Github user hvanhovell commented on a diff in the pull request:
https://github.com/apache/spark/pull/12820#discussion_r61689405
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala
---
@@ -115,8 +115,8 @@ trait CheckAnalysis extends PredicateHelper {
case f @ Filter(condition, child) =>
splitConjunctivePredicates(condition).foreach {
case _: PredicateSubquery | Not(_: PredicateSubquery) =>
- case e if PredicateSubquery.hasPredicateSubquery(e) =>
- failAnalysis(s"Predicate sub-queries cannot be used in
nested conditions: $e")
+ case e if PredicateSubquery.hasNullAwarePredicate(e) =>
+ failAnalysis(s"Null-aware sub-queries cannot be used in
nested conditions: $e")
--- End diff --
What is the problem here? We cannot use the same condition we currently use
for NAAJ?
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