v.24.6Improvement

Remove Importance of allow_experimental_join_condition Mark to Enable Distributed Queries

Official CH changelog text
Remove mark of allow_experimental_join_condition as important. This mark may have prevented distributed queries in a mixed versions cluster from being executed successfully. #65008 (Nikita Mikhaylov).
The allow_experimental_join_condition setting is no longer marked as important to improve distributed query execution compatibility in mixed-version ClickHouse clusters.

Why it matters

Previously, the importance mark on allow_experimental_join_condition could prevent distributed queries from executing successfully in clusters running different ClickHouse versions. Removing this mark resolves that issue, enhancing cluster stability and query reliability.

How to use it

No user action is required. The change removes the 'important' mark from the allow_experimental_join_condition setting internally to allow distributed queries to run smoothly in mixed-version clusters.

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