clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Validate a JSON subcolumn by its substream path in skip-index analysis
- Treat a Nullable null-map byte as a predicate, not a value
- Share immutable query settings and track live storage
- Stop a stored timeSeriesSelector() or prometheusQuery() definition from making the server unstartable
- Reuse prepared actions for direct column keys and indexes when writing parts
- `transform` returns wrong results for unmatched `Decimal` values when the result scale is larger: the fractional part is not rescaled (`1.5` -> `1.005`)
- [GPU] Support aggregation functions
- DISTINCT / GROUP BY / uniqExact count NaN payloads differently for LowCardinality(Float64) than for Float64, because the dictionary canonicalizes them on insert
- Bump `mariadb-connector-c` from v3.4.9 to v3.4.10
- accurateCast / accurateCastOrNull / accurateCastOrDefault to DateTime64 and Time64 silently saturate instead of failing, and reject representable wide-integer sources
- Docs
- C++ not yet supported