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https://issues.apache.org/jira/browse/PIG-3292?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13681358#comment-13681358
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Johnny Zhang commented on PIG-3292:
-----------------------------------
unit tests all pass.
> 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
> Assignee: Cheolsoo Park
> Labels: newbie
> Fix For: 0.12, 0.11.2
>
> Attachments: PIG-3292.patch
>
>
> 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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