clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Make Ctrl+C terminate the output of a result set in the client promptly
- Fix groupConcat behaviour on empty strings
- Harden `ThreadStatus::attachToGroupImpl` against partial attachment failures
- Fix wrong column order in distributed queries with ALIAS columns
- KeeperStorage refactoring
- 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
- Docs
- C++ not yet supported