Split 'in' binding into insert/update pair; rename 'out' to select

Also add the initial infrastructure for the readonly members support.
Right now the split insert/update bindings allows us to avoid sending
object id in UPDATE statements. It will also allows us to support
readonly members.

1 files changed, 7 insertions, 0 deletions

diff --git a/odb/pgsql/forward.hxx b/odb/pgsql/forward.hxx
index 0e1fb10..2ec44ec 100644
--- a/odb/pgsql/forward.hxx
+++ b/odb/pgsql/forward.hxx
@@ -23,6 +23,13 @@ namespace odb
 
     // Implementation details.
     //
+    enum statement_kind
+    {
+      statement_select,
+      statement_insert,
+      statement_update
+    };
+
     class binding;
     class select_statement;