public function up(Schema $schema): void
{
    $this->addSql("INSERT INTO `dtb_csv`(`csv_type_id`, `creator_id`, `entity_name`, `field_name`, `reference_field_name`, `disp_name`, `sort_no`, `enabled`, `create_date`, `update_date`, `discriminator_type`)
            SELECT 3, NULL, 'Eccube\\\\Entity\\\\Order', 'message', NULL, 'お問い合わせ', max(`sort_no`)+1, 1, NOW(), NOW(), 'csv' FROM `dtb_csv` WHERE `csv_type_id`=3;
        ");
    $this->addSql("INSERT INTO `dtb_csv`(`csv_type_id`, `creator_id`, `entity_name`, `field_name`, `reference_field_name`, `disp_name`, `sort_no`, `enabled`, `create_date`, `update_date`, `discriminator_type`)
            SELECT 4, NULL, 'Eccube\\\\Entity\\\\Order', 'message', NULL, 'お問い合わせ', max(`sort_no`)+1, 1, NOW(), NOW(), 'csv' FROM `dtb_csv` WHERE `csv_type_id`=4;
        ");
}

public function down(Schema $schema): void
{
    $this->addSql("DELETE FROM `dtb_csv` WHERE `field_name` IN ('message');");
}