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resultset_binary.cpp

/*
   Copyright 2007 - 2008 MySQL AB, 2008 - 2009 Sun Microsystems, Inc.  All rights reserved.

   The MySQL Connector/C++ is licensed under the terms of the GPL
   <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most
   MySQL Connectors. There are special exceptions to the terms and
   conditions of the GPL as it is applied to this software, see the
   FLOSS License Exception
   <http://www.mysql.com/about/legal/licensing/foss-exception.html>.
*/

/* *
* Handling binary data using getString()
*
*/

/* Standard C++ includes */
#include <stdlib.h>
#include <iostream>
#include <sstream>
#include <stdexcept>

/* Public interface of the MySQL Connector/C++ */
#include <driver/mysql_public_iface.h>
/* Connection parameter and sample data */
#include "examples.h"

using namespace std;

int main(int argc, const char **argv)
{
      static const string url(argc >= 2 ? argv[1] : EXAMPLE_HOST);
      static const string user(argc >= 3 ? argv[2] : EXAMPLE_USER);
      static const string pass(argc >= 4 ? argv[3] : EXAMPLE_PASS);
      static const string database(argc >= 5 ? argv[4] : EXAMPLE_DB);

      /* Driver Manager */
      sql::Driver *driver;

      /* sql::ResultSet.rowsCount() returns size_t */
      stringstream sql;
      int i;
      struct _test_data min, max;

      cout << boolalpha;
      cout << "1..1" << endl;
      cout << "# Connector/C++ result set.." << endl;

      try {
            /* Using the Driver to create a connection */
            driver = get_driver_instance();
            std::auto_ptr< sql::Connection > con(driver->connect(url, user, pass));

            con->setSchema(database);

            /* Creating a "simple" statement - "simple" = not a prepared statement */
            std::auto_ptr< sql::Statement > stmt(con->createStatement());
            stmt->execute("DROP TABLE IF EXISTS test");
            stmt->execute("CREATE TABLE test(id INT, label CHAR(1), col_binary BINARY(4), col_varbinary VARBINARY(10))");
            cout << "#\t Test table created" << endl;

            /* Populate the test table with data */
            min = max = test_data[0];
            for (i = 0; i < EXAMPLE_NUM_TEST_ROWS; i++) {
                  /* Remember mnin/max values for further testing */
                  if (test_data[i].id < min.id) {
                        min = test_data[i];
                  }
                  if (test_data[i].id > max.id) {
                        max = test_data[i];
                  }

                  /*
                  KLUDGE: You should take measures against SQL injections!
                  */
                  sql.str("");
                  sql << "INSERT INTO test(id, label, col_binary, col_varbinary) VALUES (";
                  sql << test_data[i].id << ", '" << test_data[i].label << "', ";
                  sql << "\"a\\0b\", '" << i * 5 << "\\0abc')";
                  stmt->execute(sql.str());
            }
            cout << "#\t Test table populated" << endl;

            cout << "#\t Testing sql::Statement based resultset" << endl;
            {
                  std::auto_ptr< sql::ResultSet > res(stmt->executeQuery("SELECT * FROM test ORDER BY id ASC"));
                  int row = 0;
                  while (res->next()) {
                        cout << "#\t\t Row " << row << ", getRow() " << res->getRow();
                        cout << " id = " << res->getInt("id");
                        cout << ", label = '" << res->getString("label") << "'";
                        /* cout might "hide" \0 and other special characters from the output */
                        cout << ", col_binary = '" << res->getString("col_binary") << "'";
                        cout << ", col_varbinary = '" << res->getString("col_varbinary") << "'" << endl;

                        /* fixed length column - length = size of the column! */
                        if (res->getString("col_binary").length() != 4)
                              throw runtime_error("BINARY(n) should return std::string of length n regardless how long the value stored in the column is.");

                        if (res->getString("col_binary").compare(0, 1, "a"))
                              throw runtime_error("First sign from BINARY(n) seems wrong");

                        if (res->getString("col_binary").compare(2, 1, "b"))
                              throw runtime_error("Third sign from BINARY(n) seems wrong");

                        if (res->getString("col_varbinary").length() != 5 &&
                              res->getString("col_varbinary").length() != 6)
                              throw runtime_error("VARBINARY(n) should return std::string of length n which holds the length of the actual column value.");

                        sql::ResultSetMetaData * meta = res->getMetaData();
                        cout << "#\t\t COLUMN_SIZE = " << meta->getColumnDisplaySize(3) << endl;
                        row++;
                  }
            }

            /* Clean up */
            /* stmt->execute("DROP TABLE IF EXISTS test");*/
            cout << "# done!" << endl;

      } catch (sql::SQLException &e) {
            /*
            The MySQL Connector/C++ throws three different exceptions:

            - sql::MethodNotImplementedException (derived from sql::SQLException)
            - sql::InvalidArgumentException (derived from sql::SQLException)
            - sql::SQLException (derived from std::runtime_error)
            */
            cout << "# ERR: SQLException in " << __FILE__;
            cout << "(" << __FUNCTION__ << ") on line " << __LINE__ << endl;
            // Use what(), getErrorCode() and getSQLState()
            cout << "# ERR: " << e.what();
            cout << " (MySQL error code: " << e.getErrorCode();
            cout << ", SQLState: " << e.getSQLState() << " )" << endl;
            cout << "not ok 1 - examples/resultset_binary.cpp" << endl;

            return EXIT_FAILURE;
      } catch (std::runtime_error &e) {

            cout << "# ERR: runtime_error in " << __FILE__;
            cout << "(" << __FUNCTION__ << ") on line " << __LINE__ << endl;
            cout << "# ERR: " << e.what() << endl;
            cout << "not ok 1 - examples/resultset_binary.cpp" << endl;

            return EXIT_FAILURE;
      }

      cout << "ok 1 - examples/resultset_binary.cpp" << endl;
      return EXIT_SUCCESS;
}

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