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From "Ran Postar (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-1643) support range scans and non-key columns in HBase filter pushdown
Date Tue, 16 Jun 2015 20:57:01 GMT

    [ https://issues.apache.org/jira/browse/HIVE-1643?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14588759#comment-14588759
] 

Ran Postar commented on HIVE-1643:
----------------------------------

I understand that pushing down the expression to hbase is complicated especially when working
with multiple tables. But is it possible to add a hinting mechanism?
We can added to each "from table" a hint for startRow and stopRow for the scan, and when HiveHBaseTableInputFormat
scan the table it will added the startRow & stopRow. And for the first Part we will leave
the user the possibility to optimize specific table scan.

> support range scans and non-key columns in HBase filter pushdown
> ----------------------------------------------------------------
>
>                 Key: HIVE-1643
>                 URL: https://issues.apache.org/jira/browse/HIVE-1643
>             Project: Hive
>          Issue Type: Improvement
>          Components: HBase Handler
>    Affects Versions: 0.9.0
>            Reporter: John Sichi
>            Assignee: bharath v
>              Labels: patch
>         Attachments: HIVE-1643.patch, Hive-1643.2.patch, hbase_handler.patch
>
>
> HIVE-1226 added support for WHERE rowkey=3.  We would like to support WHERE rowkey BETWEEN
10 and 20, as well as predicates on non-rowkeys (plus conjunctions etc).  Non-rowkey conditions
can't be used to filter out entire ranges, but they can be used to push the per-row filter
processing as far down as possible.



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