我正在尝试在Oracle中编写一个自定义聚合函数，并将该函数与其他一些函数一起分组在一个包中。作为一个示例（为了模拟我遇到的问题），假设我的自定义聚合对数字进行求和看起来像：

CREATE OR REPLACE TYPE SUM_AGGREGATOR_TYPE AS OBJECT (
    summation NUMBER,

    STATIC FUNCTION ODCIAggregateInitialize(agg_context IN OUT
       SUM_AGGREGATOR_TYPE) RETURN NUMBER,

    MEMBER FUNCTION ODCIAggregateIterate(self IN OUT SUM_AGGREGATOR_TYPE,
        next_number IN NUMBER) RETURN NUMBER,

    MEMBER FUNCTION ODCIAggregateMerge(self IN OUT SUM_AGGREGATOR_TYPE,
        para_context IN SUM_AGGREGATOR_TYPE) RETURN NUMBER,

    MEMBER FUNCTION ODCIAggregateTerminate(self IN SUM_AGGREGATOR_TYPE,
        return_value OUT NUMBER, flags IN NUMBER) RETURN NUMBER
);

CREATE OR REPLACE TYPE BODY SUM_AGGREGATOR_TYPE IS

  STATIC FUNCTION ODCIAggregateInitialize(agg_context IN OUT
    SUM_AGGREGATOR_TYPE)
      RETURN NUMBER IS
  BEGIN
    agg_context := SUM_AGGREGATOR_TYPE(NULL);
    RETURN ODCIConst.Success;
  END;


  MEMBER FUNCTION ODCIAggregateIterate(self IN OUT SUM_AGGREGATOR_TYPE,
    next_number IN NUMBER)
      RETURN NUMBER IS
  BEGIN
    IF self.summation IS NULL THEN
        self.summation := next_number;
    ELSIF summation IS NOT NULL THEN
        self.summation := self.summation + next_number;
    END IF;
    RETURN ODCIConst.Success;
  END;

  MEMBER FUNCTION ODCIAggregateMerge(self IN OUT SUM_AGGREGATOR_TYPE,
    para_context IN SUM_AGGREGATOR_TYPE)
      RETURN NUMBER IS
  BEGIN
    self.summation := self.summation + para_context.summation;
    RETURN ODCIConst.Success;
  END;

  MEMBER FUNCTION ODCIAggregateTerminate(self IN SUM_AGGREGATOR_TYPE,
    return_value OUT NUMBER, flags IN NUMBER)
      RETURN NUMBER IS
  BEGIN
    return_value := self.summation;
    return ODCIConst.Success;
  END;

END;

如果我编写以下函数定义：

CREATE OR REPLACE FUNCTION MY_SUM(input NUMBER)
  RETURN NUMBER PARALLEL_ENABLE AGGREGATE USING SUM_AGGREGATOR_TYPE;

和相应的类型声明进行测试：

CREATE OR REPLACE TYPE VECTOR
IS
  TABLE OF NUMBER;

这个说法：

select my_sum(column_value) from table(vector(1, 2, 1, 45, 22, -1));

给出正确的结果70。但是，使用函数定义创建一个包：

CREATE OR REPLACE PACKAGE MY_FUNCTIONS AS
  FUNCTION MY_SUM(input NUMBER)
    RETURN NUMBER PARALLEL_ENABLE AGGREGATE USING SUM_AGGREGATOR_TYPE;
END;

并通过以下方式调用：

select MY_FUNCTIONS.my_sum(column_value) from table(vector(1, 2, 1, 45, 22, -1));

与爆炸

ORA-00600: internal error code, arguments: [17090], [], [], [], [], [], [], [], [], [], [], []

是否可以在包声明中嵌套自定义聚合函数？