<?php
/**
 * webtrees: online genealogy
 * Copyright (C) 2018 webtrees development team
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
declare(strict_types=1);

namespace Fisharebest\Webtrees\Schema;

use Fisharebest\Webtrees\Database;
use PDOException;

/**
 * Upgrade the database schema from version 18 to version 19.
 */
class Migration18 implements MigrationInterface
{
    /**
     * Upgrade to to the next version.
     *
     * @return void
     */
    public function upgrade(): void
    {
        // Update some indexes, based on analysis of slow-query-logs
        try {
            Database::exec(
                "ALTER TABLE `##places`" .
                " DROP       KEY ix1," .
                " DROP       KEY ix2," .
                " DROP       KEY ix3," .
                " DROP       KEY ix4," .
                " DROP       p_level," . // Not needed - implicit from p_parent
                " ADD        KEY ix1 (p_file, p_place)," . // autocomplete.php
                " ADD UNIQUE KEY ux1 (p_parent_id, p_file, p_place)" // placelist.php
            );
        } catch (PDOException $ex) {
            // Already done?
        }
    }
}