Joel Bernstein created SOLR-16239:
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Summary: Add Join query plans to Solr SQL
Key: SOLR-16239
URL: https://issues.apache.org/jira/browse/SOLR-16239
Project: Solr
Issue Type: New Feature
Security Level: Public (Default Security Level. Issues are Public)
Components: Parallel SQL
Reporter: Joel Bernstein
This is an umbrella ticket for adding join query plans for Solr SQL.
Solr 9 has significant performance improvements to the export handler. These
improvements were done in part to support fast distributed joins in Solr SQL.
Streaming Expressions already supports hash joins and merge joins and has
limited support for nested loop joins (fetch). What needs to be done is to add
Rules to the Calcite planner that pushes the joins down to the SQL handler.
Calcite also has the ability to execute joins so part of this work will also be
to gracefully fall back to the Calcites join engine.
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