clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Change `group by` keys order according to the `order by` keys order when aggregating in order
- Using WITH clause in table functions.
- Split database resources to multiple groups of users
- Key-value Data Marts
- Server falls when execute EXPLAIN
- Constraint optimization requires to have WHERE clause in query.
- alter enum to String unexpected result
- Return column structure in case of empty resultset
- groupArray(column_1,column_2) -> Array(Tuple(column_1, column_2))
- Support subquery with JOIN without FROM keyword
- Docs
- C++ not yet supported