clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Tuple with Nullable subcolumn serialized back incorrectly
- Add processor memory delta to processors profile log
- `ifNull(col = X, 0)` cannot use PK or skip index (boolean-position ifNull/coalesce wrapper)
- Config Workflow: infer changelog category from PR labels when body parsing fails
- A logically-inert "true AND" wrapper around NOT(has(arr, x) AND arrayJoin(arr) = x) causes 20x+ memory blowup in ARRAY JOIN
- Inequality joins not working with join_use_nulls=1
- Add CHECK TABLE ... REMOTE for lightweight remote storage validation
- Segmentation fault (STID: 0883-3ba9)
- Correlated subquery with `group_by_use_nulls = 1` and `WITH ROLLUP/WITH CUBE` causes logical error
- SIGSEGV in `convertToFullIfConst` / `ReplacingSortedAlgorithm` under high concurrent FINAL on ppc64le (Power11)
- Docs
- C++ not yet supported