Backport of the fix for bug #49552 to 5.0-bugteam

mysql-test/r/delete.result

@@ -241,4 +241,16 @@ DELETE FROM t1 ORDER BY (f1(10)) LIMIT 1;
 ERROR 42000: Incorrect number of arguments for FUNCTION test.f1; expected 0, got 1
 DROP TABLE t1;
 DROP FUNCTION f1;
+#
+# Bug #49552 : sql_buffer_result cause crash + not found records 
+#   in multitable delete/subquery
+#
+CREATE TABLE t1(a INT);
+INSERT INTO t1 VALUES (1),(2),(3);
+SET SESSION SQL_BUFFER_RESULT=1;
+DELETE t1 FROM (SELECT SUM(a) a FROM t1) x,t1;
+SET SESSION SQL_BUFFER_RESULT=DEFAULT;
+SELECT * FROM t1;
+a
+DROP TABLE t1;
 End of 5.0 tests

mysql-test/t/delete.test

@@ -247,4 +247,19 @@ DELETE FROM t1 ORDER BY (f1(10)) LIMIT 1;
 DROP TABLE t1;
 DROP FUNCTION f1;
 
+
+--echo #
+--echo # Bug #49552 : sql_buffer_result cause crash + not found records 
+--echo #   in multitable delete/subquery
+--echo #
+
+CREATE TABLE t1(a INT);
+INSERT INTO t1 VALUES (1),(2),(3);
+SET SESSION SQL_BUFFER_RESULT=1;
+DELETE t1 FROM (SELECT SUM(a) a FROM t1) x,t1;
+
+SET SESSION SQL_BUFFER_RESULT=DEFAULT;
+SELECT * FROM t1;
+DROP TABLE t1;
+
 --echo End of 5.0 tests

sql/sql_parse.cc

@@ -4009,9 +4009,9 @@ mysql_execute_command(THD *thd)
 			select_lex->where,
 			0, (ORDER *)NULL, (ORDER *)NULL, (Item *)NULL,
 			(ORDER *)NULL,
-			select_lex->options | thd->options |
+			(select_lex->options | thd->options |
 			SELECT_NO_JOIN_CACHE | SELECT_NO_UNLOCK |
-                        OPTION_SETUP_TABLES_DONE,
+                        OPTION_SETUP_TABLES_DONE) & ~OPTION_BUFFER_RESULT,
 			del_result, unit, select_lex);
       res|= thd->net.report_error;
       if (unlikely(res))