clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- How to insert parquet files into null table engine #81557
- StorageKafka2 - no test with isolation.level = read_committed
- Proper rounding for Float->DateTime64
- BACKUP ALL TO FILE fails to any TAR format - Code: 642. DB::Exception: Couldn't pack tar archive: Failed to write all bytes, 0 of 1048576, filename='.backup'. (CANNOT_PACK_ARCHIVE)
- add arrayJaccard which works for arrays exactly as stringJaccardIndex
- SYSTEM START VIEWS immediately starts all view refresh, docu says otherwise
- DB:Exception: Qualified matcher reservation.* found a non-compound expression
- Primary key index --> deterministic function over fields should be used for equality/IN predicates
- order by + limit applied before arrayJoin
- clickhouse started failing with file permission issue
- Docs
- C++ not yet supported