile, FLUSH_FORCE_WRITE); + info->s->kfile, &info->s->dirty_part_map, + FLUSH_FORCE_WRITE); size= my_seek(info->s->kfile, 0L, MY_SEEK_END, MYF(MY_THREADSAFE)); if ((skr=(my_off_t) info->state->key_file_length) != size) @@ -1474,6 +1475,7 @@ static int mi_drop_all_indexes(HA_CHECK */ DBUG_PRINT("repair", ("all disabled are empty: create missing")); error= flush_key_blocks(share->key_cache, share->kfile, + &share->dirty_part_map, FLUSH_FORCE_WRITE); goto end; } @@ -1488,6 +1490,7 @@ static int mi_drop_all_indexes(HA_CHECK /* Remove all key blocks of this index file from key cache. */ if ((error= flush_key_blocks(share->key_cache, share->kfile, + &share->dirty_part_map, FLUSH_IGNORE_CHANGED))) goto end; /* purecov: inspected */ @@ -1549,7 +1552,7 @@ int mi_repair(HA_CHECK *param, register if (!param->using_global_keycache) VOID(init_key_cache(dflt_key_cache, param->key_cache_block_size, - (size_t) param->use_buffers, 0, 0)); + (size_t) param->use_buffers, 0, 0, 0)); if (init_io_cache(¶m->read_cache,info->dfile, (uint) param->read_buffer_length, @@ -1762,7 +1765,8 @@ err: VOID(end_io_cache(¶m->read_cache)); info->opt_flag&= ~(READ_CACHE_USED | WRITE_CACHE_USED); VOID(end_io_cache(&info->rec_cache)); - got_error|=flush_blocks(param, share->key_cache, share->kfile); + got_error|=flush_blocks(param, share->key_cache, share->kfile, + &share->dirty_part_map); if (!got_error && param->testflag & T_UNPACK) { share->state.header.options[0]&= (uchar) ~HA_OPTION_COMPRESS_RECORD; @@ -1908,9 +1912,10 @@ void lock_memory(HA_CHECK *param __attri /* Flush all changed blocks to disk */ -int flush_blocks(HA_CHECK *param, KEY_CACHE *key_cache, File file) +int flush_blocks(HA_CHECK *param, KEY_CACHE *key_cache, File file, + ulonglong *dirty_part_map) { - if (flush_key_blocks(key_cache, file, FLUSH_RELEASE)) + if (flush_key_blocks(key_cache, file, dirty_part_map, FLUSH_RELEASE)) { mi_check_print_error(param,"%d when trying to write bufferts",my_errno); return(1); @@ -1977,7 +1982,8 @@ int mi_sort_index(HA_CHECK *param, regis } /* Flush key cache for this file if we are calling this outside myisamchk */ - flush_key_blocks(share->key_cache,share->kfile, FLUSH_IGNORE_CHANGED); + flush_key_blocks(share->key_cache, share->kfile, &share->dirty_part_map, + FLUSH_IGNORE_CHANGED); share->state.version=(ulong) time((time_t*) 0); old_state= share->state; /* save state if not stored */ @@ -2535,7 +2541,8 @@ int mi_repair_by_sort(HA_CHECK *param, r memcpy( &share->state.state, info->state, sizeof(*info->state)); err: - got_error|= flush_blocks(param, share->key_cache, share->kfile); + got_error|= flush_blocks(param, share->key_cache, share->kfile, + &share->dirty_part_map); VOID(end_io_cache(&info->rec_cache)); if (!got_error) { @@ -3059,7 +3066,8 @@ int mi_repair_parallel(HA_CHECK *param, memcpy(&share->state.state, info->state, sizeof(*info->state)); err: - got_error|= flush_blocks(param, share->key_cache, share->kfile); + got_error|= flush_blocks(param, share->key_cache, share->kfile, + &share->dirty_part_map); /* Destroy the write cache. The master thread did already detach from the share by remove_io_thread() or it was not yet started (if the === modified file 'storage/myisam/mi_close.c' --- a/storage/myisam/mi_close.c 2010-02-10 19:06:24 +0000 +++ b/storage/myisam/mi_close.c 2010-02-16 16:41:11 +0000 @@ -64,6 +64,7 @@ int mi_close(register MI_INFO *info) if (share->kfile >= 0) abort();); if (share->kfile >= 0 && flush_key_blocks(share->key_cache, share->kfile, + &share->dirty_part_map, ((share->temporary || share->deleting) ? FLUSH_IGNORE_CHANGED : FLUSH_RELEASE))) === modified file 'storage/myisam/mi_delete_all.c' --- a/storage/myisam/mi_delete_all.c 2008-04-28 16:24:05 +0000 +++ b/storage/myisam/mi_delete_all.c 2010-02-16 16:41:11 +0000 @@ -52,7 +52,8 @@ int mi_delete_all_rows(MI_INFO *info) If we are using delayed keys or if the user has done changes to the tables since it was locked then there may be key blocks in the key cache */ - flush_key_blocks(share->key_cache, share->kfile, FLUSH_IGNORE_CHANGED); + flush_key_blocks(share->key_cache, share->kfile, &share->dirty_part_map, + FLUSH_IGNORE_CHANGED); #ifdef HAVE_MMAP if (share->file_map) _mi_unmap_file(info); === modified file 'storage/myisam/mi_extra.c' --- a/storage/myisam/mi_extra.c 2010-02-10 19:06:24 +0000 +++ b/storage/myisam/mi_extra.c 2010-02-16 16:41:11 +0000 @@ -268,6 +268,7 @@ int mi_extra(MI_INFO *info, enum ha_extr pthread_mutex_lock(&share->intern_lock); /* Flush pages that we don't need anymore */ if (flush_key_blocks(share->key_cache, share->kfile, + &share->dirty_part_map, (function == HA_EXTRA_PREPARE_FOR_DROP ? FLUSH_IGNORE_CHANGED : FLUSH_RELEASE))) { @@ -326,7 +327,8 @@ int mi_extra(MI_INFO *info, enum ha_extr break; case HA_EXTRA_FLUSH: if (!share->temporary) - flush_key_blocks(share->key_cache, share->kfile, FLUSH_KEEP); + flush_key_blocks(share->key_cache, share->kfile, &share->dirty_part_map, + FLUSH_KEEP); #ifdef HAVE_PWRITE _mi_decrement_open_count(info); #endif === modified file 'storage/myisam/mi_keycache.c' --- a/storage/myisam/mi_keycache.c 2008-03-29 15:56:33 +0000 +++ b/storage/myisam/mi_keycache.c 2010-02-16 16:41:11 +0000 @@ -75,7 +75,8 @@ int mi_assign_to_key_cache(MI_INFO *info in the old key cache. */ - if (flush_key_blocks(share->key_cache, share->kfile, FLUSH_RELEASE)) + if (flush_key_blocks(share->key_cache, share->kfile, &share->dirty_part_map, + FLUSH_RELEASE)) { error= my_errno; mi_print_error(info->s, HA_ERR_CRASHED); @@ -90,7 +91,8 @@ int mi_assign_to_key_cache(MI_INFO *info (This can never fail as there is never any not written data in the new key cache) */ - (void) flush_key_blocks(key_cache, share->kfile, FLUSH_RELEASE); + (void) flush_key_blocks(key_cache, share->kfile, &share->dirty_part_map, + FLUSH_RELEASE); /* ensure that setting the key cache and changing the multi_key_cache @@ -102,6 +104,7 @@ int mi_assign_to_key_cache(MI_INFO *info This should be seen at the lastes for the next call to an myisam function. */ share->key_cache= key_cache; + share->dirty_part_map= 0; /* store the key cache in the global hash structure for future opens */ if (multi_key_cache_set((uchar*) share->unique_file_name, === modified file 'storage/myisam/mi_locking.c' --- a/storage/myisam/mi_locking.c 2009-10-06 06:57:22 +0000 +++ b/storage/myisam/mi_locking.c 2010-02-16 16:41:11 +0000 @@ -68,7 +68,9 @@ int mi_lock_database(MI_INFO *info, int --share->tot_locks; if (info->lock_type == F_WRLCK && !share->w_locks && !share->delay_key_write && flush_key_blocks(share->key_cache, - share->kfile,FLUSH_KEEP)) + share->kfile, + &share->dirty_part_map, + FLUSH_KEEP)) { error=my_errno; mi_print_error(info->s, HA_ERR_CRASHED); @@ -513,7 +515,8 @@ int _mi_test_if_changed(register MI_INFO { /* Keyfile has changed */ DBUG_PRINT("info",("index file changed")); if (share->state.process != share->this_process) - VOID(flush_key_blocks(share->key_cache, share->kfile, FLUSH_RELEASE)); + VOID(flush_key_blocks(share->key_cache, share->kfile, + &share->dirty_part_map, FLUSH_RELEASE)); share->last_process=share->state.process; info->last_unique= share->state.unique; info->last_loop= share->state.update_count; === modified file 'storage/myisam/mi_page.c' --- a/storage/myisam/mi_page.c 2009-05-06 12:03:24 +0000 +++ b/storage/myisam/mi_page.c 2010-02-16 16:41:11 +0000 @@ -94,10 +94,11 @@ int _mi_write_keypage(register MI_INFO * } #endif DBUG_RETURN((key_cache_write(info->s->key_cache, - info->s->kfile,page, level, (uchar*) buff,length, - (uint) keyinfo->block_length, - (int) ((info->lock_type != F_UNLCK) || - info->s->delay_key_write)))); + info->s->kfile, &info->s->dirty_part_map, + page, level, (uchar*) buff, length, + (uint) keyinfo->block_length, + (int) ((info->lock_type != F_UNLCK) || + info->s->delay_key_write)))); } /* mi_write_keypage */ @@ -116,7 +117,8 @@ int _mi_dispose(register MI_INFO *info, mi_sizestore(buff,old_link); info->s->state.changed|= STATE_NOT_SORTED_PAGES; DBUG_RETURN(key_cache_write(info->s->key_cache, - info->s->kfile, pos , level, buff, + info->s->kfile, &info->s->dirty_part_map, + pos , level, buff, sizeof(buff), (uint) keyinfo->block_length, (int) (info->lock_type != F_UNLCK))); === modified file 'storage/myisam/mi_panic.c' --- a/storage/myisam/mi_panic.c 2006-12-31 00:32:21 +0000 +++ b/storage/myisam/mi_panic.c 2010-02-16 16:41:11 +0000 @@ -47,7 +47,8 @@ int mi_panic(enum ha_panic_function flag if (info->s->options & HA_OPTION_READ_ONLY_DATA) break; #endif - if (flush_key_blocks(info->s->key_cache, info->s->kfile, FLUSH_RELEASE)) + if (flush_key_blocks(info->s->key_cache, info->s->kfile, + &info->s->dirty_part_map, FLUSH_RELEASE)) error=my_errno; if (info->opt_flag & WRITE_CACHE_USED) if (flush_io_cache(&info->rec_cache)) === modified file 'storage/myisam/mi_preload.c' --- a/storage/myisam/mi_preload.c 2009-09-09 15:13:13 +0000 +++ b/storage/myisam/mi_preload.c 2010-02-16 16:41:11 +0000 @@ -65,7 +65,7 @@ int mi_preload(MI_INFO *info, ulonglong } } else - block_length= share->key_cache->key_cache_block_size; + block_length= share->key_cache->param_block_size; length= info->preload_buff_size/block_length * block_length; set_if_bigger(length, block_length); @@ -73,7 +73,8 @@ int mi_preload(MI_INFO *info, ulonglong if (!(buff= (uchar *) my_malloc(length, MYF(MY_WME)))) DBUG_RETURN(my_errno= HA_ERR_OUT_OF_MEM); - if (flush_key_blocks(share->key_cache,share->kfile, FLUSH_RELEASE)) + if (flush_key_blocks(share->key_cache, share->kfile, &share->dirty_part_map, + FLUSH_RELEASE)) goto err; do === modified file 'storage/myisam/mi_test1.c' --- a/storage/myisam/mi_test1.c 2008-04-28 16:24:05 +0000 +++ b/storage/myisam/mi_test1.c 2010-02-16 16:41:11 +0000 @@ -49,7 +49,8 @@ int main(int argc,char *argv[]) MY_INIT(argv[0]); my_init(); if (key_cacheing) - init_key_cache(dflt_key_cache,KEY_CACHE_BLOCK_SIZE,IO_SIZE*16,0,0); + init_key_cache(dflt_key_cache,KEY_CACHE_BLOCK_SIZE,IO_SIZE*16,0,0, + DEFAULT_KEY_CACHE_PARTITIONS); get_options(argc,argv); exit(run_test("test1")); === modified file 'storage/myisam/mi_test2.c' --- a/storage/myisam/mi_test2.c 2008-04-28 16:24:05 +0000 +++ b/storage/myisam/mi_test2.c 2010-02-16 16:41:11 +0000 @@ -215,7 +215,8 @@ int main(int argc, char *argv[]) if (!silent) printf("- Writing key:s\n"); if (key_cacheing) - init_key_cache(dflt_key_cache,key_cache_block_size,key_cache_size,0,0); + init_key_cache(dflt_key_cache,key_cache_block_size,key_cache_size,0,0, + DEFAULT_KEY_CACHE_PARTITIONS); if (do_locking) mi_lock_database(file,F_WRLCK); if (write_cacheing) === modified file 'storage/myisam/mi_test3.c' --- a/storage/myisam/mi_test3.c 2010-01-06 21:27:53 +0000 +++ b/storage/myisam/mi_test3.c 2010-02-16 16:41:11 +0000 @@ -177,7 +177,8 @@ void start_test(int id) exit(1); } if (key_cacheing && rnd(2) == 0) - init_key_cache(dflt_key_cache, KEY_CACHE_BLOCK_SIZE, 65536L, 0, 0); + init_key_cache(dflt_key_cache, KEY_CACHE_BLOCK_SIZE, 65536L, 0, 0, + DEFAULT_KEY_CACHE_PARTITIONS); printf("Process %d, pid: %ld\n", id, (long) getpid()); fflush(stdout); === modified file 'storage/myisam/myisam_ftdump.c' --- a/storage/myisam/myisam_ftdump.c 2009-11-30 13:36:06 +0000 +++ b/storage/myisam/myisam_ftdump.c 2010-02-16 16:41:11 +0000 @@ -83,7 +83,7 @@ int main(int argc,char *argv[]) usage(); } - init_key_cache(dflt_key_cache,MI_KEY_BLOCK_LENGTH,USE_BUFFER_INIT, 0, 0); + init_key_cache(dflt_key_cache,MI_KEY_BLOCK_LENGTH,USE_BUFFER_INIT, 0, 0, 0); if (!(info=mi_open(argv[0], O_RDONLY, HA_OPEN_ABORT_IF_LOCKED|HA_OPEN_FROM_SQL_LAYER))) === modified file 'storage/myisam/myisamchk.c' --- a/storage/myisam/myisamchk.c 2009-12-03 11:34:11 +0000 +++ b/storage/myisam/myisamchk.c 2010-02-16 16:41:11 +0000 @@ -1102,7 +1102,7 @@ static int myisamchk(HA_CHECK *param, ch { if (param->testflag & (T_EXTEND | T_MEDIUM)) VOID(init_key_cache(dflt_key_cache,opt_key_cache_block_size, - (size_t) param->use_buffers, 0, 0)); + (size_t) param->use_buffers, 0, 0, 0)); VOID(init_io_cache(¶m->read_cache,datafile, (uint) param->read_buffer_length, READ_CACHE, @@ -1116,7 +1116,8 @@ static int myisamchk(HA_CHECK *param, ch HA_OPTION_COMPRESS_RECORD)) || (param->testflag & (T_EXTEND | T_MEDIUM))) error|=chk_data_link(param, info, test(param->testflag & T_EXTEND)); - error|=flush_blocks(param, share->key_cache, share->kfile); + error|=flush_blocks(param, share->key_cache, share->kfile, + &share->dirty_part_map); VOID(end_io_cache(¶m->read_cache)); } if (!error) @@ -1526,7 +1527,7 @@ static int mi_sort_records(HA_CHECK *par DBUG_RETURN(0); /* Nothing to do */ init_key_cache(dflt_key_cache, opt_key_cache_block_size, - (size_t) param->use_buffers, 0, 0); + (size_t) param->use_buffers, 0, 0, 0); if (init_io_cache(&info->rec_cache,-1,(uint) param->write_buffer_length, WRITE_CACHE,share->pack.header_length,1, MYF(MY_WME | MY_WAIT_IF_FULL))) @@ -1641,8 +1642,8 @@ err: my_free(sort_info.buff,MYF(MY_ALLOW_ZERO_PTR)); sort_info.buff=0; share->state.sortkey=sort_key; - DBUG_RETURN(flush_blocks(param, share->key_cache, share->kfile) | - got_error); + DBUG_RETURN(flush_blocks(param, share->key_cache, share->kfile, + &share->dirty_part_map) | got_error); } /* sort_records */ === modified file 'storage/myisam/myisamdef.h' --- a/storage/myisam/myisamdef.h 2010-03-04 08:03:07 +0000 +++ b/storage/myisam/myisamdef.h 2010-03-29 21:16:12 +0000 @@ -174,6 +174,8 @@ typedef struct st_mi_isam_share *index_file_name; uchar *file_map; /* mem-map of file if possible */ KEY_CACHE *key_cache; /* ref to the current key cache */ + /* To mark the key cache partitions containing dirty pages for this file */ + ulonglong dirty_part_map; MI_DECODE_TREE *decode_trees; uint16 *decode_tables; /* Function to use for a row checksum. */ @@ -732,7 +734,8 @@ void mi_check_print_info _VARARGS((HA_CH #ifdef THREAD pthread_handler_t thr_find_all_keys(void *arg); #endif -int flush_blocks(HA_CHECK *param, KEY_CACHE *key_cache, File file); +int flush_blocks(HA_CHECK *param, KEY_CACHE *key_cache, File file, + ulonglong *dirty_part_map); #ifdef __cplusplus } #endif === modified file 'storage/myisam/myisamlog.c' --- a/storage/myisam/myisamlog.c 2009-11-29 23:08:56 +0000 +++ b/storage/myisam/myisamlog.c 2010-02-16 16:41:11 +0000 @@ -333,7 +333,7 @@ static int examine_log(char * file_name, init_tree(&tree,0,0,sizeof(file_info),(qsort_cmp2) file_info_compare,1, (tree_element_free) file_info_free, NULL); VOID(init_key_cache(dflt_key_cache,KEY_CACHE_BLOCK_SIZE,KEY_CACHE_SIZE, - 0, 0)); + 0, 0, 0)); files_open=0; access_time=0; while (access_time++ != number_of_commands &&