Yurttas/PL/DBL/oracle/F/03/Company-A/Employee-q-all.pc

  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}