I would say it’s an improvement :P

SELECT * FROM gallery2 WHERE topic_id="582849" UNION SELECT * FROM gallery2 WHERE topic_id="1051149" UNION SELECT * FROM gallery2 WHERE topic_id="583164" UNION SELECT * FROM gallery2 WHERE topic_id="1105848" UNION SELECT * FROM gallery2 WHERE topic_id="833489" UNION SELECT * FROM gallery2 WHERE topic_id="128130" UNION SELECT * FROM gallery2 WHERE topic_id="1602956" UNION SELECT * FROM gallery2 WHERE topic_id="1195502" UNION SELECT * FROM gallery2 WHERE topic_id="768855" UNION SELECT * FROM gallery2 WHERE topic_id="1685910" UNION SELECT * FROM gallery2 WHERE topic_id="825595" UNION SELECT * FROM gallery2 WHERE topic_id="1683930" UNION SELECT * FROM gallery2 WHERE topic_id="556095" UNION SELECT * FROM gallery2 WHERE topic_id="821096" UNION SELECT * FROM gallery2 WHERE topic_id="1281711" UNION SELECT * FROM gallery2 WHERE topic_id="482077"