clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Add spatial_bbox skip index for MergeTree geometry columns
- WASM UDF columnar_v1 wire format
- Fix correlated subquery + GROUP BY ROLLUP under group_by_use_nulls
- Segmentation tokenizer for text index
- ORDER BY aggregate function combinator
- RFC: Vector Search Improvements and vector similarity index 2.0
- Metrics for tracking insertions via materialized view
- implement generate date array
- `openCgroupv2MetricFile` builds invalid file paths via string concat without separator, silently disabling all `CGroup*` metrics for nested cgroups (e.g. systemd setups)
- ReaderExecutor: pipeline-based read orchestration
- Docs
- C++ not yet supported