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https://issues.apache.org/jira/browse/PIG-3088?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13528624#comment-13528624
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Russell Jurney commented on PIG-3088:
-------------------------------------
A = load foo;
B = load bar;
filter A by id > 5;
join A_1 by id, B by id;
// or A_filter
foreach A_1_B generate id;
store into foobar; // A_1_B_1 or A_filter_B_generate
Or some such routine?
We don't have to be explicit no more!
> 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
> Fix For: 0.12
>
> 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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