Brian Tan created PIG-2719:
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Summary: Describe displays wrong column name after self-join
Key: PIG-2719
URL: https://issues.apache.org/jira/browse/PIG-2719
Project: Pig
Issue Type: Bug
Affects Versions: 0.10.0, 0.9.2
Reporter: Brian Tan
This is demonstrated by the following simple example.
Notice e and f wrongly describe the name of the first column as y2 rather than
y1
1.txt:
1, 2, 3
4, 5, 6
7, 8, 9
a = load '1.txt' using PigStorage(',') as (x:int, y:int, z:int);
b = foreach a generate *;
c = join a by x, b by x;
d = foreach c generate a.y as y1, b.y as y2;
describe d;
d: {y1: int,y2: int}
e = foreach d generate y1, y2;
describe e;
e: {y2: int,y2: int}
f = foreach e generate y1;
describe f;
f: {y2: int}
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