1 files changed, 9 insertions, 4 deletions
diff --git a/sql/sql_lex.h b/sql/sql_lex.h
index ea2ca10a444..8b8a55e0c96 100644
--- a/sql/sql_lex.h
+++ b/sql/sql_lex.h
@@ -1063,6 +1063,14 @@ public:
    converted to a GROUP BY involving BIT fields.
   */
   uint hidden_bit_fields;
+  /*
+    Number of fields used in the definition of all the windows functions.
+    This includes:
+      1) Fields in the arguments
+      2) Fields in the PARTITION BY clause
+      3) Fields in the ORDER BY clause
+  */
+  uint fields_in_window_functions;
   enum_parsing_place parsing_place; /* where we are parsing expression */
   enum_parsing_place context_analysis_place; /* where we are in prepare */
   bool with_sum_func;   /* sum function indicator */
@@ -1385,10 +1393,7 @@ public:
                        SQL_I_List<ORDER> win_order_list,
                        Window_frame *win_frame);
   List<Item_window_func> window_funcs;
-  bool add_window_func(Item_window_func *win_func)
-  {
-    return window_funcs.push_back(win_func);
-  }
+  bool add_window_func(Item_window_func *win_func);
 
   bool have_window_funcs() const { return (window_funcs.elements !=0); }
   ORDER *find_common_window_func_partition_fields(THD *thd);