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From "Jonathan Coveney (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PIG-438) Handle realiasing of existing Alias (A=B;)
Date Tue, 21 Feb 2012 22:14:53 GMT

    [ https://issues.apache.org/jira/browse/PIG-438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13213014#comment-13213014
] 

Jonathan Coveney commented on PIG-438:
--------------------------------------

Ah, I thought I had included that.

The old:
{code}
mismatched input 'B' expecting SEMI_COLON
{code}

The new:
{code}
ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1200: <line 1, column 4>  Syntax error,
unexpected symbol at or near 'load'
{code}
                
> Handle realiasing of existing Alias (A=B;) 
> -------------------------------------------
>
>                 Key: PIG-438
>                 URL: https://issues.apache.org/jira/browse/PIG-438
>             Project: Pig
>          Issue Type: Bug
>    Affects Versions: 0.2.0
>            Reporter: Pradeep Kamath
>            Assignee: Jonathan Coveney
>            Priority: Minor
>             Fix For: 0.11
>
>         Attachments: PIG-438.patch
>
>
> We do not handle re-aliasing of an existing alias - this should be handled correctly.
> The following script should work:
> {code}
> a = load 'studenttab10k';
> b = filter a by $1 > '25';
> c = b;
> -- use b
> d = cogroup b by $0, a by $0;
> e = foreach d generate flatten(b), flatten(a);
> dump e
> -- use c
> f = cogroup c by $0, a by $0;
> g = foreach f generate flatten(c), flatten(a);
> dump g;
> {code}

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