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https://issues.apache.org/jira/browse/SOLR-10292?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15933426#comment-15933426
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ASF subversion and git services commented on SOLR-10292:
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Commit 9738d34fb130924d144c489212c3cc8b915a11d0 in lucene-solr's branch
refs/heads/branch_6x from [~dpgove]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=9738d34 ]
SOLR-10292: Adds CartesianProductStream to turn multivalued fields into
multiple tuples
> Add cartesian Streaming Expression to build cartesian products from
> multi-value fields and text 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
> Attachments: SOLR-10292.patch, SOLR-10292.patch, SOLR-10292.patch,
> SOLR-10292.patch, SOLR-10292.patch
>
>
> 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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