[jira] [Assigned] (PIG-4767) Partition filter not pushed down when filter clause references variable from another load path

["Koji Noguchi (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PIG-4767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Koji Noguchi reassigned PIG-4767:
---------------------------------

    Assignee: Koji Noguchi

Taking a look.

> Partition filter not pushed down when filter clause references variable from another load path
> ----------------------------------------------------------------------------------------------
>
>                 Key: PIG-4767
>                 URL: https://issues.apache.org/jira/browse/PIG-4767
>             Project: Pig
>          Issue Type: Bug
>    Affects Versions: 0.15.0
>            Reporter: Anthony Hsu
>            Assignee: Koji Noguchi
>             Fix For: 0.17.0
>
>
> To reproduce:
> {noformat:title=test.pig}
> a = load 'a.txt';
> a_group = group a all;
> a_count = foreach a_group generate COUNT(a) as count;
> b = load 'mytable' using org.apache.hcatalog.pig.HCatLoader();
> b = filter b by datepartition == '2015-09-01-00' and foo == a_count.count;
> dump b;
> {noformat}
> The above query ends up reading all the table partitions. If you remove the {{foo == a_count.count}} clause or replace {{a_count.count}} with a constant, then partition filtering happens properly.



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