peter-toth commented on code in PR #37630:
URL: https://github.com/apache/spark/pull/37630#discussion_r952708961
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sql/core/src/main/scala/org/apache/spark/sql/execution/SparkOptimizer.scala:
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@@ -78,6 +77,9 @@ class SparkOptimizer(
PushPredicateThroughNonJoin,
RemoveNoopOperators) :+
Batch("User Provided Optimizers", fixedPoint,
experimentalMethods.extraOptimizations: _*) :+
+ Batch("Merge Scalar Subqueries", Once,
Review Comment:
I've moved the `MergeScalarSubqueries` rule to the end of optimization
phase, just before `ReplaceCTERefWithRepartition`. This is needed because we
need to peek into the physical plans.
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