clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Connection pools for table functions: remote, mysql, url, odbc.
- Query optimization for GROUP BY with ORDER BY keys and LIMIT.
- Excessive connections when using foreign tables.
- Parallel execution of IN query using Distributed table
- Forbid materialized view creation on engines that does not support inserts/MV
- Log message for 'Connection reset by peer' could be improved
- Protection from inconsistent ZooKeeper clusters.
- Usability issue with custom partitions and wrong ATTACH query.
- Kafka engine information in systems table/logging level kafka engine
- Add table engine with auto deduplication by key for realtime
- Docs
- C++ not yet supported