將Oracle游標行強制轉換為用戶定義的記錄類型，以實現流水線函數

Question

在我的程序包中，我定義了一個record類型和一個對應的table類型。 然后，我有了一個流水線函數，該函數打開游標並嘗試通過管道傳遞每個結果。 問題是它給我類型不匹配錯誤。 我試圖將游標強制轉換為我的記錄類型，但無濟於事：我在做什么錯？

create or replace package myTest as
  type myRec is record(
    id  integer,
    foo varchar2(10)
  );
  type myTable is table of myRec;

  function output() return myTable pipelined;
end myTest;
/

create or replace package body myTest as
  function output() return myTable pipelined
  as
  begin
    for myCur in (
      select id, foo from someTable
    )
    loop
      pipe row(cast(myCur as myRec));
    end loop;

    return;
  end output;
end myTest;
/

Answer 1

create or replace package body myTest as
  function output return myTable pipelined
  as
    --   Add a "record" variable":
    xyz  myRec;
  begin
    for myCur in (
      select id, foo from someTable
    )
    loop
      -- Fill the record variable with the
      -- values from the cursor ...
      xyz.id  := myCur.id;
      xyz.foo := myCur.foo;
      -- ... and pipe it:
      pipe row(xyz);
    end loop;

    return;
  end output;
end myTest;