clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Mutation stuck with NOT_ENOUGH_SPACE exception instead of moving to another disk
- AnyHash of arrays or tuples of nullable values
- Hypothesis index in new analyzer
- ON CLUSTER commands on replicated tables should take zookeeper path into account
- RBAC: Restrictions on column doesn't take effect on system table
- Check primary key type for simple dictionary, to avoid misuse of dictionary tables
- Native LowCardinality(String) support for dictionaries.
- TABLE_SIZE_EXCEEDS_MAX_DROP_SIZE_LIMIT excepton during DETACH
- The VALUES format in INSERT query does not parse C-style comments
- Optimization: push down filter from join via subquery that returns join key
- Docs
- C++ not yet supported