clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Do not finalize the client output format into a canceled buffer
- Convert `LEFT ALL JOIN ... WHERE right.key IS NULL` to `LEFT ANTI JOIN`
- Add decimals and 128-bit integers inline in the per-row paths of `sum`
- Correlated subquery returns wrong results when decorrelation evaluates its outer input twice
- Prepare changelog for 26.11
- TTL bound skips value 0: whole-part shortcuts wipe never-expiring data
- NULL-dense nullable GROUP BY/DISTINCT up to 19% slower after #126098
- `isInlineFlagGroup` misses `(?)`: `replaceRegexpAll('xfx', '^(?)?x')` -> Zfx
- replaceRegexpAll wrongly rewrites to single replace for `^(?)?x`
- `LIMIT n BY ALL` keeps aggregate columns as keys with `group_by_use_nulls`
- Docs
- C++ not yet supported