参数为xm WITH T1 AS ( SELECT 'A' AS "Ⅰ_员工姓名" FROM DUAL UNION ALL SELECT 'B' FROM DUAL ) SELECT * FROM T1 ${if(len(xm) = 0 ,"" , "where Ⅰ_员工姓名 ='"+xm+"'")}那么,不更换别名的情况下, ${if(len(xm) = 0 ,"" , "where Ⅰ_员工姓名 ='"+xm+"'")} 这里该如何识别双引号
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