Services Introduction

The service mysql_global_variable_attributes exposes the set of methods to:

• read value of an attribute assigned to a given GLOBAL system variable, if such attribute exists
• assign an attribute to a given variable
• remove one or all attributes of a given variable
• helper methods to read timestamp and user name related to last system variable change

Another service mysql_global_variable_attributes_iterator supports dynamic attribute data discoverability by giving an ability to iterate all attributes of a given GLOBAL system variable.

As an alternative to this interface, the same data is being exported in the following table within the performance_schema database:

• global_variable_attributes