Yurttas/PL/DBL/oracle/F/03/Bank/Borrower-q-all.pc

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