v.21.7Improvement
Handle Column Name Clashes for Join Table Engine
Handle column name clashes for Join table engine. Closes #20309. #23769 (Vladimir).Why it matters
This feature addresses the issue of column name clashes when using theJoin table engine, ensuring that columns from joined tables do not conflict or cause ambiguous references. It improves stability and correctness of queries involving joins.How to use it
The feature is applied automatically in theJoin table engine without requiring additional user configuration. Users benefit from reliable join results even when source tables have overlapping column names.