clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Wrong results: partition pruning drops rows for `modulo` over mixed-sign
- LowCardinality(UInt64) primary key fails UNKNOWN_TYPE with HASHED/CACHE/DIRECT
- Constant ROLLUP/CUBE key not defaulted to NULL on super-aggregate row
- Cascades optimizer rejects LEFT ANY/SEMI/ANTI JOIN with
- `json['key']` fails on `LowCardinality` typed paths and on NULL nullable keys
- Query condition cache salt omits JSON/CSV output-format settings
- RESTORE fails on EmbeddedRocksDB table used as refreshable-MV target
- Trino dialect: shift literals promoted to Int64 instead of 32-bit INTEGER
- Nullable dict key + transform_null_in: declined rewrite loses PK pruning
- Feat(Parser): Add `INSERT ... BY NAME`
- Docs
- C++ not yet supported