clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Text index: support arbitrary `LIKE` patterns with `tokenizer = 'array'`
- Add LIKE/NOT LIKE/ILIKE filtering to SHOW access entity statements
- [RFC] Add a `histogram(N)` column statistic for range predicate selectivity
- 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
- Docs
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