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52 lines
1 KiB
Text
52 lines
1 KiB
Text
# Let's see if FLUSH TABLES WITH READ LOCK blocks COMMIT of existing
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# transactions.
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# We verify that we did not introduce a deadlock.
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-- source include/have_innodb.inc
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connect (con1,localhost,root,,);
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connect (con2,localhost,root,,);
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connect (con3,localhost,root,,);
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connection con1;
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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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create table t1 (a int) engine=innodb;
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# blocks COMMIT ?
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begin;
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insert into t1 values(1);
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connection con2;
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flush tables with read lock;
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select * from t1;
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connection con1;
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send commit; # blocked by con2
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sleep 1;
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connection con2;
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select * from t1; # verify con1 was blocked and data did not move
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unlock tables;
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connection con1;
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reap;
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# No deadlock ?
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connection con1;
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begin;
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select * from t1 for update;
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connection con2;
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begin;
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send select * from t1 for update; # blocked by con1
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sleep 1;
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connection con3;
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send flush tables with read lock; # blocked by con2
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connection con1;
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commit; # should not be blocked by con3
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connection con2;
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reap;
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connection con3;
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reap;
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unlock tables;
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connection con1;
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drop table t1;
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