v.21.12Experimental Features

Drop Ordinary Database Support for MaterializedMySQL

Official CH changelog text
Drop support for using Ordinary databases with MaterializedMySQL. #31292 (Stig Bakken).
Dropped support for using Ordinary databases with MaterializedMySQL engine.

Why it matters

This change removes the ability to use Ordinary databases in conjunction with the MaterializedMySQL engine to streamline support and avoid inconsistencies, improving stability and clarity of database engine interactions.

How to use it

Users should no longer create or use Ordinary databases when working with the MaterializedMySQL engine. Instead, use supported database types compatible with MaterializedMySQL.

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