ulysses-you commented on code in PR #47545:
URL: https://github.com/apache/spark/pull/47545#discussion_r1701399571
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala:
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@@ -246,8 +246,6 @@ abstract class Optimizer(catalogManager: CatalogManager)
CollapseProject,
RemoveRedundantAliases,
RemoveNoopOperators) :+
- Batch("InsertMapSortInGroupingExpressions", Once,
Review Comment:
It's good point. It may introduce new Aggregates in optimization, e.g.,
rewrite distinct, but seems not affect map type. We disallow these operators
on map type:
`Cannot have MAP type columns in DataFrame which calls set operations
(INTERSECT, EXCEPT, etc.),`
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