clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Serialize fixed-size aggregate states in bulk
- Fix MergeTreeSetIndex reporting a match for an out-of-domain range boundary
- Make arrayDistinct do a single hash lookup per element
- Allowlist the expected FileLog bad-path reattach error in the upgrade check
- Normalize open range bounds only for integer key types
- OR-equality-chain-to-IN rewrite folds parseDateTimeBestEffort to a DateTime literal that parallel replicas cannot re-parse against a Date column (TYPE_MISMATCH)
- Drop stale totals and extremes ports in MergingAggregatedStep
- Report why the stress script failed, not just its exit code
- DeltaLake: Unsupported Variant data type (NOT_IMPLEMENTED) when reading Delta tables with VARIANT columns
- Fix logical error for RIGHT JOIN with parallel replicas
- Docs
- C++ not yet supported