call mtr.add_suppression("Sort aborted.*"); set @save_debug_dbug= @@debug_dbug; set statement debug_dbug="d,something" for select @@debug_dbug; @@debug_dbug d,something set @@debug_dbug= @save_debug_dbug; CREATE TABLE t1(f0 int auto_increment primary key, f1 int); INSERT INTO t1(f1) VALUES (0),(1),(2),(3),(4),(5); CALL mtr.add_suppression("Out of sort memory"); SET statement debug_dbug= '+d,alloc_sort_buffer_fail' for SELECT * FROM t1 ORDER BY f1 ASC, f0; ERROR HY001: Out of sort memory, consider increasing server sort buffer size SELECT * FROM t1 ORDER BY f1 ASC, f0; f0 f1 1 0 2 1 3 2 4 3 5 4 6 5 DROP TABLE t1; set @@debug_dbug= @save_debug_dbug; set statement DEBUG_SYNC = 'now SIGNAL hi' for select 1; ERROR 42000: The system variable debug_sync cannot be set in SET STATEMENT.