Re: [Maria-developers] [ME-585] Integrate existing Community Patch “Flashback” into MariaDB Server.

Lixun Peng <lixun.peng@mariadb.com> writes:

Hi Kristian,

I ported Flashback to MariaDB 10.1, could you please review this patch?

Thanks for the patch. Some comments and questions below, inline in the patch.

[2. text/plain; ME-585.diff]

commit 11421434433fb6a5160dae721f0ecb0549e4a5fe Author: plinux <lixun.penglx@alibaba-inc.com> Date: Wed May 25 19:46:43 2016 +0800

[ME-585] Integrate existing Community Patch “Flashback” into MariaDB Server.

==== Description ====

Flashback can roll-back the instances/databases/tables to a snapshot. It's implement on Server-Level by full image format binary logs, so it supports all engines. Currently, it’s a feature inside mysqlbinlog tool (with --flashback arguments).

==== New Arguments ====

--flashback (-B) It will let mysqlbinlog to work on FLASHBACK mode.

--table (-T) It's similar with -d, but this argument is for specific tables.

--review It will let mysqlbinlog print the SQL for reviewing. Reviewing feature will create a new "review" table to record the data that will be modified by FLASHBACK feature If you don't set the --review-dbname/tablename, "review" table will created on current DB, and the table name will be "__original_table_name". And for getting the original table struct, mysqlbinlog need to connect mysql, so --user/--host/--password is necessary.

--review-dbname The DB name that you want to store the review table.

--review-tablename The TABLE name that you want to store the original data before modified. Only if you set -T, this argument is useful.

Nice documentation! Some suggestions for improvement: Maybe you could mention explicitly to what point the database is rolled back. I assume it is to the point at which mysqlbinlog would normally start dumping? I think it would be useful for users to have an explicit list of how the starting point may be specified (the most important probably being --start-datetime that you use in the examples). Also, what happens if one needs to flashback across multiple binlog files? What happens in the case of DDL (or other query_log_event)? I assume these cannot be flashback'ed. Will the tool stop with an error before doing anything? Will it stop with an error half-way, leaving a partial flashback? Or will it leave a corrupted state (row events flashed back, query event modifications kept)? It is not 100% clear to me what the --review feature does. Given table t1, does it create a table `__original_t1`, which contains the subset of rows of t1 that would be modified by flashback - basically the after image of all row events? There does not seem to be any test case for the --review option. Did you test this feature with binlog checksums enabled? What is the format for table name in --table and --review-tablename options? Is it DB.TABLE, where the quialifying DB is mandatory? This does not seem to be tested in the test case. Is it possible to flashback across multiple binlog files? What happens if the user attempts to use flashback with the option to fetch binlog files from the server rather than from local files?

==== Example ====

I have a table "t" in database "test", we can compare the output with --flashback and without. #client/mysqlbinlog /data/mysqldata_10.0/binlog/mysql-bin.000001 -vv -d test -T t --start-datetime="2013-03-27 14:54:00" > /tmp/1.sql #client/mysqlbinlog /data/mysqldata_10.0/binlog/mysql-bin.000001 -vv -uroot -d test -T t --start-datetime="2013-03-27 14:54:00" -B --review > /tmp/2.sql

Then, importing the output flashback file, it can flashback your database/table to the special time.

==== Implement ====

1. As we know, if binlog_format is ROW (binlog-row-image=FULL in 5.6 and later), all columns’ values are store in the row event, so we can get the data before mis-operation.

2. Just do following things: 2.1 Change Event Type, INSERT->DELETE, DELETE->INSERT 2.2 For Update_Event, swapping the SET part and WHERE part 2.3 Applying those events from the last one to the first one which mis-operation happened. 2.4 All the data will be recovered by inverse operations of mis-oprerations.

diff --git a/client/client_priv.h b/client/client_priv.h index c0c4954..31ad7df 100644 --- a/client/client_priv.h +++ b/client/client_priv.h @@ -65,6 +65,8 @@ enum options_client OPT_MYSQLDUMP_SLAVE_APPLY, OPT_MYSQLDUMP_SLAVE_DATA, OPT_MYSQLDUMP_INCLUDE_MASTER_HOST_PORT, + OPT_REVIEW, + OPT_REVIEW_DBNAME, OPT_REVIEW_TABLENAME, OPT_SLAP_CSV, OPT_SLAP_CREATE_STRING, OPT_SLAP_AUTO_GENERATE_SQL_LOAD_TYPE, OPT_SLAP_AUTO_GENERATE_WRITE_NUM, OPT_SLAP_AUTO_GENERATE_ADD_AUTO, diff --git a/client/mysqlbinlog.cc b/client/mysqlbinlog.cc index da41268..969540e 100644 --- a/client/mysqlbinlog.cc +++ b/client/mysqlbinlog.cc @@ -44,7 +44,6 @@ #include <welcome_copyright_notice.h> // ORACLE_WELCOME_COPYRIGHT_NOTICE

-#include "sql_string.h" // needed for Rpl_filter

Hm, why remove this include? I assume this is related to starting to use the `String' class in mysqlbinlog? I know there is quite a mess with mysqlbinlog.cc sharing parts of the server source code, so I could imagine something "interesting" going on here - can you explain, and probably put in a comment describing the issue?

#include "sql_list.h" // needed for Rpl_filter #include "rpl_filter.h"

@@ -63,6 +62,10 @@ Rpl_filter *binlog_filter= 0; /* Needed for Rpl_filter */ CHARSET_INFO* system_charset_info= &my_charset_utf8_general_ci;

+/* Needed for Flashback */ +DYNAMIC_ARRAY binlog_events; // Storing the events output string +String stop_event_string; // Storing the STOP_EVENT output string + char server_version[SERVER_VERSION_LENGTH]; ulong server_id = 0;

@@ -86,7 +89,7 @@ static const char *load_groups[]= static void error(const char *format, ...) ATTRIBUTE_FORMAT(printf, 1, 2); static void warning(const char *format, ...) ATTRIBUTE_FORMAT(printf, 1, 2);

-static bool one_database=0, to_last_remote_log= 0, disable_log_bin= 0; +static bool one_database=0, one_table=0, to_last_remote_log= 0, disable_log_bin= 0; static bool opt_hexdump= 0, opt_version= 0; const char *base64_output_mode_names[]= {"NEVER", "AUTO", "ALWAYS", "UNSPEC", "DECODE-ROWS", NullS}; @@ -96,6 +99,7 @@ TYPELIB base64_output_mode_typelib= static enum_base64_output_mode opt_base64_output_mode= BASE64_OUTPUT_UNSPEC; static char *opt_base64_output_mode_str= NullS; static char* database= 0; +static char* table= 0; static my_bool force_opt= 0, short_form= 0, remote_opt= 0; static my_bool debug_info_flag, debug_check_flag; static my_bool force_if_open_opt= 1; @@ -129,6 +133,10 @@ static MYSQL* mysql = NULL; static const char* dirname_for_local_load= 0; static bool opt_skip_annotate_row_events= 0;

+static my_bool opt_flashback; +static my_bool opt_review; +static char *review_dbname, *review_tablename; + /** Pointer to the Format_description_log_event of the currently active binlog.

@@ -788,6 +796,23 @@ print_skip_replication_statement(PRINT_EVENT_INFO *pinfo, const Log_event *ev) }

/** + Indicates whether the given table should be filtered out, + according to the --table=X option. + + @param log_tblname Name of table. + + @return nonzero if the table with the given name should be + filtered out, 0 otherwise. +*/ +static bool shall_skip_table(const char *log_tblname) +{ + return one_table && + (log_tblname != NULL) && + strcmp(log_tblname, table); +} + + +/** Prints the given event in base64 format.

The header is printed to the head cache and the body is printed to @@ -949,6 +974,10 @@ Exit_status process_event(PRINT_EVENT_INFO *print_event_info, Log_event *ev, Exit_status retval= OK_CONTINUE; IO_CACHE *const head= &print_event_info->head_cache;

+ /* Bypass flashback settings to event */ + ev->is_flashback= opt_flashback; + ev->need_review= opt_review; + /* Format events are not concerned by --offset and such, we always need to read them to be able to process the wanted events. @@ -985,7 +1014,7 @@ Exit_status process_event(PRINT_EVENT_INFO *print_event_info, Log_event *ev, retval= OK_STOP; goto end; } - if (!short_form) + if (!short_form && !opt_flashback) fprintf(result_file, "# at %s\n",llstr(pos,ll_buff));

if (!opt_hexdump) @@ -1210,12 +1239,123 @@ Exit_status process_event(PRINT_EVENT_INFO *print_event_info, Log_event *ev, case TABLE_MAP_EVENT: { Table_map_log_event *map= ((Table_map_log_event *)ev); - if (shall_skip_database(map->get_db_name())) + if (shall_skip_database(map->get_db_name()) || + shall_skip_table(map->get_table_name())) { print_event_info->m_table_map_ignored.set_table(map->get_table_id(), map); destroy_evt= FALSE; goto end; } + /* Create review table for Flashback */ + if (opt_review) + { + // Check table has created or not

^^^ "Check if the table was already created" ?

+ Table_map_log_event *exist_table; + exist_table= print_event_info->m_table_map.get_table(map->get_table_id()); + + if (!exist_table) + { + + MYSQL *conn; + MYSQL_RES *res; + MYSQL_ROW row; + char tmp_sql[8096]; + int tmp_sql_offset; + + conn = mysql_init(NULL); + if (!mysql_real_connect(conn, host, user, pass, + map->get_db_name(), port, sock, 0)) + { + fprintf(stderr, "%s\n", mysql_error(conn)); + exit(1); + } + + if (mysql_query(conn, "SET group_concat_max_len=10000;")) + { + fprintf(stderr, "%s\n", mysql_error(conn)); + exit(1); + } + + memset(tmp_sql, 0, sizeof(tmp_sql)); + sprintf(tmp_sql, " " + "SELECT Group_concat(cols) "

What happens if Group_concat() truncates the result? Maybe you need to first determine the maximum size, and SET SESSION group_concat_max_len accordingly. Or alternatively, you could just select each column as a row, and do the concatenation in the C code.

+ "FROM (SELECT 'op_type char(1)' cols " + " UNION ALL " + " SELECT Concat(column_name, '_old ', column_type, ' ', " + " IF(character_set_name IS NOT NULL, " + " Concat('character set ', character_set_name, ' '), ' '), " + " IF(collation_name IS NOT NULL, " + " Concat('collate ', collation_name, ' '), ' ')) cols " + " FROM information_schema.columns " + " WHERE table_schema = '%s' " + " AND table_name = '%s' "

This is vulnerable to sql injection. You need to use proper quoting functions. Also, the generated statement does not seem to work correctly if column names contain special characters. You should add test cases that tests this - table names with ' ` " \n characters in them, as well as column names.

+ " UNION ALL " + " SELECT Concat(column_name, '_new ', column_type, ' ', " + " IF(character_set_name IS NOT NULL, " + " Concat('character set ', character_set_name, ' '), ' '), " + " IF(collation_name IS NOT NULL, " + " Concat('collate ', collation_name, ' '), ' ')) cols " + " FROM information_schema.columns " + " WHERE table_schema = '%s' " + " AND table_name = '%s') tmp;", + map->get_db_name(), map->get_table_name(), + map->get_db_name(), map->get_table_name()); + + if (mysql_query(conn, tmp_sql)) + { + fprintf(stderr, "%s\n", mysql_error(conn)); + exit(1); + } + res = mysql_use_result(conn); + if ((row = mysql_fetch_row(res)) != NULL) // only one row + { + if (review_dbname) + { + ev->set_review_dbname(review_dbname); + } + else + { + ev->set_review_dbname(map->get_db_name()); + } + if (review_tablename) + { + ev->set_review_tablename(review_tablename); + } + else + { + memset(tmp_sql, 0, sizeof(tmp_sql)); + sprintf(tmp_sql, "__%s", map->get_table_name()); + ev->set_review_tablename(tmp_sql); + } + memset(tmp_sql, 0, sizeof(tmp_sql)); + tmp_sql_offset= sprintf(tmp_sql, "CREATE TABLE IF NOT EXISTS"); + tmp_sql_offset+= sprintf(tmp_sql + tmp_sql_offset, " `%s`.`%s` (%s) Engine = InnoDB%s", + ev->get_review_dbname(), ev->get_review_tablename(), row[0], print_event_info->delimiter); + } + fprintf(result_file, "%s\n", tmp_sql); + mysql_free_result(res); + mysql_close(conn); + } + else + { + char tmp_str[128]; + + if (review_dbname) + ev->set_review_dbname(review_dbname); + else + ev->set_review_dbname(map->get_db_name()); + + if (review_tablename) + ev->set_review_tablename(review_tablename); + else + { + memset(tmp_str, 0, sizeof(tmp_str)); + sprintf(tmp_str, "__%s", map->get_table_name()); + ev->set_review_tablename(tmp_str); + } + } + } + /* The Table map is to be printed, so it's just the time when we may print the kept Annotate event (if there is any). @@ -1281,6 +1421,41 @@ Exit_status process_event(PRINT_EVENT_INFO *print_event_info, Log_event *ev, */ if (ev) { + /* Holding event output if needed */ + if (!ev->output_buf.is_empty()) + { + String *tmp_str = new String[1]; + + //if (!short_form && opt_flashback) + //{ + // tmp_str->append("# at "); + // tmp_str->append(llstr(pos,ll_buff)); + // tmp_str->append("\n"); + //}

What is this? If it is not needed, remove rather than leaving stray commented-out code.

+ tmp_str->append(ev->output_buf); + + if (opt_flashback) + { + if (ev_type == STOP_EVENT) + stop_event_string.copy(*tmp_str);

What makes STOP_EVENT special? I don't understand the logic in the code here.

+ else + (void) push_dynamic(&binlog_events, (uchar *) tmp_str); + } + else + { + fprintf(result_file, "%s", tmp_str->ptr()); + delete tmp_str; + } + ev->free_output_buffer(); + } + //else + //{ + // if (!short_form && opt_flashback) + // fprintf(result_file, "# at %s\n",llstr(pos,ll_buff)); + //}

Same about commented-out code.

+ + if (remote_opt) + ev->temp_buf= 0; if (destroy_evt) /* destroy it later if not set (ignored table map) */ delete ev; } @@ -1339,6 +1514,11 @@ static struct my_option my_options[] = "already have. NOTE: you will need a SUPER privilege to use this option.", &disable_log_bin, &disable_log_bin, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0}, + {"flashback", 'B', "Flashback feature can rollback you committed data to a special time point," + "before Flashback feature writing a row, original row can insert to review-dbname.review-tablename," + "and mysqlbinlog will login mysql by user(-u) and password(-p) and host(-h).", + &opt_flashback, &opt_flashback, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0, + 0, 0}, {"force-if-open", 'F', "Force if binlog was not closed properly.", &force_if_open_opt, &force_if_open_opt, 0, GET_BOOL, NO_ARG, 1, 0, 0, 0, 0, 0}, @@ -1382,6 +1562,17 @@ static struct my_option my_options[] = "prefix for the file names.", &result_file_name, &result_file_name, 0, GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, + {"review", OPT_REVIEW, "Print review sql in output file.", + &opt_review, &opt_review, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0, + 0, 0}, + {"review-dbname", OPT_REVIEW_DBNAME, + "Writing flashback original row data into this db", + &review_dbname, &review_dbname, + 0, GET_STR_ALLOC, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, + {"review-tablename", OPT_REVIEW_TABLENAME, + "Writing flashback original row data into this table", + &review_tablename, &review_tablename, + 0, GET_STR_ALLOC, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, {"server-id", 0, "Extract only binlog entries created by the server having the given id.", &server_id, &server_id, 0, GET_ULONG, @@ -1445,6 +1636,9 @@ static struct my_option my_options[] = &stop_position, &stop_position, 0, GET_ULL, REQUIRED_ARG, (longlong)(~(my_off_t)0), BIN_LOG_HEADER_SIZE, (ulonglong)(~(my_off_t)0), 0, 0, 0}, + {"table", 'T', "List entries for just this table (local log only).", + &table, &table, 0, GET_STR_ALLOC, REQUIRED_ARG, + 0, 0, 0, 0, 0, 0}, {"to-last-log", 't', "Requires -R. Will not stop at the end of the \ requested binlog but rather continue printing until the end of the last \ binlog of the MySQL server. If you send the output to the same MySQL server, \ @@ -1554,6 +1748,7 @@ static void cleanup() { my_free(pass); my_free(database); + my_free(table); my_free(host); my_free(user); my_free(const_cast<char*>(dirname_for_local_load)); @@ -1624,6 +1819,9 @@ get_one_option(int optid, const struct my_option *opt __attribute__((unused)), break; #endif #include <sslopt-case.h> + case 'B': + opt_flashback= 1; + break; case 'd': one_database = 1; break; @@ -1645,10 +1843,16 @@ get_one_option(int optid, const struct my_option *opt __attribute__((unused)), case 'R': remote_opt= 1; break; + case 'T': + one_table= 1; + break; case OPT_MYSQL_PROTOCOL: opt_protocol= find_type_or_exit(argument, &sql_protocol_typelib, opt->name); break; + case OPT_REVIEW: + opt_review= 1; + break; case OPT_START_DATETIME: start_datetime= convert_str_to_timestamp(start_datetime_str); break; @@ -1848,7 +2052,7 @@ static Exit_status dump_log_entries(const char* logname) dump_local_log_entries(&print_event_info, logname));

/* Set delimiter back to semicolon */ - if (!opt_raw_mode) + if (!opt_raw_mode && !opt_flashback) fprintf(result_file, "DELIMITER ;\n"); strmov(print_event_info.delimiter, ";"); return rc; @@ -2648,6 +2852,8 @@ int main(int argc, char** argv) DBUG_ENTER("main"); DBUG_PROCESS(argv[0]);

+ (void) my_init_dynamic_array(&binlog_events, sizeof(String), 1024, 1024, MYF(0)); + my_init_time(); // for time functions tzset(); // set tzname

@@ -2784,6 +2990,35 @@ int main(int argc, char** argv) start_position= BIN_LOG_HEADER_SIZE; }

+ /* If enable flashback, need to print the events from the end to the beginning */ + if(opt_flashback) + { + ///if (binlog_events.elements > 0) + ///{ + /// String *event_str= dynamic_element(&binlog_events, 0, String*); + /// fprintf(result_file, "%s", event_str->ptr()); + /// delete event_str; + /// delete_dynamic_element(&binlog_events, 0); + ///}

Same about commented-out code.

+ uint i= 0; + for (i= binlog_events.elements; i > 0; --i) + { + String *event_str= dynamic_element(&binlog_events, i - 1, String*); + fprintf(result_file, "%s", event_str->ptr()); + delete event_str; + delete_dynamic_element(&binlog_events, i - 1); + } + fprintf(result_file, "COMMIT\n/*!*/;\n"); + }

Hm, so the entire output from flashback needs to be stored in RAM. I guess it is a reasonable limitation. But I think it should be documented, so users will be aware of this, and can eg. cut a large flashback into smaller pieces, if needed. But you don't seem to check the return value from push_dynamic() ? That seems a requirement to do, and give an appropriate error message for out-of-memory. (Though probably most often the OOM killer will get to it first...).

+ + /* Set delimiter back to semicolon */ + if (!stop_event_string.is_empty()) + fprintf(result_file, "%s", stop_event_string.ptr()); + if (opt_flashback) + fprintf(result_file, "DELIMITER ;\n"); + + delete_dynamic(&binlog_events); + if (!opt_raw_mode) { /* diff --git a/include/my_sys.h b/include/my_sys.h index 36530eb..4989f95 100644 --- a/include/my_sys.h +++ b/include/my_sys.h @@ -609,6 +609,7 @@ static inline size_t my_b_bytes_in_cache(const IO_CACHE *info) }

int my_b_copy_to_file(IO_CACHE *cache, FILE *file); +char* my_b_copy_to_string(IO_CACHE *cache, size_t *bytes_in_cache); // Used for Flashback

Why this addition? It does not seem to be used anywhere else in the patch?

my_off_t my_b_append_tell(IO_CACHE* info); my_off_t my_b_safe_tell(IO_CACHE* info); /* picks the correct tell() */ int my_b_pread(IO_CACHE *info, uchar *Buffer, size_t Count, my_off_t pos); diff --git a/mysql-test/suite/binlog/r/mysqlbinlog_row_flashback.result b/mysql-test/suite/binlog/r/mysqlbinlog_row_flashback.result new file mode 100644 index 0000000..c7c3493 --- /dev/null +++ b/mysql-test/suite/binlog/r/mysqlbinlog_row_flashback.result @@ -0,0 +1,459 @@ +SET binlog_format= ROW; +# +# Preparatory cleanup. +# +DROP TABLE IF EXISTS t1; +# +# We need a fixed timestamp to avoid varying results. +# +SET timestamp=1000000000; +# +# Delete all existing binary logs. +# +RESET MASTER; +CREATE TABLE t1 ( +c01 tinyint, +c02 smallint, +c03 mediumint, +c04 int, +c05 bigint, +c06 char(10), +c07 varchar(20), +c08 TEXT +); +# +# Insert data to t1 +# +INSERT INTO t1 VALUES(0,0,0,0,0,'','',''); +INSERT INTO t1 VALUES(1,2,3,4,5, "abc", "abcdefg", "abcedfghijklmnopqrstuvwxyz"); +INSERT INTO t1 VALUES(127, 32767, 8388607, 2147483647, 9223372036854775807, repeat('a', 10), repeat('a', 20), repeat('a', 65535)); +# +# Update t1 +# +UPDATE t1 SET c01=100 WHERE c02=0 OR c03=3; +# +# Clear t1 +# +DELETE FROM t1; +FLUSH LOGS; +# +# Without -B +# +/*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=1*/; +/*!40019 SET @@session.max_insert_delayed_threads=0*/; +/*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; +DELIMITER /*!*/; +# at # +#010909 9:46:40 server id 1 end_log_pos # Start: binlog v 4, server v #.##.## created 010909 9:46:40 at startup +ROLLBACK/*!*/; +# at # +#010909 9:46:40 server id 1 end_log_pos # Gtid list [] +# at # +#010909 9:46:40 server id 1 end_log_pos # Binlog checkpoint master-bin.000001 +# at # +#010909 9:46:40 server id 1 end_log_pos # GTID 0-1-1 ddl +/*!100101 SET @@session.skip_parallel_replication=0*//*!*/; +/*!100001 SET @@session.gtid_domain_id=0*//*!*/; +/*!100001 SET @@session.server_id=1*//*!*/; +/*!100001 SET @@session.gtid_seq_no=1*//*!*/; +# at # +#010909 9:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 +use `test`/*!*/; +SET TIMESTAMP=1000000000/*!*/; +SET @@session.pseudo_thread_id=#/*!*/; +SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/; +SET @@session.sql_mode=1342177280/*!*/; +SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/; +/*!\C latin1 *//*!*/; +SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=8/*!*/; +SET @@session.lc_time_names=0/*!*/; +SET @@session.collation_database=DEFAULT/*!*/; +CREATE TABLE t1 ( +c01 tinyint, +c02 smallint, +c03 mediumint, +c04 int, +c05 bigint, +c06 char(10), +c07 varchar(20), +c08 TEXT +) +/*!*/; +# at # +#010909 9:46:40 server id 1 end_log_pos # GTID 0-1-2 +/*!100001 SET @@session.gtid_seq_no=2*//*!*/; +BEGIN +/*!*/; +# at # +#010909 9:46:40 server id 1 end_log_pos # Table_map: `test`.`t1` mapped to number # +# at # +#010909 9:46:40 server id 1 end_log_pos # Write_rows: table id # flags: STMT_END_F +### INSERT INTO `test`.`t1` +### SET +### @1=0 /* TINYINT meta=0 nullable=1 is_null=0 */ +### @2=0 /* SHORTINT meta=0 nullable=1 is_null=0 */ +### @3=0 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ +### @4=0 /* INT meta=0 nullable=1 is_null=0 */ +### @5=0 /* LONGINT meta=0 nullable=1 is_null=0 */ +### @6='' /* STRING(10) meta=65034 nullable=1 is_null=0 */ +### @7='' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ +### @8='' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ +# at # +#010909 9:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 +SET TIMESTAMP=1000000000/*!*/; +COMMIT +/*!*/; +# at # +#010909 9:46:40 server id 1 end_log_pos # GTID 0-1-3 +/*!100001 SET @@session.gtid_seq_no=3*//*!*/; +BEGIN +/*!*/; +# at # +#010909 9:46:40 server id 1 end_log_pos # Table_map: `test`.`t1` mapped to number # +# at # +#010909 9:46:40 server id 1 end_log_pos # Write_rows: table id # flags: STMT_END_F +### INSERT INTO `test`.`t1` +### SET +### @1=1 /* TINYINT meta=0 nullable=1 is_null=0 */ +### @2=2 /* SHORTINT meta=0 nullable=1 is_null=0 */ +### @3=3 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ +### @4=4 /* INT meta=0 nullable=1 is_null=0 */ +### @5=5 /* LONGINT meta=0 nullable=1 is_null=0 */ +### @6='abc' /* STRING(10) meta=65034 nullable=1 is_null=0 */ +### @7='abcdefg' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ +### @8='abcedfghijklmnopqrstuvwxyz' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ +# at # +#010909 9:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 +SET TIMESTAMP=1000000000/*!*/; +COMMIT +/*!*/; +# at # +#010909 9:46:40 server id 1 end_log_pos # GTID 0-1-4 +/*!100001 SET @@session.gtid_seq_no=4*//*!*/; +BEGIN +/*!*/; +# at # +#010909 9:46:40 server id 1 end_log_pos # Table_map: `test`.`t1` mapped to number # +# at # +#010909 9:46:40 server id 1 end_log_pos # Write_rows: table id # flags: STMT_END_F +### INSERT INTO `test`.`t1` +### SET +### @1=127 /* TINYINT meta=0 nullable=1 is_null=0 */ +### @2=32767 /* SHORTINT meta=0 nullable=1 is_null=0 */ +### @3=8388607 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ +### @4=2147483647 /* INT meta=0 nullable=1 is_null=0 */ +### @5=9223372036854775807 /* LONGINT meta=0 nullable=1 is_null=0 */ +### @6='aaaaaaaaaa' /* STRING(10) meta=65034 nullable=1 is_null=0 */ +### @7='aaaaaaaaaaaaaaaaaaaa' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ +### 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aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ +# at # +#010909 9:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 +SET TIMESTAMP=1000000000/*!*/; +COMMIT +/*!*/; +# at # +#010909 9:46:40 server id 1 end_log_pos # GTID 0-1-5 +/*!100001 SET @@session.gtid_seq_no=5*//*!*/; +BEGIN +/*!*/; +# at # +#010909 9:46:40 server id 1 end_log_pos # Table_map: `test`.`t1` mapped to number # +# at # +#010909 9:46:40 server id 1 end_log_pos # Update_rows: table id # flags: STMT_END_F +### UPDATE `test`.`t1` +### WHERE +### @1=0 /* TINYINT meta=0 nullable=1 is_null=0 */ +### @2=0 /* SHORTINT meta=0 nullable=1 is_null=0 */ +### @3=0 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ +### @4=0 /* INT meta=0 nullable=1 is_null=0 */ +### @5=0 /* LONGINT meta=0 nullable=1 is_null=0 */ +### @6='' /* STRING(10) meta=65034 nullable=1 is_null=0 */ +### @7='' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ +### @8='' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ +### SET +### @1=100 /* TINYINT meta=0 nullable=1 is_null=0 */ +### @2=0 /* SHORTINT meta=0 nullable=1 is_null=0 */ +### @3=0 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ +### @4=0 /* INT meta=0 nullable=1 is_null=0 */ +### @5=0 /* LONGINT meta=0 nullable=1 is_null=0 */ +### @6='' /* STRING(10) meta=65034 nullable=1 is_null=0 */ +### @7='' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ +### @8='' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ +### UPDATE `test`.`t1` +### WHERE +### @1=1 /* TINYINT meta=0 nullable=1 is_null=0 */ +### @2=2 /* SHORTINT meta=0 nullable=1 is_null=0 */ +### @3=3 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ +### @4=4 /* INT meta=0 nullable=1 is_null=0 */ +### @5=5 /* LONGINT meta=0 nullable=1 is_null=0 */ +### @6='abc' /* STRING(10) meta=65034 nullable=1 is_null=0 */ +### @7='abcdefg' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ +### @8='abcedfghijklmnopqrstuvwxyz' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ +### SET +### @1=100 /* TINYINT meta=0 nullable=1 is_null=0 */ +### @2=2 /* SHORTINT meta=0 nullable=1 is_null=0 */ +### @3=3 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ +### @4=4 /* INT meta=0 nullable=1 is_null=0 */ +### @5=5 /* LONGINT meta=0 nullable=1 is_null=0 */ +### @6='abc' /* STRING(10) meta=65034 nullable=1 is_null=0 */ +### @7='abcdefg' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ +### @8='abcedfghijklmnopqrstuvwxyz' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ +# at # +#010909 9:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 +SET TIMESTAMP=1000000000/*!*/; +COMMIT +/*!*/; +# at # +#010909 9:46:40 server id 1 end_log_pos # GTID 0-1-6 +/*!100001 SET @@session.gtid_seq_no=6*//*!*/; +BEGIN +/*!*/; +# at # +#010909 9:46:40 server id 1 end_log_pos # Table_map: `test`.`t1` mapped to number # +# at # +# at # +#010909 9:46:40 server id 1 end_log_pos # Delete_rows: table id # +#010909 9:46:40 server id 1 end_log_pos # Delete_rows: table id # flags: STMT_END_F +### DELETE FROM `test`.`t1` +### WHERE +### @1=100 /* TINYINT meta=0 nullable=1 is_null=0 */ +### @2=0 /* SHORTINT meta=0 nullable=1 is_null=0 */ +### @3=0 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ +### @4=0 /* INT meta=0 nullable=1 is_null=0 */ +### @5=0 /* LONGINT meta=0 nullable=1 is_null=0 */ +### @6='' /* STRING(10) meta=65034 nullable=1 is_null=0 */ +### @7='' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ +### @8='' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ +### DELETE FROM `test`.`t1` +### WHERE +### @1=100 /* TINYINT meta=0 nullable=1 is_null=0 */ +### @2=2 /* SHORTINT meta=0 nullable=1 is_null=0 */ +### @3=3 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ +### @4=4 /* INT meta=0 nullable=1 is_null=0 */ +### @5=5 /* LONGINT meta=0 nullable=1 is_null=0 */ +### @6='abc' /* STRING(10) meta=65034 nullable=1 is_null=0 */ +### @7='abcdefg' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ +### @8='abcedfghijklmnopqrstuvwxyz' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ +### DELETE FROM `test`.`t1` +### WHERE +### @1=127 /* TINYINT meta=0 nullable=1 is_null=0 */ +### @2=32767 /* SHORTINT meta=0 nullable=1 is_null=0 */ +### @3=8388607 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ +### @4=2147483647 /* INT meta=0 nullable=1 is_null=0 */ +### @5=9223372036854775807 /* LONGINT meta=0 nullable=1 is_null=0 */ +### @6='aaaaaaaaaa' /* STRING(10) meta=65034 nullable=1 is_null=0 */ +### @7='aaaaaaaaaaaaaaaaaaaa' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ +### @8='aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa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/* BLOB/TEXT meta=2 nullable=1 is_null=0 */ +# at # +#010909 9:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 +SET TIMESTAMP=1000000000/*!*/; +COMMIT +/*!*/; +# at # +#010909 9:46:40 server id 1 end_log_pos # Rotate to master-bin.000002 pos: 4 +DELIMITER ; +# End of log file +ROLLBACK /* added by mysqlbinlog */; +/*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/; +/*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0*/; +# +# With -B +# +/*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=1*/; +/*!40019 SET @@session.max_insert_delayed_threads=0*/; +/*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; +DELIMITER /*!*/; +#010909 9:46:40 server id 1 end_log_pos # Start: binlog v 4, server v #.##.## created 010909 9:46:40 at startup +ROLLBACK/*!*/; +#010909 9:46:40 server id 1 end_log_pos # Gtid list [] +#010909 9:46:40 server id 1 end_log_pos # Binlog checkpoint master-bin.000001 +#010909 9:46:40 server id 1 end_log_pos # GTID 0-1-1 ddl +/*!100101 SET @@session.skip_parallel_replication=0*//*!*/; +/*!100001 SET @@session.gtid_domain_id=0*//*!*/; +/*!100001 SET @@session.server_id=1*//*!*/; +#010909 9:46:40 server id 1 end_log_pos # GTID 0-1-2 +#010909 9:46:40 server id 1 end_log_pos # Table_map: `test`.`t1` mapped to number # +#010909 9:46:40 server id 1 end_log_pos # GTID 0-1-3 +#010909 9:46:40 server id 1 end_log_pos # Table_map: `test`.`t1` mapped to number # +#010909 9:46:40 server id 1 end_log_pos # GTID 0-1-4 +#010909 9:46:40 server id 1 end_log_pos # Table_map: `test`.`t1` mapped to number # +#010909 9:46:40 server id 1 end_log_pos # GTID 0-1-5 +#010909 9:46:40 server id 1 end_log_pos # Table_map: `test`.`t1` mapped to number # +#010909 9:46:40 server id 1 end_log_pos # GTID 0-1-6 +#010909 9:46:40 server id 1 end_log_pos # Table_map: `test`.`t1` mapped to number #

Hm, what are these? Are they left-overs from reading forward over the binlog prior to emitting flashback operations? If these are just comments, I suppose they are not harmful, but they might be confusing? It seems the rows_log_event and xid_events are filtered out, maybe the table_map and gtid events should also not be printed in -B mode?

+#010909 9:46:40 server id 1 end_log_pos # Rotate to master-bin.000002 pos: 4 +#010909 9:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 +SET TIMESTAMP=1000000000/*!*/; +BEGIN +/*!*/; +#010909 9:46:40 server id 1 end_log_pos # Delete_rows: table id # +#010909 9:46:40 server id 1 end_log_pos # Delete_rows: table id # flags: STMT_END_F

Again, why these Delete_rows comments? Do I understand correctly, that in the "normal" output, this would be BINLOG statements, where the events are changed INSERT<->DELETE and so on? Maybe these comments should be changed as well, to avoid confusion.

+### INSERT INTO `test`.`t1` +### SET +### @1=100 /* TINYINT meta=0 nullable=1 is_null=0 */ +### @2=0 /* SHORTINT meta=0 nullable=1 is_null=0 */ +### @3=0 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ +### @4=0 /* INT meta=0 nullable=1 is_null=0 */ +### @5=0 /* LONGINT meta=0 nullable=1 is_null=0 */ +### @6='' /* STRING(10) meta=65034 nullable=1 is_null=0 */ +### @7='' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ +### @8='' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ +### INSERT INTO `test`.`t1` +### SET +### @1=100 /* TINYINT meta=0 nullable=1 is_null=0 */ +### @2=2 /* SHORTINT meta=0 nullable=1 is_null=0 */ +### @3=3 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ +### @4=4 /* INT meta=0 nullable=1 is_null=0 */ +### @5=5 /* LONGINT meta=0 nullable=1 is_null=0 */ +### @6='abc' /* STRING(10) meta=65034 nullable=1 is_null=0 */ +### @7='abcdefg' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ +### @8='abcedfghijklmnopqrstuvwxyz' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ +### INSERT INTO `test`.`t1` +### SET +### @1=127 /* TINYINT meta=0 nullable=1 is_null=0 */ +### @2=32767 /* SHORTINT meta=0 nullable=1 is_null=0 */ +### @3=8388607 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ +### @4=2147483647 /* INT meta=0 nullable=1 is_null=0 */ +### @5=9223372036854775807 /* LONGINT meta=0 nullable=1 is_null=0 */ +### @6='aaaaaaaaaa' /* STRING(10) meta=65034 nullable=1 is_null=0 */ +### @7='aaaaaaaaaaaaaaaaaaaa' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ +### @8='aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa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/* BLOB/TEXT meta=2 nullable=1 is_null=0 */

So it looks like the flashback events are output in the same order that they were originally executed? Doesn't it need to be in the reverse order? I am thinking in particular of transactions that UPDATE the same row multiple times. For example: BEGIN; UPDATE t1 SET a=3 WHERE a=2 AND pk=1; UPDATE t1 SET a=4 WHERE a=3 AND pk=1; COMMIT; This needs to appear in the flashback output in the reverse order: BEGIN; UPDATE t1 SET a=3 WHERE a=4 AND pk=1; UPDATE t1 SET a=2 WHERE a=3 AND pk=1; COMMIT; If flashback'ed in the same order as originally executed, it would leave the wrong value "3" in a (or maybe fail with a "cannot find row" error). In any case, I think a test case for this should be added.

+#010909 9:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 +SET TIMESTAMP=1000000000/*!*/; +BEGIN +/*!*/; +#010909 9:46:40 server id 1 end_log_pos # Update_rows: table id # flags: STMT_END_F +### UPDATE `test`.`t1` +### WHERE +### @1=100 /* TINYINT meta=0 nullable=1 is_null=0 */ +### @2=2 /* SHORTINT meta=0 nullable=1 is_null=0 */ +### @3=3 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ +### @4=4 /* INT meta=0 nullable=1 is_null=0 */ +### @5=5 /* LONGINT meta=0 nullable=1 is_null=0 */ +### @6='abc' /* STRING(10) meta=65034 nullable=1 is_null=0 */ +### @7='abcdefg' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ +### @8='abcedfghijklmnopqrstuvwxyz' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ +### SET +### @1=1 /* TINYINT meta=0 nullable=1 is_null=0 */ +### @2=2 /* SHORTINT meta=0 nullable=1 is_null=0 */ +### @3=3 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ +### @4=4 /* INT meta=0 nullable=1 is_null=0 */ +### @5=5 /* LONGINT meta=0 nullable=1 is_null=0 */ +### @6='abc' /* STRING(10) meta=65034 nullable=1 is_null=0 */ +### @7='abcdefg' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ +### @8='abcedfghijklmnopqrstuvwxyz' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ +### UPDATE `test`.`t1` +### WHERE +### @1=100 /* TINYINT meta=0 nullable=1 is_null=0 */ +### @2=0 /* SHORTINT meta=0 nullable=1 is_null=0 */ +### @3=0 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ +### @4=0 /* INT meta=0 nullable=1 is_null=0 */ +### @5=0 /* LONGINT meta=0 nullable=1 is_null=0 */ +### @6='' /* STRING(10) meta=65034 nullable=1 is_null=0 */ +### @7='' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ +### @8='' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ +### SET +### @1=0 /* TINYINT meta=0 nullable=1 is_null=0 */ +### @2=0 /* SHORTINT meta=0 nullable=1 is_null=0 */ +### @3=0 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ +### @4=0 /* INT meta=0 nullable=1 is_null=0 */ +### @5=0 /* LONGINT meta=0 nullable=1 is_null=0 */ +### @6='' /* STRING(10) meta=65034 nullable=1 is_null=0 */ +### @7='' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ +### @8='' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ +#010909 9:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0

So this Query event was originally the COMMIT event, right? Shouldn't there be a COMMIT in the flashback output also? The test case seems to use MyISAM. Probably there should be also tests with InnoDB (maybe a good idea to have both a t1 MyISAM and a t2 InnoDB, to test mixing them, also testing mixed MyISAM/InnoDB transactions).

+SET TIMESTAMP=1000000000/*!*/; +BEGIN +/*!*/; +#010909 9:46:40 server id 1 end_log_pos # Write_rows: table id # flags: STMT_END_F +### DELETE FROM `test`.`t1` +### WHERE +### @1=127 /* TINYINT meta=0 nullable=1 is_null=0 */ +### @2=32767 /* SHORTINT meta=0 nullable=1 is_null=0 */ +### @3=8388607 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ +### @4=2147483647 /* INT meta=0 nullable=1 is_null=0 */ +### @5=9223372036854775807 /* LONGINT meta=0 nullable=1 is_null=0 */ +### @6='aaaaaaaaaa' /* STRING(10) meta=65034 nullable=1 is_null=0 */ +### @7='aaaaaaaaaaaaaaaaaaaa' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ +### @8='aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa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/* BLOB/TEXT meta=2 nullable=1 is_null=0 */ +#010909 9:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 +SET TIMESTAMP=1000000000/*!*/; +BEGIN +/*!*/; +#010909 9:46:40 server id 1 end_log_pos # Write_rows: table id # flags: STMT_END_F +### DELETE FROM `test`.`t1` +### WHERE +### @1=1 /* TINYINT meta=0 nullable=1 is_null=0 */ +### @2=2 /* SHORTINT meta=0 nullable=1 is_null=0 */ +### @3=3 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ +### @4=4 /* INT meta=0 nullable=1 is_null=0 */ +### @5=5 /* LONGINT meta=0 nullable=1 is_null=0 */ +### @6='abc' /* STRING(10) meta=65034 nullable=1 is_null=0 */ +### @7='abcdefg' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ +### @8='abcedfghijklmnopqrstuvwxyz' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ +#010909 9:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 +SET TIMESTAMP=1000000000/*!*/; +BEGIN +/*!*/; +#010909 9:46:40 server id 1 end_log_pos # Write_rows: table id # flags: STMT_END_F +### DELETE FROM `test`.`t1` +### WHERE +### @1=0 /* TINYINT meta=0 nullable=1 is_null=0 */ +### @2=0 /* SHORTINT meta=0 nullable=1 is_null=0 */ +### @3=0 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ +### @4=0 /* INT meta=0 nullable=1 is_null=0 */ +### @5=0 /* LONGINT meta=0 nullable=1 is_null=0 */ +### @6='' /* STRING(10) meta=65034 nullable=1 is_null=0 */ +### @7='' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ +### @8='' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ +#010909 9:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 +use `test`/*!*/; +SET TIMESTAMP=1000000000/*!*/; +SET @@session.pseudo_thread_id=#/*!*/; +SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/; +SET @@session.sql_mode=1342177280/*!*/; +SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/; +/*!\C latin1 *//*!*/; +SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=8/*!*/; +SET @@session.lc_time_names=0/*!*/; +SET @@session.collation_database=DEFAULT/*!*/; +COMMIT +/*!*/; +DELIMITER ; +# End of log file +ROLLBACK /* added by mysqlbinlog */; +/*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/; +/*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0*/; +# +# Insert data to t1 +# +TRUNCATE TABLE t1; +INSERT INTO t1 VALUES(0,0,0,0,0,'','',''); +INSERT INTO t1 VALUES(1,2,3,4,5, "abc", "abcdefg", "abcedfghijklmnopqrstuvwxyz"); +INSERT INTO t1 VALUES(127, 32767, 8388607, 2147483647, 9223372036854775807, repeat('a', 10), repeat('a', 20), repeat('a', 60)); +# +# Delete all existing binary logs. +# +RESET MASTER; +SELECT * FROM t1; +c01 c02 c03 c04 c05 c06 c07 c08 +0 0 0 0 0 +1 2 3 4 5 abc abcdefg abcedfghijklmnopqrstuvwxyz +127 32767 8388607 2147483647 9223372036854775807 aaaaaaaaaa aaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa +# +# Operate some data +# +UPDATE t1 SET c01=20; +UPDATE t1 SET c02=200; +UPDATE t1 SET c03=2000; +DELETE FROM t1; +FLUSH LOGS; +# +# With -B +# +SELECT * FROM t1; +c01 c02 c03 c04 c05 c06 c07 c08 +127 32767 8388607 2147483647 9223372036854775807 aaaaaaaaaa aaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa +0 0 0 0 0 +1 2 3 4 5 abc abcdefg abcedfghijklmnopqrstuvwxyz +DROP TABLE t1; diff --git a/mysql-test/suite/binlog/t/mysqlbinlog_row_flashback.test b/mysql-test/suite/binlog/t/mysqlbinlog_row_flashback.test new file mode 100644 index 0000000..eb0f14f --- /dev/null +++ b/mysql-test/suite/binlog/t/mysqlbinlog_row_flashback.test @@ -0,0 +1,110 @@ +SET binlog_format= ROW;

This should not be needed, since you have the proper have_binlog_format_row.inc. Or is there some specific reason it is needed, and if so, what?

+ +--source include/have_log_bin.inc +--source include/have_binlog_format_row.inc + +--echo # +--echo # Preparatory cleanup. +--echo # +--disable_warnings +DROP TABLE IF EXISTS t1; +--enable_warnings + +--echo # +--echo # We need a fixed timestamp to avoid varying results. +--echo # +SET timestamp=1000000000; + +--echo # +--echo # Delete all existing binary logs. +--echo # +RESET MASTER; + + +CREATE TABLE t1 ( + c01 tinyint, + c02 smallint, + c03 mediumint, + c04 int, + c05 bigint, + c06 char(10), + c07 varchar(20), + c08 TEXT +); + +--echo # +--echo # Insert data to t1 +--echo # +INSERT INTO t1 VALUES(0,0,0,0,0,'','',''); +INSERT INTO t1 VALUES(1,2,3,4,5, "abc", "abcdefg", "abcedfghijklmnopqrstuvwxyz"); +INSERT INTO t1 VALUES(127, 32767, 8388607, 2147483647, 9223372036854775807, repeat('a', 10), repeat('a', 20), repeat('a', 65535)); + + +--echo # +--echo # Update t1 +--echo # +UPDATE t1 SET c01=100 WHERE c02=0 OR c03=3; + +--echo # +--echo # Clear t1 +--echo # +DELETE FROM t1; + +FLUSH LOGS; + +--echo # +--echo # Without -B +--echo # + +let $MYSQLD_DATADIR= `select @@datadir`; +--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR +--replace_regex /SQL_LOAD_MB-[0-9]-[0-9]/SQL_LOAD_MB-#-#/ /exec_time=[0-9]*/exec_time=#/ /end_log_pos [0-9]*/end_log_pos #/ /# at [0-9]*/# at #/ /thread_id=[0-9]*/thread_id=#/ /table id [0-9]*/table id #/ /mapped to number [0-9]*/mapped to number #/ /server v [^ ]*/server v #.##.##/ /(@[0-9]*=[0-9]*[.][0-9]{1,3})[0-9e+-]*[^ ]*(.*(FLOAT|DOUBLE).*[*].)/\1...\2/ +--exec $MYSQL_BINLOG --base64-output=decode-rows -v -v $MYSQLD_DATADIR/master-bin.000001 + +--echo # +--echo # With -B +--echo # + +let $MYSQLD_DATADIR= `select @@datadir`; +--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR +--replace_regex /SQL_LOAD_MB-[0-9]-[0-9]/SQL_LOAD_MB-#-#/ /exec_time=[0-9]*/exec_time=#/ /end_log_pos [0-9]*/end_log_pos #/ /# at [0-9]*/# at #/ /thread_id=[0-9]*/thread_id=#/ /table id [0-9]*/table id #/ /mapped to number [0-9]*/mapped to number #/ /server v [^ ]*/server v #.##.##/ /(@[0-9]*=[0-9]*[.][0-9]{1,3})[0-9e+-]*[^ ]*(.*(FLOAT|DOUBLE).*[*].)/\1...\2/ +--exec $MYSQL_BINLOG -B --base64-output=decode-rows -v -v $MYSQLD_DATADIR/master-bin.000001 + +--echo # +--echo # Insert data to t1 +--echo # +TRUNCATE TABLE t1; +INSERT INTO t1 VALUES(0,0,0,0,0,'','',''); +INSERT INTO t1 VALUES(1,2,3,4,5, "abc", "abcdefg", "abcedfghijklmnopqrstuvwxyz"); +INSERT INTO t1 VALUES(127, 32767, 8388607, 2147483647, 9223372036854775807, repeat('a', 10), repeat('a', 20), repeat('a', 60)); + +--echo # +--echo # Delete all existing binary logs. +--echo # +RESET MASTER; +SELECT * FROM t1; + +--echo # +--echo # Operate some data +--echo # + +UPDATE t1 SET c01=20; +UPDATE t1 SET c02=200; +UPDATE t1 SET c03=2000; + +DELETE FROM t1; + +FLUSH LOGS; + +--echo # +--echo # With -B +--echo # + +let $MYSQLD_DATADIR= `select @@datadir`; +--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR +--exec $MYSQL_BINLOG -B -vv $MYSQLD_DATADIR/master-bin.000001 > $MYSQLTEST_VARDIR/tmp/mysqlbinlog_row_flashback.sql +--exec $MYSQL -e "SET binlog_format= ROW; source $MYSQLTEST_VARDIR/tmp/mysqlbinlog_row_flashback.sql;" + +SELECT * FROM t1; + +DROP TABLE t1; diff --git a/sql/log_event.cc b/sql/log_event.cc index ea0afdd..4cf54d3 100644 --- a/sql/log_event.cc +++ b/sql/log_event.cc @@ -299,17 +299,28 @@ class Write_on_release_cache constructor, but it would be possible to create a subclass holding the IO_CACHE itself. */ - Write_on_release_cache(IO_CACHE *cache, FILE *file, flag_set flags = 0) - : m_cache(cache), m_file(file), m_flags(flags) + Write_on_release_cache(IO_CACHE *cache, FILE *file, flag_set flags = 0, Log_event *ev = NULL) + : m_cache(cache), m_file(file), m_flags(flags), m_ev(ev) { reinit_io_cache(m_cache, WRITE_CACHE, 0L, FALSE, TRUE); }

~Write_on_release_cache() { - copy_event_cache_to_file_and_reinit(m_cache, m_file); - if (m_flags & FLUSH_F) - fflush(m_file); + if(m_ev == NULL) + { + copy_event_cache_to_file_and_reinit(m_cache, m_file); + if (m_flags | FLUSH_F) + fflush(m_file); + } + else // if m_ev<>NULL, then storing the output in output_buf + { + size_t bytes_in_cache= 0; + char *buff= 0; + buff= copy_event_cache_to_string_and_reinit(m_cache, &bytes_in_cache); + m_ev->output_buf.append(buff, bytes_in_cache); + my_free(buff); + } }

/* @@ -339,6 +350,7 @@ class Write_on_release_cache IO_CACHE *m_cache; FILE *m_file; flag_set m_flags; + Log_event *m_ev; // Used for Flashback };

/* @@ -2356,7 +2368,7 @@ log_event_print_value(IO_CACHE *file, const uchar *ptr, d= (ulong) (i64 / 1000000); t= (ulong) (i64 % 1000000);

- my_b_printf(file, "%04d-%02d-%02d %02d:%02d:%02d", + my_b_printf(file, "'%04d-%02d-%02d %02d:%02d:%02d'", (int) (d / 10000), (int) (d % 10000) / 100, (int) (d % 100), (int) (t / 10000), (int) (t % 10000) / 100, (int) t % 100);

Why is this change needed? Maybe it is so that SQL output for --review can work? There does not seem to be any test case for this, should probably be added.

return 8; @@ -2590,22 +2602,29 @@ size_t Rows_log_event::print_verbose_one_row(IO_CACHE *file, table_def *td, PRINT_EVENT_INFO *print_event_info, MY_BITMAP *cols_bitmap, - const uchar *value, const uchar *prefix) + const uchar *value, const uchar *prefix, + const my_bool only_parse)

Can you come up with a better name for "only_parse"? It is not clear to me what it means, I think it is an option if the function needs to instead generate the SQL for filling-in the flashback review table?

{ const uchar *value0= value; const uchar *null_bits= value; uint null_bit_index= 0; char typestr[64]= ""; - + + /* Storing the review SQL */

"Storing the SQL for filling in the flashback review table" would be easier to understand.

+ IO_CACHE *review_sql= &print_event_info->review_sql_cache; + uchar *begin_pos; + size_t bytes_in_cache; + /* Skip metadata bytes which gives the information about nullabity of master columns. Master writes one bit for each affected column. */

value+= (bitmap_bits_set(cols_bitmap) + 7) / 8; - - my_b_printf(file, "%s", prefix); - + + if (!only_parse) + my_b_printf(file, "%s", prefix); + for (size_t i= 0; i < td->size(); i ++) { size_t size; @@ -2614,8 +2633,10 @@ Rows_log_event::print_verbose_one_row(IO_CACHE *file, table_def *td,

if (bitmap_is_set(cols_bitmap, i) == 0) continue; - - my_b_printf(file, "### @%d=", static_cast<int>(i + 1)); + + if (!only_parse) + my_b_printf(file, "### @%d=", static_cast<int>(i + 1)); + if (!is_null) { size_t fsize= td->calc_field_size((uint)i, (uchar*) value); @@ -2627,9 +2648,67 @@ Rows_log_event::print_verbose_one_row(IO_CACHE *file, table_def *td, return 0; } } - if (!(size= log_event_print_value(file,is_null? NULL: value, - td->type(i), td->field_metadata(i), - typestr, sizeof(typestr)))) + + if (!only_parse) + { + begin_pos= file->write_pos; + size= log_event_print_value(file,is_null? NULL: value, + td->type(i), td->field_metadata(i), + typestr, sizeof(typestr)); + + if (need_review) + { + String tmp_str, hex_str; + IO_CACHE tmp_cache; + char *buff; + + // Using a tmp IO_CACHE to get the value output + open_cached_file(&tmp_cache, NULL, NULL, 0, MYF(MY_WME | MY_NABP)); + size= log_event_print_value(&tmp_cache, is_null? NULL: value, + td->type(i), td->field_metadata(i), + typestr, sizeof(typestr)); + buff= copy_event_cache_to_string_and_reinit(&tmp_cache, &bytes_in_cache); + close_cached_file(&tmp_cache); + + switch (td->type(i)) // Covert string to Hex + { + case MYSQL_TYPE_VARCHAR: + case MYSQL_TYPE_VAR_STRING: + case MYSQL_TYPE_STRING: + case MYSQL_TYPE_BLOB: + // Avoid write_pos changed to a new area + tmp_str.free();

I do not understand this comment or code ... the tmp_str is newly created at this point. Is it because tmp_str.free() is needed to initialise it to empty? Maybe you can clarify.

+ tmp_str.append(buff + 1, bytes_in_cache - 2); // Removing quotation marks + if (hex_str.alloc(tmp_str.length()*2+1)) // if no memory + { + tmp_str.free(); + tmp_str.append(buff, bytes_in_cache); + my_b_printf(review_sql, ", %s", tmp_str.ptr());

But what happens if no memory? Does it just silently output wrong SQL (SQL injection...)? Why doesn't it produce a proper error instead?

+ break; + } + octet2hex((char*) hex_str.ptr(), tmp_str.ptr(), tmp_str.length()); + my_b_printf(review_sql, ", UNHEX('%s')", hex_str.ptr()); + break; + default: + tmp_str.free(); + tmp_str.append(buff, bytes_in_cache); + my_b_printf(review_sql, ", %s", tmp_str.ptr()); + break; + } + my_free(buff); + } + } + else + { + IO_CACHE tmp_cache; + open_cached_file(&tmp_cache, NULL, NULL, 0, MYF(MY_WME | MY_NABP)); + size= log_event_print_value(&tmp_cache,is_null? NULL: value, + td->type(i), td->field_metadata(i), + typestr, sizeof(typestr)); + close_cached_file(&tmp_cache); + } + + if (!size) return 0;

if (!is_null) @@ -2637,23 +2716,91 @@ Rows_log_event::print_verbose_one_row(IO_CACHE *file, table_def *td,

if (print_event_info->verbose > 1) { - my_b_write(file, (uchar*)" /* ", 4); + if (!only_parse) + { + my_b_write(file, (uchar*)" /* ", 4);

- my_b_printf(file, "%s ", typestr); - - my_b_printf(file, "meta=%d nullable=%d is_null=%d ", - td->field_metadata(i), - td->maybe_null(i), is_null); - my_b_write(file, (uchar*)"*/", 2); + my_b_printf(file, "%s ", typestr); + + my_b_printf(file, "meta=%d nullable=%d is_null=%d ", + td->field_metadata(i), + td->maybe_null(i), is_null); + my_b_write(file, (uchar*)"*/", 2); + } } - - my_b_write_byte(file, '\n'); - + + if (!only_parse) + my_b_write_byte(file, '\n'); + null_bit_index++; } return value - value0; }

+void Rows_log_event::exchange_update_rows(PRINT_EVENT_INFO *print_event_info, + uchar *rows_buff)

Ok, so I think this function handles the problem that I mentioned earlier - that the individual rows for UPDATE need to be flashbacked in the reverse order for things to work. Please explain this in a comment describing the function - and please add test cases that tests this. I'm also wondering - isn't the same swapping needed for INSERT and DELETE, in case of self-referencing foreign keys? CREATE TABLE t1 (a INT PRIMARY KEY, b INT, FOREIGN KEY my_fk(b) REFERENCES t1(a)) ENGINE=InnoDB; BEGIN; INSERT INTO t1 VALUES (1, NULL); INSERT INTO t1 VALUES (2, 1), (3, 2), (4, 3); COMMIT; DELETE FROM t1 ORDER BY a DESC; You should add test cases for these kinds of issues as well.

+{ + Table_map_log_event *map; + table_def *td; + DYNAMIC_ARRAY rows_arr; + uchar *data_buff= rows_buff + m_rows_before_size; + + if (!(map= print_event_info->m_table_map.get_table(m_table_id)) || + !(td= map->create_table_def())) + return; + + (void) my_init_dynamic_array(&rows_arr, sizeof(String), 8, 8, MYF(0)); + + for (uchar *value= m_rows_buf; value < m_rows_end; ) + { + uchar *start_pos= value; + size_t length1; + if (!(length1= print_verbose_one_row(NULL, td, print_event_info, + &m_cols, value, + (const uchar*) "", TRUE))) + return; + value+= length1; + + size_t length2; + if (!(length2= print_verbose_one_row(NULL, td, print_event_info, + &m_cols, value, + (const uchar*) "", TRUE))) + return; + value+= length2; + + /* Swap SET and WHERE part */ + uchar *swap_buff1= (uchar *) my_malloc(length1, MYF(0)); + uchar *swap_buff2= (uchar *) my_malloc(length2, MYF(0)); + + memcpy(swap_buff1, start_pos, length1); // SET part + memcpy(swap_buff2, start_pos + length1, length2); // WHERE part + + memcpy(start_pos, swap_buff2, length2); + memcpy(start_pos + length2, swap_buff1, length1); + + /* Copying one row into a buff, and pushing into the array */ + String *one_row= new String[1]; + one_row->append((const char *)start_pos, (uint32)(length1 + length2), &my_charset_bin); + (void) push_dynamic(&rows_arr, (uchar *) one_row); + + /* Free tmp buffers */ + my_free(swap_buff1); + my_free(swap_buff2); + } + + /* Copying rows from the end to the begining into event */ + uchar *pos= data_buff; + for (uint i= rows_arr.elements; i > 0; --i) + { + String *one_row= dynamic_element(&rows_arr, i - 1, String*); + + memcpy(pos, (uchar *)one_row->ptr(), one_row->length()); + pos+= one_row->length(); + delete one_row; + } + delete_dynamic(&rows_arr); +} +

/** Print a row event into IO cache in human readable form (in SQL format) @@ -2667,8 +2814,10 @@ void Rows_log_event::print_verbose(IO_CACHE *file, Table_map_log_event *map; table_def *td; const char *sql_command, *sql_clause1, *sql_clause2; + const char *sql_command_short; Log_event_type general_type_code= get_general_type_code(); - + IO_CACHE *review_sql= &print_event_info->review_sql_cache; + if (m_extra_row_data) { uint8 extra_data_len= m_extra_row_data[EXTRA_ROW_INFO_LEN_OFFSET]; @@ -2698,19 +2847,23 @@ void Rows_log_event::print_verbose(IO_CACHE *file, sql_command= "INSERT INTO"; sql_clause1= "### SET\n"; sql_clause2= NULL; + sql_command_short= "I"; break; case DELETE_ROWS_EVENT: sql_command= "DELETE FROM"; sql_clause1= "### WHERE\n"; sql_clause2= NULL; + sql_command_short= "D"; break; case UPDATE_ROWS_EVENT: sql_command= "UPDATE"; sql_clause1= "### WHERE\n"; sql_clause2= "### SET\n"; + sql_command_short= "U"; break; default: sql_command= sql_clause1= sql_clause2= NULL; + sql_command_short= ""; DBUG_ASSERT(0); /* Not possible */ }

@@ -2736,6 +2889,11 @@ void Rows_log_event::print_verbose(IO_CACHE *file, my_b_printf(file, "### %s %`s.%`s\n", sql_command, map->get_db_name(), map->get_table_name()); + + if (need_review) + my_b_printf(review_sql, "\nINSERT INTO `%s`.`%s` VALUES ('%s'",

This is vulnerable to sql injection on the database and table names. Check the existing code, there are functions that handle quoting the names correctly. By the way, there is also the issue that depending on the SQL mode, `` or "" are the correct quoting characters to use. I seem to recall that there is an SQL mode where `` cannot be used to quote names? But I cannot seem to find it just now, so maybe I'm wrong, and `` can always be used?

+ map->get_review_dbname(), map->get_review_tablename(), sql_command_short); + /* Print the first image */ if (!(length= print_verbose_one_row(file, td, print_event_info, &m_cols, value, @@ -2752,6 +2910,15 @@ void Rows_log_event::print_verbose(IO_CACHE *file, goto end; value+= length; } + else + { + if (need_review) + for (size_t i= 0; i < td->size(); i ++) + my_b_printf(review_sql, ", NULL");

Does this generate an insert of a row with all NULLs? What is the purpose of this? If this is to handle the case where the server logged an event in not full rows mode, shouldn't this generate a sensible error to the user instead? Maybe with an option to override the error (if DBA is desparate and wants to just recover whatever can be recovered), rather than silently do a partial flashback leaving the data in unknown and inconsistent state? Same about query_log_event, what happens if those are found during flashback? Shouldn't it generate an error?

+ } + + if (need_review) + my_b_printf(review_sql, ")%s\n", print_event_info->delimiter); }

end: @@ -2767,7 +2934,7 @@ void Log_event::print_base64(IO_CACHE* file, PRINT_EVENT_INFO* print_event_info, bool more) { - const uchar *ptr= (const uchar *)temp_buf; + uchar *ptr= (uchar *)temp_buf; uint32 size= uint4korr(ptr + EVENT_LEN_OFFSET); DBUG_ENTER("Log_event::print_base64");

@@ -2779,6 +2946,32 @@ void Log_event::print_base64(IO_CACHE* file, DBUG_VOID_RETURN; }

+ if (is_flashback) + { + switch (ptr[EVENT_TYPE_OFFSET]) { + case WRITE_ROWS_EVENT: + ptr[EVENT_TYPE_OFFSET]= DELETE_ROWS_EVENT; + break; + case WRITE_ROWS_EVENT_V1: + ptr[EVENT_TYPE_OFFSET]= DELETE_ROWS_EVENT_V1; + break; + case DELETE_ROWS_EVENT: + ptr[EVENT_TYPE_OFFSET]= WRITE_ROWS_EVENT; + break; + case DELETE_ROWS_EVENT_V1: + ptr[EVENT_TYPE_OFFSET]= WRITE_ROWS_EVENT_V1; + break; + case UPDATE_ROWS_EVENT: + case UPDATE_ROWS_EVENT_V1: + Rows_log_event *ev= NULL; + ev= new Update_rows_log_event((const char*) ptr, size, + glob_description_event); + ev->exchange_update_rows(print_event_info, ptr); + delete ev; + break; + } + } + if (base64_encode(ptr, (size_t) size, tmp_str)) { DBUG_ASSERT(0); @@ -2795,7 +2988,7 @@ void Log_event::print_base64(IO_CACHE* file, my_b_printf(file, "'%s\n", print_event_info->delimiter); }

- if (print_event_info->verbose) + if (print_event_info->verbose || need_review) { Rows_log_event *ev= NULL; Log_event_type et= (Log_event_type) ptr[EVENT_TYPE_OFFSET]; @@ -2811,6 +3004,11 @@ void Log_event::print_base64(IO_CACHE* file, Table_map_log_event *map; map= new Table_map_log_event((const char*) ptr, size, glob_description_event); + if (need_review) + { + map->set_review_dbname(m_review_dbname.ptr()); + map->set_review_tablename(m_review_tablename.ptr()); + } print_event_info->m_table_map.set_table(map->get_table_id(), map); break; } @@ -2838,14 +3036,23 @@ void Log_event::print_base64(IO_CACHE* file, default: break; } - + if (ev) { - ev->print_verbose(file, print_event_info); + ev->need_review= need_review; + if (print_event_info->verbose) + ev->print_verbose(file, print_event_info); + else + { + IO_CACHE tmp_cache; + open_cached_file(&tmp_cache, NULL, NULL, 0, MYF(MY_WME | MY_NABP)); + ev->print_verbose(&tmp_cache, print_event_info); + close_cached_file(&tmp_cache); + } delete ev; } } - + my_free(tmp_str); DBUG_VOID_RETURN; } @@ -4127,7 +4334,7 @@ void Query_log_event::print_query_header(IO_CACHE* file,

void Query_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info) { - Write_on_release_cache cache(&print_event_info->head_cache, file); + Write_on_release_cache cache(&print_event_info->head_cache, file, 0, this);

/** reduce the size of io cache so that the write function is called @@ -4136,8 +4343,24 @@ void Query_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info) DBUG_EXECUTE_IF ("simulate_file_write_error", {(&cache)->write_pos= (&cache)->write_end- 500;}); print_query_header(&cache, print_event_info); - my_b_write(&cache, (uchar*) query, q_len); - my_b_printf(&cache, "\n%s\n", print_event_info->delimiter); + if (!is_flashback) + { + my_b_write(&cache, (uchar*) query, q_len); + my_b_printf(&cache, "\n%s\n", print_event_info->delimiter); + } + else // is_flashback == 1 + { + if (strcmp("BEGIN", query) == 0) + { + my_b_write(&cache, (uchar*) "COMMIT", 6); + my_b_printf(&cache, "\n%s\n", print_event_info->delimiter); + }

Hm, in MariaDB, transactions in the binlog do not start with a Query_log_event "BEGIN" event, they start with a Gtid_log_event. You probably need to handle this to output a COMMIT.

+ else if (strcmp("COMMIT", query) == 0) + { + my_b_write(&cache, (uchar*) "BEGIN", 5); + my_b_printf(&cache, "\n%s\n", print_event_info->delimiter); + } + } } #endif /* MYSQL_CLIENT */

@@ -6885,10 +7108,11 @@ Gtid_log_event::print(FILE *file, PRINT_EVENT_INFO *print_event_info) print_event_info->server_id_printed= true; }

- my_b_printf(&cache, "/*!100001 SET @@session.gtid_seq_no=%s*/%s\n", - buf, print_event_info->delimiter); + if (!is_flashback) + my_b_printf(&cache, "/*!100001 SET @@session.gtid_seq_no=%s*/%s\n", + buf, print_event_info->delimiter); } - if (!(flags2 & FL_STANDALONE)) + if (!(flags2 & FL_STANDALONE) && !is_flashback) my_b_printf(&cache, "BEGIN\n%s\n", print_event_info->delimiter); }

@@ -7531,7 +7755,7 @@ bool Xid_log_event::write() void Xid_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info) { Write_on_release_cache cache(&print_event_info->head_cache, file, - Write_on_release_cache::FLUSH_F); + Write_on_release_cache::FLUSH_F, this);

if (!print_event_info->short_form) { @@ -7541,7 +7765,10 @@ void Xid_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info) print_header(&cache, print_event_info, FALSE); my_b_printf(&cache, "\tXid = %s\n", buf); } - my_b_printf(&cache, "COMMIT%s\n", print_event_info->delimiter); + if (!is_flashback) + my_b_printf(&cache, "COMMIT%s\n", print_event_info->delimiter); + else + my_b_printf(&cache, "BEGIN%s\n", print_event_info->delimiter); } #endif /* MYSQL_CLIENT */

@@ -8185,7 +8412,7 @@ void Unknown_log_event::print(FILE* file_arg, PRINT_EVENT_INFO* print_event_info void Stop_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info) { Write_on_release_cache cache(&print_event_info->head_cache, file, - Write_on_release_cache::FLUSH_F); + Write_on_release_cache::FLUSH_F, this);

if (print_event_info->short_form) return; @@ -9517,6 +9744,7 @@ Rows_log_event::Rows_log_event(const char *buf, uint event_len, m_rows_end= m_rows_buf + data_size; m_rows_cur= m_rows_end; memcpy(m_rows_buf, ptr_rows_data, data_size); + m_rows_before_size= ptr_rows_data - (const uchar *) buf; // Get the size that before SET part } else m_cols.bitmap= 0; // to not free it @@ -10346,6 +10574,7 @@ void Rows_log_event::print_helper(FILE *file, { IO_CACHE *const head= &print_event_info->head_cache; IO_CACHE *const body= &print_event_info->body_cache; + IO_CACHE *const sql= &print_event_info->review_sql_cache; if (!print_event_info->short_form) { bool const last_stmt_event= get_flags(STMT_END_F); @@ -10358,8 +10587,17 @@ void Rows_log_event::print_helper(FILE *file,

if (get_flags(STMT_END_F)) { - copy_event_cache_to_file_and_reinit(head, file); - copy_event_cache_to_file_and_reinit(body, file); + reinit_io_cache(head, READ_CACHE, 0L, FALSE, FALSE); + output_buf.append(head, head->end_of_file); + reinit_io_cache(head, WRITE_CACHE, 0, FALSE, TRUE); + + reinit_io_cache(body, READ_CACHE, 0L, FALSE, FALSE); + output_buf.append(body, body->end_of_file); + reinit_io_cache(body, WRITE_CACHE, 0, FALSE, TRUE); + + reinit_io_cache(sql, READ_CACHE, 0L, FALSE, FALSE); + output_buf.append(sql, sql->end_of_file); + reinit_io_cache(sql, WRITE_CACHE, 0, FALSE, TRUE); } } #endif @@ -12856,6 +13094,7 @@ st_print_event_info::st_print_event_info() myf const flags = MYF(MY_WME | MY_NABP); open_cached_file(&head_cache, NULL, NULL, 0, flags); open_cached_file(&body_cache, NULL, NULL, 0, flags); + open_cached_file(&review_sql_cache, NULL, NULL, 0, flags); } #endif

diff --git a/sql/log_event.h b/sql/log_event.h index bc850c2..c274368 100644 --- a/sql/log_event.h +++ b/sql/log_event.h @@ -41,6 +41,7 @@ #include "rpl_utility.h" #include "hash.h" #include "rpl_tblmap.h" +#include "sql_string.h" #endif

#ifdef MYSQL_SERVER @@ -52,7 +53,9 @@ #include "rpl_gtid.h"

/* Forward declarations */ +#ifndef MYSQL_CLIENT class String; +#endif

Ok, so the #include of sql_string.h was moved into log_event.h from mysqlbinlog.cc. Why was this necessary? Could it be avoided somehow? If not, I think at least a comment is needed here explaining why this #ifndef MYSQL_CLIENT is needed, the whole sharing of code between mysqlbinlog and server is already very confusing.

#define PREFIX_SQL_LOAD "SQL_LOAD-" #define LONG_FIND_ROW_THRESHOLD 60 /* seconds */ @@ -781,9 +784,10 @@ typedef struct st_print_event_info ~st_print_event_info() { close_cached_file(&head_cache); close_cached_file(&body_cache); + close_cached_file(&review_sql_cache); } bool init_ok() /* tells if construction was successful */ - { return my_b_inited(&head_cache) && my_b_inited(&body_cache); } + { return my_b_inited(&head_cache) && my_b_inited(&body_cache) && my_b_inited(&review_sql_cache); }

/* Settings on how to print the events */ @@ -811,6 +815,9 @@ typedef struct st_print_event_info */ IO_CACHE head_cache; IO_CACHE body_cache; + + /* Storing the SQL for reviewing */ + IO_CACHE review_sql_cache; } PRINT_EVENT_INFO; #endif

@@ -1159,6 +1166,41 @@ class Log_event void print_base64(IO_CACHE* file, PRINT_EVENT_INFO* print_event_info, bool is_more); #endif + + /* The following code used for Flashback */ + my_bool is_flashback; + my_bool need_review;

I'm wondering if a better name would be "need_flashback_review". "review" is such a generic term...

+ String output_buf; // Storing the event output + String m_review_dbname; + String m_review_tablename;

Did you consider the performance impact of adding these extra fields to the Log_event class? I am thinking of the overhead for the server (master and slave), which creates quite a lot of events, but does not have anything to do with flashback? Did you consider alternatives, such as putting the new fields somewhere else (maybe struct st_print_event_info), or using #ifdef to add these only for mysqlbinlog, not the server?

+ + void set_review_dbname(const char *name) + { + if (name) + { + m_review_dbname.free(); + m_review_dbname.append(name); + } + } + void set_review_tablename(const char *name) + { + if (name) + { + m_review_tablename.free(); + m_review_tablename.append(name); + } + } + const char *get_review_dbname() const { return m_review_dbname.ptr(); } + const char *get_review_tablename() const { return m_review_tablename.ptr(); } + void free_output_buffer() + { + if (!output_buf.is_empty()) + { + output_buf.free(); + } + } + /* End */ + /* read_log_event() functions read an event from a binlog or relay log; used by SHOW BINLOG EVENTS, the binlog_dump thread on the @@ -1293,7 +1335,13 @@ class Log_event } Log_event(const char* buf, const Format_description_log_event *description_event); - virtual ~Log_event() { free_temp_buf();} + virtual ~Log_event() + { + free_temp_buf(); +#ifdef MYSQL_CLIENT + free_output_buffer(); +#endif + } void register_temp_buf(char* buf, bool must_free) { temp_buf= buf; @@ -4265,12 +4313,14 @@ class Rows_log_event : public Log_event #ifdef MYSQL_CLIENT /* not for direct call, each derived has its own ::print() */ virtual void print(FILE *file, PRINT_EVENT_INFO *print_event_info)= 0; + void exchange_update_rows(PRINT_EVENT_INFO *print_event_info, uchar *rows_buff); // Exchanging the SET/WHERE part in UPDATE event void print_verbose(IO_CACHE *file, PRINT_EVENT_INFO *print_event_info); size_t print_verbose_one_row(IO_CACHE *file, table_def *td, PRINT_EVENT_INFO *print_event_info, MY_BITMAP *cols_bitmap, - const uchar *ptr, const uchar *prefix); + const uchar *ptr, const uchar *prefix, + const my_bool only_parse= 0); // if only_parse=1, then print result is unnecessary #endif

#ifdef MYSQL_SERVER @@ -4407,6 +4457,8 @@ class Rows_log_event : public Log_event uchar *m_rows_cur; /* One-after the end of the data */ uchar *m_rows_end; /* One-after the end of the allocated space */

+ size_t m_rows_before_size; /* The length before m_rows_buf BY P.Linux */ +

Probably don't need the "BY P.Linux" here.

flag_set m_flags; /* Flags for row-level events */

Log_event_type m_type; /* Actual event type */ @@ -4889,6 +4941,23 @@ class Ignorable_log_event : public Log_event { };

+static inline char *copy_event_cache_to_string_and_reinit(IO_CACHE *cache, size_t *bytes_in_cache) +{ + char *buff; + String tmp; + + tmp.length(0); + reinit_io_cache(cache, READ_CACHE, 0L, FALSE, FALSE); + tmp.append(cache, cache->end_of_file); + reinit_io_cache(cache, WRITE_CACHE, 0, FALSE, TRUE); + + buff= (char *) my_malloc(tmp.length() + 1, MYF(0)); + memcpy(buff, tmp.ptr(), tmp.length()); + *bytes_in_cache= tmp.length(); + + return buff; +} + static inline bool copy_event_cache_to_file_and_reinit(IO_CACHE *cache, FILE *file) {

Hope this helps, - Kristian.