v.1.1.54390Improvement
MergeTree format_version.txt file auto-creation upon missing instance
Theformat_version.txtfile forMergeTreetables is re-created if it is missing, which makes sense if ClickHouse is launched after copying the directory structure without files (Ciprian Hacman).
Why it matters
This feature addresses the issue where ClickHouse is started after copying the directory structure ofMergeTree tables without the necessary files, ensuring the missing format_version.txt file is restored and the table functions correctly.How to use it
No manual intervention is required. When ClickHouse detects the absence of theformat_version.txt file in a MergeTree table's data directory at startup, it will automatically recreate the file.