[jira] [Updated] (PIG-3088) Add a builtin udf which removes prefixes

["Jonathan Coveney (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PIG-3088?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jonathan Coveney updated PIG-3088:
----------------------------------

    Attachment: PIG-3088-0.patch

Attached a patch. Note that this includes all of PIG-3010 out of necessity. The new files here are RemovePrefix and TestRemovePrefix. I did this mainly to show what sort of useful things we can do with self-flattening functions.
                
> Add a builtin udf which removes prefixes
> ----------------------------------------
>
>                 Key: PIG-3088
>                 URL: https://issues.apache.org/jira/browse/PIG-3088
>             Project: Pig
>          Issue Type: New Feature
>            Reporter: Jonathan Coveney
>            Assignee: Jonathan Coveney
>         Attachments: PIG-3088-0.patch
>
>
> This is something that I always hear people complaining about. Note that this depends on the FlattenOutput annotation.
> This UDF supports the following.
> {code}
> a = load 'a' as (x1, y1, z1);
> b = load 'a' as (x2, y2, z2);
> c = join a by x1, b by x2;
> describe c;
> --c: {a::x1: bytearray,a::y1: bytearray,a::z1: bytearray,b::x2: bytearray,b::y2: bytearray,b::z2: bytearray}
> d = foreach c generate RemovePrefix(*);
> describe d;
> --d: {x1: bytearray,y1: bytearray,z1: bytearray,x2: bytearray,y2: bytearray,z2: bytearray}
> {code}

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