^^&&^^

Edit File: truncate_coverage.result

SET DEBUG_SYNC='RESET';
DROP TABLE IF EXISTS t1;
#
# Bug#20667 - Truncate table fails for a write locked table
#
CREATE TABLE t1 (c1 INT);
INSERT INTO t1 VALUES (1);
#
# connection con1
HANDLER t1 OPEN;
#
# connection default
LOCK TABLE t1 WRITE;
SET DEBUG_SYNC='mdl_upgrade_lock SIGNAL waiting';
TRUNCATE TABLE t1;
#
# connection con2
SET DEBUG_SYNC='now WAIT_FOR waiting';
KILL QUERY @id;
#
# connection default
ERROR 70100: Query execution was interrupted
UNLOCK TABLES;
#
# connection con1
# Release shared metadata lock by closing HANDLER.
HANDLER t1 CLOSE;
#
# connection default
DROP TABLE t1;
SET DEBUG_SYNC='RESET';
CREATE TABLE t1 (c1 INT);
INSERT INTO t1 VALUES (1);
#
# connection con1
HANDLER t1 OPEN;
#
# connection default
LOCK TABLE t1 WRITE;
SET DEBUG_SYNC='mdl_upgrade_lock SIGNAL waiting';
TRUNCATE TABLE t1;
#
# connection con2
SET DEBUG_SYNC='now WAIT_FOR waiting';
#
# connection con1
HANDLER t1 CLOSE;
#
# connection default
ERROR 42S02: Table 'test.t1' doesn't exist
UNLOCK TABLES;
DROP TABLE t1;
ERROR 42S02: Unknown table 'test.t1'
SET DEBUG_SYNC='RESET';
CREATE TABLE t1 (c1 INT);
INSERT INTO t1 VALUES (1);
#
# connection con1
START TRANSACTION;
INSERT INTO t1 VALUES (2);
#
# connection default
SET DEBUG_SYNC='mdl_acquire_lock_wait SIGNAL waiting';
TRUNCATE TABLE t1;
#
# connection con1
SET DEBUG_SYNC='now WAIT_FOR waiting';
KILL QUERY @id;
#
# connection default
ERROR 70100: Query execution was interrupted
#
# connection con1
# Release SW lock by committing transaction.
COMMIT;
#
# connection default
UNLOCK TABLES;
DROP TABLE t1;
SET DEBUG_SYNC='RESET';
#
# Bug#57659 Segfault in Query_cache::invalidate_data for TRUNCATE TABLE
#
# Note that this test case only reproduces the problem
# when it is run with valgrind.
DROP TABLE IF EXISTS t1, m1;
CREATE TABLE t1(a INT) engine=memory;
CREATE TABLE m1(a INT) engine=merge UNION(t1);
# Connection con1
SET DEBUG_SYNC= 'open_tables_after_open_and_process_table SIGNAL opened WAIT_FOR dropped';
# Sending:
TRUNCATE TABLE m1;
# Connection con2
SET DEBUG_SYNC= 'now WAIT_FOR opened';
# Sending:
FLUSH TABLES;
# Connection default
# Waiting for FLUSH TABLES to be blocked.
SET DEBUG_SYNC= 'now SIGNAL dropped';
# Connection con1
# Reaping: TRUNCATE TABLE m1
ERROR HY000: Unable to open underlying table which is differently defined or of non-MyISAM type or doesn't exist
# Connection con2
# Reaping: FLUSH TABLES
# Connection default
SET DEBUG_SYNC= 'RESET';
DROP TABLE m1, t1;