MySQL 9.3 Release Notes
The global_variable_attributes
table provides information about attributes and their values
that have been set by the server for global variables such as
offline_mode or
read_only.
More than one attribute-value pair can be assigned to a given global variable. Such attribute-value pairs can be assigned to global variables only, and not to session variables.
Attributes and their values cannot be set by users, nor can they be read by users other than querying this table. Attributes and their values can be set, modified, or removed only by the server.
The global_variable_attributes
table contains the columns listed here:
VARIABLE_NAMEName of the global variable.
ATTR_NAMEName of an attribute assigned to the variable named in
VARIABLE_NAMEATTR_VALUEValue of the attribute named in
ATTR_NAME.
The global_variable_attributes
table is read-only, and neither the table nor any rows it
contains can be modified by users. For an example of how the
server uses system variable attributes, see the description of
the offline_mode variable.