Better comments

sql/sql_delete.cc

@@ -245,8 +245,6 @@ bool mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds,
   table->map=1;
   query_plan.select_lex= &thd->lex->select_lex;
   query_plan.table= table;
-
-  //psergey-todo: Ugly, discuss with Sanja
   query_plan.updating_a_view= test(table_list->view);
 
   if (mysql_prepare_delete(thd, table_list, select_lex->with_wild,

sql/sql_lex.h

@@ -2382,6 +2382,13 @@ protected:
   bool impossible_where;
   bool no_partitions;
 public:
+  /*
+    When single-table UPDATE updates a VIEW, that VIEW's select is still
+    listed as the first child.  When we print EXPLAIN, it looks like a
+    subquery.
+    In order to get rid of it, updating_a_view=TRUE means that first child
+    select should not be shown when printing EXPLAIN.
+  */
   bool updating_a_view;
 
   TABLE *table;

sql/sql_update.cc

@@ -314,8 +314,6 @@ int mysql_update(THD *thd,
     my_error(ER_NON_UPDATABLE_TABLE, MYF(0), table_list->alias, "UPDATE");
     DBUG_RETURN(1);
   }
-  
-  //psergey-todo: Ugly, discuss with Sanja
   query_plan.updating_a_view= test(table_list->view);
   
   /* Calculate "table->covering_keys" based on the WHERE */