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From "Jonathan Coveney (JIRA)" <j...@apache.org>
Subject [jira] [Created] (PIG-3083) Introduce new syntax that let's you project just the columns that come from a given :: prefix
Date Fri, 07 Dec 2012 19:35:22 GMT
Jonathan Coveney created PIG-3083:
-------------------------------------

             Summary: Introduce new syntax that let's you project just the columns that come
from a given :: prefix
                 Key: PIG-3083
                 URL: https://issues.apache.org/jira/browse/PIG-3083
             Project: Pig
          Issue Type: Bug
            Reporter: Jonathan Coveney
             Fix For: 0.12


This is basically a more refined approach than PIG-3078, but it is also more work. That JIRA
is more of a stopgap until we do something like this.

The idea would be to support something like the following:

a = load 'a' as (x,y,z);
b = load 'b'  as (x,y,z);
c = join a by x, b by x;
d = foreach c generate a::*;

Obviously this is useful for any case where you have relations with columns with various prefixes.

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