clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- `CREATE DATABASE ... ON CLUSTER` with literal shard/replica names makes two servers the same `Replicated` replica: LOGICAL_ERROR and crash loop (debug), permanently wedged database (release)
- minmax/set skip index on mortonEncode(x,y): any query on x or y throws Code 10
- Early short-circuit guard calls getResultType on IN's subquery arg: UNSUPPORTED_METHOD
- Support UPDATE of sorting/partition key columns via a server-side insert-then-delete
- Add release-pipeline dry-run PR checks (new, patch, recovery, out-of-order, guard)
- DataLakeCatalog: cache resolved table storages
- Iceberg: cache partition candidates per manifest
- Parquet: binary-search and cache ordered row-group fences
- Feat(PromQL): Prometheus query timeout parameter handling
- Fix wrong results when a part's hilbertEncode range is a single point
- Docs
- C++ not yet supported