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// file : odb/mysql/result.txx
// author : Boris Kolpackov <boris@codesynthesis.com>
// copyright : Copyright (c) 2009-2010 Code Synthesis Tools CC
// license : GNU GPL v2; see accompanying LICENSE file
namespace odb
{
namespace mysql
{
template <typename T>
result_impl<T>::
~result_impl ()
{
}
template <typename T>
result_impl<T>::
result_impl (details::shared_ptr<select_statement> statement,
object_statements<T>& statements)
: statement_ (statement), statements_ (statements)
{
next ();
}
template <typename T>
void result_impl<T>::
current (T& x)
{
if (!this->end_)
traits::init (
x, statements_.image (), statements_.connection ().database ());
}
template <typename T>
void result_impl<T>::
next ()
{
this->current (pointer_type ());
// If the result was cached the image can grow between calls
// to next() as a result of other statements execution.
//
if (statement_->cached ())
{
typename traits::image_type& im (statements_.image ());
if (im.version != statements_.out_image_version ())
{
binding& b (statements_.out_image_binding ());
traits::bind (b.bind, im, true);
statements_.out_image_version (im.version);
b.version++;
}
}
select_statement::result r (statement_->fetch ());
switch (r)
{
case select_statement::truncated:
{
typename traits::image_type& im (statements_.image ());
traits::grow (im, statements_.out_image_error ());
if (im.version != statements_.out_image_version ())
{
binding& b (statements_.out_image_binding ());
traits::bind (b.bind, im, true);
statements_.out_image_version (im.version);
b.version++;
statement_->refetch ();
}
// Fall throught.
}
case select_statement::success:
{
break;
}
case select_statement::no_data:
{
this->end_ = true;
break;
}
}
}
template <typename T>
void result_impl<T>::
cache ()
{
statement_->cache ();
}
template <typename T>
std::size_t result_impl<T>::
size ()
{
return statement_->result_size ();
}
}
}
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