clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Many monotonic functions do not declare monotonicity, so `KeyCondition` cannot prune through them (`addDays`, `dateDiff`, `sqrt`/`exp`/`log`, `formatDateTime`, `toWeek`, `*OrDefault`, `greatest`/`least`, ...)
- `DateTime +/- INTERVAL n MONTH|YEAR` is not actually monotonic due to day clamping
- Password prompts (on install and in the client) shouldn't take ANSI escape sequences
- Fix CPU-slot acquisition latency and add ResourceRequest tracing (#11…
- Add custom http headers to AI named collections
- Feat(Array): Add `arrayInsert` function
- Add stateless tests for Delta Lake writes
- PoolBase::get marks a slot in_use before allocObject, leaking it on throw
- Slow unkillable query
- `SYSTEM START VIEW` through an alias does not resume a refreshable materialized view
- Docs
- C++ not yet supported