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https://issues.apache.org/jira/browse/SOLR-7525?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dennis Gove updated SOLR-7525:
------------------------------
    Attachment: SOLR-7525.patch

Includes both ComplementStream and IntersectStream. All tests pass.

> 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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