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[SPARK-17269][SQL] Move finish analysis optimization stage into its own file
## What changes were proposed in this pull request? As part of breaking Optimizer.scala apart, this patch moves various finish analysis optimization stage rules into a single file. I'm submitting separate pull requests so we can more easily merge this in branch-2.0 to simplify optimizer backports. ## How was this patch tested? This should be covered by existing tests. Author: Reynold Xin <rxin@databricks.com> Closes #14838 from rxin/SPARK-17269.
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- sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala 0 additions, 38 deletions...a/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
- sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/RewriteDistinctAggregates.scala 1 addition, 1 deletion...rk/sql/catalyst/optimizer/RewriteDistinctAggregates.scala
- sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/finishAnalysis.scala 65 additions, 0 deletions.../apache/spark/sql/catalyst/optimizer/finishAnalysis.scala
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