beliefer commented on code in PR #39170:
URL: https://github.com/apache/spark/pull/39170#discussion_r1161614362
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/InjectRuntimeFilter.scala:
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@@ -114,11 +114,13 @@ 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
+ * Returns whether the plan exists 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
Review Comment:
It's good to adds these comment to `tryInjectRuntimeFilter`
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