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[SPARK-13168][SQL] Collapse adjacent repartition operators
Spark SQL should collapse adjacent `Repartition` operators and only keep the last one. Author: Josh Rosen <joshrosen@databricks.com> Closes #11064 from JoshRosen/collapse-repartition.
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- sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala 14 additions, 2 deletions...a/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
- sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/CollapseProjectSuite.scala 2 additions, 2 deletions...e/spark/sql/catalyst/optimizer/CollapseProjectSuite.scala
- sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/FilterPushdownSuite.scala 1 addition, 1 deletion...he/spark/sql/catalyst/optimizer/FilterPushdownSuite.scala
- sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/JoinOrderSuite.scala 1 addition, 1 deletion.../apache/spark/sql/catalyst/optimizer/JoinOrderSuite.scala
- sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala 13 additions, 2 deletions...t/scala/org/apache/spark/sql/execution/PlannerSuite.scala
- sql/hive/src/main/scala/org/apache/spark/sql/hive/SQLBuilder.scala 2 additions, 2 deletions...src/main/scala/org/apache/spark/sql/hive/SQLBuilder.scala
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