array(0) { } string(320) "select pt1.catalog_id, pt2.catalog_id AS rel_id, count(*) as NumInCommon from `l_catalogs_tags` pt1 join `l_catalogs_tags` pt2 on pt1.tag_id = pt2.tag_id and pt1.catalog_id < pt2.catalog_id group by pt1.catalog_id, pt2.catalog_id HAVING count(*) >= 1 AND pt1.catalog_id = LIMIT 5" PDO Error: SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'LIMIT 5' at line 7