Github user liancheng commented on a diff in the pull request:
https://github.com/apache/spark/pull/14012#discussion_r70032565
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
---
@@ -1135,11 +1146,16 @@ object PushDownPredicate extends Rule[LogicalPlan]
with PredicateHelper {
// For each filter, expand the alias and check if the filter can be
evaluated using
// attributes produced by the aggregate operator's child operator.
- val (pushDown, stayUp) =
splitConjunctivePredicates(condition).partition { cond =>
+ val (candidates, containingNonDeterministic) =
+ splitConjunctivePredicates(condition).span(_.deterministic)
+
+ val (pushDown, rest) = candidates.partition { cond =>
val replaced = replaceAlias(cond, aliasMap)
- replaced.references.subsetOf(aggregate.child.outputSet) &&
replaced.deterministic
+ replaced.references.subsetOf(aggregate.child.outputSet)
}
+ val stayUp = rest ++ containingNonDeterministic
+
--- End diff --
Seems that it makes more sense to factor this snippet out as a helper
method.
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