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Posted to dev@hive.apache.org by "Ashutosh Chauhan (JIRA)" <ji...@apache.org> on 2013/12/24 00:02:50 UTC

[jira] [Updated] (HIVE-3584) Merging compare predicates

     [ https://issues.apache.org/jira/browse/HIVE-3584?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ashutosh Chauhan updated HIVE-3584:
-----------------------------------

    Status: Open  (was: Patch Available)

bq. 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.

To make review easier shall we separate current patch into 2. One for input pruning for non-partitioned empty table. 2nd for actually merging predicates. 2nd one anyway depends on HIVE-3617, so 1st one can get in probably earlier.

> 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, HIVE-3584.D6069.2.patch
>
>
> Some compare predicates, for example 'a>10 AND a>20' can be merged into 'a>20'



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