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Posted to dev@pig.apache.org by "Jin Sun (JIRA)" <ji...@apache.org> on 2017/04/03 16:45:42 UTC

[jira] [Updated] (PIG-5211) Optimize Nested Limited Sort

     [ https://issues.apache.org/jira/browse/PIG-5211?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jin Sun updated PIG-5211:
-------------------------
    Attachment: PIG-5211-1.patch

[WIP] This is a draft. Wait for comments.

> Optimize Nested Limited Sort
> ----------------------------
>
>                 Key: PIG-5211
>                 URL: https://issues.apache.org/jira/browse/PIG-5211
>             Project: Pig
>          Issue Type: Improvement
>            Reporter: Jin Sun
>            Assignee: Jin Sun
>             Fix For: 0.17.0
>
>         Attachments: PIG-5211-1.patch
>
>
> Currently in FOREACH clause, if both LIMIT and ORDER BY are present, pig stores all elements and sort them. It should use a priority queue to be more efficient in space. 



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