[jira] [Commented] (SOLR-7525) Add ComplementStream to the Streaming API and Streaming Expressions

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

    [ https://issues.apache.org/jira/browse/SOLR-7525?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15052115#comment-15052115 ] 

Joel Bernstein commented on SOLR-7525:
--------------------------------------

Ah, I didn't realize there was already a patch for this. I can add the parallel tests tomorrow.

> Add ComplementStream to the Streaming API and Streaming Expressions
> -------------------------------------------------------------------
>
>                 Key: SOLR-7525
>                 URL: https://issues.apache.org/jira/browse/SOLR-7525
>             Project: Solr
>          Issue Type: New Feature
>          Components: SolrJ
>            Reporter: Joel Bernstein
>            Priority: Minor
>         Attachments: SOLR-7525.patch
>
>
> This ticket adds a ComplementStream to the Streaming API and Streaming Expression language.
> The ComplementStream will wrap two TupleStreams (StreamA, StreamB) and emit Tuples from StreamA that are not in StreamB.
> Streaming API Syntax:
> {code}
> ComplementStream cstream = new ComplementStream(streamA, streamB, comp);
> {code}
> Streaming Expression syntax:
> {code}
> complement(search(...), search(...), on(...))
> {code}
> Internal implementation will rely on the ReducerStream. The ComplementStream can be parallelized using the ParallelStream.



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