clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Keep a read with pinned block numbers local in plan-based parallel replicas
- Bound size_decompressed in the compressed frame header
- Extend sharing of prepared sets with automatic parallel replicas probe plan
- Use compensated summation for PromQL sum
- Fix sparse Nullable subcolumn reads from compact parts
- claude: paginate the runbook's check-runs read
- Iceberg with iceberg_use_version_hint=1: remove_orphan_files deletes an acked snapshot's data behind a stale version-hint (permanent data loss)
- Optimize one-argument date conversions on Date and DateTime columns
- Fix nested disk S3 I/O ignoring inner RESOURCE throttler at CachedObjectStorage delegation points
- Reject `arrayJoin` in an `ie_join` JOIN ON condition evaluated during the join
- Docs
- C++ not yet supported