93 lines
2.9 KiB
C++
93 lines
2.9 KiB
C++
/***********************************************************************
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simple3.cpp - Example showing how to use the 'use' method of retrieving
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a table, as opposed to the more common 'store' method illustrated
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by the simple2 example.
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Copyright (c) 2005-2009 by Educational Technology Resources, Inc.
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Others may also hold copyrights on code in this file. See the CREDITS
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file in the top directory of the distribution for details.
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This file is part of MySQL++.
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MySQL++ is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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MySQL++ is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with MySQL++; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
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USA
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***********************************************************************/
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#include "cmdline.h"
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#include "printdata.h"
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#include <mysql++.h>
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#include <iostream>
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#include <iomanip>
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using namespace std;
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int
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main(int argc, char *argv[])
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{
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// Get database access parameters from command line
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mysqlpp::examples::CommandLine cmdline(argc, argv);
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if (!cmdline) {
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return 1;
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}
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// Connect to the sample database.
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mysqlpp::Connection conn(false);
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if (conn.connect(mysqlpp::examples::db_name, cmdline.server(),
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cmdline.user(), cmdline.pass())) {
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// Ask for all rows from the sample stock table and display
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// them. Unlike simple2 example, we retreive each row one at
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// a time instead of storing the entire result set in memory
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// and then iterating over it.
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mysqlpp::Query query = conn.query("select * from stock");
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if (mysqlpp::UseQueryResult res = query.use()) {
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// Display header
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cout.setf(ios::left);
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cout << setw(31) << "Item" <<
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setw(10) << "Num" <<
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setw(10) << "Weight" <<
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setw(10) << "Price" <<
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"Date" << endl << endl;
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// Get each row in result set, and print its contents
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while (mysqlpp::Row row = res.fetch_row()) {
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cout << setw(30) << row["item"] << ' ' <<
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setw(9) << row["num"] << ' ' <<
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setw(9) << row["weight"] << ' ' <<
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setw(9) << row["price"] << ' ' <<
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setw(9) << row["sdate"] <<
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endl;
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}
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// Check for error: can't distinguish "end of results" and
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// error cases in return from fetch_row() otherwise.
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if (conn.errnum()) {
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cerr << "Error received in fetching a row: " <<
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conn.error() << endl;
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return 1;
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}
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return 0;
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}
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else {
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cerr << "Failed to get stock item: " << query.error() << endl;
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return 1;
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}
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}
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else {
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cerr << "DB connection failed: " << conn.error() << endl;
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return 1;
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}
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}
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