viirya commented on a change in pull request #29950:
URL: https://github.com/apache/spark/pull/29950#discussion_r503662637
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
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@@ -216,7 +216,7 @@ abstract class Optimizer(catalogManager: CatalogManager)
// The following batch should be executed after batch "Join Reorder" and
"LocalRelation".
Batch("Check Cartesian Products", Once,
CheckCartesianProducts) :+
- Batch("RewriteSubquery", Once,
+ Batch("RewriteSubquery", fixedPoint,
Review comment:
Isn't `FixedPoint(1)` also to run the batch once?
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