mybatis的Mapper.xml文件SQL語句BadSqlGrammarException之FUNCTION錯誤系列

想必各位在開發過程當中必定使用過：統計的功能，用到了不少SQL的函數，因而就直接寫在Mapper文件中了；

好比：

member_num,MAX(ID) AS newestLoanID,MIN (ID) AS earlyLoanID,SUM(applied_amount) AS sumLoansAmount,status

select          

member_num,MAX(ID) AS newestLoanID,MIN (ID) AS earlyLoanID,SUM(applied_amount) AS sumLoansAmount,status

         from credit_loan_record ......

看似沒有啥問題；

執行的時候報錯了！

 

java.lang.RuntimeException: org.springframework.jdbc.BadSqlGrammarException: 

### Error querying database.  Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: FUNCTION credit_center.MIN does not exist. Check the 'Function Name Parsing and Resolution' section in the Reference Manual

因而拿到mysql的客戶端工具來執行！一樣的錯誤！！

那麼可想而知，真的是SQL的問題了，因而咱們美化一下SQL

SELECT
member_num,
MAX( ID ) AS newestLoanID,
MIN( ID ) AS earlyLoanID,
SUM( applied_amount ) AS sumLoansAmount,
STATUS
FROM
credit_loan_record
WHERE
member_num = 18810875228
AND deleted = 0

居然經過了！！！

等等！好像異常裏面有提示！ FUNCTION credit_center.MIN does not exist.

MIN (ID) AS earlyLoanID　　——居然有空格
優化以後：MIN( ID ) AS earlyLoanID,
而後就不報錯！

因此，若是之後提示：FUNCTION XXXXX.MIN does not exist.時候，記得看看是否是有空格啊！或者寫的不夠嚴謹