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diff --git a/libodb-oracle/odb/oracle/auto-descriptor.hxx b/libodb-oracle/odb/oracle/auto-descriptor.hxx
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+++ b/libodb-oracle/odb/oracle/auto-descriptor.hxx
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+// file      : odb/oracle/auto-descriptor.hxx
+// license   : ODB NCUEL; see accompanying LICENSE file
+
+#ifndef ODB_ORACLE_AUTO_DESCRIPTOR_HXX
+#define ODB_ORACLE_AUTO_DESCRIPTOR_HXX
+
+#include <odb/pre.hxx>
+
+#include <odb/oracle/version.hxx>
+#include <odb/oracle/oracle-fwd.hxx>
+
+#include <odb/oracle/details/export.hxx>
+
+namespace odb
+{
+  namespace oracle
+  {
+    enum descriptor_type
+    {
+      dt_param,
+      dt_lob,
+      dt_timestamp,
+      dt_interval_ym,
+      dt_interval_ds,
+      dt_default
+    };
+
+    LIBODB_ORACLE_EXPORT void
+    oci_descriptor_free (void* descriptor, descriptor_type type);
+
+    //
+    // descriptor_type_traits
+    //
+
+    template <typename D>
+    struct default_descriptor_type_traits;
+
+    template <>
+    struct default_descriptor_type_traits<OCIParam>
+    { static const descriptor_type dtype = dt_param; };
+
+    template <>
+    struct default_descriptor_type_traits<OCILobLocator>
+    { static const descriptor_type dtype = dt_lob; };
+
+    //
+    // auto_descriptor_base
+    //
+
+    template <typename D, descriptor_type type>
+    struct auto_descriptor_base
+    {
+      static void
+      release (D* d)
+      {
+        oci_descriptor_free (d, type);
+      }
+    };
+
+    template <typename D>
+    struct auto_descriptor_base<D, dt_default>
+    {
+      static void
+      release (D* d)
+      {
+        oci_descriptor_free (d, default_descriptor_type_traits<D>::dtype);
+      }
+    };
+
+    //
+    // auto_descriptor
+    //
+
+    template <typename D, descriptor_type type = dt_default>
+    class auto_descriptor: auto_descriptor_base<D, type>
+    {
+    public:
+      auto_descriptor (D* d = 0)
+          : d_ (d)
+      {
+      }
+
+      ~auto_descriptor ()
+      {
+        if (d_ != 0)
+          this->release (d_);
+      }
+
+      operator D* () const
+      {
+        return d_;
+      }
+
+      D*&
+      get ()
+      {
+        return d_;
+      }
+
+      D*
+      get () const
+      {
+        return d_;
+      }
+
+      void
+      reset (D* d = 0)
+      {
+        if (d_ != 0)
+          this->release (d_);
+
+        d_ = d;
+      }
+
+    private:
+      auto_descriptor (const auto_descriptor&);
+      auto_descriptor& operator= (const auto_descriptor&);
+
+    protected:
+      D* d_;
+    };
+  }
+}
+
+#include <odb/post.hxx>
+
+#endif // ODB_ORACLE_AUTO_DESCRIPTOR_HXX