remove extra filters created by predicate pushdown
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Key: HIVE-815
URL: https://issues.apache.org/jira/browse/HIVE-815
Project: Hadoop Hive
Issue Type: Improvement
Components: Query Processor
Reporter: Namit Jain
Currently, predicate pushdown creates a copy of the filter in many places.
In a separate optimization step, these should be merged/removed
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