clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix cardinality underestimation when join column NDVs are unknown
- Add LOOKUP INDEX support for MergeTree
- AWS Kinesis table engine
- Add functions for content-defined-chuncking
- Add Sparkbar aggregate function combinator
- Add geo aggregate functions #80186
- date_time_overflow_behavior setting silently ignored for all DateTime64/Time64 numeric casts due to hardcoded default_date_time_overflow_behavior in template instantiation
- Test reference file hardcodes database-dependent ZK paths, causing CI failure
- Add port_offset configuration parameter
- INDEX_NOT_USED error thrown when index may actually be used
- Docs
- C++ not yet supported