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https://github.com/MariaDB/server.git
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36 lines
983 B
Plaintext
36 lines
983 B
Plaintext
stop slave;
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drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
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reset master;
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reset slave;
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drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
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start slave;
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create table t1(n int);
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insert into t1 values(get_lock("lock",2));
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select get_lock("lock",2);
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get_lock("lock",2)
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1
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select release_lock("lock");
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release_lock("lock")
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1
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select get_lock("lock",3);
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get_lock("lock",3)
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1
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select * from t1;
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n
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1
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select is_free_lock("lock"), is_used_lock("lock") = connection_id();
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is_free_lock("lock") is_used_lock("lock") = connection_id()
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0 1
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explain extended select is_free_lock("lock"), is_used_lock("lock");
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 select is_free_lock(_latin1'lock') AS `is_free_lock("lock")`,is_used_lock(_latin1'lock') AS `is_used_lock("lock")`
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select is_free_lock("lock2");
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is_free_lock("lock2")
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1
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select is_free_lock(NULL);
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is_free_lock(NULL)
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NULL
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drop table t1;
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