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diff --git a/odb-tests/common/id/nested/test.hxx b/odb-tests/common/id/nested/test.hxx
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+++ b/odb-tests/common/id/nested/test.hxx
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+// file      : common/id/nested/test.hxx
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef TEST_HXX
+#define TEST_HXX
+
+#include <string>
+#include <vector>
+
+#include <odb/core.hxx>
+#include <odb/vector.hxx>
+
+// Simple nested id.
+//
+#pragma db namespace table("t1_")
+namespace test1
+{
+  #pragma db value
+  struct comp
+  {
+    int x;
+    std::string y;
+  };
+
+  #pragma db object
+  struct object
+  {
+    #pragma db id(y)
+    comp id;
+
+    int z;
+    std::vector<int> v;
+
+    object () {}
+    object (int x, std::string y, int z_): z (z_) {id.x = x; id.y = y;}
+  };
+
+  inline bool
+  operator== (object a, object b)
+  {
+    return a.id.x == b.id.x && a.id.y == b.id.y && a.z == b.z && a.v == b.v;
+  }
+
+  #pragma db object
+  struct object1
+  {
+    #pragma db id auto
+    int id;
+
+    object* p;
+
+    object1 (object* p_ = 0): p (p_) {}
+    ~object1 () {delete p;}
+  };
+
+  inline bool
+  operator== (const object1& a, const object1& b)
+  {
+    return a.id == b.id && *a.p == *b.p;
+  }
+}
+
+// Composite nested id.
+//
+#pragma db namespace table("t2_")
+namespace test2
+{
+  #pragma db value
+  struct comp1
+  {
+    int x;
+    int y;
+  };
+
+  #pragma db value
+  struct comp2
+  {
+    comp1 c;
+    std::string s;
+  };
+
+  #pragma db object
+  struct object
+  {
+    #pragma db id(c)
+    comp2 id;
+
+    int z;
+    odb::vector<int> v;
+
+    object () {}
+    object (int x, int y, std::string s, int z_)
+        : z (z_) {id.c.x = x; id.c.y = y; id.s = s;}
+  };
+
+  inline bool
+  operator== (object a, object b)
+  {
+    return a.id.c.x == b.id.c.x && a.id.c.y == b.id.c.y &&
+      a.id.s == b.id.s && a.z == b.z && a.v == b.v;
+  }
+
+  #pragma db object
+  struct object1
+  {
+    #pragma db id auto
+    int id;
+
+    object* p;
+
+    object1 (object* p_ = 0): p (p_) {}
+    ~object1 () {delete p;}
+  };
+
+  inline bool
+  operator== (const object1& a, const object1& b)
+  {
+    return a.id == b.id && *a.p == *b.p;
+  }
+
+  // Multiple levels of nesting, just a compile test.
+  //
+  #pragma db object
+  struct object2
+  {
+    #pragma db id(c.x)
+    comp2 id;
+
+    int z;
+  };
+}
+
+// Custom/by-value access.
+//
+#pragma db namespace table("t3_")
+namespace test3
+{
+  #pragma db value
+  struct comp
+  {
+    int x;
+
+    std::string get_y () const {return y;}
+    void set_y (std::string v) {y = v;}
+
+    #pragma db get(get_y) set(set_y)
+    std::string y;
+  };
+
+  #pragma db object
+  struct object
+  {
+    comp get_id () const {return id;}
+    void set_id (comp v) {id = v;}
+
+    #pragma db id(y) get(get_id) set(set_id)
+    comp id;
+
+    int z;
+
+    object () {}
+    object (int x, std::string y, int z_): z (z_) {id.x = x; id.y = y;}
+  };
+
+  inline bool
+  operator== (object a, object b)
+  {
+    return a.id.x == b.id.x && a.id.y == b.id.y && a.z == b.z;
+  }
+}
+
+// Polymorphic.
+//
+#pragma db namespace table("t4_")
+namespace test4
+{
+  #pragma db value
+  struct comp
+  {
+    int x;
+    std::string y;
+  };
+
+  #pragma db object polymorphic
+  struct base
+  {
+    #pragma db id(y)
+    comp id;
+
+    virtual ~base () {}
+    base () {}
+    base (int x, std::string y) {id.x = x; id.y = y;}
+  };
+
+  inline bool
+  operator== (const base& a, const base& b)
+  {
+    return a.id.x == b.id.x && a.id.y == b.id.y;
+  }
+
+  #pragma db object
+  struct object: base
+  {
+    int z;
+
+    object () {}
+    object (int x, std::string y, int z_): base (x, y), z (z_) {}
+  };
+
+  inline bool
+  operator== (const object& a, const object& b)
+  {
+    return a.id.x == b.id.x && a.id.y == b.id.y && a.z == b.z;
+  }
+}
+
+#endif // TEST_HXX