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70 lines
2.8 KiB
C++
70 lines
2.8 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 <iostream>
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#include "Sample.h"
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#include "MockDb.h"
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#include <sqlpp11/sqlpp11.h>
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#include <sqlpp11/custom_query.h>
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int CustomQuery(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 f = test::TabFoo{};
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const auto t = test::TabBar{};
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// A void custom query
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printer.reset();
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auto x = custom_query(sqlpp::verbatim("PRAGMA writeable_schema = "), true);
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std::cerr << serialize(x, printer).str() << std::endl;
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db(x);
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// Syntactically, it is possible to use this void query as a prepared statement, too, not sure, whether this makes
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// sense very often...
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db(db.prepare(x));
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// A prepared custom select
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// The return type of the custom query is determined from the first argument which does have a return type, in this
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// case the select
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auto p = db.prepare(custom_query(select(all_of(t)).from(t), where(t.alpha > sqlpp::parameter(t.alpha))));
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p.params.alpha = 8;
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for (const auto& row : db(p))
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{
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std::cerr << row.alpha << std::endl;
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}
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// A custom (select ... into) with adjusted return type
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// The first argument with a return type is the select, but the custom query is really an insert. Thus, we tell it so.
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printer.reset();
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auto c = custom_query(select(all_of(t)).from(t), into(f)).with_result_type_of(insert_into(f));
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std::cerr << serialize(c, printer).str() << std::endl;
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auto i = db(c);
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static_assert(std::is_integral<decltype(i)>::value, "insert yields an integral value");
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return 0;
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}
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