clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- ClickHouse Lacks Basic Heuristic Rules for Cardinality Estimation: Poor Join Order Choice with LIKE Predicates
- WHERE int_index_column > float64 disable partition and primary key index search
- Distributed table engine does not recognize virtual column `_partition_value`
- Print invisible characters in Vertical format
- 02177_issue_31009 fails: Timeout! Killing process
- Row-based sampling via geometric distribution
- Add Support for Clickhouse Password to be fetched from AWS Secret Manager
- Issue after modifying TTL with S3 + Zero-Copy Replication: "NOT_ENOUGH_SPACE" error despite available disk space
- Enhance the NATS table engine to store credentials in cloud storage.
- `clickhouse-local` creates ~500 threads in `BackgroundSchedulePool`
- Docs
- C++ not yet supported