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9e9ca8b6eb
Replaced COND_refresh with COND_global_read_lock becasue of a bug in NTPL threads when using different mutexes as arguments to pthread_cond_wait() The original code caused a hang in FLUSH TABLES WITH READ LOCK in some circumstances because pthread_cond_broadcast() was not delivered to other threads. This fixes: Bug#16986: Deadlock condition with MyISAM tables Bug#20048: FLUSH TABLES WITH READ LOCK causes a deadlock
58 lines
1.6 KiB
Plaintext
58 lines
1.6 KiB
Plaintext
drop table if exists t1,t2;
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drop database if exists mysqltest;
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create temporary table t1(n int not null primary key);
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create table t2(n int);
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insert into t2 values(3);
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select * from t1;
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n
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3
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flush tables with read lock;
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drop table t2;
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ERROR HY000: Can't execute the query because you have a conflicting read lock
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drop table t2;
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unlock tables;
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create database mysqltest;
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create table mysqltest.t1(n int);
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insert into mysqltest.t1 values (23);
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flush tables with read lock;
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drop database mysqltest;
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select * from mysqltest.t1;
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n
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23
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unlock tables;
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create table t1 (n int);
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flush tables with read lock;
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insert into t1 values (345);
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select * from t1;
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n
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345
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drop table t1;
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create table t1 (c1 int);
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lock table t1 write;
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flush tables with read lock;
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ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
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lock table t1 read;
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flush tables with read lock;
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lock table t1 write;
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ERROR HY000: Can't execute the query because you have a conflicting read lock
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lock table t1 read;
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lock table t1 write;
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ERROR HY000: Can't execute the query because you have a conflicting read lock
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unlock tables;
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create table t2 (c1 int);
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create table t3 (c1 int);
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lock table t1 read, t2 read, t3 write;
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flush tables with read lock;
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ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
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lock table t1 read, t2 read, t3 read;
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flush tables with read lock;
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unlock tables;
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drop table t1, t2, t3;
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create table t1 (c1 int);
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create table t2 (c1 int);
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lock table t1 write;
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flush tables with read lock;
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insert into t2 values(1);
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unlock tables;
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drop table t1, t2;
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