maropu commented on a change in pull request #24209: [SPARK-27255][SQL] Report
error when illegal expressions are hosted by a plan operator.
URL: https://github.com/apache/spark/pull/24209#discussion_r270703477
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
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@@ -52,29 +52,7 @@ abstract class Optimizer(sessionCatalog: SessionCatalog)
* Returns true when all operators are integral.
*/
private def checkSpecialExpressionIntegrity(plan: LogicalPlan): Boolean = {
Review comment:
It seems this private function is called by `isPlanIntegral` only, so we
need to define this separately?
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