clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Check every partition of `INSERT INTO FUNCTION ... PARTITION BY` against filtered source grants
- Merge the three `qbit_l2_distance_*_memory` performance tests into one file
- Reopen pooled connections whose address no longer resolves for their host
- Fix display width of truncated column names
- Use vectorized SipHash for every column type in `sipHash128`, `sipHash64` and `IColumn::updateHashWithValue`
- Reset the fake exchange peer only after the source acknowledged its bytes
- Support clusters using interserver secret in `QueryRunner`
- Use the NDV of Iceberg table statistics in join reordering estimates
- La Casa Del Dolor: keep the Azure list_object_keys_size within a 32-bit int
- Read Parquet footers of bucket splitting through `ParquetMetadataCache`
- Docs
- C++ not yet supported