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https://issues.apache.org/jira/browse/PIG-4721?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daniel Dai updated PIG-4721:
----------------------------
Attachment: PIG-4721.patch
> IsEmpty documentation error
> ---------------------------
>
> Key: PIG-4721
> URL: https://issues.apache.org/jira/browse/PIG-4721
> Project: Pig
> Issue Type: Bug
> Components: documentation
> Affects Versions: 0.15.0
> Reporter: Nathan Smith
> Priority: Trivial
> Attachments: PIG-4721.patch
>
>
> http://pig.apache.org/docs/r0.15.0/func.html#isempty
> The documentation example uses a left outer join, but this produces a flat
> tuple, which is invalid for IsEmpty. I believe the example in the docs should
> be:
> {code}
> SSN = load 'ssn.txt' using PigStorage() as (ssn:long);
> SSN_NAME = load 'students.txt' using PigStorage() as (ssn:long,
> name:chararray);
> /* do a cogroup of SSN with SSN_Name */
> X = COGROUP SSN by ssn, SSN_NAME by ssn;
> /* only keep those ssn's for which there is no name */
> Y = filter X by IsEmpty(SSN_NAME);
> {code}
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