Yurttas/PL/DBL/oracle/F/03/Bank/u06.pc

  1/*  
  2REM
  3REM u06.pc
  4REM
  5REM Accounts with balances over $10,000 receive 6 percent interest,
  6REM while all others receive 5 percent.
  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  int  accountnumber;
 25  char customername[16];
 26  int  balance;
 27} depositor;
 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 Depositor
 37    SET balance = balance*1.06
 38    WHERE balance>10000;
 39
 40  EXEC SQL
 41    UPDATE Depositor
 42    SET balance = balance*1.05
 43    WHERE balance<=10000;
 44
 45  EXEC SQL DECLARE c CURSOR FOR
 46    SELECT *
 47    FROM Depositor;
 48
 49  EXEC SQL OPEN c;
 50
 51  EXEC SQL WHENEVER NOT FOUND DO BREAK;
 52
 53  printf("\nbranchname\taccountnumber\tcustomername\tbalance\n");
 54  for(;;) {
 55    EXEC SQL FETCH c INTO :depositor;
 56    printf("%s\t%d\t\t%s\t%d\n", depositor.branchname,
 57                                 depositor.accountnumber,  
 58                                 depositor.customername,
 59                                 depositor.balance);
 60  }
 61
 62  EXEC SQL CLOSE c;
 63
 64  EXEC SQL COMMIT WORK RELEASE;
 65
 66  exit(0);
 67}
 68
 69
 70void sql_error(char* msg) {
 71  char err_msg[128];
 72  int buflen, msglen;
 73
 74  EXEC SQL WHENEVER SQLERROR CONTINUE;
 75
 76  printf("%s \n", msg);
 77  buflen = sizeof(err_msg);
 78  sqlglm(err_msg, &buflen, &msglen);
 79  printf("%.*s \n", msglen, err_msg);
 80  exit(1);
 81}
 82
 83
 84void connect_to_oracle() {
 85  /* get your username/passwd from "user_pwd.txt" file */
 86
 87  FILE *in_file;
 88  in_file = fopen("user_pwd.txt", "r");
 89  fscanf(in_file, "%s", u_name);
 90  fscanf(in_file, "%s", pwd);
 91
 92  strncpy((char *) username.arr, u_name, UNAME_LEN);
 93  username.len = strlen((char *) username.arr);
 94
 95  strncpy((char *) password.arr, pwd, PWD_LEN);
 96  password.len = strlen((char *) password.arr);
 97
 98  EXEC SQL WHENEVER SQLERROR DO sql_error ("ORACLE error-- ");
 99  EXEC SQL CONNECT :username IDENTIFIED BY :password;
100
101  printf("connected to oracle - \n");
102}