clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- `constraints_mode` setting
- Can't omit certain projections that make query 100x slower
- `An array type of bloom_filter supports only has(), indexOf(), and hasAny()` for `where a<>[]`
- Support Nullable types for arrayDifference function
- CREATE OR REPLACE TEMPORARY TABLE does not work
- Add LINEST function to Clickhouse
- [RFC] Simplify IAggregateFunction for simpler and faster Aggregate Functions
- avgAngle aggregate function, useable for GraphiteMergeTrees
- Row policy ignored if using group by and column that is part of partition expression
- Syntax error when trying to use a query parameter in SETTINGS
- Docs
- C++ not yet supported