clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Iceberg decimal min/max pruning drops rows when bound exceeds declared precision
- Plan-based parallel replicas undercount aggregates with GROUP BY LIMIT
- Parallel-parsing total-tracker drift test left on per-tick correction
- HTTP path-style requests can't read session temporary tables (UNKNOWN_TABLE)
- `--ignore-error` batch cut short by a receive timeout now exits 0
- Async insert fails QUOTA_REQUIRES_CLIENT_KEY under KEYED BY client_key quota
- INSERT with use_legacy_to_time = 1 writes legacy toTime values into a Time key: wrong results, LOGICAL_ERROR in debug builds
- `distinctJSONPaths(j) OVER (...)` drops its window: one row, wrong paths
- CSV first field loses leading whitespace with variable column count enabled
- `APPLY(arrayJoin)` slips past projection check: inserts hit `LOGICAL_ERROR`
- Docs
- C++ not yet supported