Yurttas/PL/DBL/oracle/F/03/PC/Laptop-q-all.pc

 1/*  
 2REM
 3REM Laptop-q-all.laptop
 4REM
 5REM Query Laptop 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
21struct {
22  char model[6];
23  int speed;
24  int ram;
25  float hd;
26  float screen;
27  int price;
28} laptop;
29
30void connect_to_oracle();
31void sql_error();
32
33void main(int argc, char* argv[]) {
34  connect_to_oracle();
35
36  EXEC SQL DECLARE c CURSOR FOR
37    SELECT *
38    FROM Laptop;
39
40  EXEC SQL OPEN c;
41
42  EXEC SQL WHENEVER NOT FOUND DO BREAK;
43
44  printf("\nmodel\tspeed\tram\thd\tscreen\tprice\n");
45  for(;;) {
46    EXEC SQL FETCH c INTO :laptop;
47    printf("%s\t%d\t%d\t%f\t%f\t%d\n", laptop.model,
48                                       laptop.speed,
49                                       laptop.ram,
50                                       laptop.hd,
51                                       laptop.screen,
52                                       laptop.price);
53  }
54
55  EXEC SQL CLOSE c;
56
57  EXEC SQL COMMIT WORK RELEASE;
58
59  exit(0);
60}
61
62
63void sql_error(char* msg) {
64  char err_msg[128];
65  int buflen, msglen;
66
67  EXEC SQL WHENEVER SQLERROR CONTINUE;
68
69  printf("%s \n", msg);
70  buflen = sizeof(err_msg);
71  sqlglm(err_msg, &buflen, &msglen);
72  printf("%.*s \n", msglen, err_msg);
73  exit(1);
74}
75
76
77void connect_to_oracle() {
78  /* get your username/passwd from "user_pwd.txt" file */
79
80  FILE *in_file;
81  in_file = fopen("user_pwd.txt", "r");
82  fscanf(in_file, "%s", u_name);
83  fscanf(in_file, "%s", pwd);
84
85  strncpy((char *) username.arr, u_name, UNAME_LEN);
86  username.len = strlen((char *) username.arr);
87
88  strncpy((char *) password.arr, pwd, PWD_LEN);
89  password.len = strlen((char *) password.arr);
90
91  EXEC SQL WHENEVER SQLERROR DO sql_error ("ORACLE error-- ");
92  EXEC SQL CONNECT :username IDENTIFIED BY :password;
93
94  printf("connected to oracle - \n");
95}