Mithun Radhakrishnan updated HIVE-11548:
    Status: Open  (was: Patch Available)

> 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
> 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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