clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Add array_group_by_mode setting for GROUP BY array comparison
- S3Queue Ordered Mode should use S3 ListObjects's StartAfter parameter to dramatically reduce the number of S3 ListObject calls.
- use Double-Array Aho-Corasick to support fast multiSearchAny over > 255 patterns
- Support hard links in the disks with `plain_rewritable` metadata
- Improve vector similarity index optimization for Distributed table
- Optimize KeyCondition for long Primary Keys and for high-cardinality Primary Keys
- Try using optimised hex encode and decode for `hex`
- fix possible crash with filesystem_cache_boundary_alignment
- Supports automatically fill on cluster value
- Allow positional arguments in distributed queries
- Docs
- C++ not yet supported