Yurttas/PL/DBL/oracle/F/03/Bank/Client-q-all.pc
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1/*
2REM
3REM Client-q-all.pc
4REM
5REM Query Client 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 customername[16];
22 char bankername[16];
23} client;
24
25void connect_to_oracle();
26void sql_error();
27
28void main(int argc, char* argv[]) {
29 connect_to_oracle();
30
31 EXEC SQL DECLARE c CURSOR FOR
32 SELECT *
33 FROM Client;
34
35 EXEC SQL OPEN c;
36
37 EXEC SQL WHENEVER NOT FOUND DO BREAK;
38
39 printf("\ncustomername\tbankername\n");
40 for(;;) {
41 EXEC SQL FETCH c INTO :client;
42 printf("%s\t%s\n", client.customername,
43 client.bankername);
44 }
45
46 EXEC SQL CLOSE c;
47
48 EXEC SQL COMMIT WORK RELEASE;
49
50 exit(0);
51}
52
53
54void sql_error(char* msg) {
55 char err_msg[128];
56 int buflen, msglen;
57
58 EXEC SQL WHENEVER SQLERROR CONTINUE;
59
60 printf("%s \n", msg);
61 buflen = sizeof(err_msg);
62 sqlglm(err_msg, &buflen, &msglen);
63 printf("%.*s \n", msglen, err_msg);
64 exit(1);
65}
66
67
68void connect_to_oracle() {
69 /* get your username/passwd from "user_pwd.txt" file */
70
71 FILE *in_file;
72 in_file = fopen("user_pwd.txt", "r");
73 fscanf(in_file, "%s", u_name);
74 fscanf(in_file, "%s", pwd);
75
76 strncpy((char *) username.arr, u_name, UNAME_LEN);
77 username.len = strlen((char *) username.arr);
78
79 strncpy((char *) password.arr, pwd, PWD_LEN);
80 password.len = strlen((char *) password.arr);
81
82 EXEC SQL WHENEVER SQLERROR DO sql_error ("ORACLE error-- ");
83 EXEC SQL CONNECT :username IDENTIFIED BY :password;
84
85 printf("connected to oracle - \n");
86}