Add support for object sections

Sections are an optimization mechanism that allows the partitioning of
data members of a persistent class into groups that can be separately
loaded and/or updated.

1 files changed, 52 insertions, 0 deletions

diff --git a/odb/pgsql/section-statements.txx b/odb/pgsql/section-statements.txx
new file mode 100644
index 0000000..d4463d1
--- /dev/null
+++ b/odb/pgsql/section-statements.txx
@@ -0,0 +1,52 @@
+// file      : odb/pgsql/section-statements.txx
+// copyright : Copyright (c) 2005-2013 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#include <cstring> // std::memset
+
+namespace odb
+{
+  namespace pgsql
+  {
+    template <typename T, typename ST>
+    section_statements<T, ST>::
+    section_statements (connection_type& conn,
+                        image_type& im,
+                        binding& id,
+                        binding& idv,
+                        native_binding& idn,
+                        const Oid* idt)
+        : conn_ (conn),
+          image_ (im),
+          id_binding_ (id),
+          idv_binding_ (idv),
+          id_native_binding_ (idn),
+          id_types_ (idt),
+          select_image_binding_ (select_image_bind_,
+                                 select_column_count +
+                                 managed_optimistic_load_column_count),
+          update_image_binding_ (update_image_bind_,
+                                 update_column_count + id_column_count +
+                                 managed_optimistic_update_column_count),
+          update_image_native_binding_ (update_image_values_,
+                                        update_image_lengths_,
+                                        update_image_formats_,
+                                        update_column_count + id_column_count +
+                                        managed_optimistic_update_column_count)
+    {
+      select_image_version_ = 0;
+      update_image_version_ = 0;
+      update_id_binding_version_ = 0;
+
+      std::memset (select_image_bind_, 0, sizeof (select_image_bind_));
+      std::memset (
+        select_image_truncated_, 0, sizeof (select_image_truncated_));
+      std::memset (update_image_bind_, 0, sizeof (update_image_bind_));
+
+      for (std::size_t i (0);
+           i < select_column_count + managed_optimistic_load_column_count;
+           ++i)
+        select_image_bind_[i].truncated = select_image_truncated_ + i;
+    }
+  }
+}