Question

我正在尝试创建一个select语句来选择在前一个select语句中选择的字段，如下面的代码所示（使用oracle 11g）：

    Declare 
    type NumberArray IS TABLE OF Number;
    v_medium NumberArray;
    v_medium_final NumberArray := NumberArray(); 
    v_count number;
    type VarcharArray IS TABLE OF VARCHAR2(60);
    v_Type VarcharArray
    --Select all Regions and Locality affected by the fault
    cursor Locality_cur is
      Select LocalityCode from AvaFaultLocality where FAULTID=36841 and SITEID=1;
      Locality_rec Locality_cur%ROWTYPE;
    cursor Region_cur is
      Select RegionCode  from avafaultregion where FAULTID=36841 and SITEID=1;
      Region_rec Region_cur%ROWTYPE;
Begin
      v_count := 1; 
      FOR Region_rec IN Region_cur
      LOOP
        dbms_output.put_line(Region_rec.RegionCode);
        Select RECIPIENTMEDIUMID BULK COLLECT into v_medium from  AvaRecipientAreaRegion where RegionCode = Region_rec.RegionCode;

       FOR idx IN 1..v_medium.COUNT LOOP
         v_medium_final.extend(); 
         v_medium_final(v_count) := v_medium(idx); 
         dbms_output.put_line(TO_CHAR(v_medium(idx)));
         v_count:= v_count + 1;
       END LOOP;  
       dbms_output.put_line('End Loop for Region '||Region_rec.RegionCode);     
      END LOOP;
      dbms_output.put_line(TO_CHAR(v_medium_final.count));
      Select MEDIUMTYPECODE BULK COLLECT into v_Type from AvaRecipientMedium where RECIPIENTMEDIUMID in (SELECT * FROM TABLE(v_medium_final)); <--- Line with problem
End;

我要做的主要是选择所有区域的内容，循环此结果并获取这些区域中所有位置的内容，然后获取每个区域的所有RecipientMediumID并将结果添加到名为的变量中v_medium_final。这部分工作得很好。问题是当我尝试使用此选择的结果来选择RecipientMedium表中的值时，其中所有值都在变量v_medium_final中。

我尝试使用：

Select MEDIUMTYPECODE BULK COLLECT into v_Type from AvaRecipientMedium where RECIPIENTMEDIUMID in (SELECT * FROM TABLE(v_medium_final));

或

Select MEDIUMTYPECODE BULK COLLECT into v_Type from AvaRecipientMedium where RECIPIENTMEDIUMID in v_medium_final;

但我总是得到错误：

 [Error] Execution (32: 126): ORA-06550: line 32, column 126:
PLS-00642: local collection types not allowed in SQL statements
ORA-06550: line 32, column 120:
PL/SQL: ORA-22905: cannot access rows from a non-nested table item
ORA-06550: line 32, column 7:
PL/SQL: SQL Statement ignored

并针对第二种情况： [错误]执行（32：106）：ORA-06550：第32行，第106列：

PLS-00642: local collection types not allowed in SQL statements

Answer 1

如错误所示，您无法使用本地收集类型。您需要使用在SQL级别定义的集合类型。

CREATE TYPE NumberArray
    AS TABLE OF NUMBER;

DECLARE
  v_medium NumberArray;
  ...

这将要求您拥有CREATE TYPE权限，这意味着任何有权限查看它的人都可以看到您的类型定义，而不是只有PL / SQL块的范围。

就个人而言，我会避免在Array的集合类型名称中使用VARRAY，因为名称可能会令人困惑。如果我看到类型NumberArray，我猜它被定义为VARRAY(n) OF NUMBER而不是嵌套表类型。对嵌套表类型使用ntt后缀似乎更合理（create type number_ntt as table of number）。

使用类型＆＃34;是表＃34;在一个选择语句中

1 个答案: