clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Docs: add theme-aware HIPAA onboarding screenshots
- Sparse String columns are expanded one value at a time: build them in one pass (GROUP BY over a mostly-empty String column -10% to -14%, ClickBench Q10 -4%)
- Support parallel parsing of the Avro format
- docs(clickpipes): clarify when a Resource-Share is linked to a reverse private endpoint
- Fix a race in `ZooKeeper::waitForDisappear` that throws `ZNONODE`
- Spread small reads evenly across parallel replicas
- ClickHouse Iceberg Catalog: Add rename table endpoint
- Iceberg: Ignore Parquet columns whose field id is not in table schema
- Reject reading an `EPHEMERAL` column that has the name of a subcolumn of another column
- Use vectorized SipHash in `uniqExact`, `IN` sets and `DISTINCT`, with the same hashes
- Docs
- C++ not yet supported