[jira] [Updated] (SOLR-8936) Push down the DISTINCT operation into the /export handler, to support exporting distinct edges during a graph traversal

["Cassandra Targett (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-8936?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Cassandra Targett updated SOLR-8936:
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    Component/s: streaming expressions

> Push down the DISTINCT operation into the /export handler, to support exporting distinct edges during a graph traversal
> -----------------------------------------------------------------------------------------------------------------------
>
>                 Key: SOLR-8936
>                 URL: https://issues.apache.org/jira/browse/SOLR-8936
>             Project: Solr
>          Issue Type: New Feature
>          Components: streaming expressions
>            Reporter: Joel Bernstein
>            Priority: Major
>             Fix For: 6.2, 7.0
>
>
> The /export handler sorts all results by specified fields as it streams out results. We can use the sort order to perform a reduce style distinct operation as docs are being sent out.
> This can be used in the SQL handler, effectively removing the need for map_reduce mode SELECT DISTINCT operations.
> But the primary driver for this is to export distinct edges during a graph traversal, which will eliminate a huge amount of network traffic during large traversals.



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