clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix signed integer overflow in refreshable materialized view retry backoff
- Allow low cardinality types in iceberg and improve perfomance of low cardinality in parquet
- Reapply "Make `postgresql` and `PostgreSQL` engine work against a ClickHouse instance", with a fix for the cancel-request logical error
- 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
- Docs
- C++ not yet supported