v.21.8Improvement
Support for Materialized and Aliased Columns in JOIN
Support materialized and aliased columns in JOIN, close #13274. #25634 (Vladimir C).
Why it matters
Previously, materialized and aliased columns could not be referenced inJOIN conditions or clauses, limiting query expressiveness. This feature addresses that limitation, allowing users to leverage computed or shorthand columns directly in join operations, enhancing query capability and simplifying complex data retrieval tasks.How to use it
Users can directly reference materialized or aliased columns inJOIN clauses just like regular columns without requiring workarounds. No special configuration is needed; simply write joins that include these columns in the ON or USING parts of the JOIN statement.