clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix typo in file name: enciding -> encoding
- Faster `GROUP BY` of fixed-width keys and one `String`
- Join reorder puts the fact table on the hash build side when a dimension table has no statistics (parts written before 26.8): up to 30x slower than 26.6
- Send the tasks of a stage to stateless workers in parallel
- Add standard correlated qualifier resolution setting
- TRUNCATE removes parts immediately, ignoring `old_parts_lifetime`
- Fix identity of dynamic disks with server credential markers
- Forbid using a lightweight snapshot as the base of an incremental backup
- Fix HDFS disk to follow host allowlist
- Keep the instant of a typed `DateTime` JSON path in `CAST` to `JSON` and `ALTER ... MODIFY COLUMN`
- Docs
- C++ not yet supported