MySQL 8.0 Reference Manual Including MySQL NDB Cluster 8.0

5.5.1 Installing and Uninstalling Components

Server components must be loaded into the server before they can be used. MySQL supports component loading at runtime.

The INSTALL COMPONENT and UNINSTALL COMPONENT SQL statements enable component loading and unloading. For example:

INSTALL COMPONENT 'file://component_validate_password';
UNINSTALL COMPONENT 'file://component_validate_password';

A loader service handles component loading and unloading, and also lists loaded components in the component table of the mysql system database that serves as a registry.

The SQL statements for component manipulation affect server operation and the mysql.component system table as follows:

Compared to the corresponding INSTALL PLUGIN statement for server plugins, the INSTALL COMPONENT statement for components offers the significant advantage that it is not necessary to know any platform-specific file name suffix for naming the component. This means that a given INSTALL COMPONENT statement can be executed uniformly across platforms.