clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Build with `-fsanitize=return` in trap mode
- System log flushes use memory overcommit instead of failing at the server memory limit
- ExecutablePool returns stale reply after LIMIT 0 / WHERE 1=0 query
- Rebuild projections that compute from a column whose type `MODIFY COLUMN` changes
- Reject `input` in `INSERT ... RETURNING`
- Add `arrayTreePreorder` function
- Interpret `DateTime` literals of a table `TTL` in the session time zone
- Cached join stats pick `hash` over `parallel_hash` on repeat runs, losing parallelism after remote reads
- Make 05302_json_shared_typed_paths_parts independent of hashed part file names and run it on macOS again
- Throttle the GLOBAL IN subquery of `02916_glogal_in_cancel` and run it on macOS again
- Docs
- C++ not yet supported