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Posted to dev@lucene.apache.org by "Joel Bernstein (JIRA)" <ji...@apache.org> on 2017/03/17 18:16:41 UTC
[jira] [Comment Edited] (SOLR-10292) Add cartesian Streaming
Expression to build cartesian products from multi-value fields and text
fields
[ https://issues.apache.org/jira/browse/SOLR-10292?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15930412#comment-15930412 ]
Joel Bernstein edited comment on SOLR-10292 at 3/17/17 6:15 PM:
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We could skip the productSort all together and rely on the sort() expression.
Patch looks great. Looks like we just need to implement a few cartesian evaluators. Regex might be the easiest place to start as it doesn't rely on an analyzer.
was (Author: joel.bernstein):
We could skip the productSort all together and rely on the sort() expression.
Patch looks great. Looks like we just need to implement a few cartesian evaluators. Regex might be the easiest place to start.
> 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
>
>
> 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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