Yurttas/PL/DBL/oracle/F/03/SPJ/Parts-q-all.pc
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1/*
2REM
3REM Parts-q-all.pc
4REM
5REM Query Parts table.
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
21struct {
22 char pn[4];
23 char pname[12];
24 char color[8];
25 int weight;
26 char city[16];
27} parts;
28
29void connect_to_oracle();
30void sql_error();
31
32void main(int argc, char* argv[]) {
33 connect_to_oracle();
34
35 EXEC SQL DECLARE c CURSOR FOR
36 SELECT *
37 FROM Parts;
38
39 EXEC SQL OPEN c;
40
41 EXEC SQL WHENEVER NOT FOUND DO BREAK;
42
43 printf("\npn\tpname\tcolor\tweight\tcity\n");
44 for(;;) {
45 EXEC SQL FETCH c INTO :parts;
46 printf("%s\t%s\t%s\t%d\t%s\n", parts.pn,
47 parts.pname,
48 parts.color,
49 parts.weight,
50 parts.city);
51 }
52
53 EXEC SQL CLOSE c;
54
55 EXEC SQL COMMIT WORK RELEASE;
56
57 exit(0);
58}
59
60
61void sql_error(char* msg) {
62 char err_msg[128];
63 int buflen, msglen;
64
65 EXEC SQL WHENEVER SQLERROR CONTINUE;
66
67 printf("%s \n", msg);
68 buflen = sizeof(err_msg);
69 sqlglm(err_msg, &buflen, &msglen);
70 printf("%.*s \n", msglen, err_msg);
71 exit(1);
72}
73
74
75void connect_to_oracle() {
76 /* get your username/passwd from "user_pwd.txt" file */
77
78 FILE *in_file;
79 in_file = fopen("user_pwd.txt", "r");
80 fscanf(in_file, "%s", u_name);
81 fscanf(in_file, "%s", pwd);
82
83 strncpy((char *) username.arr, u_name, UNAME_LEN);
84 username.len = strlen((char *) username.arr);
85
86 strncpy((char *) password.arr, pwd, PWD_LEN);
87 password.len = strlen((char *) password.arr);
88
89 EXEC SQL WHENEVER SQLERROR DO sql_error ("ORACLE error-- ");
90 EXEC SQL CONNECT :username IDENTIFIED BY :password;
91
92 printf("connected to oracle - \n");
93}