Please help Getting ORA-06504.

Question

Hi,
Need help in the procedure.could you please let me know whats the problem.
************ File OPENED successfully *******************
I am in OTHERS exception block:::ORA-06504: PL/SQL: Return types of Result Set variables or query do not match
CREATE OR REPLACE procedure test_emp_proc_db2csv is
l_output UTL_FILE.FILE_TYPE;
l_columnValue varchar2(32767);
l_separator varchar2(10) := '|';
TYPE generic_rc IS REF CURSOR;
curr_v generic_rc;
BEGIN
l_output := utl_file.fopen('UTL_FILE_DIR', 'test.txt','W',32767);
dbms_output.put_line('************ File OPENED successfully *******************');
OPEN curr_v FOR select * from test_emp;
LOOP FETCH curr_v INTO l_columnValue;
EXIT WHEN curr_v%NOTFOUND;
dbms_output.put_line(l_columnValue);
utl_file.put( l_output, l_separator ||
l_columnValue );
l_separator := '|';
END LOOP; -- curr_v
utl_file.fclose( l_output );
dbms_output.put_line('************ File CLOSED successfully *******************');
exception
WHEN utl_file.invalid_path THEN
RAISE_APPLICATION_ERROR(-20001, 'utl_file.invalid_path');
WHEN utl_file.invalid_mode THEN
RAISE_APPLICATION_ERROR(-20001, 'utl_file.invalid_mode');
WHEN utl_file.invalid_filehandle THEN
RAISE_APPLICATION_ERROR(-20001, 'utl_file.invalid_filehandle');
WHEN utl_file.invalid_operation THEN
RAISE_APPLICATION_ERROR(-20001, 'utl_file.invalid_operation');
WHEN utl_file.read_error THEN
RAISE_APPLICATION_ERROR(-20001, 'utl_file.read_error');
WHEN utl_file.write_error THEN
RAISE_APPLICATION_ERROR(-20001, 'utl_file.write_error');
WHEN utl_file.internal_error THEN
RAISE_APPLICATION_ERROR(-20001, 'utl_file.internal_error');
WHEN OTHERS THEN
--RAISE_APPLICATION_ERROR(-20001, 'utl_file.other_error');  
dbms_output.put_line('I am in OTHERS exception block:::' || sqlerrm);
--utl_file.fCLOSE(file_id);
utl_file.fclose_all;
end test_emp_proc_db2csv;
/

Answer 1

You are selecting all columns from a table:
select * from test_empand trying to put that result into one column:
LOOP FETCH curr_v INTO l_columnValueDoes the table test_emp only have one column?
If you are only wanting to return one column then you need to change your select to specify that column. If you are wanting to return an entire row, then fetch into a variable declared such as:
l_row test_temp%rowtype
That is my guess.