--- name: Bug report about: Wrong behavior (visible to users) in the official ClickHouse release. title: '' labels: 'potential bug' assignees: '' --- > You have to provide the following information whenever possible. **Describe what's wrong** > A clear and concise description of what works not as it is supposed to. > A link to reproducer in [https://fiddle.clickhouse.com/](https://fiddle.clickhouse.com/). **Does it reproduce on recent release?** [The list of releases](https://github.com/ClickHouse/ClickHouse/blob/master/utils/list-versions/version_date.tsv) **Enable crash reporting** > If possible, change "enabled" to true in "send_crash_reports" section in `config.xml`: ``` <send_crash_reports> <!-- Changing <enabled> to true allows sending crash reports to --> <!-- the ClickHouse core developers team via Sentry https://sentry.io --> <enabled>false</enabled> ``` **How to reproduce** * Which ClickHouse server version to use * 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](https://github.com/ClickHouse/ClickHouse/blob/master/programs/obfuscator/Obfuscator.cpp#L42-L80) if necessary * Queries to run that lead to unexpected result **Expected behavior** > A clear and concise description of what you expected to happen. **Error message and/or stacktrace** > If applicable, add screenshots to help explain your problem. **Additional context** > Add any other context about the problem here.