Merge for Item_equal.

BitKeeper/etc/ignore:
  auto-union
mysql-test/r/bdb.result:
  Auto merged
mysql-test/r/func_group.result:
  Auto merged
mysql-test/r/innodb.result:
  Auto merged
mysql-test/r/heap_btree.result:
  Auto merged
mysql-test/r/select.result:
  Auto merged
mysql-test/r/user_var.result:
  Auto merged
mysql-test/t/range.test:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/item_func.h:
  Auto merged
sql/item_row.cc:
  Auto merged
sql/item_strfunc.h:
  Auto merged
sql/opt_sum.cc:
  Auto merged
sql/sql_list.h:
  Auto merged
mysql-test/r/func_test.result:
  Post-automerge resolution of conflicts
mysql-test/r/index_merge.result:
  Post-automerge resolution of conflicts
mysql-test/r/join_outer.result:
  Post-automerge resolution of conflicts
mysql-test/r/range.result:
  Post-automerge resolution of conflicts
mysql-test/r/subselect.result:
  Post-automerge resolution of conflicts
sql/item.cc:
  Post-automerge resolution of conflicts
sql/item.h:
  Post-automerge resolution of conflicts
sql/item_cmpfunc.cc:
  Post-automerge resolution of conflicts
sql/item_cmpfunc.h:
  Post-automerge resolution of conflicts
sql/opt_range.cc:
  Post-automerge resolution of conflicts
sql/sql_select.cc:
  Post-automerge resolution of conflicts
sql/sql_select.h:
  Post-automerge resolution of conflicts

1 files changed, 15 insertions, 0 deletions

diff --git a/sql/opt_sum.cc b/sql/opt_sum.cc
index 314decb7041..a47f7eb4278 100644
--- a/sql/opt_sum.cc
+++ b/sql/opt_sum.cc
@@ -341,6 +341,18 @@ static bool simple_pred(Item_func *func_item, Item **args, bool *inv_order)
   Item *item;
   *inv_order= 0;
   switch (func_item->argument_count()) {
+  case 0:
+    /* MULT_EQUAL_FUNC */
+    {
+      Item_equal *item_equal= (Item_equal *) func_item;
+      Item_equal_iterator it(*item_equal);
+      args[0]= it++;
+      if (it++)
+        return 0;
+      if (!(args[1]= item_equal->get_const()))
+        return 0;
+    }
+    break;
   case 1:
     /* field IS NULL */
     item= func_item->arguments()[0];
@@ -481,6 +493,9 @@ static bool matching_cond(bool max_fl, TABLE_REF *ref, KEY *keyinfo,
   case Item_func::BETWEEN:
     between= 1;
     break;
+  case Item_func::MULT_EQUAL_FUNC:
+    eq_type= 1;
+    break;
   default:
     return 0;                                        // Can't optimize function
   }