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SPARK-3462 push down filters and projections into Unions
Author: Cody Koeninger <cody.koeninger@mediacrossing.com> Closes #2345 from koeninger/SPARK-3462 and squashes the following commits: 5c8d24d [Cody Koeninger] SPARK-3462 remove now-unused parameter 0788691 [Cody Koeninger] SPARK-3462 add tests, handle compatible schema with different aliases, per marmbrus feedback ef47b3b [Cody Koeninger] SPARK-3462 push down filters and projections into Unions
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- sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala 48 additions, 0 deletions...a/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
- sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/UnionPushdownSuite.scala 62 additions, 0 deletions...che/spark/sql/catalyst/optimizer/UnionPushdownSuite.scala
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