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https://issues.apache.org/jira/browse/PIG-972?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Olga Natkovich updated PIG-972:
-------------------------------
Release Note:
In the earlier version of Pig, describe could only be applied to outer
relations. With Pig 0.8.0, describe could also be applied to the relations
defined in nested foreach.
Example:
grunt> A = load 'studentab10k' as (name, age, gpa);
grunt> B = group A by name;
grunt> C = foreach B {
>> D = distinct A.age;
>> generate COUNT(D), group;}
grunt> describe C::D;
D: {age: bytearray}
Note that you access the inner relation via the outer one using :: operator.
> Make describe work with nested foreach
> --------------------------------------
>
> Key: PIG-972
> URL: https://issues.apache.org/jira/browse/PIG-972
> Project: Pig
> Issue Type: Improvement
> Reporter: Olga Natkovich
> Assignee: Aniket Mokashi
> Fix For: 0.8.0
>
> Attachments: NestedDescribeFinale.patch, NestedDescribeFinale1.patch,
> NestedDescribeProp1.patch, NestedDescribeProp2Initial.patch
>
>
> Currently Parser can't deal with that. This is because describe is part of
> Grunt parser while the rest of nested foreach is handled by the QueryParser
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