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+// file : evolution/alter-column/model.hxx
+// copyright : Copyright (c) 2009-2013 Code Synthesis Tools CC
+// license : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef MODEL_VERSION
+# error model.hxx included directly
+#endif
+
+#include <string>
+
+#include <odb/core.hxx>
+#include <odb/nullable.hxx>
+
+#pragma db model version(1, MODEL_VERSION)
+
+#define MODEL_NAMESPACE_IMPL(V) v##V
+#define MODEL_NAMESPACE(V) MODEL_NAMESPACE_IMPL(V)
+
+namespace MODEL_NAMESPACE(MODEL_VERSION)
+{
+ #pragma db object
+ struct object
+ {
+ object (unsigned long id = 0): id_ (id) {}
+
+ #pragma db id
+ unsigned long id_;
+
+#if MODEL_VERSION == 2
+ odb::nullable<std::string> str;
+
+ unsigned long num;
+
+ #pragma db null
+ unsigned long dummy; // Test multiple ALTER COLUMN clauses.
+#else
+ // Use nullable to be able to access during migration.
+ //
+ #pragma db not_null
+ odb::nullable<std::string> str;
+
+ odb::nullable<unsigned long> num;
+
+ unsigned long dummy;
+#endif
+ };
+}
+
+#undef MODEL_NAMESPACE
+#undef MODEL_NAMESPACE_IMPL