clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Optimize single-element IN to equality comparison
- DeltaLake read from S3 fails with DELTA_KERNEL_ERROR in ClickHouse 26.2.4 after ~110M rows, works in 25.7
- LOGICAL_ERROR (Code 49): Found patch part intersects mutation with version [ID] (Mutation ID missing from system.mutations)
- system.settings from field
- compromised password invalidation
- sumCountIf and sumCountDistinct serialization compatibilityafter Nullable(Tuple) introduction (follow-up to #97502)
- clickhouse-disks doesn't delete blobs from object storage
- Drop of a JSON column runs for hours re-writing everything
- Use `llvm-project` 22.1.1
- Lazily apply selector and replication indexes in join with selective limit
- Docs
- C++ not yet supported