diff -Naru ./mysql-5.1.35/sql/ha_partition.cc ./mysql-5.1.35-vp/sql/ha_partition.cc
--- ./mysql-5.1.35/sql/ha_partition.cc	2009-05-14 20:34:56.000000000 +0900
+++ ./mysql-5.1.35-vp/sql/ha_partition.cc	2009-07-02 00:08:34.000000000 +0900
@@ -5381,6 +5381,21 @@
     /* Currently only NDB use the *_CANNOT_BATCH */
     break;
   }
+    /* Category 9), used by marge handlers */
+  case HA_EXTRA_ATTACH_CHILDREN:
+    int result;
+    handler **file;
+    if ((result = loop_extra(operation)))
+      DBUG_RETURN(result);
+    m_no_locks = 0;
+    file = m_file;
+    do
+    {
+      m_no_locks += (*file)->lock_count();
+    } while (*(++file));
+    break;
+  case HA_EXTRA_DETACH_CHILDREN:
+    DBUG_RETURN(loop_extra(operation));
   default:
   {
     /* Temporary crash to discover what is wrong */