Add support for Row expression.

tests/mysql/with_test.go

@@ -164,10 +164,10 @@ WITH payments_to_delete AS (
      WHERE payment.amount < 0.5
 )
 DELETE FROM dvds.payment
-WHERE payment.payment_id IN (
+WHERE payment.payment_id IN ((
            SELECT payments_to_delete.''payment.payment_id'' AS "payment.payment_id"
            FROM payments_to_delete
-      );
+      ));
 `, "''", "`"))
 
 	tx, err := db.Begin()