Yurttas/PL/DBL/oracle/F/03/SPJ/Projects-ins.pc

  1/*
  2REM
  3REM
  4REM Projects-ins.pc
  5REM
  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 jn[4];
 23  char jname[16];
 24  char city[16];
 25} projects;
 26
 27void connect_to_oracle();
 28void sql_error();
 29
 30void main(int argc, char* argv[]) {
 31  FILE *in_file;
 32
 33  char in_filename[32];
 34
 35  if(argc<2) {
 36    printf("Enter the input filename : ");
 37    scanf("%s", in_filename);
 38  }
 39  else strcpy(in_filename, argv[1]);
 40
 41  in_file = fopen(in_filename, "r");
 42
 43  if(in_file==NULL)
 44    printf("File named as %s is not opened for input.\n", in_filename);
 45  else {
 46    connect_to_oracle();
 47
 48    EXEC SQL
 49      WHENEVER SQLERROR DO sql_error("Error in INSERT_table: Projects");
 50
 51    while(fscanf(in_file,"%3c %7c %8c\n",projects.jn,
 52                                         projects.jname,
 53                                         projects.city)!=EOF){
 54      EXEC SQL
 55        INSERT INTO Projects
 56          VALUES(:projects.jn,
 57                 :projects.jname,
 58                 :projects.city);
 59    }
 60  }
 61
 62  EXEC SQL COMMIT WORK RELEASE;
 63
 64  exit(0);
 65}
 66
 67
 68void sql_error(char* msg) {
 69  char err_msg[128];
 70  int buflen, msglen;
 71
 72  EXEC SQL WHENEVER SQLERROR CONTINUE;
 73
 74  printf("%s \n", msg);
 75  buflen = sizeof(err_msg);
 76  sqlglm(err_msg, &buflen, &msglen);
 77  printf("%.*s \n", msglen, err_msg);
 78  exit(1);
 79}
 80
 81
 82void connect_to_oracle() {
 83  /* get your username/passwd from "user_pwd.txt" file */
 84
 85  FILE *in_file;
 86  in_file = fopen("user_pwd.txt", "r");
 87  fscanf(in_file, "%s", u_name);
 88  fscanf(in_file, "%s", pwd);
 89
 90  strncpy((char *) username.arr, u_name, UNAME_LEN);
 91  username.len = strlen((char *) username.arr);
 92
 93  strncpy((char *) password.arr, pwd, PWD_LEN);
 94  password.len = strlen((char *) password.arr);
 95
 96  EXEC SQL WHENEVER SQLERROR DO sql_error ("ORACLE error-- ");
 97  EXEC SQL CONNECT :username IDENTIFIED BY :password;
 98
 99  printf("connected to oracle - \n");
100}