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28 lines
914 B
Markdown
28 lines
914 B
Markdown
---
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name: Backward compatibility issue
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about: Report the case when the behaviour of a new version can break existing use cases
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title: ''
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labels: backward compatibility
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assignees: ''
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---
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(you don't have to strictly follow this form)
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**Describe the issue**
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A clear and concise description of what works not as it is supposed to.
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**How to reproduce**
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* Which ClickHouse server versions are incompatible
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* Which interface to use, if matters
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* Non-default settings, if any
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* `CREATE TABLE` statements for all tables involved
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* Sample data for all these tables, use [clickhouse-obfuscator](https://github.com/ClickHouse/ClickHouse/blob/master/programs/obfuscator/Obfuscator.cpp#L42-L80) if necessary
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* Queries to run that lead to unexpected result
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**Error message and/or stacktrace**
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If applicable, add screenshots to help explain your problem.
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**Additional context**
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Add any other context about the problem here.
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