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truncate_coverage.test
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# # Code coverage testing of TRUNCATE TABLE. # # Ingo Struewing, 2009-07-20 # --source include/have_debug_sync.inc SET DEBUG_SYNC='RESET'; --let $MYSQLD_DATADIR= `SELECT @@datadir` --disable_warnings DROP TABLE IF EXISTS t1; --enable_warnings --echo # --echo # Bug#20667 - Truncate table fails for a write locked table --echo # ######## # Attack wait_while_table_is_used(). Kill query while trying to # upgrade MDL. # CREATE TABLE t1 (c1 INT); INSERT INTO t1 VALUES (1); # # Acquire a shared metadata lock on table by opening HANDLER for it and wait. # TRUNCATE shall block on this metadata lock. # We can't use normal DML as such statements would also block LOCK TABLES. # --echo # --echo # connection con1 --connect (con1, localhost, root,,) HANDLER t1 OPEN; # # Get connection id of default connection. # Lock the table and start TRUNCATE, which will block on MDL upgrade. # --echo # --echo # connection default --connection default let $ID= `SELECT @id := CONNECTION_ID()`; LOCK TABLE t1 WRITE; SET DEBUG_SYNC='mdl_upgrade_lock SIGNAL waiting'; send TRUNCATE TABLE t1; # # Get the default connection ID into a variable in an invisible statement. # Kill the TRUNCATE query. This shall result in an error return # from wait_while_table_is_used(). # --echo # --echo # connection con2 --connect (con2, localhost, root,,) SET DEBUG_SYNC='now WAIT_FOR waiting'; let $invisible_assignment_in_select = `SELECT @id := $ID`; KILL QUERY @id; --disconnect con2 --echo # --echo # connection default --connection default --error ER_QUERY_INTERRUPTED reap; UNLOCK TABLES; --echo # --echo # connection con1 --connection con1 --echo # Release shared metadata lock by closing HANDLER. HANDLER t1 CLOSE; --disconnect con1 --echo # --echo # connection default --connection default DROP TABLE t1; SET DEBUG_SYNC='RESET'; ######## # Attack reopen_tables(). Remove form file. # CREATE TABLE t1 (c1 INT); INSERT INTO t1 VALUES (1); # # Acquire a shared metadata lock on table by opening HANDLER for it and wait. # TRUNCATE shall block on this metadata lock. # We can't use normal DML as such statements would also block LOCK TABLES. # --echo # --echo # connection con1 --connect (con1, localhost, root,,) HANDLER t1 OPEN; # # Lock the table and start TRUNCATE, which will block on MDL upgrade. # --echo # --echo # connection default --connection default LOCK TABLE t1 WRITE; SET DEBUG_SYNC='mdl_upgrade_lock SIGNAL waiting'; send TRUNCATE TABLE t1; # # Remove datafile. # Commit to let TRUNCATE continue. # --echo # --echo # connection con2 --connect (con2, localhost, root,,) SET DEBUG_SYNC='now WAIT_FOR waiting'; --remove_file $MYSQLD_DATADIR/test/t1.frm --disconnect con2 --echo # --echo # connection con1 --connection con1 HANDLER t1 CLOSE; --disconnect con1 --echo # --echo # connection default --connection default --error ER_NO_SUCH_TABLE reap; UNLOCK TABLES; --error ER_BAD_TABLE_ERROR DROP TABLE t1; SET DEBUG_SYNC='RESET'; ######## # Attack acquire_exclusive_locks(). Hold a global read lock. # Non-LOCK TABLE case. # CREATE TABLE t1 (c1 INT); INSERT INTO t1 VALUES (1); # # Start a transaction and execute a DML in it. Since 5.4.4 this leaves # a shared meta data lock (MDL) behind. TRUNCATE shall block on it. # --echo # --echo # connection con1 --connect (con1, localhost, root,,) START TRANSACTION; INSERT INTO t1 VALUES (2); # # Get connection id of default connection. # Start TRUNCATE, which will block on acquire_exclusive_locks(). # --echo # --echo # connection default --connection default let $ID= `SELECT @id := CONNECTION_ID()`; SET DEBUG_SYNC='mdl_acquire_lock_wait SIGNAL waiting'; send TRUNCATE TABLE t1; # # Get the default connection ID into a variable in an invisible statement. # Kill the TRUNCATE query. This shall result in an error return # from wait_while_table_is_used(). # --echo # --echo # connection con1 --connection con1 SET DEBUG_SYNC='now WAIT_FOR waiting'; let $invisible_assignment_in_select = `SELECT @id := $ID`; KILL QUERY @id; --echo # --echo # connection default --connection default --error ER_QUERY_INTERRUPTED reap; --echo # --echo # connection con1 --connection con1 --echo # Release SW lock by committing transaction. COMMIT; --disconnect con1 --echo # --echo # connection default --connection default UNLOCK TABLES; DROP TABLE t1; SET DEBUG_SYNC='RESET'; --echo # --echo # Bug#57659 Segfault in Query_cache::invalidate_data for TRUNCATE TABLE --echo # --echo # Note that this test case only reproduces the problem --echo # when it is run with valgrind. --disable_warnings DROP TABLE IF EXISTS t1, m1; --enable_warnings CREATE TABLE t1(a INT) engine=memory; CREATE TABLE m1(a INT) engine=merge UNION(t1); connect(con2, localhost, root); --echo # Connection con1 connect(con1, localhost, root); SET DEBUG_SYNC= 'open_tables_after_open_and_process_table SIGNAL opened WAIT_FOR dropped'; --echo # Sending: --send TRUNCATE TABLE m1 --echo # Connection con2 connection con2; SET DEBUG_SYNC= 'now WAIT_FOR opened'; --echo # Sending: --send FLUSH TABLES --echo # Connection default connection default; --echo # Waiting for FLUSH TABLES to be blocked. let $wait_condition= SELECT COUNT(*)=1 FROM information_schema.processlist WHERE state= 'Waiting for table flush' AND info= 'FLUSH TABLES'; --source include/wait_condition.inc SET DEBUG_SYNC= 'now SIGNAL dropped'; --echo # Connection con1 connection con1; --echo # Reaping: TRUNCATE TABLE m1 --error ER_WRONG_MRG_TABLE --reap disconnect con1; --source include/wait_until_disconnected.inc --echo # Connection con2 connection con2; --echo # Reaping: FLUSH TABLES --reap disconnect con2; --source include/wait_until_disconnected.inc --echo # Connection default connection default; SET DEBUG_SYNC= 'RESET'; DROP TABLE m1, t1;