clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Add two-model mode to continue-all-prs script
- Scope WITH aliases to the SELECT that declares them when adding the default database
- The remote leg of a Distributed query re-serializes a lenient toDecimal64 constant into a strict CAST that throws: local and distributed results diverge
- Fix File row policy / PREWHERE breaking DEFAULT columns missing from the data file
- RFC: Iceberg REST Catalog Support
- Support PromQL histogram_fraction for classic histograms
- MergingSortedTransform deadlocks in its always_read_till_end drain: NeedData with all inputs finished ("Pipeline stuck")
- Optimization for CI: run the full test suite only when review threads are resolved.
- Text index: support '<string>%' and '%<string>' patterns for LIKE/ILIKE optimization
- Remove `WINDOW VIEW` and reimplement time-window aggregation on top of streaming queries
- Docs
- C++ not yet supported