clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- JOIN ON a.id IS NULL AND b.id IS NULL is optimized, but with AND a.id IS NULL = b.id IS NULL it's not
- Array(DateTime64(N)) CSV parsing fails for unquoted fractional unix timestamp (e.g. "1783585473.954")
- Reintroduce borrowed threadgroup async uaf fix
- Backport #109492 to 25.8: Fix segfault in `largestTriangleThreeBuckets` aggregate function
- Backport #109492 to 26.5: Fix segfault in `largestTriangleThreeBuckets` aggregate function
- DDLWorker hangs on leader-only query when one of the replicas is inactive
- Iceberg out-of-bounds with a materialized view
- Use skip indexes (e.g. bloom_filter) for `arrayJoin(arr) = 'x'` filter conditions via the implied `has(arr, 'x')`
- Optimize mutation loading
- Docs: update redis.md
- Docs
- C++ not yet supported