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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-8492) Enhance Constant Folding to propagate constants for simple expressions
Date Sat, 18 Oct 2014 18:11:34 GMT

     [ https://issues.apache.org/jira/browse/HIVE-8492?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ashutosh Chauhan updated HIVE-8492:
-----------------------------------
    Attachment: HIVE-8492.1.patch

Addressed Sergey's comments.

> Enhance Constant Folding to propagate constants for simple expressions 
> -----------------------------------------------------------------------
>
>                 Key: HIVE-8492
>                 URL: https://issues.apache.org/jira/browse/HIVE-8492
>             Project: Hive
>          Issue Type: Improvement
>          Components: Logical Optimizer
>    Affects Versions: 0.14.0
>            Reporter: Ashutosh Chauhan
>            Assignee: Ashutosh Chauhan
>         Attachments: HIVE-8492.1.patch, HIVE-8492.patch
>
>
> currently it propagates only for projects, can be enhanced to propagate for simple expressions
like casts, e.g,
> {code}
> SELECT src1.key, src1.key + 1, src2.value FROM src src1 join src src2 ON src1.key = src2.key
AND cast(src1.key as double) = 86; 
> {code}



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