clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Add a setting `output_format_write_metrics`
- use agg-Merge/agg-MergeState with SimpleAggregateFunction data type
- Support `DEFAULT` keyword in format `Values` while using SQL parser
- Play UI: allow to configure a table where the queries will be saved for sharing.
- To support DEFAULT in INSERT VALUES
- Play UI: tell if the result is truncated.
- Distribute query DB::Exception: Timeout exceeded while writing to socket
- OPTIMIZE TABLE PARTITION not respecting TTL TO VOLUME
- Unexpected error in kafka engine "DB::Exception: Decimal value is too big"
- Use EXPLAIN ANALYZE to profile on processor level
- Docs
- C++ not yet supported