- `param_name` varchar(32) NOT NULL, # parameter name
- `param_value` text default NULL, # parameter value
- `created` datetime default CURRENT_TIMESTAMP, # creation time
- `updated` datetime ON UPDATE CURRENT_TIMESTAMP, # modification time
+ `param_name` varchar(32) NOT NULL, # parameter name
+ `param_value` text default NULL, # parameter value
+ `created` datetime default NULL, # creation time
+ `updated` datetime default NULL, # modification time