1 files changed, 6 insertions, 1 deletions
diff --git a/sql/ha_heap.h b/sql/ha_heap.h
index 68406202c76..ffe448a6b6c 100644
--- a/sql/ha_heap.h
+++ b/sql/ha_heap.h
@@ -93,5 +93,10 @@ class ha_heap: public handler
 
   THR_LOCK_DATA **store_lock(THD *thd, THR_LOCK_DATA **to,
 			     enum thr_lock_type lock_type);
-
+  int cmp_ref(const byte *ref1, const byte *ref2)
+  {
+    HEAP_PTR ptr1=*(HEAP_PTR*)ref1;
+    HEAP_PTR ptr2=*(HEAP_PTR*)ref2;
+    return ptr1 < ptr2? -1 : (ptr1 > ptr2? 1 : 0);
+  }
 };