[
https://issues.apache.org/jira/browse/SOLR-10292?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Dennis Gove updated SOLR-10292:
-------------------------------
Attachment: SOLR-10292.patch
Implements everything except the read() function.
Expression is
{code}
cartesian(
<stream>,
<fieldName | evaluator> [as newName],
<fieldName | evaluator> [as newName],
[productSort="how to order new tuples"
)
{code}
1. Will create a tuple for each value in the field, and return in the order the
values appear in the field
{code}
cartesian(
<stream>,
multivaluedField
)
{code}
2. Will create a tuple for each value in the field, and return in the order of
the ascending order of the values in the field
{code}
cartesian(
<stream>,
multivaluedField,
productSort="multivaluedField ASC"
)
{code}
3. Will create a tuple for each value in the evaluated expression, putting the
value in the same fieldName, and return new tuples in ascending order of the
evaluated values
{code}
cartesian(
<stream>,
sentence(fieldA) as fieldA,
productSort="fieldA ASC"
)
{code}
4. Will create a tuple for each value in evaluated regex and sentence
{code}
cartesian(
<stream>,
sentence(fieldA) as newField,
regexGroups(fieldB, "some regex expression generating groups") as fieldB
productSort="fieldB ASC, newField DESC"
)
{code}
> 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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