public static function getTablesNames(string $schemaName): array
  {
    $sql = sprintf("
select TABLE_NAME as table_name
from   information_schema.TABLES
where  TABLE_SCHEMA = %s
and    TABLE_TYPE   = 'BASE TABLE'
order by TABLE_NAME", self::$dl->quoteString($schemaName));

    return self::$dl->executeRows($sql);
  }