clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- odd excpetion messages when scalar in (select [array])
- Alter table [...] clear column stuck
- Short circuit function evaluation is not applied to constant in conversion functions
- mapContainsKeyLike and mapExtractKeyLike do not work on constants
- When you modify a table its materialized views execute scalar subqueries
- Incorrect mutation can easily produce inifinite CPU usage in a loop of retries
- Integrate scalar subqueries into query pipeline
- WIP Add parallel gz deflating buffer
- LIMIT BY optimizations.
- Qurying progress reach 99% and print all the result quickly,but reach 100% slowly
- Docs
- C++ not yet supported