Github user hvanhovell commented on a diff in the pull request: https://github.com/apache/spark/pull/18993#discussion_r133943823 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala --- @@ -1180,6 +1180,9 @@ object ConvertToLocalRelation extends Rule[LogicalPlan] { val projection = new InterpretedProjection(projectList, output) projection.initialize(0) LocalRelation(projectList.map(_.toAttribute), data.map(projection)) + + case Limit(IntegerLiteral(limit), LocalRelation(output, data)) => --- End diff -- This kinda violates the idea that we shouldn't rely on optimization for correctness, but I suppose this is ok.
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