anchovYu commented on code in PR #38776: URL: https://github.com/apache/spark/pull/38776#discussion_r1044807443
########## sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala: ########## @@ -424,8 +424,51 @@ case class OuterReference(e: NamedExpression) override def qualifier: Seq[String] = e.qualifier override def exprId: ExprId = e.exprId override def toAttribute: Attribute = e.toAttribute - override def newInstance(): NamedExpression = OuterReference(e.newInstance()) + override def newInstance(): NamedExpression = + OuterReference(e.newInstance()).setNameParts(nameParts) final override val nodePatterns: Seq[TreePattern] = Seq(OUTER_REFERENCE) + + // optional field, the original name parts of UnresolvedAttribute before it is resolved to + // OuterReference. Used in rule ResolveLateralColumnAlias to convert OuterReference back to + // LateralColumnAliasReference. + var nameParts: Option[Seq[String]] = None + def setNameParts(newNameParts: Option[Seq[String]]): OuterReference = { Review Comment: As we discussed before, I feel it is not safe to do so given the current solution in ResolveOuterReference that each rule is applied only once. I made up a query (it can't run, just for demonstration): ``` SELECT * FROM range(1, 7) WHERE ( SELECT id2 FROM (SELECT dept * 2.0 AS id, id + 1 AS id2 FROM $testTable)) > 5 ORDER BY id ``` It is possible that `dept * 2.0` is not resolved because it needs type conversion, so the LCA rule doesn't apply. Then it just wraps the `id` in `id + 1 AS id2` as OuterReference. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org