clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- PostgreSQL (SELECT ...) source unquotes mixed-case identifiers, query fails
- Keep trailing zero bytes when converting `FixedString` to `String`
- Exact-limit multipart form rejected: `LimitReadBuffer` keeps a stale position
- Fix wrong results after re-adding a skip index with the same name
- arrayJoin in WATERMARK expression causes LOGICAL_ERROR in streaming read
- Nullable scalar placeholder now 0: `DELETE`/`CREATE VIEW` dividing by it throw
- Wide-part `MATERIALIZE PROJECTION` freezes an unstored column's DEFAULT
- RENAME x TO y, ADD COLUMN x reads stale old x until rename mutation applies
- CD-A/CD-C gate null-rejection on outer `join_use_nulls`, not the subquery's
- Resolve a stale marker and a NaN at the same timestamp independently of order
- Docs
- C++ not yet supported