The Ultimate Guide to High Availability with MariaDB

Comments - User-Defined Variables

1 week ago Jindrich Pachta
Re: User-Defined Variables

Use following queries to list User-Defined variables in active session

Create User-Defined variable @year:

SET @year=YEAR(NOW());

Brief list of User-Defined variables:

SHOW USER_VARIABLES;
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| year          | 2025  |
+---------------+-------+

Detailed list of User-Defined variables:

SELECT * FROM information_schema.USER_VARIABLES;
+---------------+----------------+---------------+--------------------+
| VARIABLE_NAME | VARIABLE_VALUE | VARIABLE_TYPE | CHARACTER_SET_NAME |
+---------------+----------------+---------------+--------------------+
| year          | 2025           | INT           | latin1             |
+---------------+----------------+---------------+--------------------+

Both queries supports LIKE 'pattern' | WHERE expr clause.

 
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