Access control is one of the essential features of database management. Starting in late 2019, ClickHouse contributor Vitaly Baranov began to introduce robust, full-featured Role-Based Access Control (RBAC). As a result of this work, which included a huge number of tests implemented by the Altinity QA team, ClickHouse can now rightfully boast enterprise-level access control. Best of all, the commands are all in SQL.
User management is the front gate of RBAC. It controls access to ClickHouse itself. This article digs into new commands like CREATE USER that allow you to create, change, and delete users conveniently. We’ll focus on ways to control authentication for single ClickHouse servers.