v.21.1Improvements

Apply ALTER TABLE ON CLUSTER to All Replicas

Official CH changelog text
Apply ALTER TABLE <replicated_table> ON CLUSTER MODIFY SETTING ... to all replicas. Because we don't replicate such alter commands. #18789 (Amos Bird).
Enable applying ALTER TABLE <replicated_table> ON CLUSTER MODIFY SETTING ... commands to all replicas in a replicated table.

Why it matters

Replicated tables in ClickHouse previously did not propagate ALTER TABLE MODIFY SETTING commands across all replicas automatically. This feature solves that by ensuring such setting modifications are consistently applied cluster-wide, maintaining configuration uniformity and reducing manual administrative efforts.

How to use it

Use the ALTER TABLE <replicated_table> ON CLUSTER MODIFY SETTING ... command as usual. The system will now automatically apply the setting changes to all replicas of the specified replicated table on the cluster.

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