clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- clickhouse local hangs at 100% CPU on any query when interactive_delay is 0 or below a poll cycle
- Fix LOGICAL_ERROR on a lazy FINAL text index read with different PREWHERE and WHERE predicates
- Key the patch join cache by the structure of the blocks it stores
- Analyzer: keep operand order when an OR chain of equalities is rewritten to IN
- Keep null-aware set atoms out of the nullable-key exact-count safeguard
- Add promql_exact_rate setting for exact rate and counter reset mode
- Fix(PromQL): Accept signed PromQL @ timestamps
- PromQL: derive the default subquery step from the data instead of a hardcoded 15 seconds
- Feat(PromQL): implement standalone start() and end() functions
- Keep the back-quotes on keyword-named identifiers the parser re-reads as syntax
- Docs
- C++ not yet supported