Sergey created PIG-3292:
---------------------------
Summary: Logical plan invalid state: duplicate uid in schema
during self-join to get cross product
Key: PIG-3292
URL: https://issues.apache.org/jira/browse/PIG-3292
Project: Pig
Issue Type: Bug
Components: parser
Affects Versions: 0.10.0
Environment: CDH 4.2
Reporter: Sergey
Hi.
Looks like PIG-3020
but works in a different way.
Our pig version is:
Apache Pig version 0.10.0-cdh4.2.0 (rexported)
compiled Feb 15 2013, 12:20:54
Accoring to release note, PIG-3020 is included into CDH 4.2 dist
http://archive.cloudera.com/cdh4/cdh/4/pig-0.10.0-cdh4.2.0.CHANGES.txt
The problem:
We want to do self join to get cross-product
{code}
a = load '/input' as (key, x);
a_group = group a by key;
b = foreach a_group {
y = a.x;
pair = cross a.x, y;
generate flatten(pair);
}
dump b;
{code}
And an error:
{code}
ERROR org.apache.pig.tools.grunt.Grunt - ERROR 2270: Logical plan invalid
state: duplicate uid in schema : 1-7::x#16:bytearray,y::x#16:bytearray
{code}
Here is workaround :)
{code}
a = load '/input' as (key, x:int);
a_group = group a by key;
b = foreach a_group {
y = foreach a generate -(-x);
pair = cross a.x, y;
generate flatten(pair);
}
dump b;
{code}
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