clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- 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
- Stop and start merges, moves, TTLs and views in stress tests (merging when the CI gets green)
- `PREWHERE <bare column>` with `FINAL` throws THERE_IS_NO_COLUMN when PREWHERE is deferred after FINAL
- Optimize merges of the text index
- Use actual codec to estimate compressed column sizes for dataflow statistics
- Fix stale MATERIALIZED column values read through a chain while a mutation is pending
- Fix NO_SUCH_COLUMN_IN_TABLE naming a column absent from the table when a part's columns were all renamed or all dropped
- Add `/dialect`, `/lang`, `/language` client commands
- Docs
- C++ not yet supported