1/*
2REM
3REM q06.pc
4REM
5REM Find all customers of the 'Perryridge' branch, i.e., find
6REM everyone who has an account, a loan, or both.
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 UNION
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}