1 files changed, 104 insertions, 0 deletions
diff --git a/odb/mysql/common.hxx b/odb/mysql/common.hxx
index cd4d27f..5017158 100644
--- a/odb/mysql/common.hxx
+++ b/odb/mysql/common.hxx
@@ -11,6 +11,110 @@
 
 namespace mysql
 {
+  struct member_base: traversal::data_member, context
+  {
+    member_base (context& c, bool id)
+        : context (c), id_ (id)
+    {
+    }
+
+    virtual void
+    traverse (type& m);
+
+    virtual void
+    pre (type&)
+    {
+    }
+
+    virtual void
+    post (type&)
+    {
+    }
+
+    virtual void
+    traverse_integer (type&, sql_type const&)
+    {
+    }
+
+    virtual void
+    traverse_float (type&, sql_type const&)
+    {
+    }
+
+    virtual void
+    traverse_decimal (type&, sql_type const&)
+    {
+    }
+
+    virtual void
+    traverse_date_time (type&, sql_type const&)
+    {
+    }
+
+    virtual void
+    traverse_short_string (type&, sql_type const&)
+    {
+    }
+
+    virtual void
+    traverse_long_string (type&, sql_type const&)
+    {
+    }
+
+    virtual void
+    traverse_bit (type&, sql_type const&)
+    {
+    }
+
+    virtual void
+    traverse_enum (type&, sql_type const&)
+    {
+    }
+
+    virtual void
+    traverse_set (type&, sql_type const&)
+    {
+    }
+
+  protected:
+    bool id_;
+    string var;
+  };
+
+  struct has_grow_member: member_base
+  {
+    has_grow_member (context& c)
+        : member_base (c, false), r_ (false)
+    {
+    }
+
+    bool
+    result ()
+    {
+      return r_;
+    }
+
+    virtual void
+    traverse_long_string (type&, sql_type const& t)
+    {
+      r_ = true;
+    }
+
+    virtual void
+    traverse_enum (type&, sql_type const&)
+    {
+      r_ = true;
+    }
+
+    virtual void
+    traverse_set (type&, sql_type const&)
+    {
+      r_ = true;
+    }
+
+  private:
+    bool r_;
+  };
 }
 
 #endif // ODB_MYSQL_COMMON_HXX