Yurttas/PL/DBL/oracle/F/03/Bank/q101.pc

 1/*  
 2REM
 3REM q101.pc
 4REM
 5REM Find all customers with both loan and an account
 6REM at the 'Perryridge' branch.
 7REM
 8*/
 9
10#include <stdio.h>
11#include <sqlca.h>
12
13#define UNAME_LEN 32
14#define PWD_LEN   16
15
16VARCHAR username[UNAME_LEN]; /* VARCHAR is an Oracle-supplied struct */
17VARCHAR password[PWD_LEN];   /* varchar can be in lower case also. */
18
19char u_name[UNAME_LEN];
20char pwd[PWD_LEN];
21
22struct {
23  char customername[16];
24} customer;
25
26void connect_to_oracle();
27void sql_error();
28
29void main(int argc, char* argv[]) {
30  connect_to_oracle();
31
32  EXEC SQL DECLARE c CURSOR FOR
33    (SELECT customername
34     FROM Depositor
35     WHERE branchname = 'Perryridge'
36    INTERSECT
37    (SELECT customername
38     FROM Borrower
39     WHERE branchname = 'Perryridge');
40
41  EXEC SQL OPEN c;
42
43  EXEC SQL WHENEVER NOT FOUND DO BREAK;
44
45  printf("\ncustomername\n");
46  for(;;) {
47    EXEC SQL FETCH c INTO :customer;
48    printf("%s\n", customer.customername);
49  }
50
51  EXEC SQL CLOSE c;
52
53  EXEC SQL COMMIT WORK RELEASE;
54
55  exit(0);
56}
57
58
59void sql_error(char* msg) {
60  char err_msg[128];
61  int buflen, msglen;
62
63  EXEC SQL WHENEVER SQLERROR CONTINUE;
64
65  printf("%s \n", msg);
66  buflen = sizeof(err_msg);
67  sqlglm(err_msg, &buflen, &msglen);
68  printf("%.*s \n", msglen, err_msg);
69  exit(1);
70}
71
72
73void connect_to_oracle() {
74  /* get your username/passwd from "user_pwd.txt" file */
75
76  FILE *in_file;
77  in_file = fopen("user_pwd.txt", "r");
78  fscanf(in_file, "%s", u_name);
79  fscanf(in_file, "%s", pwd);
80
81  strncpy((char *) username.arr, u_name, UNAME_LEN);
82  username.len = strlen((char *) username.arr);
83
84  strncpy((char *) password.arr, pwd, PWD_LEN);
85  password.len = strlen((char *) password.arr);
86
87  EXEC SQL WHENEVER SQLERROR DO sql_error ("ORACLE error-- ");
88  EXEC SQL CONNECT :username IDENTIFIED BY :password;
89
90  printf("connected to oracle - \n");
91}