clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- UserTimeMicroseconds and SystemTimeMicroseconds seems to not report correclty for INSERTs with MVs involved
- Not found column in block:
- Kafka table engine with protobuf serialization cannot handle DateTime(9)
- Order by and limit on grouping sets
- Sparse encoding for non-default default values
- Formatted ALTER queries result in a syntax error
- S3Queue & schema evolution problems
- MySQL Decimal Data Type Correctly Converted to String in ClickHouse MySQL Engine
- Automatic `LowCardinality` representation of columns
- Bad mutations with virtual columns
- Docs
- C++ not yet supported