Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/22778#discussion_r227261253
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
---
@@ -171,9 +171,11 @@ abstract class Optimizer(sessionCatalog:
SessionCatalog)
// "Extract PythonUDF From JoinCondition".
Batch("Check Cartesian Products", Once,
CheckCartesianProducts) :+
- Batch("RewriteSubquery", Once,
+ Batch("Rewrite Subquery", Once,
RewritePredicateSubquery,
ColumnPruning,
+ InferFiltersFromConstraints,
+ PushDownPredicate,
--- End diff --
looks good, cc @gatorsmile @maryannxue
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