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所以我正在尝试构建一个函数来返回包含在某些客户端订阅中的项目的记录。

所以我一直在建立以下内容：

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个功能：

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 返回一个包含 2 列的表，其中包含表 PROGRAMS_FT 中包含在用户访问中的所有记录。

出于某种原因，我收到了编译警告 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，就会发生这种情况，而我在这里看不到这种情况。

4

1 回答 1

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您正在选择两个标量值并尝试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 的一个无益的怪癖，它说“没有足够的值”而不是“太多的值”，正如您在尝试将两件事合二为一时所期望的那样；我相信我想出了一个相当有说服力的解释/借口一次，但它现在逃脱了我......）

我不确定你的循环是否有意义。假设您的游标查询返回多行，每次循环时您都在替换集合的内容SELECTED_PGM- 您可能认为您正在附加到它，但这不是它的工作方式。因此，您最终将仅根据循环的最终迭代返回一个集合。

聚合然后拆分数据似乎也需要做很多工作。你也许可以为那些使用集合；但是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，这样会更有效，并且允许您对所有组合数据进行一次批量收集。

于 2019-06-05T17:58:25.720 回答