Question

当SELECT仅与CELLS表一起使用时，代码可以正常工作。但是，当有来自多个表的连接时，下面的类型不再合适。

PROCEDURE drawComponent(title IN VARCHAR2, tbl IN VARCHAR2, link IN VARCHAR2) IS

TYPE ref_typ IS REF CURSOR;
var_ref ref_typ;
rec CELLS%ROWTYPE;

BEGIN
    OPEN var_ref FOR 'SELECT CELLS.ID as CELLID, CELLS.NUM as CELLNUM, CELLS.' || link || ' as ID, ' || tbl || '.REMOVED as REMOVED FROM CELLS LEFT OUTER JOIN ' || tbl || ' ON CELLS.' || link || ' = ' || tbl || '.ID ORDER BY CELLS.NUM';

    loop
        FETCH var_ref INTO rec;
        EXIT WHEN var_ref%NOTFOUND;
        htp.p(rec.CELLID);
    end loop;
END;

问题是我应该声明rec的哪种类型？

Answer 1

您无法获取弱动态参考光标的记录类型。

因此，您最好的选择可能是根据您需要的各种列的类型定义自定义RECORD。喜欢的东西：

...

TYPE rec_typ IS RECORD (
  CELLID CELLS.ID%TYPE,
  CELLNUM CELLS.NUM%TYPE,
  ID NUMBER,     -- or whatever type suits your needs
  REMOVED NUMBER  -- or whatever type suits your needs
);
rec rec_type;

...

访问连接的元素

1 个答案: