rpl_info_table_access.h

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/* Copyright (c) 2010, 2025, 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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   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License, version 2.0, for more details.
 
   You should have received a copy of the GNU General Public License
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#ifndef RPL_INFO_TABLE_ACCESS_H
#define RPL_INFO_TABLE_ACCESS_H
 
#include <sys/types.h>
 
#include "sql/rpl_table_access.h"  // System_table_access
 
class Field;
class Open_tables_backup;
class Rpl_info_values;
class THD;
struct TABLE;
 
enum enum_return_id { FOUND_ID = 1, NOT_FOUND_ID, ERROR_ID };
 
class Rpl_info_table_access : public System_table_access {
 public:
  Rpl_info_table_access() : thd_created(false) {}
  ~Rpl_info_table_access() override = default;
 
  /**
    Prepares before opening table.
    - set flags
    - start lex and reset the part of THD responsible
      for the state of command processing if needed.
 
    @param[in]  thd  Thread requesting to open the table
  */
  void before_open(THD *thd) override;
  bool close_table(THD *thd, TABLE *table, Open_tables_backup *backup,
                   bool error);
  enum enum_return_id find_info(Rpl_info_values *field_values, TABLE *table);
  enum enum_return_id scan_info(TABLE *table, uint instance);
  std::pair<bool, bool> is_table_in_use(TABLE *table);
  bool count_info(TABLE *table, ulonglong *counter);
  bool load_info_values(uint max_num_field, Field **fields,
                        Rpl_info_values *field_values);
  bool store_info_values(uint max_num_field, Field **fields,
                         Rpl_info_values *field_values);
  THD *create_thd();
  void drop_thd(THD *thd);
 
 private:
  bool thd_created;
 
  Rpl_info_table_access &operator=(const Rpl_info_table_access &info);
  Rpl_info_table_access(const Rpl_info_table_access &info);
};
#endif /* RPL_INFO_TABLE_ACCESS_H */