clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Lazy column loading does not work with `if` and CTEs
- Selecting S3 metadata using s3() functions is very slow due to unnecessary reads on data files
- [Umbrella] Enhancements for correlated subqueries support
- MULTIPLE_EXPRESSIONS_FOR_ALIAS alias clash between column name alias and table name alias
- <Error> executeQuery: Code: 999. Coordination::Exception: ... node doesn't exist. (KEEPER_EXCEPTION) (version 24.1.1.2048 (official build))
- Client behaves unexpectedly if you paste SQL with endline after semicolon
- partial function application and function pipelining
- IN clause with CTE and replicated table with 1 shard fails
- Compressed dictionaries inside of LowCardinality. WIP
- [Draft] Integration with XGBoost and LightGBM
- Docs
- C++ not yet supported