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Date: Tue, 21 Aug 2012 08:48:38 +1100 (NCT)
From: "Carl Steinbach (JIRA)" <jira@apache.org>
To: hive-dev@hadoop.apache.org
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Subject: [jira] [Updated] (HIVE-2049) Push down partition pruning to JDO
 filtering for a subset of partition predicates
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     [ https://issues.apache.org/jira/browse/HIVE-2049?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Carl Steinbach updated HIVE-2049:
---------------------------------

    Labels: JDO PartitionPruner  (was: )
    
> Push down partition pruning to JDO filtering for a subset of partition predicates
> ---------------------------------------------------------------------------------
>
>                 Key: HIVE-2049
>                 URL: https://issues.apache.org/jira/browse/HIVE-2049
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Metastore
>            Reporter: Ning Zhang
>            Assignee: Ning Zhang
>              Labels: JDO, PartitionPruner
>             Fix For: 0.8.0
>
>         Attachments: HIVE-2049.2.patch, HIVE-2049.3.patch, HIVE-2049.4.patch, HIVE-2049.patch
>
>
> Several tasks:
>   - expose HiveMetaStoreClient.listPartitionsByFilter() to Hive.java so that PartitionPruner can use that for certain partition predicates. 
>   - figure out a safe subset of partition predicates that can be pushed down to JDO filtering. 
> By my initial testing for the 2nd part is equality queries with AND/OR can be pushed down and return correct results. However range queries on partition columns gave NPE by the JDO execute() function. This might be a bug in the JDO query string itself, but we need to figure it out and heavily test all cases. 

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