[jira] [Created] (HIVE-17405) HoS DPP ConstantPropagate should use ConstantPropagateOption.SHORTCUT

["Sahil Takiar (JIRA)" <ji...@apache.org>]

Sahil Takiar created HIVE-17405:
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             Summary: HoS DPP ConstantPropagate should use ConstantPropagateOption.SHORTCUT
                 Key: HIVE-17405
                 URL: https://issues.apache.org/jira/browse/HIVE-17405
             Project: Hive
          Issue Type: Sub-task
          Components: Spark
            Reporter: Sahil Takiar
            Assignee: Sahil Takiar


In {{SparkCompiler#runDynamicPartitionPruning}} we should change {{new ConstantPropagate().transform(parseContext)}} to {{new ConstantPropagate(ConstantPropagateOption.SHORTCUT).transform(parseContext)}}

Hive-on-Tez does the same thing.

Running the full constant propagation isn't really necessary, we just want to eliminate any {{and true}} predicates that were introduced by {{SyntheticJoinPredicate}} and {{DynamicPartitionPruningOptimization}}. The {{SyntheticJoinPredicate}} will introduce dummy filter predicates into the operator tree, and {{DynamicPartitionPruningOptimization}} will replace them. The predicates introduced via {{SyntheticJoinPredicate}} are necessary to help {{DynamicPartitionPruningOptimization}} determine if DPP can be used or not.



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