Yurttas/PL/DBL/oracle/F/03/Company-B/q16.pc
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1/*
2REM
3REM q16.pc
4REM
5REM Give all managers a 10 percent raise unless the
6REM salary becomes greater than $100,000. In such cases,
7REM give only a 3 percent raise.
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 employeename[16];
25 char companyname[24];
26 int salary;
27} works;
28
29void connect_to_oracle();
30void sql_error();
31
32void main(int argc, char* argv[]) {
33 connect_to_oracle();
34
35 EXEC SQL
36 UPDATE Works
37 SET salary = salary * 1.03
38 WHERE employeename IN (SELECT managername
39 FROM Manages)
40 AND salary * 1.1 > 100000;
41
42 EXEC SQL
43 UPDATE Works
44 SET salary = salary * 1.1
45 WHERE employeename IN (SELECT managername
46 FROM Manages)
47 AND salary * 1.1 <= 100000;
48
49 EXEC SQL DECLARE c CURSOR FOR
50 SELECT *
51 FROM Works;
52
53 EXEC SQL OPEN c;
54
55 EXEC SQL WHENEVER NOT FOUND DO BREAK;
56
57 printf("\nemployeename\tcompanyname\tsalary\n");
58 for(;;) {
59 EXEC SQL FETCH c INTO :works;
60 printf("%s\t%s\t%d\n", works.employeename,
61 works.companyname,
62 works.salary);
63 }
64
65 EXEC SQL CLOSE c;
66
67 EXEC SQL COMMIT WORK RELEASE;
68
69 exit(0);
70}
71
72
73void sql_error(char* msg) {
74 char err_msg[128];
75 int buflen, msglen;
76
77 EXEC SQL WHENEVER SQLERROR CONTINUE;
78
79 printf("%s \n", msg);
80 buflen = sizeof(err_msg);
81 sqlglm(err_msg, &buflen, &msglen);
82 printf("%.*s \n", msglen, err_msg);
83 exit(1);
84}
85
86
87void connect_to_oracle() {
88 /* get your username/passwd from "user_pwd.txt" file */
89
90 FILE *in_file;
91 in_file = fopen("user_pwd.txt", "r");
92 fscanf(in_file, "%s", u_name);
93 fscanf(in_file, "%s", pwd);
94
95 strncpy((char *) username.arr, u_name, UNAME_LEN);
96 username.len = strlen((char *) username.arr);
97
98 strncpy((char *) password.arr, pwd, PWD_LEN);
99 password.len = strlen((char *) password.arr);
100
101 EXEC SQL WHENEVER SQLERROR DO sql_error ("ORACLE error-- ");
102 EXEC SQL CONNECT :username IDENTIFIED BY :password;
103
104 printf("connected to oracle - \n");
105}