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188 lines
6.5 KiB
188 lines
6.5 KiB
Tests of synchronization of stored procedure execution.
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SET DEBUG_SYNC= 'RESET';
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#
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# Bug #30977 Concurrent statement using stored function and
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# DROP FUNCTION breaks SBR
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#
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# A stored routine could change after dispatch_command()
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# but before a MDL lock is taken. This must be noticed and the
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# sp cache flushed so the correct version can be loaded.
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#
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# Connection default
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CREATE FUNCTION f1() RETURNS INT RETURN 1;
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# Get f1 cached
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SELECT f1();
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f1()
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1
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# Then start executing it again...
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SET DEBUG_SYNC= 'before_execute_sql_command SIGNAL before WAIT_FOR changed';
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# Sending:
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SELECT f1();
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# Connection 2
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SET DEBUG_SYNC= 'now WAIT_FOR before';
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# ... but before f1 is locked, change it.
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DROP FUNCTION f1;
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CREATE FUNCTION f1() RETURNS INT RETURN 2;
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SET DEBUG_SYNC= 'now SIGNAL changed';
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# Connection default
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# We should now get '2' and not '1'.
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# Reaping: SELECT f1()
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f1()
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2
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DROP FUNCTION f1;
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SET DEBUG_SYNC= 'RESET';
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#
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# Field translation items must be cleared in case of back-offs
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# for queries that use Information Schema tables. Otherwise
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# memory allocated in fix_fields() for views may end up referring
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# to freed memory.
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#
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DROP FUNCTION IF EXISTS f1;
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# Connection default
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CREATE FUNCTION f1() RETURNS INT RETURN 0;
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# Connection con2
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SET DEBUG_SYNC= 'after_wait_locked_pname SIGNAL locked WAIT_FOR issued';
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# con2 will now have an x-lock on f1
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# Sending:
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ALTER FUNCTION f1 COMMENT 'comment';
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# Connection default
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SET DEBUG_SYNC= 'now WAIT_FOR locked';
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# This query will block due to the x-lock on f1 and back-off
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SHOW OPEN TABLES WHERE f1()=0;
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# Connection con3
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# Check that the IS query is blocked before releasing the x-lock
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SET DEBUG_SYNC= 'now SIGNAL issued';
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# Connection default
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# Reaping: ALTER FUNCTION f1 COMMENT 'comment'
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DROP FUNCTION f1;
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SET DEBUG_SYNC= 'RESET';
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#
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# Bug #48246 assert in close_thread_table
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#
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CREATE TABLE t0 (b INTEGER);
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CREATE TABLE t1 (a INTEGER);
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CREATE FUNCTION f1(b INTEGER) RETURNS INTEGER RETURN 1;
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CREATE PROCEDURE p1() SELECT COUNT(f1(a)) FROM t1, t0;
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INSERT INTO t0 VALUES(1);
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INSERT INTO t1 VALUES(1), (2);
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# Connection 2
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CALL p1();
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COUNT(f1(a))
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2
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SET DEBUG_SYNC= 'after_open_table_mdl_shared SIGNAL locked_t1 WAIT_FOR go_for_t0';
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# This call used to cause an assertion. MDL deadlock with upcoming
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# LOCK TABLES statement will cause back-off and retry.
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# A variable indicating if a prelocking list exists, used to be not
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# reset properly causing an eventual assert.
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# Sending:
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CALL p1();
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# Connection default
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SET DEBUG_SYNC= 'now WAIT_FOR locked_t1';
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# Issue LOCK TABLES statement which will enter in MDL deadlock
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# with CALL statement and as result will cause it to perform
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# back-off and retry.
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SET DEBUG_SYNC= 'mdl_acquire_lock_wait SIGNAL go_for_t0';
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LOCK TABLES t0 WRITE, t1 WRITE;
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UNLOCK TABLES;
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# Connection 2
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# Reaping: CALL p1()
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COUNT(f1(a))
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2
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# Connection default
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DROP PROCEDURE p1;
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DROP FUNCTION f1;
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DROP TABLES t0, t1;
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# Case 1: Test case to verify MDL locking from concurrent SELECT and
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# DROP FUNCTION operation with case & access insensitive routine
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# name.
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CREATE FUNCTION mIxEdCaSe() RETURNS INT RETURN 1;
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SET DEBUG_SYNC='after_shared_lock_pname SIGNAL locked WAIT_FOR continue';
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SELECT mIxEdCaSé();
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# At this point we have a shared lock on 'mIxEdCaSé'
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CONNECT con1, localhost, root;
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SET DEBUG_SYNC='now WAIT_FOR locked';
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DROP FUNCTION mixedcase;;
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# Without fix the shared lock does not prevent us from dropping the SF
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# since the case used in this statement is different. This statement
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# takes exclusive metadata lock on 'mixedcase', not 'mIxEdCaSe'.
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# Drop function mIxEdCaSe will be blocked properly.
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CONNECT con2, localhost, root;
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SET DEBUG_SYNC='now SIGNAL continue';
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connection default;
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mIxEdCaSé()
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1
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connection con1;
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# Case 2: Test case to verify MDL locking from concurrent SHOW FUNCTION
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# and DROP FUNCTION operation with case and accent insensitive
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# function name.
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connection default;
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CREATE FUNCTION mIxEdCaSe() RETURNS INT RETURN 1;
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SET DEBUG_SYNC='after_acquiring_mdl_lock_on_routine SIGNAL locked WAIT_FOR continue';
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DROP FUNCTION mIxEdCaSé;;
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# At this point we have a exclusive lock on 'mIxEdCaSé'
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connection con1;
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SET DEBUG_SYNC='now WAIT_FOR locked';
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SHOW CREATE FUNCTION MiXéDcAsE;
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# This statement request for shared lock and it is blocked till DROP
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# statement releases lock.
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connection con2;
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SET DEBUG_SYNC='now SIGNAL continue';
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connection default;
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connection con1;
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ERROR 42000: FUNCTION MiXéDcAsE does not exist
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# Case 3: Test case to verify MDL locking from concurrent DDL operations
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# with case and accent insensitive function name.
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connection default;
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CREATE FUNCTION mIxEdCaSe() RETURNS INT RETURN 1;
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SET DEBUG_SYNC='after_acquiring_mdl_lock_on_routine SIGNAL locked WAIT_FOR continue';
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DROP FUNCTION miXEDCAsé;
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# At this point we have a exclusive lock on 'miXEDCAsé'
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connection con1;
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SET DEBUG_SYNC='now WAIT_FOR locked';
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ALTER FUNCTION mixedcase COMMENT "comment_string";;
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# This statement request for exclusive lock and it is blocked till DROP
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# statement releases lock.
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connection con2;
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SET DEBUG_SYNC='now SIGNAL continue';
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connection default;
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connection con1;
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ERROR 42000: FUNCTION test.mixedcase does not exist
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# Case 4: Test case to verify MDL locking from concurrent SHOW PROCEDURE
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# and DROP PROCEDURE operation with case and accent insensitive
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# procedure name.
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connection default;
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CREATE PROCEDURE mIxEdCaSe() BEGIN END;
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SET DEBUG_SYNC='after_acquiring_mdl_lock_on_routine SIGNAL locked WAIT_FOR continue';
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DROP PROCEDURE mIxEdCaSé;;
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# At this point we have a exclusive lock on 'mIxEdCaSé'
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connection con1;
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SET DEBUG_SYNC='now WAIT_FOR locked';
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SHOW CREATE PROCEDURE MiXéDcAsE;
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# This statement request for shared lock and it is blocked till DROP
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# statement releases lock.
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connection con2;
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SET DEBUG_SYNC='now SIGNAL continue';
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connection default;
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connection con1;
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ERROR 42000: PROCEDURE MiXéDcAsE does not exist
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# Case 5: Test case to verify MDL locking from concurrent DDL operations
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# with case & accent insensitive procedure name.
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connection default;
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CREATE PROCEDURE mIxEdCaSe() BEGIN END;
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SET DEBUG_SYNC='after_acquiring_mdl_lock_on_routine SIGNAL locked WAIT_FOR continue';
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DROP PROCEDURE miXEDCAsé;
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# At this point we have a exclusive lock on 'miXEDCAsé'
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connection con1;
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SET DEBUG_SYNC='now WAIT_FOR locked';
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ALTER PROCEDURE mixedcase COMMENT "comment_string";;
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# This statement request for exclusive lock and it is blocked till DROP
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# statement releases lock.
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connection con2;
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SET DEBUG_SYNC='now SIGNAL continue';
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connection default;
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connection con1;
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ERROR 42000: PROCEDURE test.mixedcase does not exist
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connection default;
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SET DEBUG_SYNC='RESET';
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disconnect con1;
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disconnect con2;
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