clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Support the Vortex file format
- Convert the JOIN keys to the type of the values that they have in common
- Improve canceling queries with the `url` function
- Keep Iceberg statistics for supported columns when a field type is unsupported
- Fix BACKUP/RESTORE SETTINGS <name> = DEFAULT parsing and formatting
- Reject a table reference in the IN operator of a constraint expression
- Reimplement the KQL (Kusto) dialect on a lexer, an AST and AST translation
- Make array membership functions compare a constant `FixedString` needle zero-padded
- Do not merge an equality into a JOIN condition if its value depends on where it is evaluated
- Fix a query being cancelled up to 1 ms before its `max_execution_time`
- Docs
- C++ not yet supported