mirror of
https://github.com/rbock/sqlpp11.git
synced 2024-11-16 04:47:18 +08:00
68 lines
2.7 KiB
C++
68 lines
2.7 KiB
C++
/*
|
|
* 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;
|
|
|
|
test::TabFoo f;
|
|
test::TabBar t;
|
|
|
|
// 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;
|
|
}
|