You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@hive.apache.org by "Sahil Takiar (JIRA)" <ji...@apache.org> on 2017/08/29 05:55:00 UTC
[jira] [Updated] (HIVE-17405) HoS DPP ConstantPropagate should use
ConstantPropagateOption.SHORTCUT
[ https://issues.apache.org/jira/browse/HIVE-17405?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sahil Takiar updated HIVE-17405:
--------------------------------
Status: Patch Available (was: Open)
> 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
> Attachments: HIVE-17405.1.patch
>
>
> 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.
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)