clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Massive slowdown when simply including a (large) column in the result
- Support composite keys in Join Engine
- Implement Rate Limiting on OPTIMIZE operation
- Correlated subqueries
- Error DDL task .. contains current host in cluster , but there are no such cluster here
- Misleading 'Timeout exceeded' for OPTIMIZE TABLE
- Query optimization for GROUP BY with ORDER BY keys and LIMIT.
- Parallel execution of IN query using Distributed table
- Log message for 'Connection reset by peer' could be improved
- Add table engine with auto deduplication by key for realtime
- Docs
- C++ not yet supported