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Added explicit without_table_check function

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This removes the "required" tables from an expression
This commit is contained in:
rbock 2016-03-16 18:17:28 +01:00
parent a836e8c8d8
commit 201b060d24
3 changed files with 82 additions and 3 deletions
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3
include/sqlpp11/sqlpp11.h
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2013-2015, Roland Bock
* Copyright (c) 2013-2016, Roland Bock
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
@ -36,6 +36,7 @@
#include <sqlpp11/functions.h>
#include <sqlpp11/transaction.h>
#include <sqlpp11/boolean_expression.h>
#include <sqlpp11/without_table_check.h>
#include <sqlpp11/schema_qualified_table.h>
#endif

77
include/sqlpp11/without_table_check.h Normal file
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@ -0,0 +1,77 @@
/*
* Copyright (c) 2016-2016, 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.
*/
#ifndef SQLPP_WITHOUT_TABLE_CHECK_H
#define SQLPP_ALIAS_H
#include <sqlpp11/type_traits.h>
#include <sqlpp11/serializer.h>
namespace sqlpp
{
template <typename Expression>
struct without_table_check_t
{
using _traits = typename Expression::_traits;
using _nodes = detail::type_vector<Expression>;
using _required_tables = detail::type_set<>;
without_table_check_t(Expression expression) : _expression(expression)
{
}
without_table_check_t(const without_table_check_t&) = default;
without_table_check_t(without_table_check_t&&) = default;
without_table_check_t& operator=(const without_table_check_t&) = default;
without_table_check_t& operator=(without_table_check_t&&) = default;
~without_table_check_t() = default;
Expression _expression;
};
template <typename Context, typename Expression>
struct serializer_t<Context, without_table_check_t<Expression>>
{
using _serialize_check = serialize_check_of<Context, Expression>;
using T = without_table_check_t<Expression>;
static Context& _(const T& t, Context& context)
{
serialize(t._expression, context);
return context;
}
};
template <typename Expression>
auto without_table_check(Expression expr) -> without_table_check_t<Expression>
{
static_assert(is_expression_t<Expression>::value, "invalid argument (expression expected)");
return {expr};
}
}
#endif

5
tests/SelectType.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2013-2015, Roland Bock
* Copyright (c) 2013-2016, Roland Bock
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
@ -31,6 +31,7 @@
#include <sqlpp11/select.h>
#include <sqlpp11/functions.h>
#include <sqlpp11/connection.h>
#include <sqlpp11/without_table_check.h>
namespace alias
{
@ -327,7 +328,7 @@ int SelectType(int, char* [])
{
auto s = dynamic_select(db, all_of(t)).dynamic_from(t).dynamic_where().dynamic_limit().dynamic_offset();
s.from.add(dynamic_join(f).on(f.omega > t.alpha));
s.where.add_ntc(t.alpha > 7 and t.alpha == any(select(t.alpha).from(t).where(t.alpha < 3)));
s.where.add(without_table_check(f.omega > 7 and t.alpha == any(select(t.alpha).from(t).where(t.alpha < 3))));
s.limit.set(30);
s.limit.set(3);
std::cerr << "------------------------\n";