Github user liancheng commented on a diff in the pull request:
https://github.com/apache/spark/pull/3784#discussion_r22268264
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
---
@@ -348,6 +349,37 @@ object CombineFilters extends Rule[LogicalPlan] {
}
/**
+ * Normalizes conjunctions and disjunctions to eliminate common factors.
+ */
+object NormalizeFilters extends Rule[LogicalPlan] with PredicateHelper {
+ override def apply(plan: LogicalPlan): LogicalPlan = plan transform {
+ case f @ Filter(predicate: Predicate, child) =>
--- End diff --
Ah, `f.transformExpressionUp` is really a good idea! Moving to
`BooleanSimplification` also makes sense. Thanks for the suggestions :)
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