Yurttas/PL/DBL/oracle/F/03/Movie/q07.pc
Revision as of 23:59, 4 November 2013 by MassBot1 (talk | contribs) (Created page with "<syntaxhighlight lang="text" line start="1" enclose="div"> →REM REM q07.pc REM REM Delete all movies existing in the given REM Movie database prior to year 1985. REM: #...")
1/*
2REM
3REM q07.pc
4REM
5REM Delete all movies existing in the given
6REM Movie database prior to year 1985.
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
22struct {
23 char title[24];
24 int year;
25 int length;
26 char filmtype[5];
27 char studioname[32];
28 int producercn;
29} movie;
30
31void connect_to_oracle();
32void sql_error();
33
34void main(int argc, char* argv[]) {
35 connect_to_oracle();
36
37 EXEC SQL
38 DELETE FROM Movie
39 WHERE year < 1985;
40
41 EXEC SQL DECLARE c CURSOR FOR
42 SELECT *
43 FROM Movie;
44
45 EXEC SQL OPEN c;
46
47 EXEC SQL WHENEVER NOT FOUND DO BREAK;
48
49 printf("\ntitle\tyear\tlength\tfilmtype\tstudioname\tproducercn\n");
50 for(;;) {
51 EXEC SQL FETCH c INTO :movie;
52 printf("%s\t%d\t%d\t%s\t%s\t%d\n", movie.title,
53 movie.year,
54 movie.length,
55 movie.filmtype,
56 movie.studioname,
57 movie.producercn);
58 }
59
60 EXEC SQL CLOSE c;
61
62 EXEC SQL COMMIT WORK RELEASE;
63
64 exit(0);
65}
66
67
68void sql_error(char* msg) {
69 char err_msg[128];
70 int buflen, msglen;
71
72 EXEC SQL WHENEVER SQLERROR CONTINUE;
73
74 printf("%s \n", msg);
75 buflen = sizeof(err_msg);
76 sqlglm(err_msg, &buflen, &msglen);
77 printf("%.*s \n", msglen, err_msg);
78 exit(1);
79}
80
81
82void connect_to_oracle() {
83 /* get your username/passwd from "user_pwd.txt" file */
84
85 FILE *in_file;
86 in_file = fopen("user_pwd.txt", "r");
87 fscanf(in_file, "%s", u_name);
88 fscanf(in_file, "%s", pwd);
89
90 strncpy((char *) username.arr, u_name, UNAME_LEN);
91 username.len = strlen((char *) username.arr);
92
93 strncpy((char *) password.arr, pwd, PWD_LEN);
94 password.len = strlen((char *) password.arr);
95
96 EXEC SQL WHENEVER SQLERROR DO sql_error ("ORACLE error-- ");
97 EXEC SQL CONNECT :username IDENTIFIED BY :password;
98
99 printf("connected to oracle - \n");
100}