I can't figure how it is possible that the table I define in a hook_schema is created when I enable my module, but it isn't deleted when I uninstall the module (after disabling).

Drupal 7 documentation sais that the table should be automatically created and deleted when these events occours.

Here is the relevant part of the code inside `my_module.install`:

    function my_module_schema(){
        $schema = array();
        $schema["my_module_table_xyz"] = array(
                ...
        );
        return $schema;
    }

I don't know if it could be related to the difference between the modue name and the table name... or from the code present in the `hook_uninstall`... or something else...

Considering I also define a node type, the `hook_uninstall` should delete it (see following code), then `system` should automatically uninstall previously defined schema.

    function my_module_uninstall(){
        ...
        node_delete_multiple(...);
        // delete custom fields
        node_type_delete(...);
        field_purge_batch(...);
    }

What do you think about?
Thanks

**NOTE:** I use Drush to disable, uninstall and reinstall the module and I get the error `Table my_module_table_xyz already exist`.