# # Test to ensure that we don't get stack overflows # drop table if exists t1,t2; # # MDEV-5724 # Server crashes on SQL select containing more group by and left join # statements # This was because record_buffer was 300,000 bytes and caused stack overflow # CREATE TABLE t1 ( `sspo_id` int(11) NOT NULL AUTO_INCREMENT, `sspo_uid` int(11) NOT NULL DEFAULT '0', `sspo_type` varchar(1) NOT NULL DEFAULT 'P', `sspo_text` longtext NOT NULL, `sspo_image` varchar(255) NOT NULL, `sspo_source` int(11) NOT NULL DEFAULT '0', `sspo_event_name` varchar(255) NOT NULL DEFAULT '', `sspo_event_location` varchar(255) NOT NULL DEFAULT '', `sspo_event_date` datetime DEFAULT NULL, `sspo_remote_title` varchar(255) NOT NULL, `sspo_remote_url` varchar(255) NOT NULL, `sspo_remote_desc` text NOT NULL, `sspo_remote_image` varchar(255) NOT NULL, `sspo_obj_status` varchar(1) NOT NULL DEFAULT 'A', `sspo_cr_date` datetime NOT NULL DEFAULT '1970-01-01 00:00:00', `sspo_cr_uid` int(11) NOT NULL DEFAULT '0', `sspo_lu_date` datetime NOT NULL DEFAULT '1970-01-01 00:00:00', `sspo_lu_uid` int(11) NOT NULL DEFAULT '0', PRIMARY KEY (`sspo_id`), KEY `post_uid` (`sspo_uid`,`sspo_cr_date`) ) ENGINE=InnoDB AUTO_INCREMENT=30 DEFAULT CHARSET=utf8; INSERT INTO t1 VALUES (1,2,'P','test1','',0,'','',NULL,'','','','','A','2013-09-30 00:19:32',2,'2013-09-30 00:19:32',2),(2,2,'P','bbb','',0,'','',NULL,'','','','','A','2013-10-02 15:06:35',2,'2013-10-02 15:06:35',2); CREATE TABLE `t2` ( `spoo_id` int(11) NOT NULL AUTO_INCREMENT, `spoo_user_type_id` int(11) NOT NULL DEFAULT '0', `spoo_uid` int(11) NOT NULL DEFAULT '0', `spoo_option_id` int(11) NOT NULL DEFAULT '0', `spoo_value` varchar(10000) NOT NULL, `spoo_obj_status` varchar(1) NOT NULL DEFAULT 'A', `spoo_cr_date` datetime NOT NULL DEFAULT '1970-01-01 00:00:00', `spoo_cr_uid` int(11) NOT NULL DEFAULT '0', `spoo_lu_date` datetime NOT NULL DEFAULT '1970-01-01 00:00:00', `spoo_lu_uid` int(11) NOT NULL DEFAULT '0', PRIMARY KEY (`spoo_id`), KEY `object_option_main_idx` (`spoo_user_type_id`,`spoo_uid`,`spoo_option_id`,`spoo_value`(255)) ) ENGINE=InnoDB AUTO_INCREMENT=107 DEFAULT CHARSET=utf8; INSERT INTO `t2` VALUES (19,1,2,6,'Dortmund','A','2013-09-26 01:36:51',2,'2013-09-26 01:36:51',2),(20,1,2,8,'49','A','2013-09-26 01:36:51',2,'2013-09-26 01:36:51',2); SELECT Count(*) FROM t1 AS tbl LEFT JOIN t2 a ON a.spoo_uid = sspo_uid AND a.spoo_option_id = 1 LEFT JOIN t2 b ON b.spoo_uid = sspo_uid AND b.spoo_option_id = 2 LEFT JOIN t2 c ON c.spoo_uid = sspo_uid AND c.spoo_option_id = 3 LEFT JOIN t2 d ON d.spoo_uid = sspo_uid AND d.spoo_option_id = 5 LEFT JOIN t2 e ON e.spoo_uid = sspo_uid AND e.spoo_option_id = 4 LEFT JOIN t2 f ON f.spoo_uid = sspo_uid AND f.spoo_option_id = 11 LEFT JOIN t2 g ON g.spoo_uid = sspo_uid AND g.spoo_option_id = 7 LEFT JOIN t2 h ON h.spoo_uid = sspo_uid AND h.spoo_option_id = 10 LEFT JOIN t2 i ON i.spoo_uid = sspo_uid AND i.spoo_option_id = 18 LEFT JOIN t2 j ON j.spoo_uid = sspo_uid AND j.spoo_option_id = 6 GROUP BY a.spoo_value, b.spoo_value, c.spoo_value, d.spoo_value, e.spoo_value, f.spoo_value, g.spoo_value, h.spoo_value, i.spoo_value, j.spoo_value; drop table t1,t2;