clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Test AutoPR with `parallel_replicas_plan_based` time over time
- TimeSeries engine: add PromQL rollup result cache with sliding time-range reuse
- Add `create_union_system_log_tables` to the default server configuration
- [Umbrella] Materialized CTEs improvements
- Faster Iceberg catalog reads: read standard JdbcCatalog tables directly from Postgres?
- Skip the out-of-lookup-table range check in `toYYYYMMDDhhmmss` for `DateTime` and `Date`
- Evaluate a non-deterministic function per row over a `LowCardinality` argument
- PromQL whole-metric selector probe re-executes a nested SELECT on every query, dominating plan time for small instant queries
- Deny `SYSTEM DROP DATABASE REPLICA` for users without privileges
- argMin/argMax/intervalLengthSum persist unvalidated parameters into unparseable state type
- Docs
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