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

 1/*  
 2REM
 3REM Printer-q-all.pc
 4REM
 5REM Query Printer 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  char color[6];
24  char type[8];
25  int price;
26} printer;
27
28void connect_to_oracle();
29void sql_error();
30
31void main(int argc, char* argv[]) {
32  connect_to_oracle();
33
34  EXEC SQL DECLARE c CURSOR FOR
35    SELECT *
36    FROM Printer;
37
38  EXEC SQL OPEN c;
39
40  EXEC SQL WHENEVER NOT FOUND DO BREAK;
41
42  printf("\nmodel\tcolor\ttype\tprice\n");
43  for(;;) {
44    EXEC SQL FETCH c INTO :pc;
45    printf("%s\t%s\t%s\t%d\n", pc.model,
46                               pc.color,
47                               pc.type,
48                               pc.price);
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}