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SET tx_isolation = 'READ-COMMITTED'; Warnings: Warning 1287 '@@tx_isolation' is deprecated and will be removed in a future release. Please use '@@transaction_isolation' instead CREATE TABLE bug49164 (a INT, b BIGINT, c TINYINT, PRIMARY KEY (a, b)) ENGINE=InnoDB; insert into bug49164 values (1,1,1), (2,2,2), (3,3,3); begin; update bug49164 set c=7; select * from bug49164; a b c 1 1 7 2 2 7 3 3 7 rollback; select * from bug49164; a b c 1 1 1 2 2 2 3 3 3 begin; update bug49164 set c=7; SET tx_isolation = 'READ-COMMITTED'; Warnings: Warning 1287 '@@tx_isolation' is deprecated and will be removed in a future release. Please use '@@transaction_isolation' instead begin; select * from bug49164; a b c 1 1 1 2 2 2 3 3 3 commit; begin; update bug49164 set c=6 where a=1 and b=1; rollback; select * from bug49164; a b c 1 1 1 2 2 2 3 3 3 commit; select * from bug49164; a b c 1 1 6 2 2 2 3 3 3 drop table bug49164;