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https://issues.apache.org/jira/browse/HIVE-11548?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mithun Radhakrishnan updated HIVE-11548:
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Attachment: HIVE-11548.6-branch-2.2.patch
> HCatLoader should support predicate pushdown.
> ---------------------------------------------
>
> Key: HIVE-11548
> URL: https://issues.apache.org/jira/browse/HIVE-11548
> Project: Hive
> Issue Type: New Feature
> Components: HCatalog
> Affects Versions: 3.0.0
> Reporter: Mithun Radhakrishnan
> Assignee: Mithun Radhakrishnan
> Attachments: HIVE-11548.1.patch, HIVE-11548.2.patch,
> HIVE-11548.3.patch, HIVE-11548.4.patch, HIVE-11548.5.patch,
> HIVE-11548.6-branch-2.2.patch, HIVE-11548.6-branch-2.patch, HIVE-11548.6.patch
>
>
> When one uses {{HCatInputFormat}}/{{HCatLoader}} to read from file-formats
> that support predicate pushdown (such as ORC, with
> {{hive.optimize.index.filter=true}}), one sees that the predicates aren't
> actually pushed down into the storage layer.
> The forthcoming patch should allow for filter-pushdown, if any of the
> partitions being scanned with {{HCatLoader}} support the functionality. The
> patch should technically allow the same for users of {{HCatInputFormat}}, but
> I don't currently have a neat interface to build a compound
> predicate-expression. Will add this separately, if required.
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