Yurttas/PL/DBL/oracle/F/03/Bank/q02.pc
Revision as of 23:35, 4 November 2013 by MassBot1 (talk | contribs) (Created page with "<syntaxhighlight lang="text" line start="1" enclose="div">→REM REM q02.pc REM REM Find all tuples in which the amount borrowed is more than $1200. REM: #include <stdio....")
1/*
2REM
3REM q02.pc
4REM
5REM Find all tuples in which the amount borrowed is more than $1200.
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 branchname[16];
23 int loannumber;
24 char customername[16];
25 int amount;
26} borrower;
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 *
36 FROM Borrower
37 WHERE amount>1200;
38
39 EXEC SQL OPEN c;
40
41 EXEC SQL WHENEVER NOT FOUND DO BREAK;
42
43 printf("\nbranchname\tloannumber\tcustomername\tamount\n");
44 for(;;) {
45 EXEC SQL FETCH c INTO :borrower;
46 printf("%s\t%d\t\t%s\t%d\n", borrower.branchname,
47 borrower.loannumber,
48 borrower.customername,
49 borrower.amount);
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}