99 lines
3.3 KiB
C++
99 lines
3.3 KiB
C++
/***********************************************************************
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tquery2.cpp - Same as tquery1.cpp, except that it passes the template
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query parameters in a SQLQueryParms object, instead of separately.
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This is useful when the calling code doesn't know in advance how
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many parameters there will be. This is most likely because the
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templates are coming from somewhere else, or being generated.
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Copyright (c) 1998 by Kevin Atkinson, (c) 1999-2001 by MySQL AB, and
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(c) 2004-2009 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 <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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// Build a template query to retrieve a stock item given by
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// item name.
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mysqlpp::Query query = con.query(
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"select * from stock where item = %0q");
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query.parse();
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// Retrieve an item added by resetdb; it won't be there if
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// tquery* or ssqls3 is run since resetdb.
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mysqlpp::SQLQueryParms sqp;
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sqp << "Nürnberger Brats";
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mysqlpp::StoreQueryResult res1 = query.store(sqp);
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if (res1.empty()) {
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throw mysqlpp::BadQuery("UTF-8 bratwurst item not found in "
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"table, run resetdb");
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}
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// Replace the proper German name with a 7-bit ASCII
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// approximation using a different template query.
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query.reset(); // forget previous template query info
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query << "update stock set item = %0q where item = %1q";
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query.parse();
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sqp.clear();
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sqp << "Nuerenberger Bratwurst" << res1[0][0].c_str();
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mysqlpp::SimpleResult res2 = query.execute(sqp);
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// Print the new table contents.
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print_stock_table(query);
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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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