毕业设计Spring boot问题记录（后端三)：java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax；

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Caused by: java.sql.SQLSyntaxErrorException: 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 'describe,state  FROM sys_role 
 
 WHERe (id_role IN (select id_role from sys_use' at line 1

{
    "msg": "rn### Error querying database.  Cause: java.sql.SQLSyntaxErrorException: 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 'describe,state  FROM sys_role n n WHERe (id_role IN (select id_role from sys_use' at line 1rn### The error may exist in com/vuespringboot/mapper/RoleMapper.java (best guess)rn### The error may involve defaultParameterMaprn### The error occurred while setting parametersrn### SQL: SELECt  id_role,roleName,roleCode,describe,state  FROM sys_role     WHERe (id_role IN (select id_role from sys_user_role where id_user = 1))rn### Cause: java.sql.SQLSyntaxErrorException: 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 'describe,state  FROM sys_role n n WHERe (id_role IN (select id_role from sys_use' at line 1n; bad SQL grammar []; nested exception is java.sql.SQLSyntaxErrorException: 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 'describe,state  FROM sys_role n n WHERe (id_role IN (select id_role from sys_use' at line 1",
    "code": 400
}

java.sql.SQLSyntaxErrorException: 
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
 'describe,
 state  
 FROM 
 	sys_role 
 WHERe 
	 (id_role IN 
	 	(select 
	 		id_role 
	 	from 
	 		sys_use' at line 1

从报错上来看，是SQL语言写错了，但是我在项目中找了很久，关于报错中提出的sql代码，我好像自己并没有写过啊，这让我感到很奇怪，是不是系统拼接sql语句的时候出问题了。
但是通过逐语句调试，我发现我出现错误的语句是这样一句话：

final List roles = this.roleService.list(new QueryWrapper()
               .inSql("id_role", "select id_role from sys_user_role where id_user = " + userId));

而且当我测试this.roleService.list()语句时，依然出现报错，但是这句语句按道理不应该有错误呀，我也没有覆写过list()方法，于是我突然意识到，可能是自己在UserMapper.xml中写的sql语句出现了问题。

但是经过反复测试，确实没有在UserMapper中有错误的sql语句，最终，我还是回归到RoleService本身，再次观察报错信息：describe, state FROM ……

我突然意识到了说明，describe和state是我在表中列的列名，会不会是列名个mybitas冲突了呢？state在各个表中都有使用，我尝试了其它几个表，没有出现任何问题，于是我把目光锁定到了describe上。

我进入sql表，讲describe列名改为了roleDescribe，果不其然，之后程序就恢复了正常，list()方法也可以正常使用了。