Question

我有一个过程，我试图在where语句中使用一个集合。

 procedure purge_table is

    type t_ids is table of number;
    arr_ids    t_ids ;

   begin  
   select distinct (s.id) bulk collect
              into arr_ids    
        from students s;

   select count(*)
      into v_deleted_row_count
      from students s
      where s.id in (select * from table(arr_ids));

   end;

对于包含where语句的行，我得到了“ SQL语句中不允许使用本地集合类型”。据我所知语法正确，我一直在搜索错误，但我不知道该怎么做 “假设您的集合是在SQL中定义的，而不仅仅是在PL / SQL中定义，则可以使用TABLE运算符” 此处在接受的答案中提到：Array in IN() clause oracle PLSQL。

也是这里接受的答案

https://dba.stackexchange.com/questions/141325/how-can-i-use-an-array-variable-inside-the-in-operator-for-oracle-sql

建议与我做同样的事情。

我想它必须与在SQL中定义一个集合有关。你能帮我吗？

Answer 1

类型应在SQL级别创建，然后在PL / SQL过程中使用。这样的事情（基于Scott的模式）：

SQL> set serveroutput on
SQL> create or replace type emp_tab as table of number;
  2  /

Type created.

SQL> create or replace procedure purge_table is
  2      arr_ids    emp_tab := emp_tab();
  3      v_deleted_row_Count number;
  4  begin
  5     select distinct (s.empno) bulk collect
  6       into arr_ids
  7       from emp s where deptno = 10;
  8
  9     select count(*)
 10        into v_deleted_row_count
 11        from emp s where s.empno in (select * from table(arr_ids));
 12
 13     dbms_output.put_line('Number = ' || v_deleted_row_count);
 14  end;
 15  /

Procedure created.

SQL> exec purge_table;
Number = 3

PL/SQL procedure successfully completed.

SQL>

即使我使用“表”运算符，也会获得“ SQL语句中不允许的本地集合类型”

1 个答案: