Issue #2010368 by fjgarlin, Pancho, poker10, daffie: Installer can't create...

  public function createDatabase($database) {

    // Escape the database name.

    $database = Database::getConnection()->escapeDatabase($database);

    // If the PECL intl extension is installed, use it to determine the proper

    // locale.  Otherwise, fall back to en_US.

    if (class_exists('Locale')) {

      $locale = \Locale::getDefault();

    $db_created = FALSE;

    // Try to determine the proper locales for character classification and

    // collation. If we could determine locales other than 'en_US', try creating

    // the database with these first.

    $ctype = setlocale(LC_CTYPE, 0);

    $collate = setlocale(LC_COLLATE, 0);

    if ($ctype && $collate) {

      try {

        $this->connection->exec("CREATE DATABASE $database WITH TEMPLATE template0 ENCODING='UTF8' LC_CTYPE='$ctype.UTF-8' LC_COLLATE='$collate.UTF-8'");

        $db_created = TRUE;

      }

      catch (\Exception $e) {

        // It might be that the server is remote and does not support the

        // locale and collation of the webserver, so we will try again.

      }

    else {

      $locale = 'en_US';

    }

    // Otherwise fall back to creating the database using the 'en_US' locales.

    if (!$db_created) {

      try {

      // Create the database and set it as active.

      $this->connection->exec("CREATE DATABASE $database WITH TEMPLATE template0 ENCODING='utf8' LC_CTYPE='$locale.utf8' LC_COLLATE='$locale.utf8'");

        $this->connection->exec("CREATE DATABASE $database WITH TEMPLATE template0 ENCODING='UTF8' LC_CTYPE='en_US.UTF-8' LC_COLLATE='en_US.UTF-8'");

      }

      catch (\Exception $e) {

        // If the database can't be created with the 'en_US' locale either,

        // we're finally throwing an exception.

        throw new DatabaseNotFoundException($e->getMessage());

      }

    }

  }

  public function mapConditionOperator($operator) {

    return static::$postgresqlConditionOperatorMap[$operator] ?? NULL;