“截断不正确INTEGER值”错误

Question

我越来越Truncated incorrect INTEGER value: 'D'警告，而我试图运行下面的查询：

UPDATE MESSAGES 
SET status = CASE 
    WHEN 
    (from_id='111111111' AND status='A') THEN 'S' 
    WHEN 
    (to_id ='111111111' AND status='A') THEN 'R' 
    WHEN 
    ((from_id ='111111111' AND status='R') OR 
    (to_id ='111111111' AND status='S')) THEN 'D' 
    END 
WHERE primary_key = '236499681204' 
AND 
    (CASE 
    WHEN 
    (from_id='111111111' AND status='A') THEN 'S' 
    WHEN 
    (to_id ='111111111' AND status='A') THEN 'R' 
    WHEN 
    ((from_id ='111111111' AND status='R') OR 
    (to_id ='111111111' AND status='S')) THEN 'D' 
    END) is not null 

我看了帖子MySQL 'Truncated incorrect INTEGER value'和MYSQL Truncated incorrect INTEGER value error。但他们不适用于我的情况。这里，status是VARCHAR(1)的类型。

有什么我失踪了吗？

编辑

这里的查询创建表：

CREATE TABLE `MESSAGES` (
    `primary_key` bigint(12) unsigned NOT NULL AUTO_INCREMENT, 
    `from_id` varchar(9) NOT NULL, 
    `to_id` varchar(9) NOT NULL, 
    `status` varchar(1) NOT NULL, 
    PRIMARY KEY (`primary_key`) 
) ENGINE=MyISAM AUTO_INCREMENT=123456789876 DEFAULT CHARSET=latin1 

请帮助:(

Answer 1

这是不是因为status但由于比较

(CASE 
    WHEN 
    (from_id='111111111' AND status='A') THEN 'S' 
    WHEN 
    (to_id ='111111111' AND status='A') THEN 'R' 
    WHEN 
    ((from_id ='111111111' AND status='R') OR 
    (to_id ='111111111' AND status='S')) THEN 'D' 
END) is not null 

避免错误，投CASE结果为CHAR这样的：

CAST((CASE 
    WHEN 
    (from_id='111111111' AND status='A') THEN 'S' 
    WHEN 
    (to_id ='111111111' AND status='A') THEN 'R' 
    WHEN 
    ((from_id ='111111111' AND status='R') OR 
    (to_id ='111111111' AND status='S')) THEN 'D' 
END) AS CHAR) is not null 

现在它应该工作正常:)