Yurttas/PL/DBL/oracle/F/03/PC/q12.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 q12.pc REM REM Delete all PC's with less than 2 gigabyte of hard disk. REM: #include <stdio.h> #inclu...")
1/*
2REM
3REM q12.pc
4REM
5REM Delete all PC's with less than 2 gigabyte of hard disk.
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
21void connect_to_oracle();
22void sql_error();
23
24void main(int argc, char* argv[]) {
25 connect_to_oracle();
26
27 EXEC SQL
28 DELETE FROM Product
29 WHERE model IN (SELECT model
30 FROM PC
31 WHERE hd<2.0);
32
33 EXEC SQL
34 DELETE FROM PC
35 WHERE hd<2.0;
36
37 EXEC SQL WHENEVER NOT FOUND DO BREAK;
38
39 EXEC SQL COMMIT WORK RELEASE;
40
41 exit(0);
42}
43
44
45void sql_error(char* msg) {
46 char err_msg[128];
47 int buflen, msglen;
48
49 EXEC SQL WHENEVER SQLERROR CONTINUE;
50
51 printf("%s \n", msg);
52 buflen = sizeof(err_msg);
53 sqlglm(err_msg, &buflen, &msglen);
54 printf("%.*s \n", msglen, err_msg);
55 exit(1);
56}
57
58
59void connect_to_oracle() {
60 /* get your username/passwd from "user_pwd.txt" file */
61
62 FILE *in_file;
63 in_file = fopen("user_pwd.txt", "r");
64 fscanf(in_file, "%s", u_name);
65 fscanf(in_file, "%s", pwd);
66
67 strncpy((char *) username.arr, u_name, UNAME_LEN);
68 username.len = strlen((char *) username.arr);
69
70 strncpy((char *) password.arr, pwd, PWD_LEN);
71 password.len = strlen((char *) password.arr);
72
73 EXEC SQL WHENEVER SQLERROR DO sql_error ("ORACLE error-- ");
74 EXEC SQL CONNECT :username IDENTIFIED BY :password;
75
76 printf("connected to oracle - \n");
77}