mybatis where-if中if不能识别大写AND，OR

mybatis报错:Caused by: org.apache.ibatis.ognl.ParseException: Encountered " "AND “” at line 1

错误代码：

  
  	SELECT ct.customer_name customerName,sam.city_code,sam.user_name,sam.account_name
		FROM sys_account_manager sam LEFT JOIN sys_customer ct ON ct.id = sam.customer_id 
	  WHERE sam.deleted = 0
	  
	  	AND ct.customer_name LIKE concat('%',#{customerName},'%')
	  
	  
	  	AND LOCATE(#{cityCode},sam.city_code)
	  
	  order by status,account_validity_time DESC
  

正确代码：
原因是：if条件中AND为大写，大写不能识别，应改为小写。

  	SELECT ct.customer_name customerName,sam.city_code,sam.user_name,sam.account_name
		FROM sys_account_manager sam LEFT JOIN sys_customer ct ON ct.id = sam.customer_id 
	  WHERE sam.deleted = 0
	  
	  	AND ct.customer_name LIKE concat('%',#{customerName},'%')
	  
	  
	  	AND LOCATE(#{cityCode},sam.city_code)
	  
	  order by status,account_validity_time DESC