Index: sql/sql_select.cc
===================================================================
--- sql/sql_select.cc	(revision 12926)
+++ sql/sql_select.cc	(working copy)
@@ -11812,6 +11812,11 @@
   tab->read_record.record=table->record[0];
   if (!table->file->inited)
     table->file->ha_index_init(tab->index, tab->sorted);
+  if ((error = table->file->prepare_index_scan())) 
+  { 
+    report_error(table,error); 
+    return -1; 
+  } 
   if ((error=tab->table->file->index_first(tab->table->record[0])))
   {
     if (error != HA_ERR_KEY_NOT_FOUND && error != HA_ERR_END_OF_FILE)
@@ -11851,6 +11856,11 @@
   tab->read_record.record=table->record[0];
   if (!table->file->inited)
     table->file->ha_index_init(tab->index, 1);
+  if ((error = table->file->prepare_index_scan())) 
+  { 
+    report_error(table,error); 
+    return -1; 
+  } 
   if ((error= tab->table->file->index_last(tab->table->record[0])))
     return report_error(table, error);
   return 0;
Index: sql/handler.h
===================================================================
--- sql/handler.h	(revision 12926)
+++ sql/handler.h	(working copy)
@@ -1926,6 +1926,9 @@
   { return HA_ERR_WRONG_COMMAND; }
   virtual int rename_partitions(const char *path)
   { return HA_ERR_WRONG_COMMAND; }
+public: 
+  virtual int prepare_index_scan() 
+  { return 0; }  
 };