有没有办法重写这个查询作为SQL视图工作

Question

我已经设法写下面的查询，这很好。我的问题是我使用了很多次，我认为它保证它自己的观点，但是当我有phpmyadmin为我创建视图时，以前需要0.0060秒的查询现在需要6.2094秒。

我的查询：

SELECT tr.uuid, tr.creator, 
(
    SELECT 
    GROUP_CONCAT(name) 
    FROM tags as t1 
    WHERE t1.uuid = tr.uuid and t1.type = "name" 
    GROUP BY t1.uuid 
) as names, 
(
    SELECT GROUP_CONCAT(name) 
    FROM tags as t2 
    WHERE t2.uuid = tr.uuid and t2.type = "tag" 
    GROUP BY t2.uuid 
) as tags 

FROM `tags` as tr 

phpMyAdmin的的转换：

CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` 
SQL SECURITY DEFINER 
VIEW `textagname` AS 
select 
`tr`.`uuid` AS `uuid`, 
`tr`.`creator` AS `creator`, 
(
    select group_concat(`t1`.`name` separator ',') AS `GROUP_CONCAT(name)` 
    from `tags` `t1` 
    where ((`t1`.`uuid` = `tr`.`uuid`) and (`t1`.`type` = 'name')) 
    group by `t1`.`uuid` 
) AS `names`, 
(
    select group_concat(`t2`.`name` separator ',') AS `GROUP_CONCAT(name)` 
    from `tags` `t2` 
    where ((`t2`.`uuid` = `tr`.`uuid`) and (`t2`.`type` = 'tag')) 
    group by `t2`.`uuid` 
) AS `tags` 
from `tags` `tr` 

任何想法，我怎样才能使我的观点更多的时间效率？

PS：这里是tags表结构：

Column Type   Null Default Comments 
------- ----------- ---- ------- ------------------ 
uuid  varchar(36) No    key of texture 
name  varchar(64) No    tag name 
creator varchar(36) Yes NULL  creator of the tag 
type  varchar(36) No    name, or tag 

Answer 1

真的不能解释为什么当转换成phpMyAdmin的视图查询越来越慢，但我会尝试下面的查询，而不是：

SELECT 
    uuid, 
    creator, 
    GROUP_CONCAT(CASE type WHEN 'name' THEN name END) AS names, 
    GROUP_CONCAT(CASE type WHEN 'tag' THEN name END) AS tags 
FROM tags 
WHERE type IN ('name', 'tag') 
GROUP BY 
    uuid, 
    creator