clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Bump `AMQP-CPP` from v4.3.18 to v4.3.27
- `has`/`indexOf`/`countEqual` compare an `Enum` needle by its numeric value, not its label — silent wrong results vs `equals`/`IN`/`hasAny`
- Do not detach a part whose `columns.txt` survived a power loss empty
- Do not read a short `uniqTheta` state past its buffer
- Avoid copying whole directory maps in plain-rewritable metadata snapshots
- Enforce `allow_feature_tier` when access entities change effective settings
- Parquet: ClickHouse writes `Nullable(Tuple)` files it cannot read back, when any element is nullable or an array
- Do not lose the rows of a shard that returns no columns
- Bloom filter hash pairs hash the data twice; hashing once is bit-identical and ~11% faster on TPC-H query_21
- Record dataflow statistics on three paths that aggregation was dropping
- Docs
- C++ not yet supported