Dynamic SQL using DBMS_SQL Package

Question

Hi,
How do i construct a
"select * from :table_name(input parameter)"
in a store proc in Oracle8 ?
I know this is only possible using DBMS_SQL package in Oracle 8.
I know that this is easily done using native Dyanamic SQL 8i onwards.
Also I want to return the resultset obtained above through a REF cursor.
Please Help !!!
Will be greatly indebted to anyone who can supply the code or direct me to some helpful information on the net.
Thanks in advance.
Peeyush

Answer 1

You are asking for two things here, use the tablename dynamically
as bind variable to fetch the resultset and send the resultset to
a stored procedure.
I thought of doing both of them with REF Cursors, no Dynamic SQL here.
Consider the following test,SQL> create or replace package ref_types as
  2       type r_cursor(pSal NUMBER) is ref cursor;
  3  end;
  4  /
Package created.
-- Please note that I did some quick and dirty coding to switch
-- between the table names to show the results.
SQL> create or replace procedure p_dynamic_table
  2  (pRefCur IN ref_types.r_cursor, pTable varchar2) as
  3     emp_rec my_emp%ROWTYPE;
  4     inv_rec test444%ROWTYPE;
  5  begin
  6    loop
  7       IF UPPER(pTable) = 'MY_EMP' Then
  8          fetch pRefcur into emp_rec;
  9       Elsif UPPER(pTable) = 'INV' THEN
10          fetch pRefCur into inv_rec;
11       Else
12          exit;
13       End if;
14       exit when pRefcur%NOTFOUND;
15       If UPPER(pTable) = 'MY_EMP' Then
16          dbms_output.put_line(emp_rec.empno);
17       Elsif UPPER(pTable) = 'INV' Then
18          dbms_output.put_line(inv_rec.seq);
19       Else
20         Null;
21       End if;
22    end loop;
23  end;
24  /
Procedure created.
SQL> declare
  2     vRefCur         ref_types.r_cursor;
  3     vTableName      Varchar2(30);
  4  begin
  5    vTableName := 'my_emp';
  6    open vRefCur for 'select * from ' || vTableName;
  7    p_dynamic_table(vRefCur, vTableName);
  8    close vRefCur;
  9    vTableName := 'inv';
10    open vRefCur for 'select * from ' || vTableName;
11    p_dynamic_table(vRefCur, vTableName);
12    close vRefCur;
13  end;
14  /
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PL/SQL procedure successfully completed.Thx,
Sri