clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Count packed skip-index archive index loads, and assert 04653 on that counter
- Do not re-probe a PromQL selector that is known not to match a whole metric
- Account for rows read into the reverse read-in-order buffer
- Support hierarchical (dotted) database and table names
- Add `create_union_system_log_tables` to the default server configuration
- [Umbrella] Materialized CTEs improvements
- Skip the out-of-lookup-table range check in `toYYYYMMDDhhmmss` for `DateTime` and `Date`
- 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
- Extend reading in reverse order with FINAL to Merge tables and topKThroughJoin
- Docs
- C++ not yet supported