Question

我知道这已得到解决，但解决方案并没有帮助我。

我有一张包含300万条记录的表格。列已编入索引。

SELECT * FROM checklist_search WHERE player LIKE '%Mike%' AND player LIKE '%Trout%'
ORDER BY 0+year ASC, search_data ASC, 0+cardnumber ASC  
LIMIT 0, 50

如果没有ORDER BY，查询速度很快 - 查询耗时0.0156秒使用ORDER BY查询需要3.7068秒

基于此问题的其他答案，我尝试了

SELECT * FROM(SELECT * FROM checklist_search WHERE player LIKE '%Mike%' AND player LIKE '%Trout%'
  ) as myalias ORDER BY 0+year ASC, search_data ASC, 0+cardnumber ASC
LIMIT 0, 50

但结果是一样的。

这是表和索引结构

CREATE TABLE IF NOT EXISTS `checklist_search` (
  `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
  `page_type` varchar(10) NOT NULL DEFAULT '',
  `checklist_db` varchar(20) NOT NULL DEFAULT '',
  `set_id` int(10) unsigned NOT NULL,
  `card_id` int(11) NOT NULL,
  `search_data` varchar(255) NOT NULL DEFAULT '0',
  `year` varchar(10) NOT NULL DEFAULT '0',
  `brand` varchar(100) NOT NULL,
  `issue` varchar(100) NOT NULL,
  `set_name` varchar(150) NOT NULL DEFAULT '',
  `cardnumber` varchar(10) NOT NULL,
  `player` varchar(150) NOT NULL DEFAULT '',
  `team` varchar(150) NOT NULL DEFAULT '',
  `rc` int(1) NOT NULL,
  `sp` int(1) NOT NULL,
  `gu` int(1) NOT NULL,
  `auto` int(1) NOT NULL,
  `parallel` int(1) NOT NULL,
  `insert_card` int(1) NOT NULL,
  `card_count` int(10) NOT NULL,
  `image_count` int(10) NOT NULL,
  `print_run` varchar(20) NOT NULL,
  `display_image_front` varchar(120) NOT NULL,
  `display_image_back` varchar(120) NOT NULL,
  `seo_url` varchar(255) NOT NULL,
  `created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  KEY `card_id` (`card_id`),
  KEY `checklist_db` (`checklist_db`),
  KEY `year` (`year`),
  KEY `player` (`player`),
  KEY `team` (`team`),
  KEY `print_run` (`print_run`),
  KEY `rc` (`rc`),
  KEY `set_id` (`set_id`),
  KEY `search_data` (`search_data`),
  KEY `cardnumber` (`cardnumber`),
  FULLTEXT KEY `player_2` (`player`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 PACK_KEYS=0 AUTO_INCREMENT=3203103 ;

非常感谢任何想法。

由于麦克

EDIT: Here is the result for 
EXPLAIN SELECT *
FROM checklist_search
WHERE player LIKE '%Mike%'
AND player LIKE '%Trout%'
ORDER BY year ASC , search_data ASC , cardnumber ASC
LIMIT 0 , 50

id  select_type     table   type    possible_keys   key     key_len     ref     rows    Extra   
1   SIMPLE  checklist_search    ALL     NULL    NULL    NULL    NULL    2837591     Using where; Using filesort

MySQL Query在包含Order BY的情况下显着减慢

0 个答案: