clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- `loop()` string-splits identifier on '.', misroutes backtick-quoted dotted table names to a different (or nonexistent) database
- RFC: Vector Search Improvements and vector similarity index 2.0
- `optimize_read_in_order=1` coule be much slower than normal query。
- Performance regression in Iceberg manifest reading: exception hot-loop, eager log serialization, and std::filesystem::path in resolve()
- BoundingBox and Centroid functions
- `BackupWriterAzureBlobStorage::copyFile` writes destination outside `blob_path`, leaking blobs to container root
- `logQueryStart` early return when `query_log` is null silently disables `system.query_metric_log` collection
- Metrics for tracking insertions via materialized view
- external-authenticators http add support for role mapping
- Preallocate multipart_tags deque to reduce dynamic memory allocation …
- Docs
- C++ not yet supported