截断不正确INTEGER值：'％'在Java和MySQL中

Question

我使用Java和MySQL进行名称搜索，然后才用于连接Oracle并且一切运行良好，现在我更改为迁移到MYSQL并查看错误..

MySQL的：

SELECT CAR.ID AS ID, 
    CAR.NAME AS NAME, 
    CAT.ID AS CATEGORY_ID, 
    CAT.NAME AS CATEGORY_NAME, 
    C.ID AS CITY_ID, 
    C.NAME AS CITY_NAME, 
FROM CARS CAR,  
    CATEGORY CAT, 
    CITY C 
WHERE LOWER(CAR.NAME) LIKE '%'||LOWER(?)||'%' 
    AND CAR.CATEGORY_ID   = CAT.ID 
    AND D.CITY_ID    = C.ID 
ORDER BY CAT.NAME, CAR.NAME 

当部署和调试进行搜索查询，它发生了一个错误：

日志消息：

SqlExceptionHelper - SQL Error: 1114, SQLState: HY000 
SqlExceptionHelper - The table 'C:\Windows\TEMP\#sql730_a_47' is full 
HibernateUtils - error at HibernateUtils.getListResult: could not extract ResultSet 
SqlExceptionHelper - SQL Warning Code: 1292, SQLState: HY000 
SqlExceptionHelper - Truncated incorrect INTEGER value: '%' 
SqlExceptionHelper - SQL Warning Code: 1114, SQLState: HY000 
SqlExceptionHelper - The table 'C:\Windows\TEMP\#sql730_a_47' is full 

MySQL表示：

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '?)||'%' 
    AND CAR.CATEGORY_ID   = CAT.ID at line 50 

我怎样才能解决这个问题？非常感谢

Answer 1

你的问题是（最初）标记为MySQL和Oracle。问题本身和错误强烈表明MySQL是数据库（例如Oracle不会产生MySQL错误）。

MySQL不使用||进行字符串连接。写你的查询正确的方法是：

SELECT CAR.ID AS ID, CAR.NAME AS NAME, CAT.ID AS CATEGORY_ID, 
     CAT.NAME AS CATEGORY_NAME, C.ID AS CITY_ID, C.NAME AS CITY_NAME, 
FROM CARS CAR JOIN  
    CATEGORY CAT 
    ON CAR.CATEGORY_ID = CAT.ID JOIN 
    CITY C 
    ON D.CITY_ID = C.ID 
WHERE LOWER(CAR.NAME) LIKE CONCAT('%', LOWER(?), '%') 
ORDER BY CAT.NAME, CAR.NAME; 

还要注意正确的使用JOIN语法。

Answer 2

相反的：

LIKE '%'||LOWER(?)||'%' 

您可以使用：

"...LIKE LOWER('%"+ str.toLowerCase() +"%')" 

或者：

Query query = "...LIKE LOWER('%?%')"; 
query.setParameter(1, str.toLowerCase());