ORA-00947 函数返回 table 条记录的值不足

Question

所以我正在尝试构建一个函数，该函数 return 包含某些客户订阅中的项目记录。

所以我一直在构建以下内容：

2种：

CREATE OR REPLACE TYPE PGM_ROW AS OBJECT
    (
        pID      NUMBER(10),
        pName    VARCHAR2(300)
    );

CREATE OR REPLACE TYPE PGM_TAB AS TABLE OF PGM_ROW;

1 个函数：

CREATE OR REPLACE FUNCTION FLOGIN (USER_ID NUMBER) RETURN PGM_TAB
AS  
    SELECTED_PGM   PGM_TAB;
BEGIN
    FOR RESTRICTION
        IN (  SELECT (SELECT LISTAGG (ID_CHANNEL, ',')
                                 WITHIN GROUP (ORDER BY ID_CHANNEL)
                        FROM (SELECT DISTINCT CHA2.ID_CHANNEL
                                FROM CHANNELS_ACCESSES CHA2
                                     JOIN CHANNELS CH2
                                         ON CH2.ID = CHA2.ID_CHANNEL
                               WHERE     CHA2.ID_ACCESS = CMPA.ID_ACCESS
                                     AND CH2.ID_CHANNELS_GROUP = CG.ID))
                         AS channels,
                     (SELECT LISTAGG (ID_SUBGENRE, ',')
                                 WITHIN GROUP (ORDER BY ID_SUBGENRE)
                        FROM (SELECT DISTINCT SGA2.ID_SUBGENRE
                                FROM SUBGENRES_ACCESSES SGA2
                                     JOIN CHANNELS_ACCESSES CHA2
                                         ON CHA2.ID_ACCESS = SGA2.ID_ACCESS
                                     JOIN CHANNELS CH2
                                         ON CH2.ID = CHA2.ID_CHANNEL
                               WHERE     SGA2.ID_ACCESS = CMPA.ID_ACCESS
                                     AND CH2.ID_CHANNELS_GROUP = CG.ID))
                         AS subgenres,
                     CG.NAME,
                     A.BEGIN_DATE,
                     A.END_DATE,
                     CMP.PREVIEW_ACCESS
                FROM USERS U
                     JOIN COMPANIES_ACCESSES CMPA
                         ON U.ID_COMPANY = CMPA.ID_COMPANY
                     JOIN COMPANIES CMP ON CMP.ID = CMPA.ID_COMPANY
                     JOIN ACCESSES A ON A.ID = CMPA.ID_ACCESS
                     JOIN CHANNELS_ACCESSES CHA
                         ON CHA.ID_ACCESS = CMPA.ID_ACCESS
                     JOIN SUBGENRES_ACCESSES SGA
                         ON SGA.ID_ACCESS = CMPA.ID_ACCESS
                     JOIN CHANNELS CH ON CH.ID = CHA.ID_CHANNEL
                     JOIN CHANNELS_GROUPS CG ON CG.ID = CH.ID_CHANNELS_GROUP
               WHERE U.ID = USER_ID
            GROUP BY CG.NAME,
                     A.BEGIN_DATE,
                     A.END_DATE,
                     CMPA.ID_ACCESS,
                     CG.ID,
                     CMP.PREVIEW_ACCESS)
    LOOP
        SELECT PFT.ID_PROGRAM, PFT.LOCAL_TITLE
          BULK COLLECT INTO SELECTED_PGM
          FROM PROGRAMS_FT PFT
         WHERE     PFT.ID_CHANNEL IN
                       (    SELECT TO_NUMBER (
                                       REGEXP_SUBSTR (RESTRICTION.CHANNELS,
                                                      '[^,]+',
                                                      1,
                                                      ROWNUM))
                              FROM DUAL
                        CONNECT BY LEVEL <=
                                   TO_NUMBER (
                                       REGEXP_COUNT (RESTRICTION.CHANNELS,
                                                     '[^,]+')))
               AND PFT.ID_SUBGENRE IN
                       (    SELECT TO_NUMBER (
                                       REGEXP_SUBSTR (RESTRICTION.SUBGENRES,
                                                      '[^,]+',
                                                      1,
                                                      ROWNUM))
                              FROM DUAL
                        CONNECT BY LEVEL <=
                                   TO_NUMBER (
                                       REGEXP_COUNT (RESTRICTION.SUBGENRES,
                                                     '[^,]+')))
               AND (PFT.LAUNCH_DATE BETWEEN RESTRICTION.BEGIN_DATE
                                        AND RESTRICTION.END_DATE);
    END LOOP;
    RETURN SELECTED_PGM;
END FLOGIN;

我希望函数 tu return a table 有 2 列，其中包含来自 table PROGRAMS_FT 的所有记录，这些记录包含在用户访问权限中。

出于某种原因，我收到编译警告 ORA-000947。我对错误代码的理解是，当插入的值与接收值的对象的类型不匹配时会发生错误代码，我在这里看不出这是怎么回事。

Answer 1

您正在选择两个标量值并试图将它们放入一个对象中。这不会自动发生，您需要将它们转换为一个对象：

...
    LOOP
        SELECT PGM_ROW(PFT.ID_PROGRAM, PFT.LOCAL_TITLE)
          BULK COLLECT INTO SELECTED_PGM
          FROM PROGRAMS_FT PFT
...

（这是 PL/SQL 的一个毫无用处的怪癖，它说 'not enough values' 而不是 'too many values'，正如您在尝试将两件事合二为一时可能期望的那样；我敢肯定有一次我想出了一个相当有说服力的 explanation/excuse 但它现在让我逃脱了......）

我不确定你的循环是否有意义。假设您的游标查询 returns 多行，每次围绕循环您替换 SELECTED_PGM 集合的内容 - 您可能认为您正在追加它，但这不是它的工作原理。因此，您最终将返回仅基于循环的最后一次迭代的集合。

聚合然后拆分数据似乎也需要大量工作。你也许可以为那些使用集合；但您可能可以摆脱游标和循环，并将游标查询与内部查询结合起来，这样效率更高，并且允许您对所有组合数据执行单个 bulk-collect。

ORA-00947 函数返回 table 条记录的值不足

ORA-00947 not enough values with function returning table of records

oracle

function

bulk-collect