Yurttas/PL/DBL/oracle/F/03/Bank/u01.pc

 1/*  
 2REM
 3REM u01.pc
 4REM
 5REM Delete all tuples from Borrower table.
 6REM
 7*/
 8
 9#include <stdio.h>
10#include <sqlca.h>
11
12#define UNAME_LEN 32
13#define PWD_LEN   16
14
15VARCHAR username[UNAME_LEN]; /* VARCHAR is an Oracle-supplied struct */
16VARCHAR password[PWD_LEN];   /* varchar can be in lower case also. */
17
18char u_name[UNAME_LEN];
19char pwd[PWD_LEN];
20
21void connect_to_oracle();
22void sql_error();
23
24void main(int argc, char* argv[]) {
25  connect_to_oracle();
26
27  EXEC SQL
28    DELETE FROM Borrower;
29
30  EXEC SQL COMMIT WORK RELEASE;
31
32  exit(0);
33}
34
35
36void sql_error(char* msg) {
37  char err_msg[128];
38  int buflen, msglen;
39
40  EXEC SQL WHENEVER SQLERROR CONTINUE;
41
42  printf("%s \n", msg);
43  buflen = sizeof(err_msg);
44  sqlglm(err_msg, &buflen, &msglen);
45  printf("%.*s \n", msglen, err_msg);
46  exit(1);
47}
48
49
50void connect_to_oracle() {
51  /* get your username/passwd from "user_pwd.txt" file */
52
53  FILE *in_file;
54  in_file = fopen("user_pwd.txt", "r");
55  fscanf(in_file, "%s", u_name);
56  fscanf(in_file, "%s", pwd);
57
58  strncpy((char *) username.arr, u_name, UNAME_LEN);
59  username.len = strlen((char *) username.arr);
60
61  strncpy((char *) password.arr, pwd, PWD_LEN);
62  password.len = strlen((char *) password.arr);
63
64  EXEC SQL WHENEVER SQLERROR DO sql_error ("ORACLE error-- ");
65  EXEC SQL CONNECT :username IDENTIFIED BY :password;
66
67  printf("connected to oracle - \n");
68}