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

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

     [ https://issues.apache.org/jira/browse/HIVE-17405?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sahil Takiar reassigned HIVE-17405:
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> 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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