[jira] [Updated] (HIVE-4579) Create a SARG interface for RecordReaders

["Owen O'Malley (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-4579?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Owen O'Malley updated HIVE-4579:
--------------------------------

    Status: Patch Available  (was: Open)

This patch creates the interface for creating and interpreting search arguments.
                
> Create a SARG interface for RecordReaders
> -----------------------------------------
>
>                 Key: HIVE-4579
>                 URL: https://issues.apache.org/jira/browse/HIVE-4579
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Owen O'Malley
>            Assignee: Owen O'Malley
>         Attachments: h-4579.patch, pushdown.pdf
>
>
> I think we should create a SARG (http://en.wikipedia.org/wiki/Sargable) interface for RecordReaders. For a first pass, I'll create an API that uses the value stored in hive.io.filter.expr.serialized.
> The desire is to define an simpler interface that the direct AST expression that is provided by hive.io.filter.expr.serialized so that the code to evaluate expressions can be generalized instead of put inside a particular RecordReader.

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