clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Simplify the statistics cache
- Check thread never re-adds the part node: it detaches and re-downloads
- Inlined temporary view named by internal `_tmp_<uuid>`, not its visible name
- Streaming reads return wrong `_part_offset` for commit_order projections
- RESTORE fails with FUNCTION_ALREADY_EXISTS when a backup contains a UDF whose name is a built-in in the restoring version
- Keep Keeper sessions alive for local reads on followers
- Select the CRoaring set-bit extraction kernel at runtime in `BSINumericIndexedVector`
- Perf(Analyzer): prune Map keys for mapContainsValue when full Map is selected
- DateTime64 IN throws DECIMAL_OVERFLOW for an unrepresentable scale-widened set element
- Add bucketed TimeSeries samples and bounded native PromQL execution
- Docs
- C++ not yet supported