从mysql中的xml中提取值

我试图从xml中提取值.我在xml具有属性时遇到问题.
喜欢以下存储过程

DELIMITER $$
DROP PROCEDURE IF EXISTS `excel`.`insert_items` $$
CREATE DEFINER=`root`@`localhost` PROCEDURE `insert_items`()
BEGIN
SET @xml = '<items><item>
        <value columntype="0">Single Line Text_01</value>
    <value columntype="1">Single Line Text_12341</value>
    <value columntype="2">Single Line Text_21</value>
    <value columntype="3">Single Line Text_31</value>
    <value columntype="4">Single Line Text_41</value>
    </item>
</items>';
SELECT @columntype, ExtractValue(@xml, 'items/item/value[items/item/value/@columntype=0]');    
END $$
DELIMITER ;

解决方法:

获取具有属性columntype =“0”的元素的值

SELECT ExtractValue(@xml, 'items/item/value[@columntype=0]') value;

输出：

|               VALUE |
-----------------------
| Single Line Text_01 |

SQLFiddle