v.21.7Improvement

ClickHouse MaterializeMySQL Now Preserves MySQL Column Comments

ClickHouse database created with MaterializeMySQL (it is an experimental feature) now contains all column comments from the MySQL database that materialized. #25199 (Storozhuk Kostiantyn).
ClickHouse's MaterializeMySQL database now imports and retains all column comments from the source MySQL database.

Why it matters

This feature ensures that when users create a ClickHouse database using MaterializeMySQL, all column comments from the original MySQL schema are preserved. This helps maintain schema documentation consistency and improves clarity for users interacting with the materialized tables.

How to use it

When using the experimental MaterializeMySQL feature to create a ClickHouse database, column comments from the MySQL source are automatically included without additional configuration.