clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix a hang of `INSERT ... SELECT` and `WITH RECURSIVE` queries in a CPU workload
- Hybrid materialized view: incremental on INSERT, scheduled full refresh after UPDATE/DELETE
- UNIQUE KEY top-K shortlist ignores delete bitmap, ORDER BY LIMIT loses rows
- Make native Parquet independent of the Arrow library and enable it in the fast test
- Delta Lake: `WHERE` on a `binary` column fails with `Invalid comparison operation: BinaryView <= Utf8View` (`DELTA_KERNEL_ERROR`)
- Server-wide hang after `DROP WORKLOAD` with split MASTER/WORKER CPU resources
- Different SELECT expressions with the same output label are rejected
- Apply `-WithMemoryTracking` containers to `src/Processors/Formats`
- hasAll/hasAny on short arrays scan fully with no early exit on ARM
- Fix hangs of distributed `INSERT`, `GLOBAL IN` / `GLOBAL JOIN` and `file()` reads in a workload with few CPU slots
- Docs
- C++ not yet supported