SQL command after database connect

There is no feature to specify any database connection encoding after connecting to a database in the db_connect function in database.mysql.inc neather in database.pgsql.inc. For this reason I would add a new variable to the sitewide settings.php named :
$db_after_connect_sql
This variable could specify SQL command(s) to be executed right after the connection to the database. Example:
$db_after_connect_sql = "SET NAMES 'utf-8';SET CHARACTER SET utf8";
This would set the encoding to UTF-8 for every SQL command on MySQL 4.1.x. As a result the db_connect function should be modified to the following:

function db_connect($url) {
  global $db_after_connect_sql;
  $url = parse_url($url);

  // Allow for non-standard MySQL port.
  if (isset($url['port'])) {
     $url['host'] = $url['host'] .':'. $url['port'];
  }

  $connection = mysql_connect($url['host'], $url['user'], $url['pass'], TRUE) or die(mysql_error());
  mysql_select_db(substr($url['path'], 1)) or die('unable to select database');
  if (!empty($db_after_connect_sql) && $commands = explode(';', $db_after_connect_sql)) {
    foreach($commands as $val) {
      mysql_query($val, $connection);
    }
  }
  return $connection;
}

According to the previous code, the database.pgsql.inc should be modified similarly.