I will talk about unusual and unique ClickHouse features:
- aggregation states as first-class citizens;
- multidimensional arrays and higher-order functions;
- approximate query execution;
- incremental data aggregation;
- query processing without the server;
I will show practical examples and use cases from Yandex and other companies.
Aleksei Milovidov, Dev Lead at Yandex. Since 2008 has been developing data storage systems for Yandex Metrica. ClickHouse project founder and developer.