def METHOD_NAME(self):
    """Returns the number of identifiers (or path-parts) required to uniquely specify a table."""
    if self is self.GPKG:
        return 1  # TABLE
    elif self is self.MYSQL:
        return 2  # DBNAME.TABLE
    elif self in (self.POSTGIS, self.SQL_SERVER):
        return 3  # DBNAME.DBSCHEMA.TABLE