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103 lines
1.7 KiB
Plaintext
103 lines
1.7 KiB
Plaintext
-- source include/have_innodb.inc
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#
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# Check and select innodb lock type
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#
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set global innodb_table_locks=1;
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select @@innodb_table_locks;
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#
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# Testing of explicit table locks with enforced table locks
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#
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connect (con1,localhost,root,,);
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connect (con2,localhost,root,,);
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--disable_warnings
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drop table if exists t1;
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--enable_warnings
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#
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# Testing of explicit table locks with enforced table locks
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#
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set @@innodb_table_locks=1;
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connection con1;
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create table t1 (id integer, x integer) engine=INNODB;
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insert into t1 values(0, 0);
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set autocommit=0;
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SELECT * from t1 where id = 0 FOR UPDATE;
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connection con2;
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set autocommit=0;
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# The following statement should hang because con1 is locking the page
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--send
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lock table t1 write;
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--sleep 2
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connection con1;
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update t1 set x=1 where id = 0;
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select * from t1;
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commit;
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connection con2;
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reap;
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update t1 set x=2 where id = 0;
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commit;
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unlock tables;
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connection con1;
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select * from t1;
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commit;
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drop table t1;
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#
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# Try with old lock method (where LOCK TABLE is ignored by InnoDB)
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#
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set @@innodb_table_locks=0;
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create table t1 (id integer primary key, x integer) engine=INNODB;
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insert into t1 values(0, 0),(1,1),(2,2);
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commit;
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SELECT * from t1 where id = 0 FOR UPDATE;
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connection con2;
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set autocommit=0;
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set @@innodb_table_locks=0;
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# The following statement should work becase innodb doesn't check table locks
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lock table t1 write;
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connection con1;
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# This will be locked by MySQL
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--send
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update t1 set x=10 where id = 2;
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--sleep 2
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connection con2;
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# Note that we will get a deadlock if we try to select any rows marked
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# for update by con1 !
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SELECT * from t1 where id = 2;
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UPDATE t1 set x=3 where id = 2;
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commit;
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SELECT * from t1;
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commit;
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unlock tables;
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connection con1;
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reap;
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commit;
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select * from t1;
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drop table t1;
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# End of 4.1 tests
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