index_element_impl.h

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/* Copyright (c) 2014, 2023, Oracle and/or its affiliates.
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.
 
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   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
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   This program is distributed in the hope that it will be useful,
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License, version 2.0, for more details.
 
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   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
 
#ifndef DD__INDEX_ELEMENT_IMPL_INCLUDED
#define DD__INDEX_ELEMENT_IMPL_INCLUDED
 
#include <stddef.h>
#include <sys/types.h>
#include <new>
 
#include "sql/dd/impl/types/index_impl.h"        // dd::Index_impl
#include "sql/dd/impl/types/weak_object_impl.h"  // dd::Weak_object_impl
#include "sql/dd/sdi_fwd.h"
#include "sql/dd/string_type.h"
#include "sql/dd/types/index_element.h"  // dd::Index_element
 
namespace dd {
 
///////////////////////////////////////////////////////////////////////////
 
class Column;
class Index;
class Object_key;
class Object_table;
class Open_dictionary_tables_ctx;
class Raw_record;
class Sdi_rcontext;
class Sdi_wcontext;
class Weak_object;
 
///////////////////////////////////////////////////////////////////////////
 
class Index_element_impl : public Weak_object_impl, public Index_element {
 public:
  Index_element_impl()
      : m_ordinal_position(0),
        m_length(-1),
        m_order(Index_element::ORDER_ASC),
        m_hidden(false),
        m_index(nullptr),
        m_column(nullptr) {}
 
  Index_element_impl(Index_impl *index, Column *column)
      : m_ordinal_position(0),
        m_length(-1),
        m_order(Index_element::ORDER_ASC),
        m_hidden(false),
        m_index(index),
        m_column(column) {}
 
  Index_element_impl(const Index_element_impl &src, Index_impl *parent,
                     Column *column);
 
  ~Index_element_impl() override = default;
 
 public:
  const Object_table &object_table() const override;
 
  bool validate() const override;
 
  bool store_attributes(Raw_record *r) override;
 
  bool restore_attributes(const Raw_record &r) override;
 
  void serialize(Sdi_wcontext *wctx, Sdi_writer *w) const override;
 
  bool deserialize(Sdi_rcontext *rctx, const RJ_Value &val) override;
 
  void set_ordinal_position(uint ordinal_position) {
    m_ordinal_position = ordinal_position;
  }
 
 public:
  static void register_tables(Open_dictionary_tables_ctx *otx);
 
  /////////////////////////////////////////////////////////////////////////
  // index.
  /////////////////////////////////////////////////////////////////////////
 
  const Index &index() const override { return *m_index; }
 
  Index &index() override { return *m_index; }
 
  /////////////////////////////////////////////////////////////////////////
  // column.
  /////////////////////////////////////////////////////////////////////////
 
  const Column &column() const override { return *m_column; }
 
  Column &column() override { return *m_column; }
 
  /////////////////////////////////////////////////////////////////////////
  // ordinal_position.
  /////////////////////////////////////////////////////////////////////////
 
  uint ordinal_position() const override { return m_ordinal_position; }
 
  /////////////////////////////////////////////////////////////////////////
  // length.
  /////////////////////////////////////////////////////////////////////////
 
  uint length() const override { return m_length; }
 
  void set_length(uint length) override { m_length = length; }
 
  void set_length_null(bool) override { m_length = (uint)-1; }
 
  bool is_length_null() const override { return m_length == (uint)-1; }
 
  /////////////////////////////////////////////////////////////////////////
  // is_hidden.
  /////////////////////////////////////////////////////////////////////////
 
  bool is_hidden() const override { return m_hidden; }
 
  void set_hidden(bool hidden) override { m_hidden = hidden; }
 
  /////////////////////////////////////////////////////////////////////////
  // order.
  /////////////////////////////////////////////////////////////////////////
 
  enum_index_element_order order() const override { return m_order; }
 
  void set_order(enum_index_element_order order) override { m_order = order; }
 
  bool is_prefix() const override;
 
 public:
  static Index_element_impl *restore_item(Index_impl *index) {
    return new (std::nothrow) Index_element_impl(index, nullptr);
  }
 
  static Index_element_impl *clone(const Index_element_impl &other,
                                   Index_impl *index);
 
 public:
  void debug_print(String_type &outb) const override;
 
 public:
  Object_key *create_primary_key() const override;
  bool has_new_primary_key() const override;
 
 private:
  // Fields
  uint m_ordinal_position;
  uint m_length;
 
  enum_index_element_order m_order;
 
  bool m_hidden;
 
  // References to other objects
  Index_impl *m_index;
  Column *m_column;
};
 
///////////////////////////////////////////////////////////////////////////
 
}  // namespace dd
 
#endif  // DD__INDEX_ELEMENT_IMPL_INCLUDED