clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Duplicates on RIGHT JOIN with Values table and `parallel_replicas_local_plan=0` (Parallel replicas)
- Double any left join with Join table. Cannot parse string. Parallel replicas
- Unsupported JOIN keys of type keys256 in StorageJoin. Storage Join + Parallel replicas
- Cannot convert type UInt8 to Variant(String, UInt64). Parallel replicas variant type conversion
- Add nghttp/2 library and implement simple HTTP/2 server
- UInt128 values are ignored in SELECT queries
- Alter freeze with transactions CANNOT_OPEN_FILE error
- Logical error: Part ... intersects previous part.... It is a bug or a result of manual intervention
- LOGICAL_ERROR: ColumnUnique can't contain null values (Analyzer + group_by_use_nulls)
- Insert resource limitation based on available memory
- Docs
- C++ not yet supported