[jira] [Created] (SOLR-7525) Add ComplementStream

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

Joel Bernstein created SOLR-7525:
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             Summary: Add ComplementStream
                 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


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 Complement(streamA, streamB, comp);
{code}

Streaming Expression syntax:

{code}
complement(search(...), search(...), on(...))
{code}

Internal implementation will rely on the ReducerStream.




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