clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Docs: clarify `ngramSearch` scoring
- Fix(Web UI): Use headers for scripted query authentication
- Add OpenTelemetry spans for the fragment DAG of a distributed plan on the initiator
- `ARRAY JOIN r.col` drops the `*` join qualifier; same-named columns collide
- system.s3_queue_settings.changed is 0 for legacy s3queue_ prefixed settings
- Retry transaction metadata writes in noexcept commit and rollback
- amd_compat / amd64compat should be built on LTS branches
- `MergeTreePrefetchedReadPool`: query threads block while scheduling prefetches, so `max_execution_time` and `KILL QUERY` are delayed until the prefetch pool drains
- Column named like a MergeTree key or skip index expression: INSERT replaces its values and partition pruning drops its rows
- Request for optimisation: joins written as tuples are slow
- Docs
- C++ not yet supported