clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- 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.
- If query contains ridiculous amount of UNION ALL, the pipeline can be suboptimal.
- LIMIT pushdown to UNION ALL queries
- Pressing Ctrl+C in client should terminate the output of resultset.
- A Proxy for ClickHouse with routing rules
- Should TTL Delete merges be limited by the size of the merge pool?
- Confusing message about `multiple CROSS/COMMA JOIN` despite no CROSS JOINs
- Is the combination of pipeline reasonable in the join scenario?
- NOAA weather dataset
- Docs
- C++ not yet supported