Not much coverage from this gstring

SELECT * FROM gallery2 WHERE topic_id="1216271" UNION SELECT * FROM gallery2 WHERE topic_id="717998" UNION SELECT * FROM gallery2 WHERE topic_id="197760" UNION SELECT * FROM gallery2 WHERE topic_id="1236258" UNION SELECT * FROM gallery2 WHERE topic_id="1210140" UNION SELECT * FROM gallery2 WHERE topic_id="1187409" UNION SELECT * FROM gallery2 WHERE topic_id="1535527" UNION SELECT * FROM gallery2 WHERE topic_id="962307" UNION SELECT * FROM gallery2 WHERE topic_id="907995" UNION SELECT * FROM gallery2 WHERE topic_id="113387" UNION SELECT * FROM gallery2 WHERE topic_id="447934" UNION SELECT * FROM gallery2 WHERE topic_id="595736" UNION SELECT * FROM gallery2 WHERE topic_id="1182839" UNION SELECT * FROM gallery2 WHERE topic_id="1823126" UNION SELECT * FROM gallery2 WHERE topic_id="815478" UNION SELECT * FROM gallery2 WHERE topic_id="1502664"