30.4.5.22 The version_patch() Function
 
 
 
          This function returns the patch release version of the MySQL
          server.
            A TINYINT UNSIGNED value.
 
mysql> SELECT VERSION(), sys.version_patch();
+--------------+---------------------+
| VERSION()    | sys.version_patch() |
+--------------+---------------------+
| 8.0.26-debug |                  26 |
+--------------+---------------------+