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[SPARK-13722][SQL] No Push Down for Non-deterministics Predicates through Generate
#### What changes were proposed in this pull request? Non-deterministic predicates should not be pushed through Generate. #### How was this patch tested? Added a test case in `FilterPushdownSuite.scala` Author: gatorsmile <gatorsmile@gmail.com> Closes #11562 from gatorsmile/pushPredicateDownWindow.
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- sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala 1 addition, 1 deletion...a/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
- sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/FilterPushdownSuite.scala 18 additions, 0 deletions...he/spark/sql/catalyst/optimizer/FilterPushdownSuite.scala
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