mirror of
https://github.com/rbock/sqlpp11.git
synced 2024-11-16 04:47:18 +08:00
122 lines
4.3 KiB
C++
122 lines
4.3 KiB
C++
/*
|
|
* Copyright (c) 2013-2016, 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_TABLE_ALIAS_H
|
|
#define SQLPP_TABLE_ALIAS_H
|
|
|
|
#include <sqlpp11/column_fwd.h>
|
|
#include <sqlpp11/interpret.h>
|
|
#include <sqlpp11/type_traits.h>
|
|
#include <sqlpp11/join.h>
|
|
#include <sqlpp11/alias.h>
|
|
#include <sqlpp11/detail/type_set.h>
|
|
|
|
namespace sqlpp
|
|
{
|
|
// workaround for msvc bug https://connect.microsoft.com/VisualStudio/Feedback/Details/2173198
|
|
// template <typename AliasProvider, typename Table, typename... ColumnSpec>
|
|
// struct table_alias_t : public member_t<ColumnSpec, column_t<AliasProvider, ColumnSpec>>...
|
|
template <typename AliasProvider, typename Table, typename... ColumnSpec>
|
|
struct table_alias_t : public ColumnSpec::_alias_t::template _member_t<column_t<AliasProvider, ColumnSpec>>...
|
|
{
|
|
using _traits = make_traits<value_type_of<Table>,
|
|
tag::is_table,
|
|
tag::is_alias,
|
|
tag_if<tag::is_selectable, is_expression_t<Table>::value>>;
|
|
|
|
using _nodes = detail::type_vector<>;
|
|
using _required_ctes = required_ctes_of<Table>;
|
|
using _provided_tables = detail::type_set<AliasProvider>;
|
|
|
|
static_assert(required_tables_of<Table>::size::value == 0, "table aliases must not depend on external tables");
|
|
|
|
using _alias_t = typename AliasProvider::_alias_t;
|
|
using _column_tuple_t = std::tuple<column_t<AliasProvider, ColumnSpec>...>;
|
|
|
|
table_alias_t(Table table) : _table(table)
|
|
{
|
|
}
|
|
|
|
template <typename T>
|
|
auto join(T t) const -> decltype(::sqlpp::join(*this, t))
|
|
{
|
|
return ::sqlpp::join(*this, t);
|
|
}
|
|
|
|
template <typename T>
|
|
auto inner_join(T t) const -> decltype(::sqlpp::inner_join(*this, t))
|
|
{
|
|
return ::sqlpp::inner_join(*this, t);
|
|
}
|
|
|
|
template <typename T>
|
|
auto left_outer_join(T t) const -> decltype(::sqlpp::left_outer_join(*this, t))
|
|
{
|
|
return ::sqlpp::left_outer_join(*this, t);
|
|
}
|
|
|
|
template <typename T>
|
|
auto right_outer_join(T t) const -> decltype(::sqlpp::right_outer_join(*this, t))
|
|
{
|
|
return ::sqlpp::right_outer_join(*this, t);
|
|
}
|
|
|
|
template <typename T>
|
|
auto outer_join(T t) const -> decltype(::sqlpp::outer_join(*this, t))
|
|
{
|
|
return ::sqlpp::outer_join(*this, t);
|
|
}
|
|
|
|
template <typename T>
|
|
auto cross_join(T t) const -> decltype(::sqlpp::cross_join(*this, t))
|
|
{
|
|
return ::sqlpp::cross_join(*this, t);
|
|
}
|
|
|
|
Table _table;
|
|
};
|
|
|
|
template <typename Context, typename AliasProvider, typename Table, typename... ColumnSpec>
|
|
struct serializer_t<Context, table_alias_t<AliasProvider, Table, ColumnSpec...>>
|
|
{
|
|
using _serialize_check = serialize_check_of<Context, Table>;
|
|
using T = table_alias_t<AliasProvider, Table, ColumnSpec...>;
|
|
|
|
static Context& _(const T& t, Context& context)
|
|
{
|
|
if (requires_braces_t<T>::value)
|
|
context << "(";
|
|
serialize(t._table, context);
|
|
if (requires_braces_t<T>::value)
|
|
context << ")";
|
|
context << " AS " << name_of<T>::char_ptr();
|
|
return context;
|
|
}
|
|
};
|
|
}
|
|
|
|
#endif
|