$sql = 'SELECT COUNT(p.post_id) AS prev_posts

		FROM ' . POSTS_TABLE . " p

		WHERE p.post_approved = 1

			AND p.topic_id = {$topic_data['topic_id']}

			" . ((!$auth->acl_get('m_approve', $forum_id)) ? 'AND p.post_approved = 1' : '') . "

			AND " . (($sort_dir == 'd') ?  "p.post_id >= $post_id" : "p.post_id <= $post_id");