clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Lay out the consecutive-keys cache so no per-row store crosses a 16-byte boundary
- ALTER under `data_type_default_nullable` breaks `SimpleAggregateFunction` merges
- Iceberg remove_orphan_files and expire_snapshots ignore KILL QUERY and max_execution_time until they finish
- Answer `min`/`max` of Parquet columns from statistics for `s3`, `url` and other object storages
- Add `input_format_parquet_detect_variant_by_structure` to the Parquet schema inference cache key
- Iceberg: omit `parent-snapshot-id` on root snapshots and list only previous files in `metadata-log`
- Docs: Use native Markdown images throughout the documentation
- Fix filtered reads of Iceberg truncate partitions that ClickHouse 26.8 and older wrote for negative integers
- Stop Iceberg `remove_orphan_files` and `expire_snapshots` on `KILL QUERY` and `max_execution_time`
- Docs: update Managed Postgres billing documentation
- Docs
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