addExtensionSql("ALTER TABLE `{?_MYSQL_PREFIX?}_user_links` MODIFY `link_type` ENUM('NORMAL','BONUS') NOT NULL DEFAULT 'NORMAL'");
addExtensionSql("ALTER TABLE `{?_MYSQL_PREFIX?}_user_links` ADD `bonus_id` BIGINT(20) UNSIGNED NOT NULL DEFAULT 0");
addExtensionSql("ALTER TABLE `{?_MYSQL_PREFIX?}_user_links` ADD INDEX (`bonus_id`)");
addExtensionSql("ALTER TABLE `{?_MYSQL_PREFIX?}_user_links` MODIFY `link_type` ENUM('NORMAL','BONUS') NOT NULL DEFAULT 'NORMAL'");
addExtensionSql("ALTER TABLE `{?_MYSQL_PREFIX?}_user_links` ADD `bonus_id` BIGINT(20) UNSIGNED NOT NULL DEFAULT 0");
addExtensionSql("ALTER TABLE `{?_MYSQL_PREFIX?}_user_links` ADD INDEX (`bonus_id`)");