mgaido91 commented on a change in pull request #23057: [SPARK-26078][SQL] Dedup self-join attributes on IN subqueries URL: https://github.com/apache/spark/pull/23057#discussion_r241370597
########## File path: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/subquery.scala ########## @@ -43,31 +43,44 @@ import org.apache.spark.sql.types._ * condition. */ object RewritePredicateSubquery extends Rule[LogicalPlan] with PredicateHelper { - private def dedupJoin(joinPlan: LogicalPlan): LogicalPlan = joinPlan match { + + private def buildJoin( + outerPlan: LogicalPlan, + subplan: LogicalPlan, + joinType: JoinType, + condition: Option[Expression]): Join = { + // Deduplicate conflicting attributes if any. + val dedupSubplan = dedupSubqueryOnSelfJoin(outerPlan, subplan) + Join(outerPlan, dedupSubplan, joinType, condition) Review comment: I am not sure about this: how do we check it? If the same attribute is present on both sides of a BinaryOperator? Is this always forbidden? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org