Github user dilipbiswal commented on a diff in the pull request:
https://github.com/apache/spark/pull/9348#discussion_r43354942
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
---
@@ -417,6 +417,14 @@ object NullPropagation extends Rule[LogicalPlan] {
case left :: Literal(null, _) :: Nil => Literal.create(null,
e.dataType)
case _ => e
}
+
+ // If the value expression is NULL then transform the In expression
to
+ // Literal(null)
+ case e @ In(v, list) => v match {
--- End diff --
@cloud-fan Thanks Wenchen for your prompt input as always. Got a question ..
- ConstantFolding rule seems to come after the NullPropagation. Would this
still work ?
- The 2nd test case i have added is failing
== FAIL: Plans do not match ===
!Filter null IN (1,cast(b#0 as string)) Filter null
LocalRelation [a#0,b#0,c#0] LocalRelation [a#0,b#0,c#0]
I am debugging it now. But thought i should check with you first..
Thanks again.
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