[jira] [Commented] (CASSANDRA-5091) Provide a way to sort read results on the coordinator node

["Sylvain Lebresne (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-5091?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14096988#comment-14096988 ] 

Sylvain Lebresne commented on CASSANDRA-5091:
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I'll note that ordering on coordinator and query paging don't play very well at all together so I'm not sure how much we can do here.

> Provide a way to sort read results on the coordinator node
> ----------------------------------------------------------
>
>                 Key: CASSANDRA-5091
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5091
>             Project: Cassandra
>          Issue Type: Wish
>            Reporter: Sergio Bossa
>              Labels: cql
>
> While Cassandra provides a way to scatter/gather queries with secondary indexes, as well as custom secondary indexes implementations, there is currently no way to sort gathered results on the coordinator node, which would be very useful (actually, essential) if the index implementation provides results in sorted order.
> So, what I'm proposing here is a way to provide (custom) sort implementations, which may either be as easy as just adding one more interface and a bunch of method calls, or get a bit more complex by providing an ORDER BY clause in CQL.



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