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From "Alan Gates (JIRA)" <j...@apache.org>
Subject [jira] Updated: (PIG-453) Scope resolution operators in flattened schemas need to be fixed
Date Tue, 21 Sep 2010 22:05:33 GMT

     [ https://issues.apache.org/jira/browse/PIG-453?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alan Gates updated PIG-453:
---------------------------

         Assignee: Alan Gates  (was: Santhosh Srinivasan)
    Fix Version/s: 0.9.0

> Scope resolution operators in flattened schemas need to be fixed
> ----------------------------------------------------------------
>
>                 Key: PIG-453
>                 URL: https://issues.apache.org/jira/browse/PIG-453
>             Project: Pig
>          Issue Type: Bug
>    Affects Versions: 0.2.0
>            Reporter: Santhosh Srinivasan
>            Assignee: Alan Gates
>            Priority: Minor
>             Fix For: 0.9.0
>
>
> Currently, the scope resolution operator :: is stored as part of the field schema alias.
As a result, users may get confused by queries like:
> {code}
> a = load 'st10k' as (name, age, gpa);
> b = group a by name;
> c = foreach b generate flatten(a);
> d = filter c by name != 'fred';
> e = group d by name;
> f = foreach e generate flatten(d);
> g = foreach f generate name;
> {code}
> With PIG-451, the schema for f will have a column with aliases a::name and d::a::name.
The use of d::a::name is particularly confusing.

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