Pl/SQL过程CURSOR For循环

Question

我是PL/SQL新手并尝试使用CURSOR.我想验证一个插入过程,所以我写了另一个程序来这样做.

CREATE OR REPLACE PROCEDURE verify_insert

IS

   CURSOR map_cur IS

      SELECT Page_ID_NBR, Page_Type, Page_Dcpn FROM SSC_Page_Map;

      map_rec map_cur%ROWTYPE;

BEGIN

   OPEN map_cur;

   FOR map_rec in map_cur

   LOOP

      DBMS_OUTPUT.PUT_LINE('ID: ' || map_cur.Page_ID_NBR || ' ' || 'Type' ||  map_cur.Page_Type || ' ' || 'Description' || map_cur.Page_Dcpn);   

   END LOOP;

   CLOSE map_cur;

END;

SHOW ERRORS PROCEDURE verify_insert;

我收到以下消息

[Warning] ORA-24344: success with compilation error
19/44   PLS-00225: subprogram or cursor 'MAP_CUR' reference is out of scope
19/5    PL/SQL: Statement ignored
(47: 0): Warning: compiled but with compilation errors

我也看到了

Errors for PROCEDURE VERIFY_INSERT

LINE/COL ERROR                                                            
-------- -----------------------------------------------------------------
19/44    PLS-00225: subprogram or cursor 'MAP_CUR' reference is out of sco


19/5     PL/SQL: Statement ignored                                        

正如我写的那样,我是新手,并试图将网络上的PL/SQL知识拼凑起来Oracle PL/SQL Programming (Feuerstein).聚在一起,但没有我想要的那么快.

Answer 1

你的循环从光标中取出一行到记录类型.在循环内部,您需要从记录类型中读取数据.在您的dbms_output.put_line通话中,您需要引用记录而不是光标.

DBMS_OUTPUT.PUT_LINE('ID: ' || map_rec.Page_ID_NBR || 
              ' ' || 'Type' || map_rec.Page_Type || 
              ' ' || 'Description' || map_rec.Page_Dcpn);