clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- IEJoin picks wrong key pair when a band column has NULLs
- MarkCache: single global mutex serialises concurrent cache hits under high-QPS point lookups
- Allow disabling process creation in the seccomp allowlist
- Feat(Map): Add `mapPick`
- Unified cardinality estimation across join order, distributed and Cascades planners
- Fix parallel replicas mixing updated and not updated rows when replicas have different patch parts or pending mutations
- Bad quality of documentation search
- Fix input-order dependency in windowFunnel with strict_deduplication and strict_once
- Delta lake data files prefetch
- make transaction commit wait killable
- Docs
- C++ not yet supported