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Add provided tables to select_as.

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This commit is contained in:
Roland Bock 2024-08-30 13:52:35 +02:00
parent 31cb9c31ab
commit cf4af171fd
1 changed files with 21 additions and 2 deletions
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23
include/sqlpp11/core/clause/select_as.h
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@ -81,15 +81,34 @@ namespace sqlpp
template<typename Select, typename AliasProvider, typename... ColumnSpecs>
struct name_tag_of<select_as_t<Select, AliasProvider, ColumnSpecs...>> : name_tag_of<AliasProvider> {};
#warning: Is this (_can_be_used_as_table) required for use as a named value, too?
template <typename Select, typename AliasProvider, typename... ColumnSpecs>
struct is_table<select_as_t<Select, AliasProvider, ColumnSpecs...>>
: std::integral_constant<bool, Select::_can_be_used_as_table()>
{
};
#warning: V1.0 has empty nodes. Is that correct? In either case document the decision here.
template <typename Select, typename AliasProvider, typename... ColumnSpecs>
struct provided_tables_of<select_as_t<Select, AliasProvider, ColumnSpecs...>>
: public std::conditional<Select::_can_be_used_as_table(),
sqlpp::detail::type_vector<select_as_t<Select, AliasProvider, ColumnSpecs...>>,
sqlpp::detail::type_vector<>>
{
};
template <typename Select, typename AliasProvider, typename... ColumnSpecs>
struct provided_static_tables_of<select_as_t<Select, AliasProvider, ColumnSpecs...>>
: public provided_tables_of<select_as_t<Select, AliasProvider, ColumnSpecs...>>
{
};
template <typename Select, typename AliasProvider, typename... ColumnSpecs>
struct provided_optional_tables_of<select_as_t<Select, AliasProvider, ColumnSpecs...>>
: public provided_tables_of<select_as_t<Select, AliasProvider, ColumnSpecs...>>
{
};
#warning: V1.0 has empty nodes. Is that correct? In either case document the decision here.
#warning: Need to add required tables of
template <typename Context, typename Select, typename AliasProvider, typename... ColumnSpecs>
auto to_sql_string(Context& context, const select_as_t<Select, AliasProvider, ColumnSpecs...>& t) -> std::string