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https://issues.apache.org/jira/browse/SOLR-18441?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Smiley resolved SOLR-18441.
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Fix Version/s: 10.1
Resolution: Fixed
> Add Global Ordinals Join Query Parser (`{!globalOrdinalsJoin}`) for
> single-index, single-field joins
> ----------------------------------------------------------------------------------------------------
>
> Key: SOLR-18441
> URL: https://issues.apache.org/jira/browse/SOLR-18441
> Project: Solr
> Issue Type: New Feature
> Reporter: Mikhail Khludnev
> Assignee: Mikhail Khludnev
> Priority: Major
> Labels: pull-request-available
> Fix For: 10.1
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Implement a new Query Parser plugin for Solr that brings Lucene's JoinUtil
> global ordinals join capability. This feature enables efficient query-time
> joins within a single index using global ordinals over a shared single-valued
> string docValues field.
> Use Cases:
> Join parent-child document relationships using global ordinals for better
> performance than traditional joins
> Support bidirectional joins (from parent to child, and child to parent)
> Enable score mode selection (None, Avg, Max, Min, Total) for join result
> scoring
> Scope: This implementation is limited to:
> Single index (joins within the same index)
> Single field (both "from" and "to" sides join on the same field)
> String docValues fields (single-valued only)
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