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Merge branch 'release/0.35'

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rbock
2015-12-29 11:03:17 +01:00
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tests/CustomQuery.cpp Normal file
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/*
* Copyright (c) 2013-2015, Roland Bock
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <iostream>
#include "Sample.h"
#include "MockDb.h"
#include <sqlpp11/sqlpp11.h>
#include <sqlpp11/custom_query.h>
int CustomQuery(int, char* [])
{
MockDb db = {};
MockDb::_serializer_context_t printer = {};
const auto f = test::TabFoo{};
const auto t = test::TabBar{};
// A void custom query
printer.reset();
auto x = custom_query(sqlpp::verbatim("PRAGMA writeable_schema = "), true);
std::cerr << serialize(x, printer).str() << std::endl;
db(x);
// Syntactically, it is possible to use this void query as a prepared statement, too, not sure, whether this makes
// sense very often...
db(db.prepare(x));
// A prepared custom select
// The return type of the custom query is determined from the first argument which does have a return type, in this
// case the select
auto p = db.prepare(custom_query(select(all_of(t)).from(t), where(t.alpha > sqlpp::parameter(t.alpha))));
p.params.alpha = 8;
for (const auto& row : db(p))
{
std::cerr << row.alpha << std::endl;
}
// A custom (select ... into) with adjusted return type
// The first argument with a return type is the select, but the custom query is really an insert. Thus, we tell it so.
printer.reset();
auto c = custom_query(select(all_of(t)).from(t), into(f)).with_result_type_of(insert_into(f));
std::cerr << serialize(c, printer).str() << std::endl;
auto i = db(c);
static_assert(std::is_integral<decltype(i)>::value, "insert yields an integral value");
return 0;
}