clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix logical error !raw_type->isNullable() in AND-compare chain optimization
- New Setting to enable successive time range queries over a large overall time range
- Fix transform_null_in=1 for a non-Nullable key IN/NOT IN a Nullable subquery
- Make on-disk SQL objects (UDFs, named collections, workloads) crash-durable
- Make Keeper cross-disk snapshot/changelog moves durable
- Fix ORDER BY not applied globally when reading Distributed through Merge
- Move backup credential handling into backup engines
- Adaptive Aggregator
- Fall back to hash for correlated-subquery decorrelation joins
- Fsync directory on Atomic DDL commit rename to survive power loss
- Docs
- C++ not yet supported