clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Iceberg: 'c.null' subcolumn missing for schema-evolved column when optimize_functions_to_subcolumns=1 (default)
- Vector search: rewrite PREWHERE cosineDistance() to reference the _distance virtual column instead of disabling the no-rescoring optimization
- Support complex type
- Support Nullable(Array)
- Logical error: Block structure mismatch in A stream: different names of columns: (STID: 0993-2385)
- Logical error: Expected one block from input stream (STID: 4569-3618)
- Push LIMIT into aggregation-in-order for early termination
- Add setting join_runtime_filter_min_probe_rows
- Fix `NOT_FOUND_COLUMN_IN_BLOCK` in `query_plan_convert_join_to_in` with `arrayJoin` JOIN key
- Add test for reading invalid RMV during restore
- Docs
- C++ not yet supported