Oracle PL/SQL Package – How to Execute a PL/SQL Package from SQL> Prompt

It wouldn't perform as well, but to meet your requirements given your limitations, you could use a pipelined result set. Both your original procedure and your new procedure could then use the function. The original one would return the entire results, and the new procedure would wrap the function in a larger query that does the GROUP BY. In this way the core query code would not be duplicated. Here is a pipelined result set example along with two queries using it:

create or replace PACKAGE Example AUTHID Definer AS

Type tRow Is Record (
     F1 Date
   , F2 Date
   );
Type tTable Is Table of tRow;
Function PipelineResult(pDate In Date DEFAULT sysdate) Return tTable Pipelined;

END Example;
/


create or replace PACKAGE BODY Example AS

Function PipelineResult(pDate In Date DEFAULT sysdate) Return tTable Pipelined AS
   vYesterday Date := trunc(sysdate-1);
Begin
  For vRow IN (
      SELECT pDate, vYesterday FROM DUAL
      UNION ALL
      SELECT pDate, vYesterday-1 FROM DUAL
      UNION ALL
      SELECT pDate+1, vYesterday FROM DUAL
  )
  Loop
    Pipe Row(vRow);
  End Loop;
End;

END Example;
/


SELECT * FROM TABLE(Example.PipelineResult);

SELECT F1, count(*) FROM TABLE(Example.PipelineResult) GROUP BY F1;

From section "6 Coding PL/SQL Subprograms and Packages" in the "Oracle Database Advanced Application Developer's Guide, 11g Release 2 (11.2), E41502-05"

To create without errors (to compile the subprogram or package successfully) requires these additional privileges:
- The owner of the subprogram or package must be explicitly granted the necessary object privileges for all objects referenced within the body of the code.
- The owner cannot obtain required privileges through roles.

You must have granted select permission on this table to the schema that owns the package. It is important that this permissions are granted directly to the package owner and not indirect using a role. Using a role is sufficient to select the table directly by Toad but it is not sufficient if you want to select the table in a package.