101 lines
3.3 KiB
C++
101 lines
3.3 KiB
C++
/***********************************************************************
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ssqls4.cpp - Example very similar to ssqls1.cpp, except that it
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stores its result set in an STL set container. This demonstrates
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how one can manipulate MySQL++ result sets in a very natural C++
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style.
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Copyright (c) 1998 by Kevin Atkinson, (c) 1999-2001 by MySQL AB, and
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(c) 2004-2010 by Educational Technology Resources, Inc. Others may
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also hold copyrights on code in this file. See the CREDITS.txt file
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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 "stock.h"
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#include <iostream>
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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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try {
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// Establish the connection to the database server.
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mysqlpp::Connection con(mysqlpp::examples::db_name,
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cmdline.server(), cmdline.user(), cmdline.pass());
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// Retrieve all rows from the stock table and put them in an
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// STL set. Notice that this works just as well as storing them
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// in a vector, which we did in ssqls1.cpp. It works because
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// SSQLS objects are less-than comparable.
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mysqlpp::Query query = con.query("select * from stock");
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set<stock> res;
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query.storein(res);
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// Display the result set. Since it is an STL set and we set up
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// the SSQLS to compare based on the item column, the rows will
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// be sorted by item.
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print_stock_header(res.size());
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set<stock>::iterator it;
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cout.precision(3);
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for (it = res.begin(); it != res.end(); ++it) {
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print_stock_row(it->item.c_str(), it->num, it->weight,
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it->price, it->sDate);
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}
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// Use set's find method to look up a stock item by item name.
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// This also uses the SSQLS comparison setup.
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it = res.find(stock("Hotdog Buns"));
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if (it != res.end()) {
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cout << endl << "Currently " << it->num <<
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" hotdog buns in stock." << endl;
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}
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else {
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cout << endl << "Sorry, no hotdog buns in stock." << endl;
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}
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}
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catch (const mysqlpp::BadQuery& er) {
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// Handle any query errors
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cerr << "Query error: " << er.what() << endl;
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return -1;
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}
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catch (const mysqlpp::BadConversion& er) {
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// Handle bad conversions
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cerr << "Conversion error: " << er.what() << endl <<
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"\tretrieved data size: " << er.retrieved <<
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", actual size: " << er.actual_size << endl;
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return -1;
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}
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catch (const mysqlpp::Exception& er) {
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// Catch-all for any other MySQL++ exceptions
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cerr << "Error: " << er.what() << 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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