clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Query cache on disk, backed by the filesystem cache
- Wait for the worker cleanup before force-killing the test workers
- Push down `LIMIT` in external database queries
- Support the short ATTACH syntax for views
- Implement FIFO admission queue with per-waiter wakeup for ProcessList
- Add `max_tables` database setting for `Atomic` and `Ordinary`
- Record an index's absent columns when materializing it on a wide part
- Enforce settings constraints on nested SETTINGS and SET name = DEFAULT
- Record the read wait-for-write span and histogram in the new Keeper dispatcher
- Bound submodule cache population so it cannot kill the Config Workflow job
- Docs
- C++ not yet supported