Information Schema USER_VARIABLES Table
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MariaDB 10.2.0
The USER_VARIABLES table was introduced in MariaDB 10.2.0 as part of the user_variables plugin.
The USER_VARIABLES table is created when the user_variables plugin is enabled, and contains information about user-defined variables.
The server needs to be restarted in order for the plugin to load, so it can either be installed by:
--plugin-load = user_variables
in the configuration file, or by running:
INSTALL SONAME 'user_variables';
which will return a warning, and then restarting the server.
It has the following columns:
| Column | Description |
|---|---|
| VARIABLE_NAME | Variable name. |
| VARIABLE_VALUE | Variable value. |
| VARIABLE_TYPE | Variable type. |
| CHARACTER_SET_NAME | Character set. |
Example
SELECT * FROM INFORMATION_SCHEMA.USER_VARIABLES ORDER BY VARIABLE_NAME; +---------------+----------------+---------------+--------------------+ | VARIABLE_NAME | VARIABLE_VALUE | VARIABLE_TYPE | CHARACTER_SET_NAME | +---------------+----------------+---------------+--------------------+ | var | 0 | INT | utf8 | | var2 | abc | VARCHAR | utf8 | +---------------+----------------+---------------+--------------------+
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