Expensive

SELECT * FROM gallery2 WHERE topic_id="746330" UNION SELECT * FROM gallery2 WHERE topic_id="575892" UNION SELECT * FROM gallery2 WHERE topic_id="1785676" UNION SELECT * FROM gallery2 WHERE topic_id="1212274" UNION SELECT * FROM gallery2 WHERE topic_id="106928" UNION SELECT * FROM gallery2 WHERE topic_id="644017" UNION SELECT * FROM gallery2 WHERE topic_id="1820167" UNION SELECT * FROM gallery2 WHERE topic_id="1808210" UNION SELECT * FROM gallery2 WHERE topic_id="1631594" UNION SELECT * FROM gallery2 WHERE topic_id="1317882" UNION SELECT * FROM gallery2 WHERE topic_id="307550" UNION SELECT * FROM gallery2 WHERE topic_id="451869" UNION SELECT * FROM gallery2 WHERE topic_id="613565" UNION SELECT * FROM gallery2 WHERE topic_id="387842" UNION SELECT * FROM gallery2 WHERE topic_id="1412561" UNION SELECT * FROM gallery2 WHERE topic_id="1288527"