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Transport can_be_null into subselect used as a result column

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rbock
2014-07-24 17:36:56 +02:00
parent 556023f921
commit 6f056ced8a
3 changed files with 15 additions and 4 deletions
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1
include/sqlpp11/select_column_list.h
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@@ -54,7 +54,6 @@ namespace sqlpp
template<typename Column>
struct select_traits<Column>
{
#warning need to transport the "can be null information here"
using _traits = make_traits<value_type_of<Column>, tag::select_column_list, tag::return_value, tag::expression, tag::named_expression>;
using _name_t = typename Column::_name_t;
};

12
include/sqlpp11/statement.h
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@@ -112,7 +112,12 @@ namespace sqlpp
using _provided_outer_tables = detail::type_set<>;
using _extra_tables = detail::type_set<>;
using _parameters = detail::make_parameter_tuple_t<parameters_of<Policies>...>;
using _can_be_null = detail::any_t<can_be_null_t<_value_type>::value>;
using _can_be_null = detail::any_t<
can_be_null_t<_result_type_provider>::value,
::sqlpp::detail::make_intersect_set_t<
required_tables_of<_result_type_provider>,
provided_outer_tables_of<statement_policies_t>
>::size::value>;
};
};
}
@@ -128,7 +133,10 @@ namespace sqlpp
{
using _policies_t = typename detail::statement_policies_t<Db, Policies...>;
using _traits = make_traits<value_type_of<_policies_t>, ::sqlpp::tag::select, tag::expression_if<typename _policies_t::_is_expression>, tag::named_expression_if<typename _policies_t::_is_expression>>;
using _traits = make_traits<value_type_of<_policies_t>,
::sqlpp::tag::select,
tag::expression_if<typename _policies_t::_is_expression>,
tag::named_expression_if<typename _policies_t::_is_expression>>;
using _recursive_traits = typename _policies_t::_recursive_traits;
using _used_outer_tables = typename _policies_t::_all_provided_outer_tables;

6
include/sqlpp11/verbatim_table.h
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@@ -46,9 +46,13 @@ namespace sqlpp
};
}
#warning a verbatim table is always an outer table
struct verbatim_table_t: public sqlpp::table_t<verbatim_table_t, detail::unusable_pseudo_column_t>
{
struct _recursive_traits: public sqlpp::table_t<verbatim_table_t, detail::unusable_pseudo_column_t>::_recursive_traits
{
using _provided_outer_tables = detail::type_set<verbatim_table_t>;
};
struct _name_t {};
verbatim_table_t(std::string representation):