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dff8c23b22
Add support for connection pooling * Add support for connection pooling to the core code. * Add support for PostgreSQL connection pooling with tests. * Add support for SQLite3 connection pooling with tests. * Add support for MySQL connection pooling with tests.
71 lines
2.5 KiB
C++
71 lines
2.5 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 "make_test_connection.h"
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#include "TabSample.h"
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#include <sqlpp11/mysql/connection.h>
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#include <sqlpp11/sqlpp11.h>
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#include <iostream>
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const auto library_raii = sqlpp::mysql::scoped_library_initializer_t{0, nullptr, nullptr};
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namespace sql = sqlpp::mysql;
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const auto tab = TabSample{};
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int Union(int, char*[])
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{
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sql::global_library_init();
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try
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{
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auto db = sql::make_test_connection();
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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 bool DEFAULT NULL,
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gamma varchar(255) DEFAULT NULL,
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PRIMARY KEY (alpha)
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))");
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auto u = select(all_of(tab)).from(tab).unconditionally().union_all(select(all_of(tab)).from(tab).unconditionally());
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for (const auto& row : db(u))
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{
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std::cout << row.alpha << row.beta << row.gamma << std::endl;
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}
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for (const auto& row : db(u.union_distinct(select(all_of(tab)).from(tab).unconditionally())))
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{
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std::cout << row.alpha << row.beta << row.gamma << 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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return 0;
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}
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