clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- `decrefColumnsDescriptionForColumns` never evicts cache entries for tables with Nested columns due to wrong `use_count` threshold
- Support lazy materialization for LIMIT BY queries
- `wrapWithSelectOrderBy` breaks all `SELECT FROM VIEW` queries when `inject_random_order_for_select_without_order_by` is enabled
- `TextIndexPostingsCacheMisses` ProfileEvent has double 'a' typo in description
- setting/limit on how much single chunk can "expode" in row numbers
- Logical error: Not-ready Set is passed as the second argument for function 'A (STID: 0250-44b3)
- Logical error: 'parameters == nested_func->getParameters()' (STID: 2508-495a)
- Flaky test: 00909_kill_not_initialized_query
- `EXPLAIN PIPELINE` renders interleaved processors as a nested tower instead of grouping them
- Lost Const column type for result replicate function
- Docs
- C++ not yet supported