[jira] [Created] (SOLR-10292) Add cartesian Streaming Expression to build cartesian products from multi-value fields

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

Joel Bernstein created SOLR-10292:
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             Summary: Add cartesian Streaming Expression to build cartesian products from multi-value fields
                 Key: SOLR-10292
                 URL: https://issues.apache.org/jira/browse/SOLR-10292
             Project: Solr
          Issue Type: New Feature
      Security Level: Public (Default Security Level. Issues are Public)
            Reporter: Joel Bernstein


Currently all the Streaming Expression such as rollups, intersections, fetch etc, work on single value fields. The *cartesian* expression would create a stream of tuples from a single tuple with a multi-value field. This would allow multi-valued fields to be operated on by the wider library of Streaming Expression.

For example a single tuple with a multi-valued field:

id: 1
author: [Jim, Jack, Steve]

Would be transformed in the following three tuples:

id:1
author:Jim

id:1
author:Jack

id:1
author:Steve












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