Fix for: Bug#44987 DELETE IGNORE and FK constraint

- Now DELETE IGNORE skips over rows with a foreign key constraints (as it was supposed to do)


mysql-test/r/foreign_key.result:
  Test case for Bug#44987 DELETE IGNORE and FK constraint
mysql-test/t/foreign_key.test:
  Test case for Bug#44987 DELETE IGNORE and FK constraint
sql/sql_delete.cc:
  Firx for Bug#44987 DELETE IGNORE and FK constraint
  Now DELETE IGNORE skips over rows with a foreign key constraints (as it was supposed to do)
  Bug fix inspired by: Moritz Mertinkat

mysql-test/r/foreign_key.result

-drop table if exists t1;
+drop table if exists t1,t2;
 create table t1 (
 a int not null references t2,
 b int not null references t2 (c),
@@ -13,3 +13,30 @@ foreign key (a,b) references t3 (c,d) on update set null);
 create index a on t1 (a);
 create unique index b on t1 (a,b);
 drop table t1;
+create table t1 (id int primary key) engine = innodb;
+create table t2 (id int PRIMARY KEY, FOREIGN KEY (id) REFERENCES t1(id)) engine=innodb;
+insert into t1 values (1), (2), (3), (4), (5), (6);
+insert into t2 values (3), (5);
+delete from t1;
+ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`id`) REFERENCES `t1` (`id`))
+select * from t1;
+id
+1
+2
+3
+4
+5
+6
+delete ignore from t1;
+Warnings:
+Error	1451	Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`id`) REFERENCES `t1` (`id`))
+Error	1451	Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`id`) REFERENCES `t1` (`id`))
+select row_count();
+row_count()
+-1
+select * from t1;
+id
+3
+5
+drop table t2;
+drop table t1;

mysql-test/t/foreign_key.test

@@ -2,8 +2,10 @@
 # Test syntax of foreign keys
 #
 
+-- source include/have_innodb.inc
+
 --disable_warnings
-drop table if exists t1;
+drop table if exists t1,t2;
 --enable_warnings
 
 create table t1 (
@@ -23,3 +25,23 @@ create unique index b on t1 (a,b);
 drop table t1;
 
 # End of 4.1 tests
+
+#
+# Test DELETE IGNORE
+# Bug#44987 DELETE IGNORE and FK constraint
+#
+
+create table t1 (id int primary key) engine = innodb;
+create table t2 (id int PRIMARY KEY, FOREIGN KEY (id) REFERENCES t1(id)) engine=innodb;
+insert into t1 values (1), (2), (3), (4), (5), (6);
+insert into t2 values (3), (5);
+
+--error 1451
+delete from t1;
+select * from t1;
+
+delete ignore from t1;
+select row_count();
+select * from t1;
+drop table t2;
+drop table t1;

sql/sql_delete.cc

@@ -335,8 +335,11 @@ bool mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds,
 	  InnoDB it can fail in a FOREIGN KEY error or an
 	  out-of-tablespace error.
 	*/
- 	error= 1;
-	break;
+        if (!select_lex->no_error)
+        {
+          error= 1;
+          break;
+        }
       }
     }
     else