Dennis Gove created SOLR-8198:
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Summary: Change ReducerStream to use StreamEqualitor instead of
StreamComparator
Key: SOLR-8198
URL: https://issues.apache.org/jira/browse/SOLR-8198
Project: Solr
Issue Type: Improvement
Components: SolrJ
Reporter: Dennis Gove
Priority: Minor
Currently the ReducerStream uses a StreamComparator to determine whether tuples
are equal. StreamEqualitors are a simplified version of a comparator in that
they do not require a sort to be provided. Using the function getStreamSort we
are still able to validate the incoming stream's sort and pass that on up to
any parent stream which might require it.
This will simplify the use of the ReducerStream in join scenarios where the
reducer is used to find like records. Such a scenario exists with Inner/Outer
JoinStream, ComplementStream, and [Outer]HashJoinStreams.
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