clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Shipped query plan reads leave empty tables/databases/columns in query_log
- dictGet throws on valid LowCardinality(String) keys due to LC default ''
- dictGet/dictGetOrDefault throw on NULL rows of a Nullable key needing type cast
- RabbitMQ: Publishing events sleeps 200 ms per round trip instead of waiting on the event loop
- Fix lazy FINAL with SAMPLE
- Invalid date inside a `Tuple`-typed partition column still drops a partition
- `DROP PARTITION ''` on a `DateTime64` key drops the 1970-01-01 partition
- --login Basic client auth not form-encoded, Keycloak rejects + in secret
- NaN in Float RANGE-offset ORDER BY key corrupts window frames
- Make PromQL avg match Prometheus exactly
- Docs
- C++ not yet supported