ClickHouse/.github/ISSUE_TEMPLATE/80_backward-compatibility.md

name	about	title	labels	assignees
Backward compatibility issue	Report the case when the behaviour of a new version can break existing use cases		backward compatibility

(you don't have to strictly follow this form)

Describe the issue A clear and concise description of what works not as it is supposed to.

How to reproduce

• Which ClickHouse server versions are incompatible
• Which interface to use, if matters
• Non-default settings, if any
• CREATE TABLE statements for all tables involved
• Sample data for all these tables, use clickhouse-obfuscator if necessary
• Queries to run that lead to unexpected result

Error message and/or stacktrace If applicable, add screenshots to help explain your problem.

Additional context Add any other context about the problem here.