clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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Help out
- Issues
- Support classic PromQL histogram_quantile
- Support PromQL count_values
- Support PromQL absent functions
- Align PromQL scalar, timestamp, and clamp lowering
- `groupConcat` skips delimiters when leading elements are empty strings due to `data_size != 0` check
- Validate PromQL selector regex matchers
- Cover PromQL special values in binary operators
- Add SQLite input/output format
- `getMinMaxCountProjection` incorrectly returns swapped min/max when explicit PRIMARY KEY is used with DESC ORDER BY
- Tables with positional-argument projections cannot be attached when `enable_positional_arguments_for_projections=false` because ATTACH uses global context, ignoring session settings
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- C++ not yet supported