我有一个关于在Oracle SQL函数中使用集合的问题。

包中有类型的定义：

/* Types of package*/
create or replace PACKAGE "test" AS

TYPE type_record_1 IS record ( id_num NUMBER , timestamp_num NUMBER,value NUMBER);
TYPE type_table_1 IS TABLE OF type_record_1; 
TYPE type_record_2 IS record ( id_num NUMBER , timestamp_num NUMBER,pValue NUMBER);
TYPE type_table_2 IS TABLE OF type_record_2; 
END test;

问题出在功能_2中。function_2使用来自function_1的输出。当我尝试在function_2中进行选择时，会出现错误消息。错误消息“
SQL语句中不允许使用本地集合类型”。

能否请你帮忙？在函数中使用集合有什么问题？

/*function 1*/
FUNCTION function_1
RETURN  type_table_1
IS
table_1 type_table_1;
BEGIN
-- select values from
SELECT id_num, timestamp_num, value --type_record_1 (id_num, timestamp_num, value) 
BULK COLLECT INTO table_1 
    FROM (
      SELECT       
        l.id_num,
        EXTRACT(hour from end_time) * 60 + EXTRACT(minute from end_time) as timestamp_num,
        l.value
      FROM INTERVAL_F l
      WHERE id_num IN (SELECT id_num FROM table_rev)
    );

 RETURN table_1;

 END function_1;


 /*function 2*/
 FUNCTION function_2
         (
          table_1 IN type_table_1
          )
 RETURN type_table_2
 IS 
 table_2 type_table_2;
 BEGIN

 SELECT type_record_2(id_num , timestamp_num , pValue)
 BULK COLLECT INTO table_2 FROM (
 SELECT  id_num
       , timestamp_num 
       , value as pValue
       FROM table(table_1)  -- ERROR IS HERE
       );

 RETURN table_2;
 END function_2;