Current TOP implementation needlessly results in a null bag name
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Key: PIG-2365
URL: https://issues.apache.org/jira/browse/PIG-2365
Project: Pig
Issue Type: Improvement
Affects Versions: 0.9.1, 0.10
Reporter: Jonathan Coveney
Priority: Minor
Fix For: 0.10, 0.9.2
Attachments: top.patch
Given that TOP is basically always used with FLATTEN, now that FLATTEN prepends
the bag name, the output is suboptimal.
a = load 'thing' as (x:int, y:int, z:int);
b = group a all;
c = foreach b generate flatten(TOP(10,1,a));
describe c;
--currently: c: {null::x: int,null::y: int,null::z: int}
--without a one line change could be: c: {a::x: int,a::y: int,a::z: int}
The current implementation actually throws away this info, so it's just a
matter of not doing that. Patch attached.
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