clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix input empty as default for nullable string field in CSV InputFormat
- KeyCondition should analyze `pointInPolygon` function to utilize minmax indices.
- Query cache on disk (RFC)
- Insert + select from parquet + array join => Doesn't recognise column names
- Suggestion for improving usability of TTL Group By
- Include initial_user and initial_query_id from initiator replica to other replicas in distributed queries
- UDF with subquery does not working with columns
- max_distributed_connections and distributed_connections_pool_size behavior
- Hung check: Query stuck reading from s3
- [Draft] Not That Trivial Resharding (basic infrastructure)
- Docs
- C++ not yet supported