clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Reject duplicate names in CTE and table expression column alias lists
- `Alias` table engine leaks a target's schema and row count to a user with no grant on it (metadata access-control bypass)
- Do not erase the source column of a filter deferred after FINAL
- Lazy-load part-level column statistics
- Logical error: Invalid number of columns in chunk pushed to OutputPort. Expected A, found B (STID: 2270-3258)
- Fix join NDV propagation for distributed aggregation
- Support quoted PromQL grouping labels
- Fix DPsub join reordering silently dropping single-table ON-clause filters
- Logical error: 'std::exception. Code: 1001, type: std::out_of_range, e.what() = unordered_map::at: key not found (version 26.8.1.1), Stack trace: (STID: 2508-3132)
- Add a `string_bounds` column statistic for String columns
- Docs
- C++ not yet supported