v.21.4Improvements
Support More Cases for Rewriting CROSS JOIN to INNER JOIN
Support more cases to rewriteCROSS JOINtoINNER JOIN. #20392 (Vladimir).
Why it matters
This feature improves query optimization by enabling the query engine to convertCROSS JOIN operations into more efficient INNER JOIN when applicable, reducing computational overhead and improving execution performance.How to use it
Users benefit from this optimization automatically when writing queries withCROSS JOIN; no additional configuration is needed. The query planner will detect eligible cases and rewrite the join accordingly during query execution.