install_verify_database_ready

install_verify_database_ready()

function install_verify_database_ready() {
  $system_schema = system_schema();
  end($system_schema);
  $table = key($system_schema);

  if ($database = Database::getConnectionInfo()) {
    if (Database::getConnection()->schema()->tableExists($table)) {
      throw new AlreadyInstalledException(\Drupal::service('string_translation'));
    }
  }
}