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https://issues.apache.org/jira/browse/SOLR-10292?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15929350#comment-15929350
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Dennis Gove edited comment on SOLR-10292 at 3/17/17 2:36 AM:
-------------------------------------------------------------
I'm not a huge fan of the function name, but feature-wise I think this would be
good.
{code}
cartesian(
<stream>,
by="field1,field2",
sort="field1 ASC"
)
{code}
1. Supports any incoming stream
2. Allows you to do the product over multiple fields
3. Allows you to indicate a sort order for the new tuples, if not provided will
default to incoming order of values in by fields
4. If a non-array exists in the by fields then this will just return that
single tuple, no need to error out. Allows for fields where a mixture of multi
and single valued exist.
Anything I'm missing?
was (Author: dpgove):
I'm not a huge fan of the function name, but feature-wise I think this would be
good.
{code}
cartesian(
<stream>,
by="field1,field2",
sort="field1 ASC"
)
{code}
1. Supports any incoming stream
2. Allows you to do the product over multiple fields
3. Allows you to indicate a sort order for the new tuples, if not provided will
default to incoming order of values in by fields
Anything I'm missing?
> 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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