clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Add MemoryThreadStacks* async metrics for pthread stack accounting
- Fix Logical error on OPTIMIZE PARTITION for Time-typed partition key
- Vectorize arrayNorm with runtime CPU dispatch
- More fuzzing features
- Add pcodec (PCO) compression codec
- Recognize internal `_CAST` in KeyCondition trivial-cast stripping
- Support EXTRACT(TIMEZONE_HOUR/MINUTE ...) and EXTRACT(... FROM INTERVAL ...)
- Support iceberg v2
- Remove `library` dictionary source
- MergeTree bulk ingest temporarily uses 2–3x disk space during background merges — is there any way to reduce or avoid this overhead?
- Docs
- C++ not yet supported