occiobj.cpp

此源代码是通过occi连接oracle 9i的简单例子

/** 
 * occiobj.cpp - To exhibit the insertion, selection, updating and deletion 
 *                of a row containing object as one of the column.
 *
 * Description  
 *   Create a program which has insert, select, update & delete as operations
 *   of a object.  Perform all these operations using  interface.
 */


#include <iostream>
#include "occiobjm.h"

using namespace oracle::occi;
using namespace std;

class occiobj
{
  private:

  Environment *env;
  Connection *con;
  Statement *stmt;
  public:

  occiobj (string user, string passwd, string db)
  {
    env = Environment::createEnvironment (Environment::OBJECT);
    occiobjm (env);
    con = env->createConnection (user, passwd, db);
  }

  ~occiobj ()
  {
    env->terminateConnection (con);
    Environment::terminateEnvironment (env);
  }

  /**
   * Insertion of a row 
   */
  void insertRow (int c1, int a1, string a2)
  {
    cout << "Inserting record - Publisher id :" << c1 << 
      ", Publisher address :" << a1 << ", " << a2 <<endl; 
    string sqlStmt = "INSERT INTO publisher_tab VALUES (:x, :y)";
    try{
    stmt = con->createStatement (sqlStmt);
    stmt->setInt (1, c1);
    address *o = new address ();
    o->setStreet_no (Number (a1));
    o->setCity (a2);
    stmt->setObject (2, o);
    stmt->executeUpdate ();
    cout << "Insert - Success" << endl;
    delete (o);
    }catch(SQLException ex)
    {
     cout<<"Exception thrown for insertRow"<<endl;
     cout<<"Error number: "<<  ex.getErrorCode() << endl;
     cout<<ex.getMessage() << endl;
    }

    con->terminateStatement (stmt);
  }


  /**
   * updating a row
   */
  void updateRow (int c1, int a1, string a2)
  {
    cout << "Upadating record with publisher id :"<< c1 << endl;
    string sqlStmt = 
      "UPDATE publisher_tab SET publisher_add= :x WHERE publisher_id = :y";
    try{
    stmt = con->createStatement (sqlStmt);
    address *o = new address ();
    o->setStreet_no (Number (a1));
    o->setCity (a2);
    stmt->setObject (1, o);
    stmt->setInt (2, c1);
    stmt->executeUpdate ();
    cout << "Update - Success" << endl;
    delete (o);
    }catch(SQLException ex)
    {
     cout<<"Exception thrown for updateRow"<<endl;
     cout<<"Error number: "<<  ex.getErrorCode() << endl;
     cout<<ex.getMessage() << endl;
    }
    con->terminateStatement (stmt);
  }


  /**
   * deletion of a row
   */
  void deleteRow (int c1, int a1, string a2)
  {
    cout << "Deletion of record where publisher id :" << c1 <<endl; 
    string sqlStmt = 
    "DELETE FROM publisher_tab WHERE publisher_id= :x AND publisher_add = :y";
    try{
    stmt = con->createStatement (sqlStmt);
    stmt->setInt (1, c1);

    address *o = new address ();
    o->setStreet_no (Number (a1));
    o->setCity (a2);
    stmt->setObject (2, o);
    stmt->executeUpdate ();
    cout << "Delete - Success" << endl;
    delete (o);
    }catch(SQLException ex)
    {
     cout<<"Exception thrown for deleteRow"<<endl;
     cout<<"Error number: "<<  ex.getErrorCode() << endl;
     cout<<ex.getMessage() << endl;
    }

    con->terminateStatement (stmt);
  }

  /**
   * displaying all the rows in the table
   */
  void displayAllRows ()
  {
    string sqlStmt = "SELECT publisher_id, publisher_add FROM publisher_tab";
    try{
    stmt = con->createStatement (sqlStmt);
    ResultSet *rset = stmt->executeQuery ();
   
    while (rset->next ())
    {
      cout << "publisher id: " << rset->getInt (1) 
           << " publisher address: address (" ;
      address *o =  (address *)rset->getObject (2);
      cout << (int)o->getStreet_no () << ", " << o->getCity () << ")" << endl;
    }

    stmt->closeResultSet (rset);
    }catch(SQLException ex)
    {
     cout<<"Exception thrown for displayAllRows"<<endl;
     cout<<"Error number: "<<  ex.getErrorCode() << endl;
     cout<<ex.getMessage() << endl;
    }

    con->terminateStatement (stmt);
  }

};//end of class occiobj;


int main (void)
{
  string user = "SCOTT";
  string passwd = "TIGER";
  string db = "";

  try
  {
    cout << "occiobj - Exhibiting simple insert, delete & update operations" 
     " on Oracle objects" << endl;
    occiobj *demo = new occiobj (user, passwd, db);

    cout << "displaying all rows before operations" << endl;
    demo->displayAllRows ();
  
    demo->insertRow (12, 122, "MIKE");
  
    demo->deleteRow (11, 121, "ANNA");
  
    demo->updateRow (23, 123, "KNUTH");
  
    cout << "displaying all rows after all operations" << endl;
    demo->displayAllRows ();
  
    delete (demo);
    cout << "occiobj - done" << endl;
  }catch (SQLException ea)
  {
    cerr << "Error running the demo: " << ea.getMessage () << endl;
  }
}