Fix #363 e,g, `select * from t as a` The plan phase in from is table plan -> join plan, and we can only get the alias name in join plan, so if we return origin table plan directly in join Filter, we may get wrong result fields.
Fix #363 e,g, `select * from t as a` The plan phase in from is table plan -> join plan, and we can only get the alias name in join plan, so if we return origin table plan directly in join Filter, we may get wrong result fields.