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1
by brian
clean slate |
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CREATE TABLE t1 (a INT PRIMARY KEY, b INT) ENGINE=INNODB;
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INSERT INTO t1 VALUES (1,1),(2,2),(3,3),(4,4),(5,5),(6,6);
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SET BINLOG_FORMAT=STATEMENT;
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BEGIN;
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SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
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ERROR HY000: Transaction isolation level 'READ-COMMITTED' is not safe for 'STATEMENT' binlog mode
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UPDATE t1 SET b = a*a WHERE a > 1;
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COMMIT;
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BEGIN;
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SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
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UPDATE t1 SET b = a*a WHERE a > 1;
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COMMIT;
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BEGIN;
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SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE;
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UPDATE t1 SET b = a*a WHERE a > 1;
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COMMIT;
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SET BINLOG_FORMAT=MIXED;
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BEGIN;
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SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
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ERROR HY000: Transaction isolation level 'READ-COMMITTED' is not safe for 'MIXED' binlog mode
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UPDATE t1 SET b = a*a*a WHERE a > 2;
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COMMIT;
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SET BINLOG_FORMAT=ROW;
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BEGIN;
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SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
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UPDATE t1 SET b = a*a*a*a WHERE a > 3;
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COMMIT;
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SELECT @@session.tx_isolation, @@session.binlog_format;
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@@session.tx_isolation READ-COMMITTED
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@@session.binlog_format ROW
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BEGIN;
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SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
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SET BINLOG_FORMAT=MIXED;
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ERROR HY000: Transaction isolation level 'READ-COMMITTED' prevents leaving 'ROW' binlog mode
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UPDATE t1 SET b = a*a*a*a WHERE a > 3;
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COMMIT;
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SELECT @@session.tx_isolation, @@session.binlog_format;
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@@session.tx_isolation READ-COMMITTED
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@@session.binlog_format ROW
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BEGIN;
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SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
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SET BINLOG_FORMAT=STATEMENT;
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ERROR HY000: Transaction isolation level 'READ-COMMITTED' prevents leaving 'ROW' binlog mode
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UPDATE t1 SET b = a*a*a*a WHERE a > 3;
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COMMIT;
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SELECT @@session.tx_isolation, @@session.binlog_format;
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@@session.tx_isolation READ-COMMITTED
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@@session.binlog_format ROW
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