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78e381b659
Fixed a bug on unlock_row. In a unlock_row we may unlock only the latest lock granted to this transaction to the row.
36 lines
1013 B
Plaintext
36 lines
1013 B
Plaintext
drop table if exists t1,t2;
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create table t1 (id int not null, f_id int not null, f int not null,
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primary key(f_id, id)) engine=innodb;
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create table t2 (id int not null,s_id int not null,s varchar(200),
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primary key(id)) engine=innodb;
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INSERT INTO t1 VALUES (8, 1, 3);
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INSERT INTO t1 VALUES (1, 2, 1);
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INSERT INTO t2 VALUES (1, 0, '');
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INSERT INTO t2 VALUES (8, 1, '');
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commit;
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DELETE ml.* FROM t1 AS ml LEFT JOIN t2 AS mm ON (mm.id=ml.id)
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WHERE mm.id IS NULL;
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select ml.* from t1 as ml left join t2 as mm on (mm.id=ml.id)
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where mm.id is null lock in share mode;
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id f_id f
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drop table t1,t2;
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create table t1(a int not null, b int, primary key(a)) engine=innodb;
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insert into t1 values(1,1),(2,2),(3,1),(4,2),(5,1),(6,2);
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commit;
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set autocommit = 0;
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select * from t1 lock in share mode;
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a b
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1 1
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2 2
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3 1
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4 2
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5 1
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6 2
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update t1 set b = 5 where b = 1;
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set autocommit = 0;
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select * from t1 where a = 2 and b = 2 for update;
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ERROR HY000: Lock wait timeout exceeded; try restarting transaction
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commit;
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commit;
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drop table t1;
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