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Date: Wed, 17 Oct 2012 23:56:03 +0000 (UTC)
From: "Navis (JIRA)" <jira@apache.org>
To: hive-dev@hadoop.apache.org
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Subject: [jira] [Updated] (HIVE-3584) Merging compare predicates
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     [ https://issues.apache.org/jira/browse/HIVE-3584?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Navis updated HIVE-3584:
------------------------

    Status: Patch Available  (was: Open)

This patch contains input pruning for empty table, which means predicate for TS is FALSE, it does not read anything from it. This was supported behavior for partitioned table but for non-partitioned empty table, it was not.
                
> Merging compare predicates
> --------------------------
>
>                 Key: HIVE-3584
>                 URL: https://issues.apache.org/jira/browse/HIVE-3584
>             Project: Hive
>          Issue Type: Improvement
>          Components: Query Processor
>            Reporter: Navis
>            Assignee: Navis
>            Priority: Trivial
>         Attachments: HIVE-3584.D6069.1.patch
>
>
> Some compare predicates, for example 'a>10 AND a>20' can be merged into 'a>20'

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