cloud-fan commented on a change in pull request #30504: URL: https://github.com/apache/spark/pull/30504#discussion_r530603409
########## File path: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala ########## @@ -873,24 +873,30 @@ object InferFiltersFromGenerate extends Rule[LogicalPlan] { if !e.deterministic || e.children.forall(_.foldable) => generate case generate @ Generate(g, _, false, _, _, _) if canInferFilters(g) => - // Exclude child's constraints to guarantee idempotency - val inferredFilters = ExpressionSet( - Seq( - GreaterThan(Size(g.children.head), Literal(0)), - IsNotNull(g.children.head) - ) - ) -- generate.child.constraints - - if (inferredFilters.nonEmpty) { - generate.copy(child = Filter(inferredFilters.reduce(And), generate.child)) - } else { - generate + g.children.head match { Review comment: For safety we can add an `assert(g.children.length == 1)`. ---------------------------------------------------------------- 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. 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