Question

我正在尝试编写一个函数，根据用户在月度报告中所做的选择来显示月度数据的值。下面的代码片段只是尝试获取嵌套表中的值，一旦数据在嵌套表中成功加载，我将调用该函数来显示表。我尝试了一些东西;但在加载数据时遇到了问题。下面是2个不同的SQL来创建这个函数，但是它们都有关于错误值的相同错误;我尝试过一些东西，但无济于事：

摘录1：

/* Formatted on 10/16/2012 8:40:45 AM (QP5 v5.215.12089.38647) */

CREATE OR REPLACE TYPE tempObject AS OBJECT
(
   kpiid number,
   kpigroup VARCHAR2 (300)
);

CREATE OR REPLACE TYPE tempTable AS TABLE OF tempObject;


CREATE OR REPLACE FUNCTION KPI_HORIZON.Monthly_All_Data (
   mainarea IN VARCHAR2)

   RETURN tempTable
IS
   MonthlyData   temptable := temptable ();
   n             INTEGER := 0;

BEGIN

   IF (mainarea = 'ALL')

   THEN
      FOR r IN (SELECT DISTINCT kpiid, kpigroup
                  FROM kpi_summary_reporting
                 WHERE kpifrequency = 'Monthly' AND active_ind = 'Y')
      LOOP
         monthlydata.EXTEND;
         n := n + 1;
         monthlydata (n) := tempobject (r.kpiid, r.kpigroup);
      END LOOP;
  END IF;

   RETURN MonthlyData;
END;

错误：[错误] PLS-00306（26:29）：PLS-00306：调用'TEMPOBJECT'时参数的数量或类型错误

Snippet2：

/* Formatted on 10/16/2012 8:27:22 AM (QP5 v5.215.12089.38647) */
CREATE OR REPLACE TYPE tempObject AS OBJECT
(
   kpiid NUMBER,
   kpigroup VARCHAR2 (300)
);

CREATE OR REPLACE TYPE tempTable AS TABLE OF tempObject;


CREATE OR REPLACE FUNCTION KPI_HORIZON.Monthly_All_Data (
   mainarea IN VARCHAR2)
   RETURN tempTable
AS
   MonthlyData   temptable := temptable ();
BEGIN
   IF (mainarea = 'ALL')
   THEN
      SELECT DISTINCT ksr.kpiid, ksr.kpigroup
        INTO MonthlyData 
        FROM kpi_summary_reporting ksr
       WHERE kpifrequency = 'Monthly' AND active_ind = 'Y';
   ELSE
      SELECT DISTINCT kpiid, kpigroup
        INTO MonthlyData
        FROM kpi_summary_reporting;
   END IF;

   RETURN MonthlyData;
END;

错误：[错误] ORA-00947（24：9）：PL / SQL：ORA-00947：值不够

Answer 1

我会做这样的事情，假设数据足够小，将它完全加载到服务器的PGA中的嵌套表中真的很有意义。如果数据量较大，则可能需要使用流水线表函数。

由于嵌套表是对象类型表，因此需要使用对象类型构造函数。

CREATE OR REPLACE FUNCTION KPI_HORIZON.Monthly_All_Data (
   mainarea IN VARCHAR2)
   RETURN tempTable
IS
   MonthlyData   temptable;
BEGIN
   IF (mainarea = 'ALL')
   THEN
      SELECT tempObject( kpiid, kpigroup )
        BULK COLLECT INTO monthlydata
        FROM kpi_summary_reporting
       WHERE kpifrequency = 'Monthly' 
         AND active_ind = 'Y';
   END IF;

   RETURN MonthlyData;
END;

当我在查询中看到DISTINCT时，我总是怀疑。您真的希望获得需要删除的重复行吗？如果没有，我会像上面那样删除DISTINCT。如果您确实需要DISTINCT，那么您的对象类型将需要MAP或ORDER方法，这会使示例复杂化。

演示此工作

SQL> CREATE OR REPLACE TYPE tempObject AS OBJECT
  2  (
  3     kpiid NUMBER,
  4     kpigroup VARCHAR2 (300)
  5  );
  6  /

Type created.

SQL> CREATE OR REPLACE TYPE tempTable AS TABLE OF tempObject;
  2  /

Type created.

SQL> create table kpi_summary_reporting (
  2  kpiid integer,
  3  kpigroup varchar2(300),
  4  kpifrequency varchar2(30),
  5  active_ind varchar2(1)
  6  );

Table created.

SQL> insert into kpi_summary_reporting values( 1, 'Foo', 'Monthly', 'Y' );

1 row created.

SQL> ed
Wrote file afiedt.buf

  1  CREATE OR REPLACE FUNCTION Monthly_All_Data (
  2     mainarea IN VARCHAR2)
  3     RETURN tempTable
  4  IS
  5     MonthlyData   temptable;
  6  BEGIN
  7     IF (mainarea = 'ALL')
  8     THEN
  9        SELECT tempObject( kpiid, kpigroup )
 10          BULK COLLECT INTO monthlydata
 11          FROM kpi_summary_reporting
 12         WHERE kpifrequency = 'Monthly'
 13           AND active_ind = 'Y';
 14     END IF;
 15     RETURN MonthlyData;
 16* END;
 17  /

Function created.

SQL> select monthly_all_data( 'ALL' ) from dual;

MONTHLY_ALL_DATA('ALL')(KPIID, KPIGROUP)
--------------------------------------------------------------------------------
TEMPTABLE(TEMPOBJECT(1, 'Foo'))

无法将值存储到oracle中的嵌套表中

1 个答案: