v.25.11Improvement

Fix incorrect code

Official CH changelog text
Fix incorrect code in the Backup database engine when it can generate an invalid query with SHOW CREATE DATABASE or when querying engine_full from system.databases. Closes #89477. #89341 (Alexey Milovidov).
Fixed the Backup database engine to correctly generate queries for SHOW CREATE DATABASE and when querying engine_full from system.databases.

Why it matters

The update resolves issues where the Backup engine could produce invalid SQL queries, improving metadata retrieval commands for database inspection and management. This ensures accurate reflection of backup engine configurations and reliable system table queries.

How to use it

Users do not need to change their workflow; the fix is applied internally. After updating to the fixed version, commands like SHOW CREATE DATABASE <database> and querying engine_full from system.databases will work properly for databases using the Backup engine.

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