clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Wrong `ORDER BY ... LIMIT` results on column-mapped Delta Lake tables
- Parallel replicas: `Distributed` read fails on shard lacking the cluster
- CACHE dictionaries can stall under high concurrency and do not recover without manual intervention
- `max_temporary_tables` wrongly counts temporary views
- `file()`/`url()` schema and row-count caches ignore `compression_method`
- Add a setting to capture the query plan of only a sample of queries
- Bump `simdjson` from v4.6.11 to v5.0.8
- `set` skip index throws on valid queries with short-circuit guard predicates
- Fix RabbitMQ engine stopping consumption when the backlog exceeds the internal queue
- Backup of lagging ReplicatedMergeTree replica writes stale column comment
- Docs
- C++ not yet supported