sqt::Result< SELECTER > Class Template Reference

#include <sqt/orm/executor/result.h>

Description

template<SelecterType SELECTER>
class sqt::Result< SELECTER >

Represents the result of a selecter, providing interfaces to retrieve the result elements.

Template Parameters

SELECTER

The selecter type on which this result is based. The type of the result elements is determined by the selecter type.

A sqt::Result<> instance is returned by the sqt::Executor<>::Execute() method when a selecter is used as the argument. It provides a container-like interface to iterate over the result elements.

The type of the result elements is determined by the selecter type. The following list is the possible result element types:

• The entity type, if the selecter is created by the sqt::DataContext::MakeSelecter() method.
• A composite value type (a std::tuple<> of the specified columns' value types), if the selecter is created by the sqt::DataContext::MakeSelecter(const COLUMNS&&...) method.

The sqt::Result<> instances are intended to be one-time use only. Do not store the instances for any purpose. If the same query needs to be executed again, reset the executor and execute again to create a new sqt::Result<> instance.

See also

sqt::DataContext<>

sqt::Executor<>

sqt::SelecterType

Public Types
using	value_type = SELECTER::ResultElementType
using	iterator = Iterator<SELECTER>
using	const_iterator = iterator

Public Member Functions
	Result (Statement &statement) noexcept
	Result (Result &)=delete
Result &	operator= (const Result &)=delete
iterator	begin () const
iterator	end () const noexcept
const_iterator	cbegin () const
const_iterator	cend () const noexcept
std::vector< value_type >	ToVector () const
std::list< value_type >	ToList () const
std::deque< value_type >	ToDeque () const