clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Protobuf input_format_protobuf_oneof_presence duplicates rows causing LOGICAL_ERROR
- use Double-Array Aho-Corasick to support fast multiSearchAny over > 255 patterns
- Support hard links in the disks with `plain_rewritable` metadata
- Add test for vector search on Distributed tables
- Try using optimised hex encode and decode for `hex`
- Add exponential backoff for waiting operations in replication queue
- Trying to load 100M records using the JSON data type leads to DB::Exception: (total) memory limit exceeded on Mac OS
- Add support for Proleptic Gregorian dates before 1900-01-01 for Date32
- Dynamic workload weights for graceful degradation
- The `distinct` operation can be executed in parallel on a per-partition basis
- Docs
- C++ not yet supported