sqt::ColumnSelecter< COLUMNS > Class Template Reference

#include <sqt/orm/querier/selecter/column_selecter.h>

Inheritance diagram for sqt::ColumnSelecter< COLUMNS >:

Description

template<ColumnType... COLUMNS>
class sqt::ColumnSelecter< COLUMNS >

A primary selecter that selects specific columns from the table.

Template Parameters

COLUMNS...

The column types to be selected. Each column type must satisfy the sqt::ColumnType concept.

This primary selecter selects specific columns from the table without any clauses and returns them as a composite value type (a std::tuple<> of the selected columns' value types).

To create instances of this selecter, use the sqt::DataContext::MakeSelecter(const COLUMNS&...) method.

This class template satisfies the sqt::SelecterType concept.

See also

sqt::ColumnType

sqt::DataContext<>::MakeSelecter(const COLUMNS&... columns);

sqt::SelecterType

Public Types
using	CompositeColumnType = CompositeColumn<COLUMNS...>
using	ColumnsValueTraits = typename CompositeColumnType::ValueTraits
using	EntityType = typename CompositeColumnType::EntityType
using	ResultElementType = typename ColumnsValueTraits::ValueType

Static Public Member Functions
static ResultElementType	GetResultElement (Statement &statement)
Static Public Member Functions inherited from sqt::BaseSelecter< ColumnSelecter< COLUMNS... > >
static std::string_view	BuildSQL ()
static constexpr auto	BuildPlaceholderBinders () noexcept

Friends
class	BaseSelecter< ColumnSelecter< COLUMNS... > >

Additional Inherited Members
Public Member Functions inherited from sqt::BaseSelecter< ColumnSelecter< COLUMNS... > >
constexpr void	BindInlineParameters (Statement &) const noexcept
Public Member Functions inherited from sqt::WhereCapability< ColumnSelecter< COLUMNS... >, WhereSelectDecorator >
constexpr auto	Where (PREDICATE &&predicate) const
Public Member Functions inherited from sqt::OrderBySelectCapability< ColumnSelecter< COLUMNS... > >
constexpr auto	OrderBy (const TERMS &... terms) const
Public Member Functions inherited from sqt::LimitSelectCapability< ColumnSelecter< COLUMNS... > >
constexpr auto	Limit (std::size_t limit) const
Static Public Attributes inherited from sqt::BaseSelecter< ColumnSelecter< COLUMNS... > >
static constexpr std::size_t	ParameterIndex
static constexpr std::size_t	ParameterCount