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Posted to dev@pig.apache.org by "Aniket Mokashi (JIRA)" <ji...@apache.org> on 2013/10/23 03:37:42 UTC

[jira] [Assigned] (PIG-3473) org.apache.pig.Expression should support "is null" and "not" operations

     [ https://issues.apache.org/jira/browse/PIG-3473?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Aniket Mokashi reassigned PIG-3473:
-----------------------------------

    Assignee: Aniket Mokashi

> 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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