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79 lines
3.0 KiB
C++
79 lines
3.0 KiB
C++
/*
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* Copyright (c) 2013-2015, 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 "Sample.h"
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#include "MockDb.h"
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#include <sqlpp11/select.h>
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#include <sqlpp11/alias_provider.h>
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#include <iostream>
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int With(int, char*[])
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{
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MockDb db;
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MockDb::_serializer_context_t printer = {};
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const auto t = test::TabBar{};
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auto x = sqlpp::cte(sqlpp::alias::x).as(select(all_of(t)).from(t));
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db(with(x)(select(x.alpha).from(x).unconditionally()));
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auto y0 = sqlpp::cte(sqlpp::alias::y).as(select(all_of(t)).from(t));
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auto y = y0.union_all(select(all_of(y0)).from(y0).unconditionally());
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std::cout << serialize(y, printer).str() << std::endl;
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printer.reset();
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std::cout << serialize(from_table(y), printer).str() << std::endl;
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db(with(y)(select(y.alpha).from(y).unconditionally()));
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using ::sqlpp::alias::a;
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using ::sqlpp::alias::b;
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const auto c =
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sqlpp::cte(b).as(select(t.alpha.as(a)).from(t).unconditionally().union_all(select(sqlpp::value(123).as(a))));
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db(with(c)(select(all_of(c)).from(c).unconditionally()));
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// recursive CTE with join
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{
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const auto selectBase = select(t.alpha, t.delta).from(t).where(t.alpha > 17);
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const auto initialCte = ::sqlpp::cte(sqlpp::alias::a).as(selectBase);
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const auto recursiveCte = initialCte.union_all(
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select(t.alpha, t.delta).from(t.join(initialCte).on(t.alpha == initialCte.delta)).unconditionally());
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const auto query = with(recursiveCte)(select(recursiveCte.alpha).from(recursiveCte).unconditionally());
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::MockDb::_serializer_context_t printer = {};
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const auto serializedQuery = serialize(query, printer).str();
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std::cout << serializedQuery << '\n';
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auto db = MockDb{};
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for (const auto& row : db(query))
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{
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std::cout << row.alpha;
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}
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}
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return 0;
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}
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