cloud-fan commented on a change in pull request #32179:
URL: https://github.com/apache/spark/pull/32179#discussion_r613724995
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala
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@@ -950,9 +950,15 @@ trait CheckAnalysis extends PredicateHelper with
LookupCatalog {
case f: Filter =>
val (correlated, _) =
splitConjunctivePredicates(f.condition).partition(containsOuter)
- // Find any non-equality correlated predicates
+ // Find any non-equality correlated predicates and equality predicates
that do not
+ // guarantee one-on-one mapping between inner and outer attributes.
E.G:
+ // a = outer(c) -> true
Review comment:
Agree, we should refine this.
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