Commit c37250dd authored by Magne Mahre's avatar Magne Mahre

merge

parents 9e6cb377 a6733b52
......@@ -310,4 +310,16 @@ a b
2 2
drop table t1;
set global low_priority_updates = @old_delayed_updates;
#
# Bug #47682 strange behaviour of INSERT DELAYED
#
DROP TABLE IF EXISTS t1, t2;
CREATE TABLE t1 (f1 integer);
CREATE TABLE t2 (f1 integer);
FLUSH TABLES WITH READ LOCK;
LOCK TABLES t1 READ;
INSERT DELAYED INTO t2 VALUES (1);
ERROR HY000: Can't execute the query because you have a conflicting read lock
UNLOCK TABLES;
DROP TABLE t1, t2;
End of 5.1 tests
......@@ -328,4 +328,26 @@ drop table t1;
set global low_priority_updates = @old_delayed_updates;
--echo #
--echo # Bug #47682 strange behaviour of INSERT DELAYED
--echo #
--disable_warnings
DROP TABLE IF EXISTS t1, t2;
--enable_warnings
CREATE TABLE t1 (f1 integer);
CREATE TABLE t2 (f1 integer);
FLUSH TABLES WITH READ LOCK;
LOCK TABLES t1 READ;
--error ER_CANT_UPDATE_WITH_READLOCK
INSERT DELAYED INTO t2 VALUES (1);
UNLOCK TABLES;
DROP TABLE t1, t2;
--echo End of 5.1 tests
......@@ -500,6 +500,22 @@ bool open_and_lock_for_insert_delayed(THD *thd, TABLE_LIST *table_list)
DBUG_ENTER("open_and_lock_for_insert_delayed");
#ifndef EMBEDDED_LIBRARY
if (thd->locked_tables && thd->global_read_lock)
{
/*
If this connection has the global read lock, the handler thread
will not be able to lock the table. It will wait for the global
read lock to go away, but this will never happen since the
connection thread will be stuck waiting for the handler thread
to open and lock the table.
If we are not in locked tables mode, INSERT will seek protection
against the global read lock (and fail), thus we will only get
to this point in locked tables mode.
*/
my_error(ER_CANT_UPDATE_WITH_READLOCK, MYF(0));
DBUG_RETURN(TRUE);
}
if (delayed_get_table(thd, table_list))
DBUG_RETURN(TRUE);
......
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