clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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Help out
- Issues
- Support for (scalar) CTE in mutations
- Issue during ReplicatedMergeTreeCleanupThread may lead to replication delays
- StorageMergeTree mutation performance scales badly with batch sizes
- Replacing partition with a non-existent one leads to data loss
- ALTER ... DROP PARTITION KEY
- Request througth gRPC , output in JSON
- How to model a 1:N relationship with aggregation?
- Best approach to implement set operation
- sumMap/minMap/maxMap aggregation optimization for sorted keys
- A query with large amount of UNION ALL may have larger memory usage than someone may expect.
- Docs
- C++ not yet supported