clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- mapPopulateSeries 1.6x slower on sorted keys: std::pair skips driftsort
- Remove SerializationSettings::serialize_string_with_zero_byte
- `Pretty` throws `AMBIGUOUS_COLUMN_NAME`: flattened header rejects reused names
- `Pretty` width probe capped at 1000 bytes: values uncut, grid too narrow
- 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
- Docs
- C++ not yet supported