updated e2e test ot use target destination

Signed-off-by: Harshit Gangal <harshit@planetscale.com>

go/test/endtoend/vtgate/lookup_test.go

@@ -203,7 +203,7 @@ func TestDMLScatter(t *testing.T) {
 	3 4
 	4 5
 	*/
-	exec(t, conn, "update t3 set id5 = 42 where id5 = 1")
+	exec(t, conn, "update `ks[-]`.t3 set id5 = 42 where id5 = 1")
 	qr = exec(t, conn, "select id5, id6, id7 from t3 order by id5")
 	if got, want := fmt.Sprintf("%v", qr.Rows), "[[INT64(2) INT64(2) INT64(3)] [INT64(3) INT64(4) INT64(3)] [INT64(4) INT64(5) INT64(4)] [INT64(42) INT64(2) INT64(3)]]"; got != want {
 		t.Errorf("select:\n%v want\n%v", got, want)
@@ -246,7 +246,7 @@ func TestDMLScatter(t *testing.T) {
 	require.Empty(t, qr.Rows)
 
 	// delete all the rows.
-	exec(t, conn, "delete from t3")
+	exec(t, conn, "delete from `ks[-]`.t3")
 	qr = exec(t, conn, "select * from t3")
 	require.Empty(t, qr.Rows)
 	qr = exec(t, conn, "select * from t3_id7_idx")

go/vt/vtgate/planbuilder/testdata/dml_cases.txt

@@ -2146,3 +2146,22 @@
     "Table": "user"
   }
 }
+
+# update with shard targeting without vindex
+"update `user[-]`.user_extra set val = 1"
+{
+  "QueryType": "UPDATE",
+  "Original": "update `user[-]`.user_extra set val = 1",
+  "Instructions": {
+    "OperatorType": "Update",
+    "Variant": "ByDestination",
+    "Keyspace": {
+      "Name": "user",
+      "Sharded": true
+    },
+    "TargetTabletType": "MASTER",
+    "MultiShardAutocommit": false,
+    "Query": "update user_extra set val = 1",
+    "Table": "user_extra"
+  }
+}