parse_tree_window.h

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/* Copyright (c) 2020, 2022, Oracle and/or its affiliates.
 
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
 
#ifndef SQL_PARSE_TREE_WINDOW_INCLUDED
#define SQL_PARSE_TREE_WINDOW_INCLUDED
 
#include "sql/parse_tree_node_base.h"
#include "sql/sql_list.h"
#include "sql/window.h"
 
class Item_string;
class PT_frame;
class PT_order_list;
 
/**
  Parse tree node for a window; just a shallow wrapper for
  class Window, q.v.
*/
class PT_window : public Parse_tree_node, public Window {
  typedef Parse_tree_node super;
 
 public:
  PT_window(PT_order_list *partition_by, PT_order_list *order_by,
            PT_frame *frame)
      : Window(partition_by, order_by, frame) {}
 
  PT_window(PT_order_list *partition_by, PT_order_list *order_by,
            PT_frame *frame, Item_string *inherit)
      : Window(partition_by, order_by, frame, inherit) {}
 
  PT_window(Item_string *name) : Window(name) {}
 
  bool contextualize(Parse_context *pc) override;
};
 
/**
  Parse tree node for a list of window definitions corresponding
  to a <window clause> in SQL 2003.
*/
class PT_window_list : public Parse_tree_node {
  typedef Parse_tree_node super;
  List<Window> m_windows;
 
 public:
  PT_window_list() = default;
 
  bool contextualize(Parse_context *pc) override;
 
  bool push_back(PT_window *w) { return m_windows.push_back(w); }
};
 
#endif  // SQL_PARSE_TREE_WINDOW_INCLUDED