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https://issues.apache.org/jira/browse/HIVE-4914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13754201#comment-13754201
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Ashutosh Chauhan commented on HIVE-4914:
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If there are udfs in expression we should still do expression eval on client
because
* Otherwise user jar is required on server.
* It will be security concern to run user code in metastore server.
> filtering via partition name should be done inside metastore server
> (implementation)
> ------------------------------------------------------------------------------------
>
> Key: HIVE-4914
> URL: https://issues.apache.org/jira/browse/HIVE-4914
> Project: Hive
> Issue Type: Improvement
> Components: Metastore
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Attachments: HIVE-4914.01.patch, HIVE-4914.D12561.1.patch,
> HIVE-4914-only-no-gen.patch, HIVE-4914-only.patch, HIVE-4914.patch,
> HIVE-4914.patch, HIVE-4914.patch
>
>
> Currently, if the filter pushdown is impossible (which is most cases), the
> client gets all partition names from metastore, filters them, and asks for
> partitions by names for the filtered set.
> Metastore server code should do that instead; it should check if pushdown is
> possible and do it if so; otherwise it should do name-based filtering.
> Saves the roundtrip with all partition names from the server to client, and
> also removes the need to have pushdown viability checking on both sides.
> NO PRECOMMIT TESTS
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