Yurttas/PL/DBL/oracle/F/03/Movie/q02.pc
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1/*
2REM
3REM q02.pc
4REM
5REM Find all movies of 1998 ordered by title
6REM and studios in ascending order grouped
7REM by BW and color.
8REM
9*/
10
11#include <stdio.h>
12#include <sqlca.h>
13
14#define UNAME_LEN 32
15#define PWD_LEN 16
16
17VARCHAR username[UNAME_LEN]; /* VARCHAR is an Oracle-supplied struct */
18VARCHAR password[PWD_LEN]; /* varchar can be in lower case also. */
19
20char u_name[UNAME_LEN];
21char pwd[PWD_LEN];
22
23struct {
24 char title[24];
25 char studioname[32];
26} movie;
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 title, studioname
36 FROM Movie
37 WHERE year = 1998
38 GROUP BY filmtype, title, studioname
39 ORDER BY title ASC, studioname ASC;
40
41 EXEC SQL OPEN c;
42
43 EXEC SQL WHENEVER NOT FOUND DO BREAK;
44
45 printf("\ntitle\tstudioname\n");
46 for(;;) {
47 EXEC SQL FETCH c INTO :movie;
48 printf("%s\t%s\n", movie.title,
49 movie.studioname);
50 }
51
52 EXEC SQL CLOSE c;
53
54 EXEC SQL COMMIT WORK RELEASE;
55
56 exit(0);
57}
58
59
60void sql_error(char* msg) {
61 char err_msg[128];
62 int buflen, msglen;
63
64 EXEC SQL WHENEVER SQLERROR CONTINUE;
65
66 printf("%s \n", msg);
67 buflen = sizeof(err_msg);
68 sqlglm(err_msg, &buflen, &msglen);
69 printf("%.*s \n", msglen, err_msg);
70 exit(1);
71}
72
73
74void connect_to_oracle() {
75 /* get your username/passwd from "user_pwd.txt" file */
76
77 FILE *in_file;
78 in_file = fopen("user_pwd.txt", "r");
79 fscanf(in_file, "%s", u_name);
80 fscanf(in_file, "%s", pwd);
81
82 strncpy((char *) username.arr, u_name, UNAME_LEN);
83 username.len = strlen((char *) username.arr);
84
85 strncpy((char *) password.arr, pwd, PWD_LEN);
86 password.len = strlen((char *) password.arr);
87
88 EXEC SQL WHENEVER SQLERROR DO sql_error ("ORACLE error-- ");
89 EXEC SQL CONNECT :username IDENTIFIED BY :password;
90
91 printf("connected to oracle - \n");
92}