plsql – 创建返回表的Oracle函数

我试图在包中创建一个返回一个表的函数.我希望在包中调用该函数一次,但是可以多次重用数据.虽然我知道我在Oracle中创建了临时表,但我希望能够将事情保持在干燥状态.

到目前为止,这是我所拥有的：

CREATE OR REPLACE PACKAGE TEST AS 
 
    TYPE MEASURE_RECORD IS RECORD (
      L4_ID VARCHAR2(50),L6_ID VARCHAR2(50),L8_ID VARCHAR2(50),YEAR NUMBER,PERIOD NUMBER,VALUE NUMBER
    );
 
    TYPE MEASURE_TABLE IS TABLE OF MEASURE_RECORD;
 
    FUNCTION GET_UPS(
      TIMESPAN_IN IN VARCHAR2 DEFAULT 'MONTLHY',STARTING_DATE_IN DATE,ENDING_DATE_IN DATE  
    ) RETURN MEASURE_TABLE;
 
END TEST;

身体：

CREATE OR REPLACE PACKAGE BODY TEST AS 
 
  FUNCTION GET_UPS (
    TIMESPAN_IN IN VARCHAR2 DEFAULT 'MONTLHY',ENDING_DATE_IN DATE
  ) RETURN MEASURE_TABLE IS
 
    T MEASURE_TABLE;
 
  BEGIN
 
        SELECT  ...
        INTO    T
        FROM    ...
 
      ;
 
  RETURN T;
 
  END GET_UPS;
 
END TEST;

头部编译,身体没有.一个错误信息是’不足够的值’,这可能意味着我应该选择MEASURE_RECORD而不是MEASURE_TABLE.

我失踪了什么

我想你想要一个 pipelined table function.

这样的事情

CREATE OR REPLACE PACKAGE test AS
 
    TYPE measure_record IS RECORD(
       l4_id VARCHAR2(50),l6_id VARCHAR2(50),l8_id VARCHAR2(50),year NUMBER,period NUMBER,VALUE NUMBER);
 
    TYPE measure_table IS TABLE OF measure_record;
 
    FUNCTION get_ups(foo NUMBER)
        RETURN measure_table
        PIPELINED;
END;
 
CREATE OR REPLACE PACKAGE BODY test AS
 
    FUNCTION get_ups(foo number)
        RETURN measure_table
        PIPELINED IS
 
        rec            measure_record;
 
    BEGIN
        SELECT 'foo','bar','baz',2010,5,13
          INTO rec
          FROM DUAL;
 
        -- you would usually have a cursor and a loop here   
        PIPE ROW (rec);
 
        RETURN;
    END get_ups;
END;

为了简单起见,我删除了你的参数,并没有在函数中实现循环,但是你可以看到原理.

用法：

SELECT *
  FROM table(test.get_ups(0));
 
 
 
L4_ID L6_ID L8_ID       YEAR     PERIOD      VALUE
----- ----- ----- ---------- ---------- ----------
foo   bar   baz         2010          5         13
1 row selected.

plsql – 创建返回表的Oracle函数

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