clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Improve PREWHERE reordering on compact parts
- Migrate from `SimSIMD` to `NumKong`
- `DeltaLake` table keeps one object storage connection per `_delta_log` commit in each cached snapshot, so connections grow linearly with `INSERT`s
- Read Parquet files with data pages that have no values
- Add `snapshot_loading_mode` to load only referenced snapshots from Iceberg REST catalogs
- Iceberg REST Catalog: Add warehouse support (part 1)
- Evaluate the `PARTITION BY` expression of file and object storage writes once per INSERT, not once per block
- `rowNumberInAllBlocks()` resets per chunk in S3/file `PARTITION BY` after #92844
- Track used skip indices in query log
- Qualify table function arguments sent to parallel replicas
- Docs
- C++ not yet supported