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

["Joel Bernstein (JIRA)" <ji...@apache.org>]

Joel Bernstein created SOLR-8936:
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             Summary: 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
            Reporter: Joel Bernstein


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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