789 lines
32 KiB
Plaintext
789 lines
32 KiB
Plaintext
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SET GLOBAL TRANSACTION ISOLATION LEVEL REPEATABLE READ;
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SELECT @@global.tx_isolation;
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@@global.tx_isolation
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REPEATABLE-READ
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SELECT @@global.innodb_locks_unsafe_for_binlog;
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@@global.innodb_locks_unsafe_for_binlog
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1
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# keep_locks == 0
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GRANT USAGE ON test.* TO mysqltest@localhost;
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drop table if exists t1;
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**
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** two UPDATE's running and both changing distinct result sets
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**
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** connection thread1
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** Set up table
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SET SESSION STORAGE_ENGINE = InnoDB;
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create table t1(eta int(11) not null, tipo int(11), c varchar(255));
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insert into t1 values (7,7, "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa");
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insert into t1 values (8,8, "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb");
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insert into t1 values (10,1,"ccccccccccccccccccccccccccccccccccccccccccc");
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insert into t1 values (20,2,"ddddddddddddddddddddddddddddddddddddddddddd");
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insert into t1 values (30,1,"eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee");
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insert into t1 values (40,2,"fffffffffffffffffffffffffffffffffffffffffff");
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insert into t1 values (50,1,"ggggggggggggggggggggggggggggggggggggggggggg");
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insert into t1 values (60,2,"hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh");
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insert into t1 values (70,1,"iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii");
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insert into t1 values (80,22,"jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj");
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insert into t1 values (90,11,"kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk");
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** Get user level lock (ULL) for thread 1
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select get_lock("hello",10);
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get_lock("hello",10)
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1
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** connection thread2
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** Start transaction for thread 2
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begin;
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** Update will cause a table scan and a new ULL will
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** be created and blocked on the first row where tipo=11.
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update t1 set eta=1+get_lock("hello",10)*0 where tipo=11;
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** connection thread1
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** Start new transaction for thread 1
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begin;
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** Update on t1 will cause a table scan which will be blocked because
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** the previously initiated table scan applied exclusive key locks on
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** all primary keys.
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** Not so if innodb_locks_unsafe_for_binlog is set. The locks that
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** do not match the WHERE condition are released.
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update t1 set eta=2 where tipo=22;
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** Release user level name lock from thread 1. This will cause the ULL
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** on thread 2 to end its wait.
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DO release_lock("hello");
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** Table is now updated with a new eta on tipo=22 for thread 1.
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select * from t1;
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eta tipo c
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7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
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10 1 ccccccccccccccccccccccccccccccccccccccccccc
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20 2 ddddddddddddddddddddddddddddddddddddddddddd
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30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
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40 2 fffffffffffffffffffffffffffffffffffffffffff
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50 1 ggggggggggggggggggggggggggggggggggggggggggg
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60 2 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
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70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
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2 22 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
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90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
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** connection thread2
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** Release the lock and collect result from update on thread 2
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DO release_lock("hello");
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** Table should have eta updates where tipo=11 but updates made by
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** thread 1 shouldn't be visible yet.
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select * from t1;
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eta tipo c
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7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
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10 1 ccccccccccccccccccccccccccccccccccccccccccc
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20 2 ddddddddddddddddddddddddddddddddddddddddddd
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30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
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40 2 fffffffffffffffffffffffffffffffffffffffffff
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50 1 ggggggggggggggggggggggggggggggggggggggggggg
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60 2 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
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70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
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80 22 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
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1 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
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** Sending commit on thread 2.
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commit;
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** connection thread1
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** Make sure table reads didn't change yet on thread 1.
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select * from t1;
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eta tipo c
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7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
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10 1 ccccccccccccccccccccccccccccccccccccccccccc
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20 2 ddddddddddddddddddddddddddddddddddddddddddd
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30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
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40 2 fffffffffffffffffffffffffffffffffffffffffff
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50 1 ggggggggggggggggggggggggggggggggggggggggggg
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60 2 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
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70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
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2 22 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
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90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
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** And send final commit on thread 1.
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commit;
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** Table should now be updated by both updates in the order of
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** thread 1,2.
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select * from t1;
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eta tipo c
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7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
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10 1 ccccccccccccccccccccccccccccccccccccccccccc
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20 2 ddddddddddddddddddddddddddddddddddddddddddd
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30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
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40 2 fffffffffffffffffffffffffffffffffffffffffff
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50 1 ggggggggggggggggggggggggggggggggggggggggggg
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60 2 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
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70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
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2 22 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
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1 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
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** connection thread2
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** Make sure the output is similar for t1.
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select * from t1;
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eta tipo c
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7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
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10 1 ccccccccccccccccccccccccccccccccccccccccccc
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20 2 ddddddddddddddddddddddddddddddddddddddddddd
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30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
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40 2 fffffffffffffffffffffffffffffffffffffffffff
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50 1 ggggggggggggggggggggggggggggggggggggggggggg
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60 2 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
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70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
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2 22 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
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1 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
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** connection thread1
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select * from t1;
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eta tipo c
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7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
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10 1 ccccccccccccccccccccccccccccccccccccccccccc
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20 2 ddddddddddddddddddddddddddddddddddddddddddd
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30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
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40 2 fffffffffffffffffffffffffffffffffffffffffff
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50 1 ggggggggggggggggggggggggggggggggggggggggggg
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60 2 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
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70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
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2 22 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
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1 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
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** connection default
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drop table t1;
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**
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** two UPDATE's running and one changing result set
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**
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** connection thread1
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** Set up table
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SET SESSION STORAGE_ENGINE = InnoDB;
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create table t1(eta int(11) not null, tipo int(11), c varchar(255));
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insert into t1 values (7,7, "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa");
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insert into t1 values (8,8, "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb");
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insert into t1 values (10,1,"ccccccccccccccccccccccccccccccccccccccccccc");
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insert into t1 values (20,2,"ddddddddddddddddddddddddddddddddddddddddddd");
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insert into t1 values (30,1,"eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee");
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insert into t1 values (40,2,"fffffffffffffffffffffffffffffffffffffffffff");
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insert into t1 values (50,1,"ggggggggggggggggggggggggggggggggggggggggggg");
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insert into t1 values (60,2,"hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh");
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insert into t1 values (70,1,"iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii");
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insert into t1 values (80,22,"jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj");
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insert into t1 values (90,11,"kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk");
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** Get ULL "hello" on thread 1
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select get_lock("hello",10);
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get_lock("hello",10)
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1
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** connection thread2
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** Start transaction on thread 2
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begin;
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** Update will cause a table scan.
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** This will cause a hang on the first row where tipo=1 until the
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** blocking ULL is released.
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update t1 set eta=1+get_lock("hello",10)*0 where tipo=1;
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** connection thread1
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** Start transaction on thread 1
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begin;
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** Update on t1 will cause a table scan which will be blocked because
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|
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** the previously initiated table scan applied exclusive key locks on
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** all primary keys.
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** Not so if innodb_locks_unsafe_for_binlog is set. The locks that
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** do not match the WHERE condition are released.
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update t1 set tipo=1 where tipo=2;
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** Release ULL. This will release the next waiting ULL on thread 2.
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DO release_lock("hello");
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** The table should still be updated with updates for thread 1 only:
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select * from t1;
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eta tipo c
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7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
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10 1 ccccccccccccccccccccccccccccccccccccccccccc
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20 1 ddddddddddddddddddddddddddddddddddddddddddd
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30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
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40 1 fffffffffffffffffffffffffffffffffffffffffff
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50 1 ggggggggggggggggggggggggggggggggggggggggggg
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60 1 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
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70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
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80 22 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
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90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
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** connection thread2
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** Release the lock and collect result from thread 2:
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DO release_lock("hello");
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** Seen from thread 2 the table should have been updated on four
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** places.
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select * from t1;
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eta tipo c
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7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
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1 1 ccccccccccccccccccccccccccccccccccccccccccc
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20 2 ddddddddddddddddddddddddddddddddddddddddddd
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1 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
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40 2 fffffffffffffffffffffffffffffffffffffffffff
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1 1 ggggggggggggggggggggggggggggggggggggggggggg
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60 2 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
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1 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
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80 22 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
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90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
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commit;
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** connection thread1
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** Thread 2 has committed but the result should remain the same for
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** thread 1 (updated on three places):
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select * from t1;
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eta tipo c
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7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
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10 1 ccccccccccccccccccccccccccccccccccccccccccc
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20 1 ddddddddddddddddddddddddddddddddddddddddddd
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30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
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40 1 fffffffffffffffffffffffffffffffffffffffffff
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50 1 ggggggggggggggggggggggggggggggggggggggggggg
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60 1 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
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70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
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80 22 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
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90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
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commit;
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** After a commit the table should be merged with the previous
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** commit.
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** This select should show both updates:
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select * from t1;
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eta tipo c
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7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
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1 1 ccccccccccccccccccccccccccccccccccccccccccc
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20 1 ddddddddddddddddddddddddddddddddddddddddddd
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1 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
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40 1 fffffffffffffffffffffffffffffffffffffffffff
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1 1 ggggggggggggggggggggggggggggggggggggggggggg
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60 1 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
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1 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
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80 22 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
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90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
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** connection thread2
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select * from t1;
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eta tipo c
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7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
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1 1 ccccccccccccccccccccccccccccccccccccccccccc
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20 1 ddddddddddddddddddddddddddddddddddddddddddd
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1 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
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40 1 fffffffffffffffffffffffffffffffffffffffffff
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1 1 ggggggggggggggggggggggggggggggggggggggggggg
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60 1 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
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1 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
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80 22 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
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90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
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** connection thread1
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select * from t1;
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eta tipo c
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7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
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1 1 ccccccccccccccccccccccccccccccccccccccccccc
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20 1 ddddddddddddddddddddddddddddddddddddddddddd
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1 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
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40 1 fffffffffffffffffffffffffffffffffffffffffff
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1 1 ggggggggggggggggggggggggggggggggggggggggggg
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60 1 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
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1 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
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80 22 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
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90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
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** connection default
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drop table t1;
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**
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** One UPDATE and one INSERT .... Monty's test
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||
|
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**
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** connection thread1
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** Set up table
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||
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|
SET SESSION STORAGE_ENGINE = InnoDB;
|
||
|
|
create table t1 (a int not null, b int not null);
|
||
|
|
insert into t1 values (1,1),(2,1),(3,1),(4,1);
|
||
|
|
** Create ULL 'hello2'
|
||
|
|
select get_lock("hello2",10);
|
||
|
|
get_lock("hello2",10)
|
||
|
|
1
|
||
|
|
** connection thread2
|
||
|
|
** Begin a new transaction on thread 2
|
||
|
|
begin;
|
||
|
|
** Update will create a table scan which creates a ULL where a=2;
|
||
|
|
** this will hang waiting on thread 1.
|
||
|
|
update t1 set b=10+get_lock(concat("hello",a),10)*0 where a=2;
|
||
|
|
** connection thread1
|
||
|
|
** Insert new values to t1 from thread 1; this created an implicit
|
||
|
|
** commit since there are no on-going transactions.
|
||
|
|
insert into t1 values (1,1);
|
||
|
|
** Release the ULL (thread 2 updates will finish).
|
||
|
|
DO release_lock("hello2");
|
||
|
|
** ..but thread 1 will still see t1 as if nothing has happend:
|
||
|
|
select * from t1;
|
||
|
|
a b
|
||
|
|
1 1
|
||
|
|
2 1
|
||
|
|
3 1
|
||
|
|
4 1
|
||
|
|
1 1
|
||
|
|
** connection thread2
|
||
|
|
** Collect results from thread 2 and release the lock.
|
||
|
|
DO release_lock("hello2");
|
||
|
|
** The table should look like the original+updates for thread 2,
|
||
|
|
** and consist of new rows:
|
||
|
|
select * from t1;
|
||
|
|
a b
|
||
|
|
1 1
|
||
|
|
2 10
|
||
|
|
3 1
|
||
|
|
4 1
|
||
|
|
1 1
|
||
|
|
** Commit changes from thread 2
|
||
|
|
commit;
|
||
|
|
** connection default
|
||
|
|
drop table t1;
|
||
|
|
|
||
|
|
**
|
||
|
|
** one UPDATE changing result set and SELECT ... FOR UPDATE
|
||
|
|
**
|
||
|
|
** connection thread1
|
||
|
|
** Set up table
|
||
|
|
SET SESSION STORAGE_ENGINE = InnoDB;
|
||
|
|
create table t1(eta int(11) not null, tipo int(11), c varchar(255));
|
||
|
|
insert into t1 values (7,7, "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa");
|
||
|
|
insert into t1 values (8,8, "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb");
|
||
|
|
insert into t1 values (10,1,"ccccccccccccccccccccccccccccccccccccccccccc");
|
||
|
|
insert into t1 values (20,2,"ddddddddddddddddddddddddddddddddddddddddddd");
|
||
|
|
insert into t1 values (30,1,"eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee");
|
||
|
|
insert into t1 values (40,2,"fffffffffffffffffffffffffffffffffffffffffff");
|
||
|
|
insert into t1 values (50,1,"ggggggggggggggggggggggggggggggggggggggggggg");
|
||
|
|
insert into t1 values (60,2,"hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh");
|
||
|
|
insert into t1 values (70,1,"iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii");
|
||
|
|
insert into t1 values (80,22,"jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj");
|
||
|
|
insert into t1 values (90,11,"kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk");
|
||
|
|
** connection thread2
|
||
|
|
** Begin a new transaction on thread 2
|
||
|
|
begin;
|
||
|
|
** Select a range for update.
|
||
|
|
select * from t1 where tipo=2 FOR UPDATE;
|
||
|
|
eta tipo c
|
||
|
|
20 2 ddddddddddddddddddddddddddddddddddddddddddd
|
||
|
|
40 2 fffffffffffffffffffffffffffffffffffffffffff
|
||
|
|
60 2 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
|
||
|
|
** connection thread1
|
||
|
|
** Begin a new transaction on thread 1
|
||
|
|
begin;
|
||
|
|
** Update the same range which is marked for update on thread 2; this
|
||
|
|
** will hang because of row locks.
|
||
|
|
update t1 set tipo=1 where tipo=2;
|
||
|
|
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
|
||
|
|
** After the update the table will be unmodified because the previous
|
||
|
|
** transaction failed and was rolled back.
|
||
|
|
select * from t1;
|
||
|
|
eta tipo c
|
||
|
|
7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
|
||
|
|
8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
|
||
|
|
10 1 ccccccccccccccccccccccccccccccccccccccccccc
|
||
|
|
20 2 ddddddddddddddddddddddddddddddddddddddddddd
|
||
|
|
30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
|
||
|
|
40 2 fffffffffffffffffffffffffffffffffffffffffff
|
||
|
|
50 1 ggggggggggggggggggggggggggggggggggggggggggg
|
||
|
|
60 2 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
|
||
|
|
70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
|
||
|
|
80 22 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
|
||
|
|
90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
|
||
|
|
** connection thread2
|
||
|
|
** The table should look unmodified from thread 2.
|
||
|
|
select * from t1;
|
||
|
|
eta tipo c
|
||
|
|
7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
|
||
|
|
8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
|
||
|
|
10 1 ccccccccccccccccccccccccccccccccccccccccccc
|
||
|
|
20 2 ddddddddddddddddddddddddddddddddddddddddddd
|
||
|
|
30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
|
||
|
|
40 2 fffffffffffffffffffffffffffffffffffffffffff
|
||
|
|
50 1 ggggggggggggggggggggggggggggggggggggggggggg
|
||
|
|
60 2 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
|
||
|
|
70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
|
||
|
|
80 22 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
|
||
|
|
90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
|
||
|
|
** Sending a commit should release the row locks and enable
|
||
|
|
** thread 1 to complete the transaction.
|
||
|
|
commit;
|
||
|
|
** connection thread1
|
||
|
|
** Commit on thread 1.
|
||
|
|
commit;
|
||
|
|
** connection thread2
|
||
|
|
** The table should not have been changed.
|
||
|
|
select * from t1;
|
||
|
|
eta tipo c
|
||
|
|
7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
|
||
|
|
8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
|
||
|
|
10 1 ccccccccccccccccccccccccccccccccccccccccccc
|
||
|
|
20 2 ddddddddddddddddddddddddddddddddddddddddddd
|
||
|
|
30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
|
||
|
|
40 2 fffffffffffffffffffffffffffffffffffffffffff
|
||
|
|
50 1 ggggggggggggggggggggggggggggggggggggggggggg
|
||
|
|
60 2 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
|
||
|
|
70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
|
||
|
|
80 22 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
|
||
|
|
90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
|
||
|
|
** connection thread1
|
||
|
|
** Even on thread 1:
|
||
|
|
select * from t1;
|
||
|
|
eta tipo c
|
||
|
|
7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
|
||
|
|
8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
|
||
|
|
10 1 ccccccccccccccccccccccccccccccccccccccccccc
|
||
|
|
20 2 ddddddddddddddddddddddddddddddddddddddddddd
|
||
|
|
30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
|
||
|
|
40 2 fffffffffffffffffffffffffffffffffffffffffff
|
||
|
|
50 1 ggggggggggggggggggggggggggggggggggggggggggg
|
||
|
|
60 2 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
|
||
|
|
70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
|
||
|
|
80 22 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
|
||
|
|
90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
|
||
|
|
** connection default
|
||
|
|
drop table t1;
|
||
|
|
|
||
|
|
**
|
||
|
|
** one UPDATE not changing result set and SELECT ... FOR UPDATE
|
||
|
|
**
|
||
|
|
** connection thread1
|
||
|
|
** Set up table
|
||
|
|
SET SESSION STORAGE_ENGINE = InnoDB;
|
||
|
|
create table t1(eta int(11) not null, tipo int(11), c varchar(255));
|
||
|
|
insert into t1 values (7,7, "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa");
|
||
|
|
insert into t1 values (8,8, "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb");
|
||
|
|
insert into t1 values (10,1,"ccccccccccccccccccccccccccccccccccccccccccc");
|
||
|
|
insert into t1 values (20,2,"ddddddddddddddddddddddddddddddddddddddddddd");
|
||
|
|
insert into t1 values (30,1,"eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee");
|
||
|
|
insert into t1 values (40,2,"fffffffffffffffffffffffffffffffffffffffffff");
|
||
|
|
insert into t1 values (50,1,"ggggggggggggggggggggggggggggggggggggggggggg");
|
||
|
|
insert into t1 values (60,2,"hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh");
|
||
|
|
insert into t1 values (70,1,"iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii");
|
||
|
|
insert into t1 values (80,22,"jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj");
|
||
|
|
insert into t1 values (90,11,"kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk");
|
||
|
|
** connection thread2
|
||
|
|
** Starting new transaction on thread 2.
|
||
|
|
begin;
|
||
|
|
** Starting SELECT .. FOR UPDATE
|
||
|
|
select * from t1 where tipo=2 FOR UPDATE;
|
||
|
|
eta tipo c
|
||
|
|
20 2 ddddddddddddddddddddddddddddddddddddddddddd
|
||
|
|
40 2 fffffffffffffffffffffffffffffffffffffffffff
|
||
|
|
60 2 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
|
||
|
|
** connection thread1
|
||
|
|
|
||
|
|
** Starting new transaction on thread 1
|
||
|
|
begin;
|
||
|
|
** Updating single row using a table scan. This will time out
|
||
|
|
** because of ongoing transaction on thread 1 holding lock on
|
||
|
|
** all primary keys in the scan.
|
||
|
|
** Not so if innodb_locks_unsafe_for_binlog is set. The locks that
|
||
|
|
** do not match the WHERE condition are released.
|
||
|
|
update t1 set tipo=11 where tipo=22;
|
||
|
|
** After the time out the transaction is aborted; no rows should
|
||
|
|
** have changed.
|
||
|
|
select * from t1;
|
||
|
|
eta tipo c
|
||
|
|
7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
|
||
|
|
8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
|
||
|
|
10 1 ccccccccccccccccccccccccccccccccccccccccccc
|
||
|
|
20 2 ddddddddddddddddddddddddddddddddddddddddddd
|
||
|
|
30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
|
||
|
|
40 2 fffffffffffffffffffffffffffffffffffffffffff
|
||
|
|
50 1 ggggggggggggggggggggggggggggggggggggggggggg
|
||
|
|
60 2 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
|
||
|
|
70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
|
||
|
|
80 11 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
|
||
|
|
90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
|
||
|
|
** connection thread2
|
||
|
|
** The same thing should hold true for the transaction on
|
||
|
|
** thread 2
|
||
|
|
select * from t1;
|
||
|
|
eta tipo c
|
||
|
|
7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
|
||
|
|
8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
|
||
|
|
10 1 ccccccccccccccccccccccccccccccccccccccccccc
|
||
|
|
20 2 ddddddddddddddddddddddddddddddddddddddddddd
|
||
|
|
30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
|
||
|
|
40 2 fffffffffffffffffffffffffffffffffffffffffff
|
||
|
|
50 1 ggggggggggggggggggggggggggggggggggggggggggg
|
||
|
|
60 2 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
|
||
|
|
70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
|
||
|
|
80 22 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
|
||
|
|
90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
|
||
|
|
commit;
|
||
|
|
** connection thread1
|
||
|
|
commit;
|
||
|
|
** connection thread2
|
||
|
|
** Even after committing:
|
||
|
|
select * from t1;
|
||
|
|
eta tipo c
|
||
|
|
7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
|
||
|
|
8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
|
||
|
|
10 1 ccccccccccccccccccccccccccccccccccccccccccc
|
||
|
|
20 2 ddddddddddddddddddddddddddddddddddddddddddd
|
||
|
|
30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
|
||
|
|
40 2 fffffffffffffffffffffffffffffffffffffffffff
|
||
|
|
50 1 ggggggggggggggggggggggggggggggggggggggggggg
|
||
|
|
60 2 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
|
||
|
|
70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
|
||
|
|
80 11 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
|
||
|
|
90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
|
||
|
|
** connection thread1
|
||
|
|
select * from t1;
|
||
|
|
eta tipo c
|
||
|
|
7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
|
||
|
|
8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
|
||
|
|
10 1 ccccccccccccccccccccccccccccccccccccccccccc
|
||
|
|
20 2 ddddddddddddddddddddddddddddddddddddddddddd
|
||
|
|
30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
|
||
|
|
40 2 fffffffffffffffffffffffffffffffffffffffffff
|
||
|
|
50 1 ggggggggggggggggggggggggggggggggggggggggggg
|
||
|
|
60 2 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
|
||
|
|
70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
|
||
|
|
80 11 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
|
||
|
|
90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
|
||
|
|
** connection default
|
||
|
|
drop table t1;
|
||
|
|
|
||
|
|
**
|
||
|
|
** two SELECT ... FOR UPDATE
|
||
|
|
**
|
||
|
|
** connection thread1
|
||
|
|
** Set up table
|
||
|
|
SET SESSION STORAGE_ENGINE = InnoDB;
|
||
|
|
create table t1(eta int(11) not null, tipo int(11), c varchar(255));
|
||
|
|
insert into t1 values (7,7, "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa");
|
||
|
|
insert into t1 values (8,8, "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb");
|
||
|
|
insert into t1 values (10,1,"ccccccccccccccccccccccccccccccccccccccccccc");
|
||
|
|
insert into t1 values (20,2,"ddddddddddddddddddddddddddddddddddddddddddd");
|
||
|
|
insert into t1 values (30,1,"eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee");
|
||
|
|
insert into t1 values (40,2,"fffffffffffffffffffffffffffffffffffffffffff");
|
||
|
|
insert into t1 values (50,1,"ggggggggggggggggggggggggggggggggggggggggggg");
|
||
|
|
insert into t1 values (60,2,"hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh");
|
||
|
|
insert into t1 values (70,1,"iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii");
|
||
|
|
insert into t1 values (80,22,"jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj");
|
||
|
|
insert into t1 values (90,11,"kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk");
|
||
|
|
** connection thread2
|
||
|
|
** Begin a new transaction on thread 2
|
||
|
|
begin;
|
||
|
|
select * from t1 where tipo=2 FOR UPDATE;
|
||
|
|
eta tipo c
|
||
|
|
20 2 ddddddddddddddddddddddddddddddddddddddddddd
|
||
|
|
40 2 fffffffffffffffffffffffffffffffffffffffffff
|
||
|
|
60 2 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
|
||
|
|
** connection thread1
|
||
|
|
** Begin a new transaction on thread 1
|
||
|
|
begin;
|
||
|
|
** Selecting a range for update by table scan will be blocked
|
||
|
|
** because of on-going transaction on thread 2.
|
||
|
|
select * from t1 where tipo=1 FOR UPDATE;
|
||
|
|
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
|
||
|
|
** connection thread2
|
||
|
|
** Table will be unchanged and the select command will not be
|
||
|
|
** blocked:
|
||
|
|
select * from t1;
|
||
|
|
eta tipo c
|
||
|
|
7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
|
||
|
|
8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
|
||
|
|
10 1 ccccccccccccccccccccccccccccccccccccccccccc
|
||
|
|
20 2 ddddddddddddddddddddddddddddddddddddddddddd
|
||
|
|
30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
|
||
|
|
40 2 fffffffffffffffffffffffffffffffffffffffffff
|
||
|
|
50 1 ggggggggggggggggggggggggggggggggggggggggggg
|
||
|
|
60 2 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
|
||
|
|
70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
|
||
|
|
80 22 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
|
||
|
|
90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
|
||
|
|
** Commit transacton on thread 2.
|
||
|
|
commit;
|
||
|
|
** connection thread1
|
||
|
|
** Commit transaction on thread 1.
|
||
|
|
commit;
|
||
|
|
** connection thread2
|
||
|
|
** Make sure table isn't blocked on thread 2:
|
||
|
|
select * from t1;
|
||
|
|
eta tipo c
|
||
|
|
7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
|
||
|
|
8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
|
||
|
|
10 1 ccccccccccccccccccccccccccccccccccccccccccc
|
||
|
|
20 2 ddddddddddddddddddddddddddddddddddddddddddd
|
||
|
|
30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
|
||
|
|
40 2 fffffffffffffffffffffffffffffffffffffffffff
|
||
|
|
50 1 ggggggggggggggggggggggggggggggggggggggggggg
|
||
|
|
60 2 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
|
||
|
|
70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
|
||
|
|
80 22 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
|
||
|
|
90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
|
||
|
|
** connection thread1
|
||
|
|
** Make sure table isn't blocked on thread 1:
|
||
|
|
select * from t1;
|
||
|
|
eta tipo c
|
||
|
|
7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
|
||
|
|
8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
|
||
|
|
10 1 ccccccccccccccccccccccccccccccccccccccccccc
|
||
|
|
20 2 ddddddddddddddddddddddddddddddddddddddddddd
|
||
|
|
30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
|
||
|
|
40 2 fffffffffffffffffffffffffffffffffffffffffff
|
||
|
|
50 1 ggggggggggggggggggggggggggggggggggggggggggg
|
||
|
|
60 2 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
|
||
|
|
70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
|
||
|
|
80 22 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
|
||
|
|
90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
|
||
|
|
** connection default
|
||
|
|
drop table t1;
|
||
|
|
|
||
|
|
**
|
||
|
|
** one UPDATE changing result set and DELETE
|
||
|
|
**
|
||
|
|
** connection thread1
|
||
|
|
** Set up table
|
||
|
|
SET SESSION STORAGE_ENGINE = InnoDB;
|
||
|
|
create table t1(eta int(11) not null, tipo int(11), c varchar(255));
|
||
|
|
insert into t1 values (7,7, "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa");
|
||
|
|
insert into t1 values (8,8, "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb");
|
||
|
|
insert into t1 values (10,1,"ccccccccccccccccccccccccccccccccccccccccccc");
|
||
|
|
insert into t1 values (20,2,"ddddddddddddddddddddddddddddddddddddddddddd");
|
||
|
|
insert into t1 values (30,1,"eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee");
|
||
|
|
insert into t1 values (40,2,"fffffffffffffffffffffffffffffffffffffffffff");
|
||
|
|
insert into t1 values (50,1,"ggggggggggggggggggggggggggggggggggggggggggg");
|
||
|
|
insert into t1 values (60,2,"hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh");
|
||
|
|
insert into t1 values (70,1,"iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii");
|
||
|
|
insert into t1 values (80,22,"jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj");
|
||
|
|
insert into t1 values (90,11,"kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk");
|
||
|
|
** connection thread2
|
||
|
|
begin;
|
||
|
|
delete from t1 where tipo=2;
|
||
|
|
** connection thread1
|
||
|
|
begin;
|
||
|
|
update t1 set tipo=1 where tipo=2;
|
||
|
|
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
|
||
|
|
select * from t1;
|
||
|
|
eta tipo c
|
||
|
|
7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
|
||
|
|
8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
|
||
|
|
10 1 ccccccccccccccccccccccccccccccccccccccccccc
|
||
|
|
20 2 ddddddddddddddddddddddddddddddddddddddddddd
|
||
|
|
30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
|
||
|
|
40 2 fffffffffffffffffffffffffffffffffffffffffff
|
||
|
|
50 1 ggggggggggggggggggggggggggggggggggggggggggg
|
||
|
|
60 2 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
|
||
|
|
70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
|
||
|
|
80 22 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
|
||
|
|
90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
|
||
|
|
** connection thread2
|
||
|
|
select * from t1;
|
||
|
|
eta tipo c
|
||
|
|
7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
|
||
|
|
8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
|
||
|
|
10 1 ccccccccccccccccccccccccccccccccccccccccccc
|
||
|
|
30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
|
||
|
|
50 1 ggggggggggggggggggggggggggggggggggggggggggg
|
||
|
|
70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
|
||
|
|
80 22 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
|
||
|
|
90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
|
||
|
|
commit;
|
||
|
|
** connection thread1
|
||
|
|
commit;
|
||
|
|
** connection thread2
|
||
|
|
select * from t1;
|
||
|
|
eta tipo c
|
||
|
|
7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
|
||
|
|
8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
|
||
|
|
10 1 ccccccccccccccccccccccccccccccccccccccccccc
|
||
|
|
30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
|
||
|
|
50 1 ggggggggggggggggggggggggggggggggggggggggggg
|
||
|
|
70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
|
||
|
|
80 22 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
|
||
|
|
90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
|
||
|
|
** connection thread1
|
||
|
|
select * from t1;
|
||
|
|
eta tipo c
|
||
|
|
7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
|
||
|
|
8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
|
||
|
|
10 1 ccccccccccccccccccccccccccccccccccccccccccc
|
||
|
|
30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
|
||
|
|
50 1 ggggggggggggggggggggggggggggggggggggggggggg
|
||
|
|
70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
|
||
|
|
80 22 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
|
||
|
|
90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
|
||
|
|
** connection default
|
||
|
|
drop table t1;
|
||
|
|
|
||
|
|
**
|
||
|
|
** one UPDATE not changing result set and DELETE
|
||
|
|
**
|
||
|
|
** connection thread1
|
||
|
|
** Set up table
|
||
|
|
SET SESSION STORAGE_ENGINE = InnoDB;
|
||
|
|
create table t1(eta int(11) not null, tipo int(11), c varchar(255));
|
||
|
|
insert into t1 values (7,7, "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa");
|
||
|
|
insert into t1 values (8,8, "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb");
|
||
|
|
insert into t1 values (10,1,"ccccccccccccccccccccccccccccccccccccccccccc");
|
||
|
|
insert into t1 values (20,2,"ddddddddddddddddddddddddddddddddddddddddddd");
|
||
|
|
insert into t1 values (30,1,"eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee");
|
||
|
|
insert into t1 values (40,2,"fffffffffffffffffffffffffffffffffffffffffff");
|
||
|
|
insert into t1 values (50,1,"ggggggggggggggggggggggggggggggggggggggggggg");
|
||
|
|
insert into t1 values (60,2,"hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh");
|
||
|
|
insert into t1 values (70,1,"iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii");
|
||
|
|
insert into t1 values (80,22,"jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj");
|
||
|
|
insert into t1 values (90,11,"kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk");
|
||
|
|
** connection thread2
|
||
|
|
begin;
|
||
|
|
delete from t1 where tipo=2;
|
||
|
|
** connection thread1
|
||
|
|
begin;
|
||
|
|
** Update on t1 will cause a table scan which will be blocked because
|
||
|
|
** the previously initiated table scan applied exclusive key locks on
|
||
|
|
** all primary keys.
|
||
|
|
** Not so if innodb_locks_unsafe_for_binlog is set. The locks that
|
||
|
|
** do not match the WHERE condition are released.
|
||
|
|
update t1 set tipo=1 where tipo=22;
|
||
|
|
select * from t1;
|
||
|
|
eta tipo c
|
||
|
|
7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
|
||
|
|
8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
|
||
|
|
10 1 ccccccccccccccccccccccccccccccccccccccccccc
|
||
|
|
20 2 ddddddddddddddddddddddddddddddddddddddddddd
|
||
|
|
30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
|
||
|
|
40 2 fffffffffffffffffffffffffffffffffffffffffff
|
||
|
|
50 1 ggggggggggggggggggggggggggggggggggggggggggg
|
||
|
|
60 2 hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
|
||
|
|
70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
|
||
|
|
80 1 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
|
||
|
|
90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
|
||
|
|
** connection thread2
|
||
|
|
select * from t1;
|
||
|
|
eta tipo c
|
||
|
|
7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
|
||
|
|
8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
|
||
|
|
10 1 ccccccccccccccccccccccccccccccccccccccccccc
|
||
|
|
30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
|
||
|
|
50 1 ggggggggggggggggggggggggggggggggggggggggggg
|
||
|
|
70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
|
||
|
|
80 22 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
|
||
|
|
90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
|
||
|
|
commit;
|
||
|
|
** connection thread1
|
||
|
|
commit;
|
||
|
|
** connection thread2
|
||
|
|
select * from t1;
|
||
|
|
eta tipo c
|
||
|
|
7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
|
||
|
|
8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
|
||
|
|
10 1 ccccccccccccccccccccccccccccccccccccccccccc
|
||
|
|
30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
|
||
|
|
50 1 ggggggggggggggggggggggggggggggggggggggggggg
|
||
|
|
70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
|
||
|
|
80 1 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
|
||
|
|
90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
|
||
|
|
** connection thread1
|
||
|
|
select * from t1;
|
||
|
|
eta tipo c
|
||
|
|
7 7 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
|
||
|
|
8 8 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
|
||
|
|
10 1 ccccccccccccccccccccccccccccccccccccccccccc
|
||
|
|
30 1 eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
|
||
|
|
50 1 ggggggggggggggggggggggggggggggggggggggggggg
|
||
|
|
70 1 iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
|
||
|
|
80 1 jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
|
||
|
|
90 11 kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
|
||
|
|
** Cleanup
|
||
|
|
** connection thread2
|
||
|
|
** connection default
|
||
|
|
drop table t1;
|
||
|
|
drop user mysqltest@localhost;
|