[Commits] a735c1a: MDEV-30539 EXPLAIN EXTENDED: no message with queries for DML statements
revision-id: a735c1a37ee997624eba5b8cf3b10da76f61dfc7 (mariadb-10.4.27-113-ga735c1a) parent(s): ccec9b1de95a66b7597bc30e0a60bd61866f225d author: Igor Babaev committer: Igor Babaev timestamp: 2023-03-22 20:12:59 -0700 message: MDEV-30539 EXPLAIN EXTENDED: no message with queries for DML statements EXPLAIN EXTENDED for an UPDATE/DELETE/INSERT/REPLACE statement did not produce the warning containing the text representation of the query obtained after the optimization phase. Such warning was produced for SELECT statements, but not for DML statements. The patch fixes this defect of EXPLAIN EXTENDED for DML statements. --- mysql-test/include/explain_non_select.inc | 16 + mysql-test/main/explain_non_select.result | 4 + mysql-test/main/multi_update.result | 2 +- mysql-test/main/multi_update.test | 2 +- .../main/myisam_explain_non_select_all.result | 193 ++++++++++++ mysql-test/main/opt_trace.result | 2 +- mysql-test/main/ps.result | 4 + sql/sql_delete.cc | 2 + sql/sql_explain.cc | 19 +- sql/sql_explain.h | 2 +- sql/sql_insert.cc | 6 +- sql/sql_lex.cc | 2 + sql/sql_lex.h | 6 + sql/sql_parse.cc | 20 +- sql/sql_select.cc | 326 ++++++++++++++++++--- sql/sql_update.cc | 10 +- sql/table.h | 2 + 17 files changed, 561 insertions(+), 57 deletions(-) diff --git a/mysql-test/include/explain_non_select.inc b/mysql-test/include/explain_non_select.inc index d22310c..bd0962d 100644 --- a/mysql-test/include/explain_non_select.inc +++ b/mysql-test/include/explain_non_select.inc @@ -788,6 +788,22 @@ INSERT INTO t1 VALUES (1), (2), (3), (4), (5); DROP TABLE t1; +--echo #75 + +CREATE TABLE t1 (id INT PRIMARY KEY, i INT); +--let $query = INSERT INTO t1 VALUES (3,10), (7,11), (3,11) ON DUPLICATE KEY UPDATE id=LAST_INSERT_ID(id); +--source include/explain_utils.inc +DROP TABLE t1; + +--echo #76 + +CREATE TABLE t1 (id INT PRIMARY KEY, i INT); +CREATE TABLE t2 (a INT, b INT); +INSERT INTO t2 VALUES (1,10), (3,10), (7,11), (3,11); +--let $query = INSERT INTO t1 SELECT * FROM t2 ON DUPLICATE KEY UPDATE id=LAST_INSERT_ID(id); +--source include/explain_utils.inc +DROP TABLE t1,t2; + --echo # --echo # Bug #12949629: CLIENT LOSES CONNECTION AFTER EXECUTING A PROCEDURE WITH --echo # EXPLAIN UPDATE/DEL/INS diff --git a/mysql-test/main/explain_non_select.result b/mysql-test/main/explain_non_select.result index 111b4c8..d60f10f 100644 --- a/mysql-test/main/explain_non_select.result +++ b/mysql-test/main/explain_non_select.result @@ -157,9 +157,13 @@ id select_type table partitions type possible_keys key key_len ref rows Extra explain extended update t2 set b=3 where a in (3,4); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where +Warnings: +Note 1003 update `test`.`t2` set `test`.`t2`.`b` = 3 where `test`.`t2`.`a` in (3,4) explain extended delete from t2 where a in (3,4); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where +Warnings: +Note 1003 delete from `test`.`t2` where `test`.`t2`.`a` in (3,4) drop table t1,t2; # # Check the special case where partition pruning removed all partitions diff --git a/mysql-test/main/multi_update.result b/mysql-test/main/multi_update.result index d6cf9ba..222c592 100644 --- a/mysql-test/main/multi_update.result +++ b/mysql-test/main/multi_update.result @@ -1253,7 +1253,7 @@ EXPLAIN DROP TABLES t1, t2; # End of 10.3 tests # -# MDEV-28538: multi-table UPDATE/DELETE with possible exists-to-in +# MDEV-30538: multi-table UPDATE/DELETE with possible exists-to-in # create table t1 (c1 int, c2 int, c3 int, index idx(c2)); insert into t1 values diff --git a/mysql-test/main/multi_update.test b/mysql-test/main/multi_update.test index 48e6250..329394e 100644 --- a/mysql-test/main/multi_update.test +++ b/mysql-test/main/multi_update.test @@ -1134,7 +1134,7 @@ DROP TABLES t1, t2; --echo # End of 10.3 tests --echo # ---echo # MDEV-28538: multi-table UPDATE/DELETE with possible exists-to-in +--echo # MDEV-30538: multi-table UPDATE/DELETE with possible exists-to-in --echo # create table t1 (c1 int, c2 int, c3 int, index idx(c2)); diff --git a/mysql-test/main/myisam_explain_non_select_all.result b/mysql-test/main/myisam_explain_non_select_all.result index 7f24cb4..3ca9629 100644 --- a/mysql-test/main/myisam_explain_non_select_all.result +++ b/mysql-test/main/myisam_explain_non_select_all.result @@ -17,6 +17,8 @@ FLUSH TABLES; EXPLAIN EXTENDED UPDATE t1 SET a = 10 WHERE a < 10; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where +Warnings: +Note 1003 update `test`.`t1` set `test`.`t1`.`a` = 10 where `test`.`t1`.`a` < 10 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 2 @@ -60,6 +62,8 @@ FLUSH TABLES; EXPLAIN EXTENDED DELETE FROM t1 WHERE a < 10; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where +Warnings: +Note 1003 delete from `test`.`t1` where `test`.`t1`.`a` < 10 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 2 @@ -103,6 +107,8 @@ FLUSH TABLES; EXPLAIN EXTENDED DELETE FROM t1 USING t1 WHERE a = 1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where +Warnings: +Note 1003 delete from `test`.`t1` using `test`.`t1` where `test`.`t1`.`a` = 1 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 2 @@ -150,6 +156,8 @@ EXPLAIN EXTENDED UPDATE t1, t2 SET t1.a = 10 WHERE t1.a = 1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 +Warnings: +Note 1003 update `test`.`t1` join `test`.`t2` set `test`.`t1`.`a` = 10 where `test`.`t1`.`a` = 1 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 4 @@ -200,6 +208,8 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t11 ALL NULL NULL NULL NULL 3 100.00 Using where 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 3 100.00 2 DERIVED t2 ALL NULL NULL NULL NULL 3 100.00 +Warnings: +Note 1003 /* select#1 */ update `test`.`t1` `t11` join (/* select#2 */ select `test`.`t2`.`b` AS `b` from `test`.`t2`) `t12` set `test`.`t11`.`a` = 10 where `test`.`t11`.`a` = 1 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 4 @@ -248,6 +258,8 @@ EXPLAIN EXTENDED UPDATE t1 SET a = 10 WHERE 1 IN (SELECT 1 FROM t2 WHERE id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 2 SUBQUERY t2 ALL NULL NULL NULL NULL 3 100.00 Using where +Warnings: +Note 1003 /* select#1 */ update `test`.`t1` set `test`.`t1`.`a` = 10 where <in_optimizer>(1,<exists>(/* select#2 */ select 1 from `test`.`t2` where `test`.`t2`.`b` < 3 and 1)) # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 4 @@ -300,6 +312,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 3 100.00 Using where Warnings: Note 1276 Field or reference 'test.t1.a' of SELECT #2 was resolved in SELECT #1 +Note 1003 /* select#1 */ update `test`.`t1` set `test`.`t1`.`a` = 10 where <in_optimizer>(`test`.`t1`.`a`,<exists>(/* select#2 */ select `test`.`t2`.`b` from `test`.`t2` where `test`.`t1`.`a` < 3 and <cache>(`test`.`t1`.`a`) = `test`.`t2`.`b`)) # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 4 @@ -353,6 +366,8 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00 1 PRIMARY t2 ALL NULL NULL NULL NULL 3 100.00 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 3 100.00 Using where +Warnings: +Note 1003 update `test`.`t1` semi join (`test`.`t2`) join `test`.`t2` set `test`.`t1`.`a` = 10 where `test`.`t2`.`b` < 3 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 4 @@ -405,6 +420,8 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t11 ALL NULL NULL NULL NULL 3 100.00 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 3 100.00 2 DERIVED t2 ALL NULL NULL NULL NULL 3 100.00 +Warnings: +Note 1003 /* select#1 */ update `test`.`t1` `t11` join (/* select#2 */ select `test`.`t2`.`b` AS `b` from `test`.`t2`) `t12` set `test`.`t11`.`a` = `test`.`t11`.`a` + 10 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 4 @@ -457,6 +474,8 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY <derived2> system NULL NULL NULL NULL 1 100.00 1 PRIMARY t11 ALL NULL NULL NULL NULL 3 100.00 2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used +Warnings: +Note 1003 /* select#1 */ update `test`.`t1` `t11` set `test`.`t11`.`a` = `test`.`t11`.`a` + 10 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 2 @@ -511,6 +530,8 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t11 ALL NULL NULL NULL NULL 3 100.00 Using where 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 3 100.00 2 DERIVED t2 ALL NULL NULL NULL NULL 3 100.00 +Warnings: +Note 1003 /* select#1 */ update `test`.`t1` `t11` join (/* select#2 */ select `test`.`t2`.`b` AS `b` from `test`.`t2`) `t12` set `test`.`t11`.`a` = 10 where `test`.`t11`.`a` > 1 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 4 @@ -555,6 +576,8 @@ FLUSH TABLES; EXPLAIN EXTENDED DELETE FROM t1 WHERE a > 1 LIMIT 1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where +Warnings: +Note 1003 delete from `test`.`t1` where `test`.`t1`.`a` > 1 limit 1 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 2 @@ -598,6 +621,8 @@ FLUSH TABLES; EXPLAIN EXTENDED DELETE FROM t1 WHERE 0; 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 +Warnings: +Note 1003 delete from `test`.`t1` where 0 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 2 @@ -638,6 +663,8 @@ FLUSH TABLES; EXPLAIN EXTENDED DELETE FROM t1 USING t1 WHERE 0; 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 +Warnings: +Note 1003 delete from `test`.`t1` using `test`.`t1` where 0 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 2 @@ -678,6 +705,8 @@ FLUSH TABLES; EXPLAIN EXTENDED DELETE FROM t1 WHERE a = 3; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 range a a 5 NULL 1 100.00 Using where +Warnings: +Note 1003 delete from `test`.`t1` where `test`.`t1`.`a` = 3 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 5 @@ -719,6 +748,8 @@ FLUSH TABLES; EXPLAIN EXTENDED DELETE FROM t1 WHERE a < 3; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 range a a 5 NULL 1 100.00 Using where +Warnings: +Note 1003 delete from `test`.`t1` where `test`.`t1`.`a` < 3 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 5 @@ -758,6 +789,8 @@ FLUSH TABLES; EXPLAIN EXTENDED DELETE FROM t1 WHERE t1.a > 0 ORDER BY t1.a; 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 +Warnings: +Note 1003 delete from `test`.`t1` where `test`.`t1`.`a` > 0 order by `test`.`t1`.`a` # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 3 @@ -797,6 +830,8 @@ FLUSH TABLES; EXPLAIN EXTENDED DELETE FROM t1 WHERE t1.a > 0 ORDER BY t1.a; 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 delete from `test`.`t1` where `test`.`t1`.`a` > 0 order by `test`.`t1`.`a` # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 3 @@ -840,6 +875,8 @@ FLUSH TABLES; EXPLAIN EXTENDED DELETE FROM t1 WHERE (@a:= a) ORDER BY a LIMIT 1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 index NULL PRIMARY 4 NULL 1 100.00 Using where +Warnings: +Note 1003 delete from `test`.`t1` where @a:=`test`.`t1`.`a` order by `test`.`t1`.`a` limit 1 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 3 @@ -884,6 +921,8 @@ FLUSH TABLES; EXPLAIN EXTENDED DELETE FROM t1 ORDER BY a ASC, b ASC LIMIT 1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 10 100.00 Using filesort +Warnings: +Note 1003 delete from `test`.`t1` order by `test`.`t1`.`a`,`test`.`t1`.`b` limit 1 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 7 @@ -941,6 +980,8 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 1 SIMPLE t2 ref PRIMARY PRIMARY 4 test.t1.a1 1 100.00 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 8 test.t2.b2,test.t1.b1 1 100.00 +Warnings: +Note 1003 delete from `test`.`t1`,`test`.`t2`,`test`.`t3` using `test`.`t1` join `test`.`t2` join `test`.`t3` where `test`.`t2`.`a2` = `test`.`t1`.`a1` and `test`.`t3`.`a3` = `test`.`t2`.`b2` and `test`.`t3`.`b3` = `test`.`t1`.`b1` # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 13 @@ -993,6 +1034,8 @@ EXPLAIN EXTENDED UPDATE t1 SET a = 10 WHERE a IN (SELECT a FROM t2); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where 2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 3 100.00 Using where +Warnings: +Note 1003 /* select#1 */ update `test`.`t1` set `test`.`t1`.`a` = 10 where <in_optimizer>(`test`.`t1`.`a`,<exists>(/* select#2 */ select `test`.`t2`.`a` from `test`.`t2` where <cache>(`test`.`t1`.`a`) = `test`.`t2`.`a`)) # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 4 @@ -1043,6 +1086,8 @@ EXPLAIN EXTENDED DELETE FROM t1 WHERE a1 IN (SELECT a2 FROM t2 WHERE a2 > 2); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 5 100.00 Using where 2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where +Warnings: +Note 1003 /* select#1 */ delete from `test`.`t1` where <in_optimizer>(`test`.`t1`.`a1`,<exists>(/* select#2 */ select `test`.`t2`.`a2` from `test`.`t2` where `test`.`t2`.`a2` > 2 and <cache>(`test`.`t1`.`a1`) = `test`.`t2`.`a2`)) # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 4 @@ -1088,6 +1133,8 @@ EXPLAIN EXTENDED DELETE FROM t1 WHERE a1 IN (SELECT a2 FROM t2 WHERE a2 > 2); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 5 100.00 Using where 2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where +Warnings: +Note 1003 /* select#1 */ delete from `test`.`t1` where <in_optimizer>(`test`.`t1`.`a1`,<exists>(/* select#2 */ select `test`.`t2`.`a2` from `test`.`t2` where `test`.`t2`.`a2` > 2 and <cache>(`test`.`t1`.`a1`) = `test`.`t2`.`a2`)) # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 4 @@ -1132,6 +1179,8 @@ FLUSH TABLES; EXPLAIN EXTENDED UPDATE t1 SET i = 10; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 5 100.00 +Warnings: +Note 1003 update `test`.`t1` set `test`.`t1`.`i` = 10 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 3 @@ -1175,6 +1224,8 @@ FLUSH TABLES; EXPLAIN EXTENDED DELETE FROM t1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL 5 NULL Deleting all rows +Warnings: +Note 1003 delete from `test`.`t1` # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 3 @@ -1221,6 +1272,8 @@ FLUSH TABLES; EXPLAIN EXTENDED DELETE FROM t2 WHERE b = 10 ORDER BY a, c LIMIT 5; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 index NULL a 15 NULL 5 100.00 Using where +Warnings: +Note 1003 delete from `test`.`t2` where `test`.`t2`.`b` = 10 order by `test`.`t2`.`a`,`test`.`t2`.`c` limit 5 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 8 @@ -1267,6 +1320,8 @@ FLUSH TABLES; EXPLAIN EXTENDED INSERT INTO t2 SELECT * FROM t1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 +Warnings: +Note 1003 insert into `test`.`t2` select `test`.`t1`.`i` AS `i` from `test`.`t1` # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 4 @@ -1311,6 +1366,8 @@ FLUSH TABLES; EXPLAIN EXTENDED REPLACE INTO t2 SELECT * FROM t1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 +Warnings: +Note 1003 replace into `test`.`t2` select `test`.`t1`.`i` AS `i` from `test`.`t1` # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 4 @@ -1351,6 +1408,8 @@ FLUSH TABLES; EXPLAIN EXTENDED INSERT INTO t1 SET i = 10; id select_type table type possible_keys key key_len ref rows filtered Extra 1 INSERT t1 ALL NULL NULL NULL NULL NULL 100.00 NULL +Warnings: +Note 1003 insert into `test`.`t1`(i) values (10) # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 2 @@ -1374,6 +1433,8 @@ FLUSH TABLES; EXPLAIN EXTENDED REPLACE INTO t1 SET i = 10; id select_type table type possible_keys key key_len ref rows filtered Extra 1 INSERT t1 ALL NULL NULL NULL NULL NULL 100.00 NULL +Warnings: +Note 1003 replace into `test`.`t1`(i) values (10) # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 2 @@ -1402,6 +1463,8 @@ FLUSH TABLES; EXPLAIN EXTENDED DELETE FROM t1 WHERE i > 10 AND i <= 18 ORDER BY i LIMIT 5; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 range PRIMARY PRIMARY 4 NULL 5 100.00 Using where +Warnings: +Note 1003 delete from `test`.`t1` where `test`.`t1`.`i` > 10 and `test`.`t1`.`i` <= 18 order by `test`.`t1`.`i` limit 5 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 4 @@ -1447,6 +1510,8 @@ FLUSH TABLES; EXPLAIN EXTENDED DELETE FROM t1 WHERE i > 10 AND i <= 18 ORDER BY i LIMIT 5; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 26 100.00 Using where; Using filesort +Warnings: +Note 1003 delete from `test`.`t1` where `test`.`t1`.`i` > 10 and `test`.`t1`.`i` <= 18 order by `test`.`t1`.`i` limit 5 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 4 @@ -1500,6 +1565,8 @@ FLUSH TABLES; EXPLAIN EXTENDED DELETE FROM t2 WHERE b = 10 ORDER BY a, c LIMIT 5; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 26 100.00 Using where; Using filesort +Warnings: +Note 1003 delete from `test`.`t2` where `test`.`t2`.`b` = 10 order by `test`.`t2`.`a`,`test`.`t2`.`c` limit 5 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 8 @@ -1554,6 +1621,8 @@ FLUSH TABLES; EXPLAIN EXTENDED DELETE FROM t2 WHERE b = 10 ORDER BY a, c LIMIT 5; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 index NULL a 15 NULL 5 100.00 Using where +Warnings: +Note 1003 delete from `test`.`t2` where `test`.`t2`.`b` = 10 order by `test`.`t2`.`a`,`test`.`t2`.`c` limit 5 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 8 @@ -1603,6 +1672,8 @@ FLUSH TABLES; EXPLAIN EXTENDED DELETE FROM t2 WHERE b = 10 ORDER BY a, c LIMIT 5; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 26 100.00 Using where; Using filesort +Warnings: +Note 1003 delete from `test`.`t2` where `test`.`t2`.`b` = 10 order by `test`.`t2`.`a`,`test`.`t2`.`c` limit 5 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 8 @@ -1657,6 +1728,8 @@ FLUSH TABLES; EXPLAIN EXTENDED DELETE FROM t2 WHERE b = 10 ORDER BY a, c LIMIT 5; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 26 100.00 Using where; Using filesort +Warnings: +Note 1003 delete from `test`.`t2` where `test`.`t2`.`b` = 10 order by `test`.`t2`.`a`,`test`.`t2`.`c` limit 5 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 8 @@ -1712,6 +1785,8 @@ FLUSH TABLES; EXPLAIN EXTENDED DELETE FROM t2 WHERE key1 < 13 or key2 < 14 ORDER BY key1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 index_merge key1,key2 key1,key2 5,5 NULL 7 100.00 Using sort_union(key1,key2); Using where; Using filesort +Warnings: +Note 1003 delete from `test`.`t2` where `test`.`t2`.`key1` < 13 or `test`.`t2`.`key2` < 14 order by `test`.`t2`.`key1` # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 6 @@ -1765,6 +1840,8 @@ FLUSH TABLES; EXPLAIN EXTENDED DELETE FROM t2 WHERE i > 10 AND i <= 18 ORDER BY i DESC LIMIT 5; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 range PRIMARY PRIMARY 4 NULL 5 100.00 Using where +Warnings: +Note 1003 delete from `test`.`t2` where `test`.`t2`.`i` > 10 and `test`.`t2`.`i` <= 18 order by `test`.`t2`.`i` desc limit 5 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 4 @@ -1812,6 +1889,8 @@ FLUSH TABLES; EXPLAIN EXTENDED DELETE FROM t2 ORDER BY a, b DESC LIMIT 5; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 26 100.00 Using filesort +Warnings: +Note 1003 delete from `test`.`t2` order by `test`.`t2`.`a`,`test`.`t2`.`b` desc limit 5 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 6 @@ -1866,6 +1945,8 @@ FLUSH TABLES; EXPLAIN EXTENDED DELETE FROM t2 ORDER BY a DESC, b DESC LIMIT 5; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 index NULL a 6 NULL 5 100.00 +Warnings: +Note 1003 delete from `test`.`t2` order by `test`.`t2`.`a` desc,`test`.`t2`.`b` desc limit 5 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 6 @@ -1915,6 +1996,8 @@ FLUSH TABLES; EXPLAIN EXTENDED UPDATE t2 SET a = 10 WHERE i > 10 AND i <= 18 ORDER BY i LIMIT 5; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 range PRIMARY PRIMARY 4 NULL 5 100.00 Using where; Using buffer +Warnings: +Note 1003 update `test`.`t2` set `test`.`t2`.`a` = 10 where `test`.`t2`.`i` > 10 and `test`.`t2`.`i` <= 18 order by `test`.`t2`.`i` limit 5 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 4 @@ -1963,6 +2046,8 @@ FLUSH TABLES; EXPLAIN EXTENDED UPDATE t2 SET a = 10 WHERE i > 10 AND i <= 18 ORDER BY i LIMIT 5; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 26 100.00 Using where; Using filesort +Warnings: +Note 1003 update `test`.`t2` set `test`.`t2`.`a` = 10 where `test`.`t2`.`i` > 10 and `test`.`t2`.`i` <= 18 order by `test`.`t2`.`i` limit 5 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 4 @@ -2017,6 +2102,8 @@ FLUSH TABLES; EXPLAIN EXTENDED UPDATE t2 SET d = 10 WHERE b = 10 ORDER BY a, c LIMIT 5; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 26 100.00 Using where; Using filesort +Warnings: +Note 1003 update `test`.`t2` set `test`.`t2`.`d` = 10 where `test`.`t2`.`b` = 10 order by `test`.`t2`.`a`,`test`.`t2`.`c` limit 5 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 8 @@ -2072,6 +2159,8 @@ FLUSH TABLES; EXPLAIN EXTENDED UPDATE t2 SET d = 10 WHERE b = 10 ORDER BY a, c LIMIT 5; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 index NULL a 15 NULL 5 100.00 Using where; Using buffer +Warnings: +Note 1003 update `test`.`t2` set `test`.`t2`.`d` = 10 where `test`.`t2`.`b` = 10 order by `test`.`t2`.`a`,`test`.`t2`.`c` limit 5 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 8 @@ -2122,6 +2211,8 @@ FLUSH TABLES; EXPLAIN EXTENDED UPDATE t2 SET d = 10 WHERE b = 10 ORDER BY a, c LIMIT 5; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 26 100.00 Using where; Using filesort +Warnings: +Note 1003 update `test`.`t2` set `test`.`t2`.`d` = 10 where `test`.`t2`.`b` = 10 order by `test`.`t2`.`a`,`test`.`t2`.`c` limit 5 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 8 @@ -2176,6 +2267,8 @@ FLUSH TABLES; EXPLAIN EXTENDED UPDATE t2 SET d = 10 WHERE b = 10 ORDER BY a, c LIMIT 5; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 26 100.00 Using where; Using filesort +Warnings: +Note 1003 update `test`.`t2` set `test`.`t2`.`d` = 10 where `test`.`t2`.`b` = 10 order by `test`.`t2`.`a`,`test`.`t2`.`c` limit 5 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 8 @@ -2231,6 +2324,8 @@ FLUSH TABLES; EXPLAIN EXTENDED UPDATE t2 SET i = 123 WHERE key1 < 13 or key2 < 14 ORDER BY key1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 index_merge key1,key2 key1,key2 5,5 NULL 7 100.00 Using sort_union(key1,key2); Using where; Using filesort +Warnings: +Note 1003 update `test`.`t2` set `test`.`t2`.`i` = 123 where `test`.`t2`.`key1` < 13 or `test`.`t2`.`key2` < 14 order by `test`.`t2`.`key1` # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 6 @@ -2284,6 +2379,8 @@ FLUSH TABLES; EXPLAIN EXTENDED UPDATE t2 SET a = 10 WHERE i > 10 AND i <= 18 ORDER BY i DESC LIMIT 5; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 range PRIMARY PRIMARY 4 NULL 5 100.00 Using where; Using buffer +Warnings: +Note 1003 update `test`.`t2` set `test`.`t2`.`a` = 10 where `test`.`t2`.`i` > 10 and `test`.`t2`.`i` <= 18 order by `test`.`t2`.`i` desc limit 5 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 4 @@ -2332,6 +2429,8 @@ FLUSH TABLES; EXPLAIN EXTENDED UPDATE t2 SET c = 10 ORDER BY a, b DESC LIMIT 5; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 26 100.00 Using filesort +Warnings: +Note 1003 update `test`.`t2` set `test`.`t2`.`c` = 10 order by `test`.`t2`.`a`,`test`.`t2`.`b` desc limit 5 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 6 @@ -2387,6 +2486,8 @@ FLUSH TABLES; EXPLAIN EXTENDED UPDATE t2 SET c = 10 ORDER BY a DESC, b DESC LIMIT 5; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 index NULL a 6 NULL 5 100.00 Using buffer +Warnings: +Note 1003 update `test`.`t2` set `test`.`t2`.`c` = 10 order by `test`.`t2`.`a` desc,`test`.`t2`.`b` desc limit 5 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 6 @@ -2439,6 +2540,8 @@ FLUSH TABLES; EXPLAIN EXTENDED UPDATE t1 SET c2 = 0 WHERE c1_idx = 'y' ORDER BY pk DESC LIMIT 2; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 range c1_idx c1_idx 2 NULL 2 100.00 Using where; Using filesort +Warnings: +Note 1003 update `test`.`t1` set `test`.`t1`.`c2` = 0 where `test`.`t1`.`c1_idx` = 'y' order by `test`.`t1`.`pk` desc limit 2 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 6 @@ -2485,6 +2588,8 @@ FLUSH TABLES; EXPLAIN EXTENDED DELETE FROM t1 WHERE c1_idx = 'y' ORDER BY pk DESC LIMIT 2; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 range c1_idx c1_idx 2 NULL 2 100.00 Using where; Using filesort +Warnings: +Note 1003 delete from `test`.`t1` where `test`.`t1`.`c1_idx` = 'y' order by `test`.`t1`.`pk` desc limit 2 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 6 @@ -2534,6 +2639,8 @@ FLUSH TABLES; EXPLAIN EXTENDED UPDATE t1 SET a=a+10 WHERE a > 34; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 range PRIMARY PRIMARY 4 NULL 2 100.00 Using where; Using buffer +Warnings: +Note 1003 update `test`.`t1` set `test`.`t1`.`a` = `test`.`t1`.`a` + 10 where `test`.`t1`.`a` > 34 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 3 @@ -2581,6 +2688,8 @@ EXPLAIN EXTENDED UPDATE t1 LEFT JOIN t2 ON t1.c1 = t2.c1 SET t2.c2 = 10; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 system NULL NULL NULL NULL 0 0.00 Const row not found 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 +Warnings: +Note 1003 update `test`.`t1` set NULL = 10 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 7 @@ -2624,6 +2733,8 @@ EXPLAIN EXTENDED UPDATE t1 LEFT JOIN t2 ON t1.c1 = t2.c1 SET t2.c2 = 10 W id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 system NULL NULL NULL NULL 0 0.00 Const row not found 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 Using where +Warnings: +Note 1003 update `test`.`t1` set NULL = 10 where `test`.`t1`.`c3` = 10 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 7 @@ -2676,6 +2787,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 2 DEPENDENT SUBQUERY t2 ALL IDX NULL NULL NULL 2 100.00 Using where Warnings: Note 1276 Field or reference 'test.t1.f1' of SELECT #2 was resolved in SELECT #1 +Note 1003 /* select#1 */ update `test`.`t1` set `test`.`t1`.`f2` = (/* select#2 */ select max(`test`.`t2`.`f4`) from `test`.`t2` where `test`.`t2`.`f3` = `test`.`t1`.`f1`) # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 7 @@ -2747,6 +2859,8 @@ EXPLAIN EXTENDED UPDATE v1 SET a = 1 WHERE a > 0; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t11 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t12 ALL NULL NULL NULL NULL 2 100.00 +Warnings: +Note 1003 update `test`.`t1` `t11` join `test`.`t1` `t12` set `test`.`t11`.`a` = 1 where `test`.`t11`.`a` > 0 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 2 @@ -2792,6 +2906,8 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 1 SIMPLE t11 ALL NULL NULL NULL NULL 2 100.00 Using where 1 SIMPLE t12 ALL NULL NULL NULL NULL 2 100.00 +Warnings: +Note 1003 update `test`.`t1` join `test`.`t1` `t11` join `test`.`t1` `t12` set `test`.`t11`.`a` = 1 where `test`.`t11`.`a` = `test`.`t1`.`a` # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 2 @@ -2841,6 +2957,8 @@ FLUSH TABLES; EXPLAIN EXTENDED DELETE FROM v1 WHERE a < 4; 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#1 */ delete from `test`.`t1` where `test`.`t1`.`a` < 4 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 3 @@ -2892,6 +3010,8 @@ EXPLAIN EXTENDED DELETE v1 FROM t2, v1 WHERE t2.x = v1.a; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 4 100.00 Using where 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.x 1 100.00 +Warnings: +Note 1003 delete from `test`.`t1` using `test`.`t2` join `test`.`t1` where `test`.`t1`.`a` = `test`.`t2`.`x` # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 6 @@ -2943,6 +3063,8 @@ EXPLAIN EXTENDED DELETE v1 FROM t2, v1 WHERE t2.x = v1.a; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 4 100.00 Using where 1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.x 1 100.00 +Warnings: +Note 1003 delete from `test`.`t1` using `test`.`t2` join `test`.`t1` where `test`.`t1`.`a` = `test`.`t2`.`x` # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 6 @@ -2987,6 +3109,8 @@ FLUSH TABLES; EXPLAIN EXTENDED INSERT INTO v1 VALUES (10); id select_type table type possible_keys key key_len ref rows filtered Extra 1 INSERT t1 ALL NULL NULL NULL NULL NULL 100.00 NULL +Warnings: +Note 1003 insert into `test`.`t1`(x) values (10) # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 2 @@ -3027,6 +3151,8 @@ FLUSH TABLES; EXPLAIN EXTENDED INSERT INTO v1 SELECT * FROM t1; 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 insert into `test`.`t2`(x) /* select#1 */ select NULL AS `a` from `test`.`t1` # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 4 @@ -3084,6 +3210,8 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where 2 DEPENDENT SUBQUERY <derived3> index_subquery key0 key0 5 func 2 100.00 3 DERIVED t2 ALL NULL NULL NULL NULL 3 100.00 Using filesort +Warnings: +Note 1003 /* select#1 */ update `test`.`t1` set `test`.`t1`.`a` = 10 where <in_optimizer>(`test`.`t1`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`a`) in (temporary) on key0))) # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 4 @@ -3140,6 +3268,8 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 3 100.00 2 MATERIALIZED <derived3> ALL NULL NULL NULL NULL 3 100.00 3 DERIVED t2 ALL NULL NULL NULL NULL 3 100.00 Using filesort +Warnings: +Note 1003 /* select#1 */ update `test`.`t1` semi join ((/* select#3 */ select `test`.`t2`.`b` AS `b` from `test`.`t2` order by `test`.`t2`.`b` limit 2,2) `x`) join `test`.`t2` set `test`.`t1`.`a` = 10 where 1 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 4 @@ -3198,6 +3328,8 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 3 MATERIALIZED <derived4> ALL NULL NULL NULL NULL 3 100.00 4 DERIVED t2 ALL NULL NULL NULL NULL 3 100.00 Using filesort 2 DERIVED t2 ALL NULL NULL NULL NULL 3 100.00 +Warnings: +Note 1003 /* select#1 */ update `test`.`t1` semi join ((/* select#4 */ select `test`.`t2`.`b` AS `b` from `test`.`t2` order by `test`.`t2`.`b` limit 2,2) `x`) join (/* select#2 */ select `test`.`t2`.`b` AS `b` from `test`.`t2`) `y` set `test`.`t1`.`a` = 10 where 1 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 4 @@ -3248,6 +3380,8 @@ JOIN t1 AS a12 ON a12.c1 = a11.c1 id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 0 100.00 2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +Warnings: +Note 1003 /* select#1 */ update `test`.`t3` set `test`.`t3`.`c3` = (/* select#2 */ select count(NULL) from `test`.`t1` `a11` straight_join `test`.`t2` `a21` join `test`.`t1` `a12` where 0) DROP TABLE t1, t2, t3; #73 CREATE TABLE t1 (id INT); @@ -3276,6 +3410,8 @@ FLUSH TABLES; EXPLAIN EXTENDED UPDATE t1 SET a=a+1 WHERE a>10; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 range PRIMARY PRIMARY 4 NULL 1 100.00 Using where; Using buffer +Warnings: +Note 1003 update `test`.`t1` set `test`.`t1`.`a` = `test`.`t1`.`a` + 1 where `test`.`t1`.`a` > 10 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 3 @@ -3315,6 +3451,8 @@ FLUSH TABLES; EXPLAIN EXTENDED UPDATE t1 SET a=a+1 WHERE a>10 ORDER BY a+20; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 range PRIMARY PRIMARY 4 NULL 1 100.00 Using where; Using filesort +Warnings: +Note 1003 update `test`.`t1` set `test`.`t1`.`a` = `test`.`t1`.`a` + 1 where `test`.`t1`.`a` > 10 order by `test`.`t1`.`a` + 20 # Status of EXPLAIN EXTENDED query Variable_name Value Handler_read_key 3 @@ -3341,6 +3479,61 @@ Handler_read_key 4 Sort_range 1 DROP TABLE t1; +#75 +CREATE TABLE t1 (id INT PRIMARY KEY, i INT); +# +# query: INSERT INTO t1 VALUES (3,10), (7,11), (3,11) ON DUPLICATE KEY UPDATE id=LAST_INSERT_ID(id); +# select: +# +EXPLAIN INSERT INTO t1 VALUES (3,10), (7,11), (3,11) ON DUPLICATE KEY UPDATE id=LAST_INSERT_ID(id);; +id select_type table type possible_keys key key_len ref rows Extra +1 INSERT t1 ALL NULL NULL NULL NULL NULL NULL +FLUSH STATUS; +FLUSH TABLES; +EXPLAIN EXTENDED INSERT INTO t1 VALUES (3,10), (7,11), (3,11) ON DUPLICATE KEY UPDATE id=LAST_INSERT_ID(id);; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 INSERT t1 ALL NULL NULL NULL NULL NULL 100.00 NULL +Warnings: +Note 1003 insert into `test`.`t1` values (3,10),(7,11),(3,11) on duplicate key update `test`.`t1`.`id` = last_insert_id(`test`.`t1`.`id`) +# Status of EXPLAIN EXTENDED query +Variable_name Value +Handler_read_key 4 +# Status of testing query execution: +Variable_name Value +Handler_read_key 4 +Handler_read_rnd 1 +Handler_write 3 + +DROP TABLE t1; +#76 +CREATE TABLE t1 (id INT PRIMARY KEY, i INT); +CREATE TABLE t2 (a INT, b INT); +INSERT INTO t2 VALUES (1,10), (3,10), (7,11), (3,11); +# +# query: INSERT INTO t1 SELECT * FROM t2 ON DUPLICATE KEY UPDATE id=LAST_INSERT_ID(id); +# select: +# +EXPLAIN INSERT INTO t1 SELECT * FROM t2 ON DUPLICATE KEY UPDATE id=LAST_INSERT_ID(id);; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL 4 +FLUSH STATUS; +FLUSH TABLES; +EXPLAIN EXTENDED INSERT INTO t1 SELECT * FROM t2 ON DUPLICATE KEY UPDATE id=LAST_INSERT_ID(id);; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL 4 100.00 +Warnings: +Note 1003 insert into `test`.`t1` select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` on duplicate key update `test`.`t1`.`id` = last_insert_id(`test`.`t1`.`id`) +# Status of EXPLAIN EXTENDED query +Variable_name Value +Handler_read_key 7 +# Status of testing query execution: +Variable_name Value +Handler_read_key 7 +Handler_read_rnd 1 +Handler_read_rnd_next 5 +Handler_write 4 + +DROP TABLE t1,t2; # # Bug #12949629: CLIENT LOSES CONNECTION AFTER EXECUTING A PROCEDURE WITH # EXPLAIN UPDATE/DEL/INS diff --git a/mysql-test/main/opt_trace.result b/mysql-test/main/opt_trace.result index a343d59..a8b391f 100644 --- a/mysql-test/main/opt_trace.result +++ b/mysql-test/main/opt_trace.result @@ -3766,7 +3766,7 @@ explain delete t0,t1 from t0, t1 where t0.a=t1.a and t1.a<3 { "select_id": 1, "steps": [ { - "expanded_query": "select NULL AS `NULL` from t0 join t1 where t0.a = t1.a and t1.a < 3" + "expanded_query": "delete from t0,t1 using t0 join t1 where t0.a = t1.a and t1.a < 3" } ] } diff --git a/mysql-test/main/ps.result b/mysql-test/main/ps.result index 673b18c..408b1ec 100644 --- a/mysql-test/main/ps.result +++ b/mysql-test/main/ps.result @@ -5566,11 +5566,15 @@ EXPLAIN EXTENDED UPDATE t3 SET c3 = ( SELECT COUNT(d1.c1) FROM ( SELECT a11.c1 F id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 0 100.00 2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +Warnings: +Note 1003 /* select#1 */ update `test`.`t3` set `test`.`t3`.`c3` = (/* select#2 */ select count(NULL) from `test`.`t1` `a11` straight_join `test`.`t2` `a21` join `test`.`t1` `a12` where 0) PREPARE stmt FROM "EXPLAIN EXTENDED UPDATE t3 SET c3 = ( SELECT COUNT(d1.c1) FROM ( SELECT a11.c1 FROM t1 AS a11 STRAIGHT_JOIN t2 AS a21 ON a21.c2 = a11.c1 JOIN t1 AS a12 ON a12.c1 = a11.c1 ) d1 )"; EXECUTE stmt; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t3 ALL NULL NULL NULL NULL 0 100.00 2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +Warnings: +Note 1003 /* select#1 */ update `test`.`t3` set `test`.`t3`.`c3` = (/* select#2 */ select count(NULL) from `test`.`t1` `a11` straight_join `test`.`t2` `a21` join `test`.`t1` `a12` where 0) DEALLOCATE PREPARE stmt; DROP TABLE t1, t2, t3; # diff --git a/sql/sql_delete.cc b/sql/sql_delete.cc index 1b3fa30..776dfff 100644 --- a/sql/sql_delete.cc +++ b/sql/sql_delete.cc @@ -1084,6 +1084,8 @@ int mysql_prepare_delete(THD *thd, TABLE_LIST *table_list, DBUG_RETURN(TRUE); select_lex->fix_prepare_information(thd, conds, &fake_conds); + if (!thd->lex->upd_del_where) + thd->lex->upd_del_where= *conds; DBUG_RETURN(FALSE); } diff --git a/sql/sql_explain.cc b/sql/sql_explain.cc index 70e3009..6b76db8 100644 --- a/sql/sql_explain.cc +++ b/sql/sql_explain.cc @@ -161,7 +161,7 @@ void Explain_query::query_plan_ready() Send EXPLAIN output to the client. */ -int Explain_query::send_explain(THD *thd) +int Explain_query::send_explain(THD *thd, bool extended) { select_result *result; LEX *lex= thd->lex; @@ -174,8 +174,22 @@ int Explain_query::send_explain(THD *thd) if (thd->lex->explain_json) print_explain_json(result, thd->lex->analyze_stmt); else + { res= print_explain(result, lex->describe, thd->lex->analyze_stmt); - + if (extended) + { + char buff[1024]; + String str(buff,(uint32) sizeof(buff), system_charset_info); + str.length(0); + /* + The warnings system requires input in utf8, @see + mysqld_show_warnings(). + */ + lex->unit.print(&str, QT_EXPLAIN_EXTENDED); + push_warning(thd, Sql_condition::WARN_LEVEL_NOTE, + ER_YES, str.c_ptr_safe()); + } + } if (res) result->abort_result_set(); else @@ -185,6 +199,7 @@ int Explain_query::send_explain(THD *thd) } + /* The main entry point to print EXPLAIN of the entire query */ diff --git a/sql/sql_explain.h b/sql/sql_explain.h index 7b5042b..3add404 100644 --- a/sql/sql_explain.h +++ b/sql/sql_explain.h @@ -474,7 +474,7 @@ class Explain_query : public Sql_alloc bool is_analyze); /* Send tabular EXPLAIN to the client */ - int send_explain(THD *thd); + int send_explain(THD *thd, bool extended); /* Return tabular EXPLAIN output as a text string */ bool print_explain_str(THD *thd, String *out_str, bool is_analyze); diff --git a/sql/sql_insert.cc b/sql/sql_insert.cc index f31c9ea..9a76061 100644 --- a/sql/sql_insert.cc +++ b/sql/sql_insert.cc @@ -827,7 +827,8 @@ bool mysql_insert(THD *thd,TABLE_LIST *table_list, save_insert_query_plan(thd, table_list); if (thd->lex->describe) { - retval= thd->lex->explain->send_explain(thd); + bool extended= thd->lex->describe & DESCRIBE_EXTENDED; + retval= thd->lex->explain->send_explain(thd, extended); goto abort; } @@ -1250,7 +1251,8 @@ bool mysql_insert(THD *thd,TABLE_LIST *table_list, goto abort; if (thd->lex->analyze_stmt) { - retval= thd->lex->explain->send_explain(thd); + bool extended= thd->lex->describe & DESCRIBE_EXTENDED; + retval= thd->lex->explain->send_explain(thd, extended); goto abort; } DBUG_PRINT("info", ("touched: %llu copied: %llu updated: %llu deleted: %llu", diff --git a/sql/sql_lex.cc b/sql/sql_lex.cc index e14d9f7..e7689a9 100644 --- a/sql/sql_lex.cc +++ b/sql/sql_lex.cc @@ -780,6 +780,8 @@ void LEX::start(THD *thd_arg) frame_bottom_bound= NULL; win_spec= NULL; + upd_del_where= NULL; + vers_conditions.empty(); period_conditions.empty(); diff --git a/sql/sql_lex.h b/sql/sql_lex.h index 769b1750..6170637 100644 --- a/sql/sql_lex.h +++ b/sql/sql_lex.h @@ -1417,6 +1417,10 @@ class st_select_lex: public st_select_lex_node } bool setup_ref_array(THD *thd, uint order_group_num); void print(THD *thd, String *str, enum_query_type query_type); + void print_item_list(THD *thd, String *str, enum_query_type query_type); + void print_set_clause(THD *thd, String *str, enum_query_type query_type); + void print_on_duplicate_key_clause(THD *thd, String *str, + enum_query_type query_type); static void print_order(String *str, ORDER *order, enum_query_type query_type); @@ -3493,6 +3497,8 @@ struct LEX: public Query_tables_list Window_frame_bound *frame_bottom_bound; Window_spec *win_spec; + Item *upd_del_where; + /* System Versioning */ vers_select_conds_t vers_conditions; vers_select_conds_t period_conditions; diff --git a/sql/sql_parse.cc b/sql/sql_parse.cc index 1f1962a..c495ae2 100644 --- a/sql/sql_parse.cc +++ b/sql/sql_parse.cc @@ -4744,7 +4744,10 @@ mysql_execute_command(THD *thd) } if (!res && (explain || lex->analyze_stmt)) - res= thd->lex->explain->send_explain(thd); + { + bool extended= thd->lex->describe & DESCRIBE_EXTENDED; + res= thd->lex->explain->send_explain(thd, extended); + } /* revert changes for SP */ MYSQL_INSERT_SELECT_DONE(res, (ulong) thd->get_row_count_func()); @@ -4813,7 +4816,10 @@ mysql_execute_command(THD *thd) if (thd->lex->analyze_stmt || thd->lex->describe) { if (!res) - res= thd->lex->explain->send_explain(thd); + { + bool extended= thd->lex->describe & DESCRIBE_EXTENDED; + res= thd->lex->explain->send_explain(thd, extended); + } } delete sel_result; @@ -4875,7 +4881,10 @@ mysql_execute_command(THD *thd) else { if (lex->describe || lex->analyze_stmt) - res= thd->lex->explain->send_explain(thd); + { + bool extended= thd->lex->describe & DESCRIBE_EXTENDED; + res= thd->lex->explain->send_explain(thd, extended); + } } multi_delete_error: delete result; @@ -6463,7 +6472,10 @@ static bool execute_sqlcom_select(THD *thd, TABLE_LIST *all_tables) thd->protocol= save_protocol; } if (!res) - res= thd->lex->explain->send_explain(thd); + { + bool extended= thd->lex->describe & DESCRIBE_EXTENDED; + res= thd->lex->explain->send_explain(thd, extended); + } } } } diff --git a/sql/sql_select.cc b/sql/sql_select.cc index 2c12d1c..c4fc2d1 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -305,6 +305,9 @@ static Item **get_sargable_cond(JOIN *join, TABLE *table); bool is_eq_cond_injected_for_split_opt(Item_func_eq *eq_item); +void print_list_item(String *str, List_item *list, + enum_query_type query_type); + #ifndef DBUG_OFF /* @@ -27981,6 +27984,162 @@ void TABLE_LIST::print(THD *thd, table_map eliminated_tables, String *str, } } +enum explainable_cmd_type +{ + SELECT_CMD, INSERT_CMD, REPLACE_CMD, UPDATE_CMD, DELETE_CMD, NO_CMD +}; + +static +const char * const explainable_cmd_name []= +{ + "select ", + "insert ", + "replace ", + "update ", + "delete ", +}; + +static +char const *get_explainable_cmd_name(enum explainable_cmd_type cmd) +{ + return explainable_cmd_name[cmd]; +} + +static +enum explainable_cmd_type get_explainable_cmd_type(THD *thd) +{ + switch (thd->lex->sql_command) { + case SQLCOM_SELECT: + return SELECT_CMD; + case SQLCOM_INSERT: + case SQLCOM_INSERT_SELECT: + return INSERT_CMD; + case SQLCOM_REPLACE: + case SQLCOM_REPLACE_SELECT: + return REPLACE_CMD; + case SQLCOM_UPDATE: + case SQLCOM_UPDATE_MULTI: + return UPDATE_CMD; + case SQLCOM_DELETE: + case SQLCOM_DELETE_MULTI: + return DELETE_CMD; + default: + return SELECT_CMD; + } +} + + +void TABLE_LIST::print_leaf_tables(THD *thd, String *str, + enum_query_type query_type) +{ + if (merge_underlying_list) + { + for (TABLE_LIST *tbl= merge_underlying_list; tbl; tbl= tbl->next_local) + tbl->print_leaf_tables(thd, str, query_type); + } + else + print(thd, 0, str, query_type); +} + + +void st_select_lex::print_item_list(THD *thd, String *str, + enum_query_type query_type) +{ + bool first= 1; + /* + outer_select() can not be used here because it is for name resolution + and will return NULL at any end of name resolution chain (view/derived) + */ + bool top_level= (get_master()->get_master() == 0); + List_iterator_fast<Item> it(item_list); + Item *item; + while ((item= it++)) + { + if (first) + first= 0; + else + str->append(','); + + if ((is_subquery_function() && item->is_autogenerated_name) || + !item->name.str) + { + /* + Do not print auto-generated aliases in subqueries. It has no purpose + in a view definition or other contexts where the query is printed. + */ + item->print(str, query_type); + } + else + { + /* + Do not print illegal names (if it is not top level SELECT). + Top level view checked (and correct name are assigned), + other cases of top level SELECT are not important, because + it is not "table field". + */ + if (top_level || + !item->is_autogenerated_name || + !check_column_name(item->name.str)) + item->print_item_w_name(str, query_type); + else + item->print(str, query_type); + } + } +} + + +void st_select_lex::print_set_clause(THD *thd, String *str, + enum_query_type query_type) +{ + bool first= 1; + /* + outer_select() can not be used here because it is for name resolution + and will return NULL at any end of name resolution chain (view/derived) + */ + List_iterator_fast<Item> it(item_list); + List_iterator_fast<Item> vt(thd->lex->value_list); + Item *item; + Item *val; + while ((item= it++, val= vt++ )) + { + if (first) + { + str->append(STRING_WITH_LEN(" set ")); + first= 0; + } + else + str->append(','); + + item->print(str, query_type); + str->append(STRING_WITH_LEN(" = ")); + val->print(str, query_type); + } +} + + +void st_select_lex::print_on_duplicate_key_clause(THD *thd, String *str, + enum_query_type query_type) +{ + bool first= 1; + List_iterator_fast<Item> it(thd->lex->update_list); + List_iterator_fast<Item> vt(thd->lex->value_list); + Item *item; + Item *val; + while ((item= it++, val= vt++ )) + { + if (first) + { + str->append(STRING_WITH_LEN(" on duplicate key update ")); + first= 0; + } + else + str->append(','); + + item->print(str, query_type); + str->append(STRING_WITH_LEN(" = ")); + val->print(str, query_type); + } +} void st_select_lex::print(THD *thd, String *str, enum_query_type query_type) { @@ -27998,6 +28157,61 @@ void st_select_lex::print(THD *thd, String *str, enum_query_type query_type) return; } + bool top_level= (get_master()->get_master() == 0); + enum explainable_cmd_type sel_type= SELECT_CMD; + if (top_level) + sel_type= get_explainable_cmd_type(thd); + + if (sel_type == INSERT_CMD || sel_type == REPLACE_CMD) + { + str->append(get_explainable_cmd_name(sel_type)); + str->append(STRING_WITH_LEN("into ")); + TABLE_LIST *tbl= thd->lex->query_tables; + while (tbl->merge_underlying_list) + tbl= tbl->merge_underlying_list; + tbl->print(thd, 0, str, query_type); + if (thd->lex->field_list.elements) + { + str->append ('('); + List_iterator_fast<Item> it(thd->lex->field_list); + Item *item; + bool first= true; + while ((item= it++)) + { + if (first) + first= false; + else + str->append(','); + str->append(item->name); + } + str->append(')'); + } + + str->append(' '); + + if (thd->lex->sql_command == SQLCOM_INSERT || + thd->lex->sql_command == SQLCOM_REPLACE) + { + str->append(STRING_WITH_LEN("values ")); + bool is_first_elem= true; + List_iterator_fast<List_item> li(thd->lex->many_values); + List_item *list; + + while ((list= li++)) + { + if (is_first_elem) + is_first_elem= false; + else + str->append(','); + + print_list_item(str, list, query_type); + } + if (thd->lex->update_list.elements) + print_on_duplicate_key_clause(thd, str, query_type); + return; + } + } + if ((query_type & QT_SHOW_SELECT_NUMBER) && thd->lex->all_selects_list && thd->lex->all_selects_list->link_next && @@ -28021,7 +28235,10 @@ void st_select_lex::print(THD *thd, String *str, enum_query_type query_type) str->append(" */ "); } - str->append(STRING_WITH_LEN("select ")); + if (sel_type == SELECT_CMD || + sel_type == INSERT_CMD || + sel_type == REPLACE_CMD) + str->append(STRING_WITH_LEN("select ")); if (join && join->cleaned) { @@ -28067,57 +28284,66 @@ void st_select_lex::print(THD *thd, String *str, enum_query_type query_type) } //Item List - bool first= 1; + if (sel_type == SELECT_CMD || + sel_type == INSERT_CMD || + sel_type == REPLACE_CMD) + print_item_list(thd, str, query_type); /* - outer_select() can not be used here because it is for name resolution - and will return NULL at any end of name resolution chain (view/derived) + from clause + TODO: support USING/FORCE/IGNORE index */ - bool top_level= (get_master()->get_master() == 0); - List_iterator_fast<Item> it(item_list); - Item *item; - while ((item= it++)) + if (table_list.elements) { - if (first) - first= 0; - else - str->append(','); - - if ((is_subquery_function() && item->is_autogenerated_name) || - !item->name.str) + if (sel_type == SELECT_CMD || + sel_type == INSERT_CMD || + sel_type == REPLACE_CMD) { - /* - Do not print auto-generated aliases in subqueries. It has no purpose - in a view definition or other contexts where the query is printed. - */ - item->print(str, query_type); + str->append(STRING_WITH_LEN(" from ")); + /* go through join tree */ + print_join(thd, join? join->eliminated_tables: 0, str, &top_join_list, + query_type); } - else + if (sel_type == UPDATE_CMD || sel_type == DELETE_CMD) + str->append(STRING_WITH_LEN(get_explainable_cmd_name(sel_type))); + if (sel_type == DELETE_CMD) { - /* - Do not print illegal names (if it is not top level SELECT). - Top level view checked (and correct name are assigned), - other cases of top level SELECT are not important, because - it is not "table field". - */ - if (top_level || - !item->is_autogenerated_name || - !check_column_name(item->name.str)) - item->print_item_w_name(str, query_type); + str->append(STRING_WITH_LEN(" from ")); + bool first= true; + for (TABLE_LIST *target_tbl= thd->lex->auxiliary_table_list.first; + target_tbl; + target_tbl= target_tbl->next_local) + { + if (first) + first= false; + else + str->append(','); + target_tbl->correspondent_table->print_leaf_tables(thd, str, + query_type); + } + + if (!first) + str->append(STRING_WITH_LEN(" using ")); + } + if (sel_type == UPDATE_CMD || sel_type == DELETE_CMD) + { + if (join) + print_join(thd, 0, str, &top_join_list, query_type); else - item->print(str, query_type); + { + bool first= true; + List_iterator_fast<TABLE_LIST> li(leaf_tables); + TABLE_LIST *tbl; + while ((tbl= li++)) + { + if (first) + first= false; + else + str->append(','); + tbl->print(thd, 0, str, query_type); + } + } } } - - /* - from clause - TODO: support USING/FORCE/IGNORE index - */ - if (table_list.elements) - { - str->append(STRING_WITH_LEN(" from ")); - /* go through join tree */ - print_join(thd, join? join->eliminated_tables: 0, str, &top_join_list, query_type); - } else if (where) { /* @@ -28127,10 +28353,15 @@ void st_select_lex::print(THD *thd, String *str, enum_query_type query_type) str->append(STRING_WITH_LEN(" from DUAL ")); } + if (sel_type == UPDATE_CMD) + print_set_clause(thd, str, query_type); + // Where Item *cur_where= where; if (join) cur_where= join->conds; + else if (sel_type == UPDATE_CMD || sel_type == DELETE_CMD) + cur_where= thd->lex->upd_del_where; if (cur_where || cond_value != Item::COND_UNDEF) { str->append(STRING_WITH_LEN(" where ")); @@ -28187,6 +28418,15 @@ void st_select_lex::print(THD *thd, String *str, enum_query_type query_type) else if (lock_type == TL_WRITE) str->append(" for update"); + if ((sel_type == INSERT_CMD || sel_type == REPLACE_CMD) && + thd->lex->update_list.elements) + print_on_duplicate_key_clause(thd, str, query_type); + + // returning clause + if (sel_type == DELETE_CMD && !item_list.elements) + { + print_item_list(thd, str, query_type); + } // PROCEDURE unsupported here } diff --git a/sql/sql_update.cc b/sql/sql_update.cc index a298071..834fa61 100644 --- a/sql/sql_update.cc +++ b/sql/sql_update.cc @@ -1371,7 +1371,8 @@ int mysql_update(THD *thd, goto err; emit_explain_and_leave: - int err2= thd->lex->explain->send_explain(thd); + bool extended= thd->lex->describe & DESCRIBE_EXTENDED; + int err2= thd->lex->explain->send_explain(thd, extended); delete select; free_underlaid_joins(thd, select_lex); @@ -1445,6 +1446,8 @@ bool mysql_prepare_update(THD *thd, TABLE_LIST *table_list, select_lex->fix_prepare_information(thd, conds, &fake_conds); + if (!thd->lex->upd_del_where) + thd->lex->upd_del_where= *conds; DBUG_RETURN(FALSE); } @@ -1974,7 +1977,10 @@ bool mysql_multi_update(THD *thd, TABLE_LIST *table_list, List<Item> *fields, else { if (thd->lex->describe || thd->lex->analyze_stmt) - res= thd->lex->explain->send_explain(thd); + { + bool extended= thd->lex->describe & DESCRIBE_EXTENDED; + res= thd->lex->explain->send_explain(thd, extended); + } } thd->abort_on_warning= 0; DBUG_RETURN(res); diff --git a/sql/table.h b/sql/table.h index c4b0d78..6f7f4e6 100644 --- a/sql/table.h +++ b/sql/table.h @@ -2708,6 +2708,8 @@ struct TABLE_LIST } void print(THD *thd, table_map eliminated_tables, String *str, enum_query_type query_type); + void print_leaf_tables(THD *thd, String *str, + enum_query_type query_type); bool check_single_table(TABLE_LIST **table, table_map map, TABLE_LIST *view); bool set_insert_values(MEM_ROOT *mem_root);
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IgorBabaev