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From "Prashant Kommireddi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PIG-3473) org.apache.pig.Expression should support "is null" and "not" operations
Date Tue, 01 Apr 2014 21:06:27 GMT

    [ https://issues.apache.org/jira/browse/PIG-3473?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13957009#comment-13957009
] 

Prashant Kommireddi commented on PIG-3473:
------------------------------------------

[~aniket486] can we move this to 0.13?

> org.apache.pig.Expression should support "is null" and "not" operations
> -----------------------------------------------------------------------
>
>                 Key: PIG-3473
>                 URL: https://issues.apache.org/jira/browse/PIG-3473
>             Project: Pig
>          Issue Type: Improvement
>          Components: impl
>    Affects Versions: 0.11.1
>            Reporter: Aniket Mokashi
>            Assignee: Aniket Mokashi
>             Fix For: 0.12.1
>
>
> Currently Expression only support BinaryExpressions and Constants. Most of the other
logical expressions (cast, udf) need not be pushed down. But, it would make sense to be able
to pushdown is null and not operations (possibly negativeexpression).
> This change would have impact on LoadFunc's (hcatloader), we need to be careful and make
sure we do this in a backwards compatible way.



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