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Problem: Statements that write to tables with auto_increment columns
based on the selection from another table, may lead to master
and slave going out of sync, as the order in which the rows
are retrieved from the table may differ on master and slave.
Solution: We mark writing to a table with auto_increment table
based on the rows selected from another table as unsafe. This
will cause the execution of such statements to throw a warning
and forces the statement to be logged in ROW if the logging
format is mixed.
Changes:
1. All the statements that writes to a table with auto_increment
column(s) based on the rows fetched from another table, will now
be unsafe.
2. CREATE TABLE with SELECT will now be unsafe.
sql/share/errmsg-utf8.txt:
Added new warning messages.
sql/sql_base.cc:
-Created function to check statements that write to
tables with auto_increment column and has select.
-Marked all the statements that write to a table
with auto_increment column based on rows fetched
from other table(s) as unsafe.
sql/sql_table.cc:
mark CREATE TABLE[with auto_increment column] as unsafe.
74 lines
1.6 KiB
Text
74 lines
1.6 KiB
Text
include/master-slave.inc
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[connection master]
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call mtr.add_suppression("Unsafe statement written to the binary log using statement format since BINLOG_FORMAT = STATEMENT.");
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create table t1(a int auto_increment, primary key(a));
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create table t2(b int auto_increment, c int, primary key(b));
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insert into t1 values (1),(2),(3);
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insert into t1 values (null);
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insert into t2 values (null,last_insert_id());
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select * from t1 ORDER BY a;
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a
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1
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2
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3
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4
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select * from t2 ORDER BY b;
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b c
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1 4
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drop table t1;
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drop table t2;
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create table t1(a int auto_increment, key(a)) engine=innodb;
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create table t2(b int auto_increment, c int, key(b), foreign key(b) references t1(a)) engine=innodb;
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SET FOREIGN_KEY_CHECKS=0;
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insert into t1 values (10);
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insert into t1 values (null),(null),(null);
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insert into t2 values (5,0);
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insert into t2 values (null,last_insert_id());
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SET FOREIGN_KEY_CHECKS=1;
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select * from t1;
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a
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10
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11
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12
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13
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select * from t2;
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b c
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5 0
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6 11
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drop table t2;
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drop table t1;
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create table t1(a int auto_increment, primary key(a));
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create table t2(b int auto_increment, c int, primary key(b));
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insert into t1 values (10);
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insert into t1 values (null),(null),(null);
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insert into t2 values (5,0);
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insert into t2 (c) select * from t1 ORDER BY a;
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select * from t2 ORDER BY b;
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b c
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5 0
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6 10
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7 11
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8 12
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9 13
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select * from t1 ORDER BY a;
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a
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10
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11
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12
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13
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select * from t2 ORDER BY b;
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b c
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5 0
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6 10
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7 11
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8 12
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9 13
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drop table t1;
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drop table t2;
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SET TIMESTAMP=1000000000;
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CREATE TABLE t1 ( a INT UNIQUE );
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SET FOREIGN_KEY_CHECKS=0;
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INSERT INTO t1 VALUES (1),(1);
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Got one of the listed errors
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drop table t1;
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include/rpl_end.inc
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