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Diffstat (limited to 'libodb-pgsql/odb/pgsql/view-result.txx')
-rw-r--r-- | libodb-pgsql/odb/pgsql/view-result.txx | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/libodb-pgsql/odb/pgsql/view-result.txx b/libodb-pgsql/odb/pgsql/view-result.txx new file mode 100644 index 0000000..980811a --- /dev/null +++ b/libodb-pgsql/odb/pgsql/view-result.txx @@ -0,0 +1,114 @@ +// file : odb/pgsql/view-result.txx +// 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> + view_result_impl<T>:: + ~view_result_impl () + { + if (!this->end_) + statement_->free_result (); + } + + template <typename T> + void view_result_impl<T>:: + invalidate () + { + if (!this->end_) + { + statement_->free_result (); + this->end_ = true; + } + + statement_.reset (); + } + + template <typename T> + view_result_impl<T>:: + view_result_impl (const query_base&, + details::shared_ptr<select_statement> statement, + statements_type& statements, + const schema_version_migration* svm) + : base_type (statements.connection ()), + statement_ (statement), + statements_ (statements), + tc_ (svm), + count_ (0) + { + } + + template <typename T> + void view_result_impl<T>:: + 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 ()); + tc_.bind (b.bind, im); + statements_.image_version (im.version); + b.version++; + } + + select_statement::result r (statement_->load ()); + + if (r == select_statement::truncated) + { + if (tc_.grow (im, statements_.image_truncated ())) + im.version++; + + if (im.version != statements_.image_version ()) + { + binding& b (statements_.image_binding ()); + tc_.bind (b.bind, im); + statements_.image_version (im.version); + b.version++; + statement_->reload (); + } + } + + view_traits::callback (this->db_, view, callback_event::pre_load); + tc_.init (view, im, &this->db_); + view_traits::callback (this->db_, view, callback_event::post_load); + } + + template <typename T> + void view_result_impl<T>:: + next () + { + this->current (pointer_type ()); + + if (statement_->next ()) + count_++; + else + { + statement_->free_result (); + this->end_ = true; + } + } + + template <typename T> + void view_result_impl<T>:: + cache () + { + } + + template <typename T> + std::size_t view_result_impl<T>:: + size () + { + return this->end_ ? count_ : statement_->result_size (); + } + } +} |