Fetching from a cursor and writing to a file in Pro*C

Question

Hi guys,
I have a situation in hand here and I guess my "C" skills are putting me up to the test. My cursor is fetching 3 records and its all fine. I am also being able to sprintf those details and the fprintf also works perfectly -- except when I come back for Record 2, the details get overwritten and finally Record 3 is what remains on the file.
I know that UTL_FILE.PUT_LINE works just fine in Loops but here I seem to be doing somethign wrong. Has anyone seen this problem or situation before ?
void get_student_data(void)
   FILE   *student_file;
   char    student_file_name[100];
  exec sql begin declare section;
  exec sql end declare section;
      if ((student_file = fopen(student_file_name,"w")) == NULL)
          printf("Error opening data file!\n");
   exec sql declare student_cur cursor for
         select  s.student_id
                  to_char(s.start_date,'DD-Mon-YYYY'),
                  s.student_addr1,
                  s.student_addr2,
                  s.city,
                  s.state,
                  s.zip_code
         from   student s
         order by s.student_id;
   exec sql open student_cur;
   for (;;)
      exec sql fetch student_cur
          into  :cur_student_id,
                 :cur_start_date,
                 :cur_addr1,
                 :cur_addr2,
                 :cur_city,
                 :cur_state,
                 :cur_zip_code;
      if (sqlcode > 0)
         break;
   sprintf(out_line, "\"%d\",\"%s\",\"%s\",\"%s\",\"%s\",\"%s\","\n",
                     student_id,
                     (char *)start_date.arr,
                     (char *)addr1.arr,
                     (char *)addr2.arr,
                     (char *)city.arr,
                     (char *)state.arr,
                     (char *)zip_code.arr );
   fprintf(student_file, out_line);
   exec sql close student_cur;
   if (!student_file == NULL))
      fclose(student_file_file);
{code}
Thanks a bunch !
Edited by: RDonASunnyDay on Oct 20, 2009 11:07 AM                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       

Answer 1

Hi riedelme,
The program is working fine. The procedure I am calling happens to be inside a FOR loop which I did not mention and that's my fault. You guys were on the right track.
If you notice, the fclose(filename) was at the very end of the procedure but everytime the procedure is called in the out for loop, the file gets opened and closed. So, that's why the file has always one record !
However, the logic of closing the cursor shoudl still be after closing the inner for loop.
Thanks