Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/13887#discussion_r68380891
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/InMemoryTableScanExec.scala
---
@@ -79,6 +79,11 @@ private[sql] case class InMemoryTableScanExec(
case IsNull(a: Attribute) => statsFor(a).nullCount > 0
case IsNotNull(a: Attribute) => statsFor(a).count -
statsFor(a).nullCount > 0
+
+ case In(a: AttributeReference, list: Seq[Expression])
+ if list.length <= inMemoryPartitionPruningMaxInSize =>
+ list.map(l => statsFor(a).lowerBound <= l.asInstanceOf[Literal] &&
--- End diff --
how about we do this optimization for `InSet`? It guarantees the list are
all literals and the max length by default is 10. Then we can save the new
config.
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