Yurttas/PL/DBL/oracle/F/03/PC/q13.pc
Revision as of 00:03, 5 November 2013 by MassBot1 (talk | contribs) (Created page with "<syntaxhighlight lang="text" line start="1" enclose="div">→REM REM q13.pc REM REM Delete all Laptops made by a manufacturer that doesn't make REM printers. REM: #includ...")
1/*
2REM
3REM q13.pc
4REM
5REM Delete all Laptops made by a manufacturer that doesn't make
6REM printers.
7REM
8*/
9
10#include <stdio.h>
11#include <sqlca.h>
12
13#define UNAME_LEN 32
14#define PWD_LEN 16
15
16VARCHAR username[UNAME_LEN]; /* VARCHAR is an Oracle-supplied struct */
17VARCHAR password[PWD_LEN]; /* varchar can be in lower case also. */
18
19char u_name[UNAME_LEN];
20char pwd[PWD_LEN];
21
22void connect_to_oracle();
23void sql_error();
24
25void main(int argc, char* argv[]) {
26 connect_to_oracle();
27
28 EXEC SQL
29 DELETE FROM Product
30 WHERE type='laptop'
31 AND maker NOT IN (SELECT maker
32 FROM Product
33 WHERE type='printer');
34
35 EXEC SQL
36 DELETE FROM Laptop
37 WHERE model NOT IN (SELECT model
38 FROM Product);
39
40 EXEC SQL WHENEVER NOT FOUND DO BREAK;
41
42 EXEC SQL COMMIT WORK RELEASE;
43
44 exit(0);
45}
46
47
48void sql_error(char* msg) {
49 char err_msg[128];
50 int buflen, msglen;
51
52 EXEC SQL WHENEVER SQLERROR CONTINUE;
53
54 printf("%s \n", msg);
55 buflen = sizeof(err_msg);
56 sqlglm(err_msg, &buflen, &msglen);
57 printf("%.*s \n", msglen, err_msg);
58 exit(1);
59}
60
61
62void connect_to_oracle() {
63 /* get your username/passwd from "user_pwd.txt" file */
64
65 FILE *in_file;
66 in_file = fopen("user_pwd.txt", "r");
67 fscanf(in_file, "%s", u_name);
68 fscanf(in_file, "%s", pwd);
69
70 strncpy((char *) username.arr, u_name, UNAME_LEN);
71 username.len = strlen((char *) username.arr);
72
73 strncpy((char *) password.arr, pwd, PWD_LEN);
74 password.len = strlen((char *) password.arr);
75
76 EXEC SQL WHENEVER SQLERROR DO sql_error ("ORACLE error-- ");
77 EXEC SQL CONNECT :username IDENTIFIED BY :password;
78
79 printf("connected to oracle - \n");
80}