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