cloud-fan commented on code in PR #39170:
URL: https://github.com/apache/spark/pull/39170#discussion_r1164949236
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/InjectRuntimeFilter.scala:
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@@ -114,44 +114,66 @@ object InjectRuntimeFilter extends Rule[LogicalPlan] with
PredicateHelper with J
}
/**
- * Returns whether the plan is a simple filter over scan and the filter is
likely selective
- * Also check if the plan only has simple expressions (attribute reference,
literals) so that we
- * do not add a subquery that might have an expensive computation
+ * Extracts a sub-plan which is a simple filter over scan from the input
plan. The simple
+ * filter should be selective and the filter condition (including
expressions in the child
+ * plan referenced by the filter condition) should be a simple expression,
so that we do
+ * not add a subquery that might have an expensive computation.
*/
- private def isSelectiveFilterOverScan(plan: LogicalPlan): Boolean = {
+ private def extractSelectiveFilterOverScan(
+ plan: LogicalPlan,
+ filterCreationSideExp: Expression): Option[LogicalPlan] = {
+ var currentPlan: LogicalPlan = plan
Review Comment:
let's pass it as a parameter of `def extract`
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