clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Clickhouse doesen`t start if using xml dictionary dictGet in table default
- toJSONString return NULL instead of the json string “null” when input value is NULL
- windowFunnel ，The same value is counted multiple times
- `accurateCastOrDefault` does not fallback to default when converting to an Enum data type
- GROUPING SETS doesn't produce grand total row if there is no aggregate function
- Protobuf default values
- Error when using multiple NTILE() function calls with identical ORDER BY clause in a single query
- Default Values Fail When Adding Nested Tables with Array(Array(String))
- Support rewriting OPTIMIZE and ALTER(partition) on distributed table to local table with on cluster.
- Compression / Codec support for large integers (UInt256, etc.)
- Docs
- C++ not yet supported