初版

build/lib/mysql/mysql-test/t/flush_block_commit.test

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+# Let's see if FLUSH TABLES WITH READ LOCK blocks COMMIT of existing
+# transactions.
+# We verify that we did not introduce a deadlock.
+# This is intended to mimick how mysqldump and innobackup work.
+
+# And it requires InnoDB
+--source include/have_innodb.inc
+
+# Save the initial number of concurrent sessions
+--source include/count_sessions.inc
+
+--echo # Establish connection con1 (user=root)
+connect (con1,localhost,root,,);
+--echo # Establish connection con2 (user=root)
+connect (con2,localhost,root,,);
+--echo # Establish connection con3 (user=root)
+connect (con3,localhost,root,,);
+--echo # Switch to connection con1
+connection con1;
+
+--disable_warnings
+DROP TABLE IF EXISTS t1;
+--enable_warnings
+CREATE TABLE t1 (a INT) ENGINE=innodb;
+
+# blocks COMMIT ?
+
+BEGIN;
+INSERT INTO t1 VALUES(1);
+--echo # Switch to connection con2
+connection con2;
+FLUSH TABLES WITH READ LOCK;
+SELECT * FROM t1;
+--echo # Switch to connection con1
+connection con1;
+send COMMIT; # blocked by con2
+sleep 1;
+--echo # Switch to connection con2
+connection con2;
+SELECT * FROM t1; # verify con1 was blocked and data did not move
+UNLOCK TABLES;
+--echo # Switch to connection con1
+connection con1;
+reap;
+
+# No deadlock ?
+
+--echo # Switch to connection con1
+connection con1;
+BEGIN;
+SELECT * FROM t1 FOR UPDATE;
+--echo # Switch to connection con2
+connection con2;
+BEGIN;
+send SELECT * FROM t1 FOR UPDATE; # blocked by con1
+sleep 1;
+--echo # Switch to connection con3
+connection con3;
+send FLUSH TABLES WITH READ LOCK; # blocked by con2
+--echo # Switch to connection con1
+connection con1;
+COMMIT; # should not be blocked by con3
+--echo # Switch to connection con2
+connection con2;
+reap;
+--echo # Switch to connection con3
+connection con3;
+reap;
+UNLOCK TABLES;
+
+# Bug#6732 FLUSH TABLES WITH READ LOCK + COMMIT hangs later FLUSH TABLES
+#          WITH READ LOCK
+
+--echo # Switch to connection con2
+connection con2;
+COMMIT; # unlock InnoDB row locks to allow insertions
+--echo # Switch to connection con1
+connection con1;
+BEGIN;
+INSERT INTO t1 VALUES(10);
+FLUSH TABLES WITH READ LOCK;
+COMMIT;
+UNLOCK TABLES;
+--echo # Switch to connection con2
+connection con2;
+FLUSH TABLES WITH READ LOCK; # bug caused hang here
+UNLOCK TABLES;
+
+# Bug#7358 SHOW CREATE DATABASE fails if open transaction
+
+BEGIN;
+SELECT * FROM t1;
+SHOW CREATE DATABASE test;
+
+DROP TABLE t1;
+
+
+# Cleanup
+--echo # Switch to connection default and close connections con1, con2, con3
+connection default;
+disconnect con1;
+disconnect con2;
+disconnect con3;
+
+# End of 4.1 tests
+
+# Wait till all disconnects are completed
+--source include/wait_until_count_sessions.inc
+