fix test

Signed-off-by: crazycs520 <[email protected]>

ddl/db_partition_test.go

@@ -2246,14 +2246,6 @@ func TestExchangePartitionTableCompatiable(t *testing.T) {
 			"alter table pt8 exchange partition p0 with table nt8;",
 			dbterror.ErrTablesDifferentMetadata,
 		},
-		{
-			// foreign key test
-			// Partition table doesn't support to add foreign keys in mysql
-			"create table pt9 (id int not null primary key auto_increment,t_id int not null) partition by hash(id) partitions 1;",
-			"create table nt9 (id int not null primary key auto_increment, t_id int not null,foreign key fk_id (t_id) references pt5(id));",
-			"alter table pt9 exchange partition p0 with table nt9;",
-			dbterror.ErrPartitionExchangeForeignKey,
-		},
 		{
 			// Generated column (virtual)
 			"create table pt10 (id int not null, lname varchar(30), fname varchar(100) generated always as (concat(lname,' ')) virtual) partition by hash(id) partitions 1;",