diff options
author | Boris Kolpackov <boris@codesynthesis.com> | 2011-09-06 16:56:07 +0200 |
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committer | Boris Kolpackov <boris@codesynthesis.com> | 2011-09-06 16:56:07 +0200 |
commit | 7ce07d1c371e32e474897e8b03da7e330aaefb57 (patch) | |
tree | 2ee49af4fc317f189b9b12259fbabf16712cddb4 /odb/pgsql/view-result.txx | |
parent | 3ee1f474f72d093e27974e040372c53342702b12 (diff) |
Support for views; native part
Diffstat (limited to 'odb/pgsql/view-result.txx')
-rw-r--r-- | odb/pgsql/view-result.txx | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/odb/pgsql/view-result.txx b/odb/pgsql/view-result.txx new file mode 100644 index 0000000..63e5444 --- /dev/null +++ b/odb/pgsql/view-result.txx @@ -0,0 +1,95 @@ +// file : odb/pgsql/view-result.txx +// author : Constantin Michael <constantin@codesynthesis.com> +// copyright : Copyright (c) 2009-2011 Code Synthesis Tools CC +// license : GNU GPL v2; see accompanying LICENSE file + +#include <odb/callback.hxx> + +#include <odb/pgsql/view-statements.hxx> + +namespace odb +{ + namespace pgsql + { + template <typename T> + result_impl<T, class_view>:: + ~result_impl () + { + } + + template <typename T> + result_impl<T, class_view>:: + result_impl (const query&, + details::shared_ptr<select_statement> statement, + view_statements<view_type>& statements) + : base_type (statements.connection ().database ()), + statement_ (statement), + statements_ (statements) + { + } + + template <typename T> + void result_impl<T, class_view>:: + load (view_type& view) + { + // The image can grow between calls to load() as a result of other + // statements execution. + // + typename view_traits::image_type& im (statements_.image ()); + + if (im.version != statements_.image_version ()) + { + binding& b (statements_.image_binding ()); + view_traits::bind (b.bind, im); + statements_.image_version (im.version); + b.version++; + } + + select_statement::result r (statement_->load ()); + + if (r == select_statement::truncated) + { + if (view_traits::grow (im, statements_.image_truncated ())) + im.version++; + + if (im.version != statements_.image_version ()) + { + binding& b (statements_.image_binding ()); + view_traits::bind (b.bind, im); + statements_.image_version (im.version); + b.version++; + statement_->reload (); + } + } + + odb::database& db (this->database ()); + + view_traits::callback (db, view, callback_event::pre_load); + view_traits::init (view, im); + view_traits::callback (db, view, callback_event::post_load); + } + + template <typename T> + void result_impl<T, class_view>:: + next () + { + this->current (pointer_type ()); + + if (!statement_->next ()) + this->end_ = true; + } + + template <typename T> + void result_impl<T, class_view>:: + cache () + { + } + + template <typename T> + std::size_t result_impl<T, class_view>:: + size () + { + return statement_->result_size (); + } + } +} |