cloud-fan commented on code in PR #39377:
URL: https://github.com/apache/spark/pull/39377#discussion_r1063256483
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sql/core/src/main/scala/org/apache/spark/sql/catalyst/optimizer/InjectRuntimeFilter.scala:
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@@ -146,7 +147,7 @@ object InjectRuntimeFilter extends Rule[LogicalPlan] with
PredicateHelper with J
predicateReference ++ condition.references,
hasHitFilter = true,
hasHitSelectiveFilter = hasHitSelectiveFilter ||
isLikelySelective(condition))
- case _: LeafNode => hasHitSelectiveFilter
+ case l: LeafNode => hasHitSelectiveFilter || hasSelectivePredicate(l)
Review Comment:
how about we add a new trait `LeafNodeWithAccurateStats`? `InMemoryRelation`
will be the only implementation. Then here we can just do
```
case l: LeafNodeWithAccurateStats => l.stats.rowCount.exists(_ <
a_threshold)
```
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