Yurttas/PL/DBL/oracle/F/03/Company-A/Employee-q-all.pc
Revision as of 23:41, 4 November 2013 by MassBot1 (talk | contribs) (Created page with "<syntaxhighlight lang="text" line start="1" enclose="div"> ββREM REM Employee-q-all.pc REM REM Query Employee table. REM: #include <stdio.h> #include <sqlca.h> #define ...")
1/*
2REM
3REM Employee-q-all.pc
4REM
5REM Query Employee 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 fname[12];
23 char minit;
24 char lname[16];
25 char ssn[10];
26 char bdate[10];
27 char address[24];
28 char sex;
29 float salary;
30 char superssn[10];
31 int dno;
32} employee;
33
34void connect_to_oracle();
35void sql_error();
36
37void main(int argc, char* argv[]) {
38 connect_to_oracle();
39
40 EXEC SQL DECLARE c CURSOR FOR
41 SELECT *
42 FROM Employee;
43
44 EXEC SQL OPEN c;
45
46 EXEC SQL WHENEVER NOT FOUND DO BREAK;
47
48 printf("\nfname\tminit\tlname\tssn\taddress\tsex\tsalary\tsuperssn\tdno\n");
49 for(;;) {
50 EXEC SQL FETCH c INTO :employee;
51 printf("%s\t%c\t%s\t%s\t%s\t%s\t%c\%f\t%s\t%d\n",employee.fname,
52 &employee.minit,
53 employee.lname,
54 employee.ssn,
55 employee.bdate,
56 employee.address,
57 &employee.sex,
58 &employee.salary,
59 employee.superssn,
60 &employee.dno);
61 }
62
63 EXEC SQL CLOSE c;
64
65 EXEC SQL COMMIT WORK RELEASE;
66
67 exit(0);
68}
69
70
71void sql_error(char* msg) {
72 char err_msg[128];
73 int buflen, msglen;
74
75 EXEC SQL WHENEVER SQLERROR CONTINUE;
76
77 printf("%s \n", msg);
78 buflen = sizeof(err_msg);
79 sqlglm(err_msg, &buflen, &msglen);
80 printf("%.*s \n", msglen, err_msg);
81 exit(1);
82}
83
84
85void connect_to_oracle() {
86 /* get your username/passwd from "user_pwd.txt" file */
87
88 FILE *in_file;
89 in_file = fopen("user_pwd.txt", "r");
90 fscanf(in_file, "%s", u_name);
91 fscanf(in_file, "%s", pwd);
92
93 strncpy((char *) username.arr, u_name, UNAME_LEN);
94 username.len = strlen((char *) username.arr);
95
96 strncpy((char *) password.arr, pwd, PWD_LEN);
97 password.len = strlen((char *) password.arr);
98
99 EXEC SQL WHENEVER SQLERROR DO sql_error ("ORACLE error-- ");
100 EXEC SQL CONNECT :username IDENTIFIED BY :password;
101
102 printf("connected to oracle - \n");
103}