clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix dictGetOrNull corrupting input columns with a Nullable key
- Fix correlated subquery + GROUP BY ROLLUP under group_by_use_nulls
- Fix Arrow time32/time64 wrongly picking up timezone when inserted into Time/Time64
- `timeSeriesRange`/`timeSeriesFromGrid` silently truncate `Int64`/`UInt64` step to lower 32 bits for `DateTime`/`UInt32` timestamps
- Duplicate KV argument in `s3(...)` throws `LOGICAL_ERROR` instead of `BAD_ARGUMENTS`
- Analyzer generates single `MergingAggregatedTransform` for distributed GROUP BY with `LEFT ARRAY JOIN`; coordinator OOMs
- Replicate column comment changes in ZooKeeper
- `constructLocation` Azure branch uses `find("/" + bucket)` which matches inside the URL host — drops container from URL when bucket name is a prefix of the storage-account hostname
- Fix MULTIPLE_EXPRESSIONS_FOR_ALIAS on `SELECT *` over JOIN under parallel replicas
- Analyzer: Compatibility filter push down from HAVING to WHERE
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