HyukjinKwon commented on code in PR #44460:
URL: https://github.com/apache/spark/pull/44460#discussion_r1436181963
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala:
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@@ -1706,14 +1706,18 @@ object PushPredicateThroughNonJoin extends
Rule[LogicalPlan] with PredicateHelpe
// implies that, for a given input row, the output are determined by the
expression's initial
// state and all the input rows processed before. In another word, the
order of input rows
// matters for non-deterministic expressions, while pushing down
predicates changes the order.
- // This also applies to Aggregate.
case Filter(condition, project @ Project(fields, grandChild))
if fields.forall(_.deterministic) && canPushThroughCondition(grandChild,
condition) =>
val aliasMap = getAliasMap(project)
project.copy(child = Filter(replaceAlias(condition, aliasMap),
grandChild))
+ // Push [[Filter]] operators through [[Aggregate]] operators. Parts of the
predicates that can
Review Comment:
Let's use backquotes here instead of `[[...]]`. `[[..]]` is a Scaladoc
syntax so we don't need to do this here.
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