clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Perfomance issues for mutation on many partitions
- 2 distributed table join ,no result
- TTL materialization fail when table contains projection
- Scalar subqueries always executed even if not used
- Order of subquery scalars and CTE in WITH affect amount of passes for optimizer
- Unexpected result: dictionary with not nullable attribute + OrDefault Null
- Errors while running perf test `joins_in_memory`
- Try to find some configs for keeper-client
- Merge table function filesystem. Originally #42039. Originally #50208.
- Idea: CREATE AND RENAME IF EXISTS
- Docs
- C++ not yet supported