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From "Thejas M Nair (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (PIG-1963) in nested foreach, accumutive udf taking input from order-by does not get results in order
Date Mon, 04 Apr 2011 22:25:05 GMT

     [ https://issues.apache.org/jira/browse/PIG-1963?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Thejas M Nair updated PIG-1963:
-------------------------------

    Attachment: MYCONCATBAG.java

attaching udf used in the example.

> in nested foreach, accumutive udf taking input from order-by does not get results in
order
> ------------------------------------------------------------------------------------------
>
>                 Key: PIG-1963
>                 URL: https://issues.apache.org/jira/browse/PIG-1963
>             Project: Pig
>          Issue Type: Bug
>    Affects Versions: 0.8.0, 0.9.0
>            Reporter: Thejas M Nair
>         Attachments: MYCONCATBAG.java
>
>
> This happens only when secondary sort is not being used for the order-by. 
> For example -
> {code}
> a1 = load 'fruits.txt' as (f1:int,f2);
> a2 = load 'fruits.txt' as (f1:int,f2);
> b = cogroup a1 by f1, a2 by f1;
> d = foreach b {
>    sort1 = order a1 by f2;
>    sort2 = order a2 by f2; -- secondary sort not getting used here, MYCONCATBAG gets
results in wrong order
>    generate group, MYCONCATBAG(sort1.f1), MYCONCATBAG(sort2.f2);
> }
> -- explain d;
> dump d;
> {code}

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