From 255473612bbf9e753fa83fd7ccfd6e498175f83a Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Wed, 31 Oct 2012 07:59:17 +0200
Subject: Add dynamic multi-database support excluding query

---
 odb/forward.hxx        |  5 +++--
 odb/function-table.hxx | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+), 2 deletions(-)
 create mode 100644 odb/function-table.hxx

diff --git a/odb/forward.hxx b/odb/forward.hxx
index 653bdbb..18e0340 100644
--- a/odb/forward.hxx
+++ b/odb/forward.hxx
@@ -45,7 +45,7 @@ namespace odb
   //
 
   // Keep real databases first since their enumerators are used as array
-  // indexes
+  // indexes.
   //
   enum database_id
   {
@@ -57,7 +57,8 @@ namespace odb
     id_default
   };
 
-  // Number of real databases in the database_id enum.
+  // Number of real databases (i.e., excluding default) in the database_id
+  // enum.
   //
   const std::size_t database_count = id_default;
 
diff --git a/odb/function-table.hxx b/odb/function-table.hxx
new file mode 100644
index 0000000..b1e5987
--- /dev/null
+++ b/odb/function-table.hxx
@@ -0,0 +1,34 @@
+// file      : odb/function-table.hxx
+// copyright : Copyright (c) 2009-2012 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef ODB_FUNCTION_TABLE_HXX
+#define ODB_FUNCTION_TABLE_HXX
+
+#include <odb/pre.hxx>
+
+#include <odb/forward.hxx>
+
+namespace odb
+{
+  template <typename T, database_id DB>
+  struct function_table_entry
+  {
+    typedef access::object_traits_impl<T, id_default> default_traits;
+
+    function_table_entry (
+      const typename default_traits::function_table_type* t)
+    {
+      default_traits::function_table[DB] = t;
+    }
+
+    ~function_table_entry ()
+    {
+      default_traits::function_table[DB] = 0;
+    }
+  };
+}
+
+#include <odb/post.hxx>
+
+#endif // ODB_FUNCTION_TABLE_HXX
-- 
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