IGNORE option was added for DELETE statement (WL#1334)

mysql-test/r/delete.result

-drop table if exists t1;
+drop table if exists t1,t11,t12,t2;
 CREATE TABLE t1 (a tinyint(3), b tinyint(5));
 INSERT INTO t1 VALUES (1,1);
 INSERT LOW_PRIORITY INTO t1 VALUES (1,2);
@@ -58,3 +58,65 @@ select count(*) from t1;
 count(*)
 0
 drop table t1;
+create table t11 (a int NOT NULL, b int, primary key (a));
+create table t12 (a int NOT NULL, b int, primary key (a));
+create table t2 (a int NOT NULL, b int, primary key (a));
+insert into t11 values (0, 10),(1, 11),(2, 12);
+insert into t12 values (33, 10),(0, 11),(2, 12);
+insert into t2 values (1, 21),(2, 12),(3, 23);
+select * from t11;
+a	b
+0	10
+1	11
+2	12
+select * from t12;
+a	b
+33	10
+0	11
+2	12
+select * from t2;
+a	b
+1	21
+2	12
+3	23
+delete t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b <> (select b from t2 where t11.a < t2.a);
+ERROR 21000: Subquery returns more than 1 row
+select * from t11;
+a	b
+0	10
+1	11
+2	12
+select * from t12;
+a	b
+33	10
+0	11
+2	12
+delete ignore t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b <> (select b from t2 where t11.a < t2.a);
+Warnings:
+Error	1241	Subquery returns more than 1 row
+Error	1241	Subquery returns more than 1 row
+select * from t11;
+a	b
+0	10
+1	11
+select * from t12;
+a	b
+33	10
+0	11
+insert into t11 values (2, 12);
+delete from t11 where t11.b <> (select b from t2 where t11.a < t2.a);
+ERROR 21000: Subquery returns more than 1 row
+select * from t11;
+a	b
+0	10
+1	11
+2	12
+delete ignore from t11 where t11.b <> (select b from t2 where t11.a < t2.a);
+Warnings:
+Error	1241	Subquery returns more than 1 row
+Error	1241	Subquery returns more than 1 row
+select * from t11;
+a	b
+0	10
+1	11
+drop table t11, t12, t2;

mysql-test/r/subselect.result

@@ -1569,32 +1569,3 @@ INSERT INTO t2 VALUES (100, 200, 'C');
 SELECT DISTINCT COLC FROM t1 WHERE COLA = (SELECT COLA FROM t2 WHERE COLB = 200 AND COLC ='C' LIMIT 1);
 COLC
 DROP TABLE t1, t2;
-create table t11 (a int NOT NULL, b int, primary key (a));
-create table t12 (a int NOT NULL, b int, primary key (a));
-create table t2 (a int NOT NULL, b int, primary key (a));
-insert into t11 values (0, 10),(1, 11),(2, 12);
-insert into t12 values (33, 10),(22, 11),(2, 12);
-insert into t2 values (1, 21),(2, 12),(3, 23);
-select * from t11;
-a	b
-0	10
-1	11
-2	12
-select * from t12;
-a	b
-33	10
-22	11
-2	12
-select * from t2;
-a	b
-1	21
-2	12
-3	23
-delete t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b > (select b from t2);
-ERROR 21000: Subquery returns more than 1 row
-select * from t2;
-a	b
-1	21
-2	12
-3	23
-drop table t11, t12, t2;

mysql-test/t/delete.test

@@ -3,7 +3,7 @@
 #
 
 --disable_warnings
-drop table if exists t1;
+drop table if exists t1,t11,t12,t2;
 --enable_warnings
 CREATE TABLE t1 (a tinyint(3), b tinyint(5));
 INSERT INTO t1 VALUES (1,1);
@@ -71,3 +71,30 @@ delete from t1 where 3 > 2;
 select count(*) from t1;
 
 drop table t1;
+
+#
+# IGNORE option
+#
+create table t11 (a int NOT NULL, b int, primary key (a));
+create table t12 (a int NOT NULL, b int, primary key (a));
+create table t2 (a int NOT NULL, b int, primary key (a));
+insert into t11 values (0, 10),(1, 11),(2, 12);
+insert into t12 values (33, 10),(0, 11),(2, 12);
+insert into t2 values (1, 21),(2, 12),(3, 23);
+select * from t11;
+select * from t12;
+select * from t2;
+-- error 1241
+delete t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b <> (select b from t2 where t11.a < t2.a);
+select * from t11;
+select * from t12;
+delete ignore t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b <> (select b from t2 where t11.a < t2.a);
+select * from t11;
+select * from t12;
+insert into t11 values (2, 12);
+-- error 1241
+delete from t11 where t11.b <> (select b from t2 where t11.a < t2.a);
+select * from t11;
+delete ignore from t11 where t11.b <> (select b from t2 where t11.a < t2.a);
+select * from t11;
+drop table t11, t12, t2;

mysql-test/t/subselect.test

@@ -1009,21 +1009,3 @@ INSERT INTO t1 VALUES (1,1,'1A3240'), (1,2,'4W2365');
 INSERT INTO t2 VALUES (100, 200, 'C');
 SELECT DISTINCT COLC FROM t1 WHERE COLA = (SELECT COLA FROM t2 WHERE COLB = 200 AND COLC ='C' LIMIT 1);
 DROP TABLE t1, t2;
-
-#
-# errors handling
-#
-
-create table t11 (a int NOT NULL, b int, primary key (a));
-create table t12 (a int NOT NULL, b int, primary key (a));
-create table t2 (a int NOT NULL, b int, primary key (a));
-insert into t11 values (0, 10),(1, 11),(2, 12);
-insert into t12 values (33, 10),(22, 11),(2, 12);
-insert into t2 values (1, 21),(2, 12),(3, 23);
-select * from t11;
-select * from t12;
-select * from t2;
--- error 1241
-delete t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b > (select b from t2);
-select * from t2;
-drop table t11, t12, t2;

sql/sql_delete.cc

@@ -66,6 +66,9 @@ int mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds, ORDER *order,
     DBUG_RETURN(1);
   }
 
+  if (thd->lex.duplicates == DUP_IGNORE)
+    thd->lex.select_lex.no_error= 1;
+
   /* Test if the user wants to delete all rows */
   if (!using_limit && const_cond && (!conds || conds->val_int()) &&
       !(specialflag & (SPECIAL_NO_NEW_FUNC | SPECIAL_SAFE_MODE)))

sql/sql_yacc.yy

@@ -3895,7 +3895,8 @@ opt_delete_options:
 
 opt_delete_option:
 	QUICK		{ Select->options|= OPTION_QUICK; }
-	| LOW_PRIORITY	{ Lex->lock_option= TL_WRITE_LOW_PRIORITY; };
+	| LOW_PRIORITY	{ Lex->lock_option= TL_WRITE_LOW_PRIORITY; }
+	| IGNORE_SYM	{ Lex->duplicates= DUP_IGNORE; };
 
 truncate:
 	TRUNCATE_SYM opt_table_sym table_name