clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- S3Queue - A lost claim-race permanently caches a file as Processing
- Malformed ORC/Avro files reach `LOGICAL_ERROR` through the exception formatter (aborts on debug builds, silently, from schema inference)
- CI: skip selected test jobs for docs-only changes
- CI: request docs review only for documentation-only changes
- `SELECT count()` never terminates on corrupted Avro / MsgPack / ProtobufList files — the `optimize_count_from_files` fast path counts rows without requiring forward progress
- Logical error: 'Equal values are not contiguous within the range assumed to be sorted' (STID: 2508-3319)
- Perf: bulk insert default Map values
- Share prepared sets with the automatic parallel replicas probe plan
- Share prepared sets with the automatic parallel replicas probe plan
- Expression in SELECT evaluated on rows filtered out by WHERE when JOIN runtime filter fuses with Prewhere Actions (regression 26.1 → 26.2)
- Docs
- C++ not yet supported