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Posted to dev@pig.apache.org by "Daniel Dai (JIRA)" <ji...@apache.org> on 2015/04/29 01:15:06 UTC

[jira] [Updated] (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 ]

Daniel Dai updated PIG-3473:
----------------------------
    Fix Version/s:     (was: 0.15.0)
                   0.16.0

> 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
>             Fix For: 0.16.0
>
>
> 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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