clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Make GraceHashJoin repartitioning targeted, skew-resilient
- Add system table with query ids of the current session
- [RFC][Draft] Workloads that respect server limits
- Spill interface for spillable joins
- [RFC][Draft] CPU reservations
- Add aiFilter for natural-language boolean filtering via LLMs.
- Experiment: compression codecs with separate dictionaries.
- Parsers: make normalizedQueryHash fold signs in literal lists like normalizeQuery
- Support Prometheus-compatible monotonicity repair in quantilePrometheusHistogram
- Fix logical error in optimize_or_like_chain with aggregate/window function on LIKE LHS
- Docs
- C++ not yet supported