clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix bucket-aware merging dropped by analyzer with ARRAY JOIN over remote source
- `isNullable` returns 0 for constant Dynamic/Variant but 1 for non-constant - inconsistent constant folding
- `accept-invalid-certificate` config check uses `has()` instead of `getBool()` — explicit 0 still accepts certificates
- `withOrdinalEnding` off-by-one error: 4th argument reported as '3th'
- `skip_first_lines` not in cache key for `CSVWithNames`/`TSVWithNames` causes wrong schema to be returned
- Add `binary_fuse_filter` skip index type for MergeTree tables
- Support PromQL changes and resets
- Support PromQL set binary operators
- Support PromQL label transformation functions
- Lower PromQL increase, deriv, and predict_linear
- Docs
- C++ not yet supported