Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/12720#discussion_r61507610
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
---
@@ -644,9 +643,10 @@ object InferFiltersFromConstraints extends
Rule[LogicalPlan] with PredicateHelpe
case join @ Join(left, right, joinType, conditionOpt) =>
// Only consider constraints that can be pushed down completely to
either the left or the
- // right child
- val constraints = join.constraints.filter { c =>
- c.references.subsetOf(left.outputSet) ||
c.references.subsetOf(right.outputSet)}
+ // right child and that are not a subquery.
+ val constraints =
join.constraints.filterNot(PredicateSubquery.hasPredicateSubquery).filter {
--- End diff --
I think we could remove all the predicates that has PredicateSubquery from
constraints
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