clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Accept any date-time format parseDateTimeBestEffort understands in Prometheus time parameters
- FR: EXECUTE AS ... CONST_SETTINGS`: enforce locked settings applied when impersonating a user
- BigQuery is slow
- Grid `contains` maps points past the bbox max side into `inner` cells
- pointInPolygon rejects constant polygons with ordinary large coordinates
- CODEC(FPC) on bucketed Map fails every merge after bucket_indexes becomes UInt8
- Column `ALTER` during unregistered `ALTER UPDATE` leaves mutation queue stuck
- Merge records a version above an unapplied lightweight `UPDATE`: update lost
- Static YTsaurus read with max_streams = 0 fails with LOGICAL_ERROR
- `<=>`/`=` with nested NULL constant skips matching granules and parts
- Docs
- C++ not yet supported