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MDEV-21810 MBR: Unexpected "Unsafe statement" warning for unsafe IODKU
MDEV-17614 fixes to replication unsafety for INSERT ON DUP KEY UPDATE
on two or more unique key table left a flaw. The fixes checked the
safety condition per each inserted record with the idea to catch a user-created
value to an autoincrement column and when that succeeds the autoincrement column
would become the source of unsafety too.
It was not expected that after a duplicate error the next record's
write_set may become different and the unsafe decision for that
specific record will be computed to screw the Query's binlogging
state and when @@binlog_format is MIXED nothing gets bin-logged.
This case has been already fixed in 10.5.2 by 91ab42a823 that
relocated/optimized THD::decide_logging_format_low() out of the record insert
loop. The safety decision is computed once and at the right time.
Pertinent parts of the commit are cherry-picked.
Also a spurious warning about unsafety is removed when MIXED
@@binlog_format; original MDEV-17614 test result corrected.
The original test of MDEV-17614 is extended and made more readable.
32 lines
1 KiB
Text
32 lines
1 KiB
Text
include/master-slave.inc
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[connection master]
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CREATE TABLE t1 (id INT PRIMARY KEY AUTO_INCREMENT, a INT, b INT, c INT,
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UNIQUE (a), UNIQUE (b)) ENGINE=innodb;
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INSERT INTO t1 (`a`,`c`) VALUES (1,1), (2,1) ON DUPLICATE KEY UPDATE c = 1;
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# UNSAFE
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INSERT INTO t1 (`a`,`c`) VALUES (3, 1),(2,1), (1,1) ON DUPLICATE KEY UPDATE c = a * 10 + VALUES(c);
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SELECT * from t1;
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id a b c
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1 1 NULL 11
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2 2 NULL 21
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3 3 NULL 1
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connection slave;
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include/diff_tables.inc [master:t1,slave:t1]
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connection master;
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CREATE OR REPLACE TABLE t1 (a INT, b INT, c INT, UNIQUE (a), UNIQUE (b)) ENGINE=innodb;
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INSERT INTO t1 VALUES (1,10,1);
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# eligable for the statement format run unsafe warning
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INSERT INTO t1 VALUES (2,20,2) ON DUPLICATE KEY UPDATE c = 100;
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# not eligable: no warning in the statement format run
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INSERT INTO t1 (`a`,`c`) VALUES (3, 1) ON DUPLICATE KEY UPDATE c = 99;
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SELECT * from t1;
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a b c
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1 10 1
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2 20 2
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3 NULL 1
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connection slave;
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include/diff_tables.inc [master:t1,slave:t1]
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connection master;
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DROP TABLE t1;
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connection slave;
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include/rpl_end.inc
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