Mikhail Khludnev created SOLR-18441:
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Summary: 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
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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