Method doDatabaseTransactions

/**
 * Method to handle database transactions for the installer
 *
 * @return  boolean  True on success
 *
 * @since   3.4
 * @throws  \RuntimeException
 */
protected function doDatabaseTransactions()
{
    $route = $this->route === 'discover_install' ? 'install' : $this->route;
    // Let's run the install queries for the component
    if (isset($this->getManifest()->{$route}->sql)) {
        $result = $this->parent->parseSQLFiles($this->getManifest()->{$route}->sql);
        if ($result === false) {
            // Only rollback if installing
            if ($route === 'install') {
                throw new \RuntimeException(Text::_('JLIB_INSTALLER_ABORT_INSTALL_ABORTED'));
            }
            return false;
        }
        // If installing with success and there is an uninstall script, add an installer rollback step to rollback if needed
        if ($route === 'install' && isset($this->getManifest()->uninstall->sql)) {
            $this->parent->pushStep(array('type' => 'query', 'script' => $this->getManifest()->uninstall->sql));
        }
    }
    return true;
}