Merge with 4.1 to get bug fix

mysql-test/r/group_by.result:
  Auto merged
mysql-test/r/user_var.result:
  Auto merged
sql/item_row.cc:
  Auto merged
sql/item_strfunc.cc:
  Auto merged
sql/unireg.h:
  Auto merged
sql/item_cmpfunc.cc:
  manual merge
sql/item_func.cc:
  no changes

1 files changed, 8 insertions, 3 deletions

diff --git a/sql/item_row.cc b/sql/item_row.cc
index 62f31186b09..a5a430785d6 100644
--- a/sql/item_row.cc
+++ b/sql/item_row.cc
@@ -84,15 +84,20 @@ bool Item_row::fix_fields(THD *thd, TABLE_LIST *tabl, Item **ref)
   return FALSE;
 }
 
+
 void Item_row::split_sum_func(THD *thd, Item **ref_pointer_array,
                               List<Item> &fields)
 {
   Item **arg, **arg_end;
   for (arg= items, arg_end= items+arg_count; arg != arg_end ; arg++)
   {
-    if ((*arg)->with_sum_func && (*arg)->type() != SUM_FUNC_ITEM)
-      (*arg)->split_sum_func(thd, ref_pointer_array, fields);
-    else if ((*arg)->used_tables() || (*arg)->type() == SUM_FUNC_ITEM)
+    Item *item= *arg;
+    if (item->type() != SUM_FUNC_ITEM &&
+        (item->with_sum_func ||
+         (item->used_tables() & PSEUDO_TABLE_BITS)))
+      item->split_sum_func(thd, ref_pointer_array, fields);
+    else if (item->type() == SUM_FUNC_ITEM ||
+             (item->used_tables() && item->type() != REF_ITEM))
     {
       uint el= fields.elements;
       ref_pointer_array[el]=*arg;