mirror of
https://github.com/rbock/sqlpp11.git
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208 lines
8.0 KiB
C++
208 lines
8.0 KiB
C++
/*
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* Copyright (c) 2013 - 2016, Roland Bock
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "TabSample.h"
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#include <sqlpp11/mysql/mysql.h>
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#include <sqlpp11/sqlpp11.h>
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#include <cassert>
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#include <iostream>
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#include <vector>
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SQLPP_ALIAS_PROVIDER(left)
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SQLPP_ALIAS_PROVIDER(right)
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namespace mysql = sqlpp::mysql;
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int main()
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{
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mysql::global_library_init();
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auto config = std::make_shared<mysql::connection_config>();
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config->user = "root";
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config->database = "sqlpp_mysql";
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config->debug = true;
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try
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{
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mysql::connection db(config);
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}
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catch (const sqlpp::exception& e)
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{
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std::cerr << "For testing, you'll need to create a database sqlpp_mysql for user root (no password)" << std::endl;
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std::cerr << e.what() << std::endl;
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return 1;
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}
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try
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{
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mysql::connection db(config);
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db.execute(R"(DROP TABLE IF EXISTS tab_sample)");
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db.execute(R"(CREATE TABLE tab_sample (
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alpha bigint(20) AUTO_INCREMENT,
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beta varchar(255) DEFAULT NULL,
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gamma bool DEFAULT NULL,
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PRIMARY KEY (alpha)
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))");
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db.execute(R"(DROP TABLE IF EXISTS tab_foo)");
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db.execute(R"(CREATE TABLE tab_foo (
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omega bigint(20) DEFAULT NULL
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))");
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assert(not db(select(sqlpp::value(false).as(sqlpp::alias::a))).front().a);
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const auto tab = TabSample{};
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// clear the table
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db(remove_from(tab).unconditionally());
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// Several ways of ensuring that tab is empty
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assert(not db(select(exists(select(tab.alpha).from(tab).unconditionally())))
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.front()
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.exists); // this is probably the fastest
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assert(not db(select(count(tab.alpha)).from(tab).unconditionally()).front().count);
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assert(db(select(tab.alpha).from(tab).unconditionally()).empty());
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// explicit all_of(tab)
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std::cerr << __FILE__ << ": " << __LINE__ << std::endl;
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select(all_of(tab)).from(tab);
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std::cerr << __FILE__ << ": " << __LINE__ << std::endl;
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db(select(all_of(tab)).from(tab).unconditionally());
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std::cerr << __FILE__ << ": " << __LINE__ << std::endl;
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for (const auto& row : db(select(all_of(tab)).from(tab).unconditionally()))
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{
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std::cerr << __FILE__ << ": " << __LINE__ << std::endl;
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std::cerr << "row.alpha: " << row.alpha << ", row.beta: " << row.beta << ", row.gamma: " << row.gamma
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<< std::endl;
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};
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// insert
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db(insert_into(tab).default_values());
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const auto x = select(all_of(tab)).from(tab).unconditionally();
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const auto y = db.prepare(x);
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for (const auto& row : db(db.prepare(select(all_of(tab)).from(tab).unconditionally())))
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{
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std::cerr << "alpha: " << row.alpha.is_null() << std::endl;
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std::cerr << "beta: " << row.beta.is_null() << std::endl;
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std::cerr << "gamma: " << row.gamma.is_null() << std::endl;
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}
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db(insert_into(tab).set(tab.beta = "kaesekuchen", tab.gamma = true));
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db(insert_into(tab).default_values());
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db(insert_into(tab).set(tab.beta = "", tab.gamma = true));
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// update
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db(update(tab).set(tab.gamma = false).where(tab.alpha.in(sqlpp::value_list(std::vector<int>{1, 2, 3, 4}))));
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db(update(tab).set(tab.gamma = true).where(tab.alpha.in(1)));
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// remove
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db(remove_from(tab).where(tab.alpha == tab.alpha + 3));
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std::cerr << "+++++++++++++++++++++++++++" << std::endl;
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for (const auto& row : db(select(all_of(tab)).from(tab).unconditionally()))
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{
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std::cerr << __LINE__ << " row.beta: " << row.beta << std::endl;
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}
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std::cerr << "+++++++++++++++++++++++++++" << std::endl;
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decltype(db(select(all_of(tab)).from(tab).unconditionally())) result;
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result = db(select(all_of(tab)).from(tab).unconditionally());
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std::cerr << "Accessing a field directly from the result (using the current row): " << result.begin()->alpha
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<< std::endl;
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std::cerr << "Can do that again, no problem: " << result.begin()->alpha << std::endl;
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auto tx = start_transaction(db);
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if (const auto& row =
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*db(select(all_of(tab), select(max(tab.alpha)).from(tab)).from(tab).unconditionally()).begin())
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{
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int a = row.alpha;
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int m = row.max;
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std::cerr << __LINE__ << " row.alpha: " << a << ", row.max: " << m << std::endl;
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}
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tx.commit();
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TabFoo foo;
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for (const auto& row : db(select(tab.alpha).from(tab.join(foo).on(tab.alpha == foo.omega)).unconditionally()))
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{
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std::cerr << row.alpha << std::endl;
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}
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for (const auto& row :
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db(select(tab.alpha).from(tab.left_outer_join(foo).on(tab.alpha == foo.omega)).unconditionally()))
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{
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std::cerr << row.alpha << std::endl;
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}
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auto ps = db.prepare(select(all_of(tab))
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.from(tab)
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.where(tab.alpha != parameter(tab.alpha) and tab.beta != parameter(tab.beta) and
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tab.gamma != parameter(tab.gamma)));
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ps.params.alpha = 7;
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ps.params.beta = "wurzelbrunft";
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ps.params.gamma = true;
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for (const auto& row : db(ps))
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{
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std::cerr << "bound result: alpha: " << row.alpha << std::endl;
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std::cerr << "bound result: beta: " << row.beta << std::endl;
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std::cerr << "bound result: gamma: " << row.gamma << std::endl;
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}
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std::cerr << "--------" << std::endl;
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ps.params.gamma = "false";
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for (const auto& row : db(ps))
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{
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std::cerr << "bound result: alpha: " << row.alpha << std::endl;
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std::cerr << "bound result: beta: " << row.beta << std::endl;
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std::cerr << "bound result: gamma: " << row.gamma << std::endl;
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}
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std::cerr << "--------" << std::endl;
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ps.params.beta = "kaesekuchen";
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for (const auto& row : db(ps))
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{
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std::cerr << "bound result: alpha: " << row.alpha << std::endl;
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std::cerr << "bound result: beta: " << row.beta << std::endl;
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std::cerr << "bound result: gamma: " << row.gamma << std::endl;
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}
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auto pi = db.prepare(insert_into(tab).set(tab.beta = parameter(tab.beta), tab.gamma = true));
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pi.params.beta = "prepared cake";
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std::cerr << "Inserted: " << db(pi) << std::endl;
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auto pu = db.prepare(update(tab).set(tab.gamma = parameter(tab.gamma)).where(tab.beta == "prepared cake"));
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pu.params.gamma = false;
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std::cerr << "Updated: " << db(pu) << std::endl;
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auto pr = db.prepare(remove_from(tab).where(tab.beta != parameter(tab.beta)));
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pr.params.beta = "prepared cake";
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std::cerr << "Deleted lines: " << db(pr) << std::endl;
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for (const auto& row : db(select(case_when(tab.gamma).then(tab.alpha).else_(foo.omega).as(tab.alpha))
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.from(tab.cross_join(foo))
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.unconditionally()))
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{
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std::cerr << row.alpha << std::endl;
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}
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}
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catch (const std::exception& e)
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{
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std::cerr << "Exception: " << e.what() << std::endl;
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return 1;
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}
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}
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