How to call a function name stored in a a variable

Question

I am trying to call a function in a stored procedure based on the contents of a variable returned from a select statement. I have tried using:
funcCall := 'SELECT ' || BRName || ' INTO bOut FROM DUAL';
EXECUTE immediate funcCall;
where BRName is the name of the function in the package I want to call and bOut is the boolean reutn from the function. Am I way off base in doing this like this?
I am getting an invalid identifier error. Any help would be appreciated.

Answer 1

  1  declare
  2  sql_string varchar2(2000);
  3  begin
  4  sql_string := 'select ' || func_name || ' into a from dual ';
  5  execute immediate sql_string;
  6* end;
SQL> /
sql_string := 'select ' || func_name || ' into a from dual ';
ERROR at line 4:
ORA-06550: line 4, column 28:
PLS-00201: identifier 'FUNC_NAME' must be declared
ORA-06550: line 4, column 1:
PL/SQL: Statement ignored
  1  declare
  2  sql_string varchar2(2000);
  3  func_name varchar2(30);
  4  begin
  5  func_name := 'some_func';
  6  sql_string := 'select ' || func_name || ' into a from dual ';
  7  execute immediate sql_string;
  8* end;
SQL> /
declare
ERROR at line 1:
ORA-00904: "SOME_FUNC": invalid identifier
ORA-06512: at line 7
SQL> desc some_func;
ERROR:
ORA-04043: object some_func does not exist
  1  create or replace function test_func
  2       return number
  3       is
  4       begin
  5          return 0;
  6*      end;
SQL> /
Function created.
  1  declare
  2  sql_string varchar2(2000);
  3  func_name varchar2(30);
  4  begin
  5  func_name := 'test_func';
  6  sql_string := 'select ' || func_name || ' into a from dual ';
  7  execute immediate sql_string;
  8* end;
SQL> /
declare
ERROR at line 1:
ORA-00905: missing keyword
ORA-06512: at line 7
SQL> Set serveroutput on
  1   declare
  2   sql_string varchar2(2000);
  3   func_name varchar2(30);
  4   return_value number;
  5   begin
  6   func_name := 'test_func';
  7   sql_string := 'select ' || func_name || ' from dual ';
  8   execute immediate sql_string into return_value;
  9   dbms_output.put_line(return_value);
10* end;
SQL> /
0
PL/SQL procedure successfully completed.Hope that helps.
Regards
Raj