clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix NULL values being silently converted to empty strings
- RBAC: mutations with subqueries bypass SELECT checks when validate_mutation_query=0
- ALTER NAMED COLLECTION changes are not picked up by Kafka engine tables without DETACH/ATTACH
- Keeper: don't hold the snapshots lock during snapshot serialization and disk I/O
- Logical error: Bad cast from type A to B (STID: 4054-600e)
- Enable lazy materialization with patch parts
- Logical error 'txn' in ImplicitTransactionControlExecutor::commit on cancelled implicit-transaction query
- Add documentation for the OOM canary feature
- Make CPU-bound `work()` interruptible: large single chunks block `KILL QUERY` / timeouts
- Segmentation fault (STID: None)
- Docs
- C++ not yet supported