clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Add test: FINAL-disable guard for virtual row optimization untested with `SELECT FROM ... FINAL`
- Add unit test for not-ready Set detection in filterResultForMatchedRows
- Skip 01192 and 01307 on Azure blob storage
- Implement Postgres `regexp_instr` function in ClickHouse
- Iceberg: Optimize JSON metadata parsing by improving string replacement
- Fix race in MergeTreeTransaction::afterCommit between state publish and part CSN update
- Optimize `LIMIT BY` by pushing down `LIMIT BY` into `Sort`
- Support Virtual Columns in Per-Part MinMax Index
- support three-valued logic in SelectivityEstimator
- Fix `FunctionsStress.stress` abort when a worker thread gets stuck
- Docs
- C++ not yet supported