Sql ORA-00904:无效标识符（SP）

我试图编写一个存储过程：

Procedure get_cont(
                          docNum in number default null,
                          state in number default null,
                          department in varchar2,
                          dateF in varchar2 default null,
                          IOCURSOR OUT v_cursor)
IS
vSelectCursor varchar2(10000);

BEGIN

    vSelectCursor :=    'SELECT DISTINCT(cb.DOC_NUM),
                                 to_char(cb.DATE_INIT,''DD/MM/YYYY'') date_init,                     
                                 cb.DEPT,
                                 dt.STATE,
                                 dt.NAME
                         FROM department cb,
                              db_book dt
                         WHERE cb.code = dt.code
                               AND cb.DEST = ''MIT2'' 
                                 ';

    IF docNum IS NOT NULL THEN               
         vSelectCursor := vSelectCursor || ' AND det.DOC_NUM = ' || docNum ;
    END IF;
    IF state <> -1 THEN               
         vSelectCursor := vSelectCursor || ' AND cb.STATE = ' || state ;
    END IF;
    IF department <> '-' THEN               
         vSelectCursor := vSelectCursor || ' AND cb.DEPT = ' || department;  --this statement is incorrect
    END IF;

   OPEN IOCURSOR FOR vSelectCursor;
END;

---

在生成的查询中，您需要将department is单引号括起来，因为它是一个字符串，其中其他都是数字：

IF department <> '-' THEN               
    vSelectCursor := vSelectCursor || ' AND cb.DEPT = ''' || department || '''';
END IF;

如果部门为“-”，则
vSelectCursor:=vSelectCursor | |和cb.DEPT=''| | |''；
如果结束；

IF department <> '-' THEN               
    vSelectCursor := vSelectCursor || ' AND cb.DEPT = ''' || department || '''';
END IF;