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https://issues.apache.org/jira/browse/PIG-644?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daniel Dai updated PIG-644:
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Attachment: PIG-644-1.patch
Add a SchemaAliasValidator to do this check.
> Duplicate column names in foreach do not throw parser error
> -----------------------------------------------------------
>
> Key: PIG-644
> URL: https://issues.apache.org/jira/browse/PIG-644
> Project: Pig
> Issue Type: Bug
> Components: impl
> Affects Versions: 0.4.0
> Reporter: Viraj Bhat
> Assignee: Daniel Dai
> Fix For: 0.6.0
>
> Attachments: blah.txt, PIG-644-1.patch
>
>
> Consider the following Pig script where we generate column names b and b in
> the FOREACH
> {code}
> DATA = LOAD 'blah.txt' as (a:long, b:long);
> RESULT = FOREACH DATA GENERATE a, b, (b>20?b:0) as b;
> DESCRIBE RESULT;
> dump RESULT;
> {code}
> Pig runs the script successfully and does not complain of the duplicate
> column names. I do not know if the new error handling framework will handle
> these kinds of cases.
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