Add something like the following to your module's .install file, where mymodule is the name of the module.
/**
* Implementation of hook_uninstall.
*/
function mymodule_uninstall() {
switch ($GLOBALS['db_type']) {
case 'mysql':
case 'mysqli':
case 'pgsql':
variable_del('mymodule_var_one');
variable_del('mymodule_var_two');
variable_del('mymodule_var_three');
break;
}
drupal_set_message(t('All references to the MyModule module have been removed from the database.'));
} // function hook_uninstall()
* Implementation of hook_uninstall.
*/
function mymodule_uninstall() {
switch ($GLOBALS['db_type']) {
case 'mysql':
case 'mysqli':
case 'pgsql':
variable_del('mymodule_var_one');
variable_del('mymodule_var_two');
variable_del('mymodule_var_three');
break;
}
drupal_set_message(t('All references to the MyModule module have been removed from the database.'));
} // function hook_uninstall()
variable_del() clears the variables cache table too, so you don't have to worry about that.