Yurttas/PL/DBL/oracle/F/03/Bank/v01.pc
Revision as of 23:37, 4 November 2013 by MassBot1 (talk | contribs) (Created page with "<syntaxhighlight lang="text" line start="1" enclose="div">ββREM REM v01.pc REM REM Consider a view consisting of branch names and the names of REM customers. REM: #inclu...")
1/*
2REM
3REM v01.pc
4REM
5REM Consider a view consisting of branch names and the names of
6REM customers.
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 branchname[16];
24 char customername[16];
25} allcustomer;
26
27void connect_to_oracle();
28void sql_error();
29
30void main(int argc, char* argv[]) {
31 connect_to_oracle();
32
33 EXEC SQL
34 CREATE VIEW AllCustomer
35 AS (SELECT branchname, customername
36 FROM Depositor)
37 UNION
38 (SELECT branchname, customername
39 FROM Borrower);
40
41 EXEC SQL DECLARE c CURSOR FOR
42 SELECT *
43 FROM AllCustomer;
44
45 EXEC SQL OPEN c;
46
47 EXEC SQL WHENEVER NOT FOUND DO BREAK;
48
49 printf("\nbranchname\tcustomername\n");
50 for(;;) {
51 EXEC SQL FETCH c INTO :allcustomer;
52 printf("%s\t%s\n", allcustomer.branchname,
53 allcustomer.customername);
54 }
55
56 EXEC SQL CLOSE c;
57
58 EXEC SQL COMMIT WORK RELEASE;
59
60 exit(0);
61}
62
63
64void sql_error(char* msg) {
65 char err_msg[128];
66 int buflen, msglen;
67
68 EXEC SQL WHENEVER SQLERROR CONTINUE;
69
70 printf("%s \n", msg);
71 buflen = sizeof(err_msg);
72 sqlglm(err_msg, &buflen, &msglen);
73 printf("%.*s \n", msglen, err_msg);
74 exit(1);
75}
76
77
78void connect_to_oracle() {
79 /* get your username/passwd from "user_pwd.txt" file */
80
81 FILE *in_file;
82 in_file = fopen("user_pwd.txt", "r");
83 fscanf(in_file, "%s", u_name);
84 fscanf(in_file, "%s", pwd);
85
86 strncpy((char *) username.arr, u_name, UNAME_LEN);
87 username.len = strlen((char *) username.arr);
88
89 strncpy((char *) password.arr, pwd, PWD_LEN);
90 password.len = strlen((char *) password.arr);
91
92 EXEC SQL WHENEVER SQLERROR DO sql_error ("ORACLE error-- ");
93 EXEC SQL CONNECT :username IDENTIFIED BY :password;
94
95 printf("connected to oracle - \n");
96}