clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- min/max functions do not use min-max index
- UNIQUE KEY accepts a subcolumn, making the table permanently un-insertable
- Dropping a nested column group bypasses every ALTER protection
- GROUP BY returns the same key in multiple rows when the left side of a JOIN is SELECT DISTINCT (parallel_hash + optimize_distinct_in_order
- Does CODEC(Default) mean server's default of table's one?
- Fix LOGICAL_ERROR when reading column-mapped Delta Lake table
- Accept signed PromQL @ timestamps
- Fix header column order after the no-rescoring vector search rewrite
- S3 multipart complete: a NoSuchUpload is rewritten to success on key existence alone, silently losing an acknowledged fixed-key INSERT
- Add the `Cluster` database engine
- Docs
- C++ not yet supported