clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Problems with MaterializedPostgreSQL to Neon (LakeBase)
- Clarity Around CoalescingMergeTree And Nullable Columns
- A number of merge events is inflated
- ClickHouseMetrics_VersionInteger metric in http://nameVM:9363/metrics does not show the version for clickhouse-keeper
- Async CPU metrics values are unexpected after upgrading to ClickHouse 25.5.x
- Logical error: '(isConst() || isSparse()) ? getDataType() == rhs.getDataType() : typeid(*this) == typeid(rhs)' with window function
- Query condition cache on disk
- [CI crash] FilterTransform initialization failure in query pipeline
- [CI crash] Error during dropping queue metadata
- Implement Vamana for ANN Vector Search (much faster than HNSW)
- Docs
- C++ not yet supported