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From "Cassandra Targett (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-8962) Add sort Streaming Expression
Date Fri, 15 Apr 2016 13:05:25 GMT

    [ https://issues.apache.org/jira/browse/SOLR-8962?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15242923#comment-15242923
] 

Cassandra Targett commented on SOLR-8962:
-----------------------------------------

Thanks. I put the section you had written to the page https://cwiki.apache.org/confluence/display/solr/Internal+-+Trunk+Changes+to+Document
so it's not lost forever and we can just put it back for 6.1. Even though that page says "trunk",
I think we could use it for any future feature or functionality you want to write up some
docs for before the Ref Guide is open for that version. 

> Add sort Streaming Expression
> -----------------------------
>
>                 Key: SOLR-8962
>                 URL: https://issues.apache.org/jira/browse/SOLR-8962
>             Project: Solr
>          Issue Type: New Feature
>            Reporter: Joel Bernstein
>            Assignee: Dennis Gove
>            Priority: Critical
>             Fix For: master, 6.1
>
>         Attachments: SOLR-8962.patch, SOLR-8962.patch
>
>
> The sort Streaming Expression does an in memory sort of the Tuples returned by it's underlying
stream. This is intended to be used for sorting sets gathered during local graph traversals.
This will make it easy to gather sets during a traversal and use all of the sort based set
operations (merge, innerJoin, outerJoin, reduce, complement, intersect). 
> This will be particularly useful with the gatherNodes expression (SOLR-8925). Sample
syntax:
> {code}
> intersect(
>        sort(gatherNodes(...), "fieldA asc"),
>        sort(gatherNodes(...), "fieldA asc"),
>        on)
> {code}



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