table_plugin_table.h

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/* Copyright (c) 2017, 2024, 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
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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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  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
 
#ifndef TABLE_PLUGIN_TABLE_H
#define TABLE_PLUGIN_TABLE_H
 
/**
  @file storage/perfschema/table_plugin_table.h
  plugins/components tables (declarations).
*/
 
#include <mysql/components/services/pfs_plugin_table_service.h>
 
#include "storage/perfschema/pfs_engine_table.h"
 
/**
  @addtogroup Performance_schema_tables
  @{
*/
 
class PFS_plugin_table_index;
 
class table_plugin_table : public PFS_engine_table {
 public:
  /** Table share */
  PFS_engine_table_share *m_share;
  PFS_engine_table_proxy *m_st_table;
  PSI_table_handle *plugin_table_handle;
 
  static PFS_engine_table *create(PFS_engine_table_share *share);
  int delete_all_rows();
  /*
  PFS_engine_table* open();
  ha_rows get_row_count();
  */
 
  void reset_position() override;
 
  int rnd_init(bool scan) override;
  int rnd_next() override;
  int rnd_pos(const void *pos) override;
 
  int index_init(uint idx, bool sorted) override;
  int index_next() override;
 
  int write_row(PSI_field *field, uint index, bool finished);
 
  explicit table_plugin_table(PFS_engine_table_share *share);
 
  void deinitialize_table_share();
 
 protected:
  int read_row_values(TABLE *table, unsigned char *buf, Field **fields,
                      bool read_all) override;
 
  int update_row_values(TABLE *table, const unsigned char *, unsigned char *,
                        Field **fields) override;
 
  int delete_row_values(TABLE *table, const unsigned char *buf,
                        Field **fields) override;
 
 public:
  ~table_plugin_table() override {
    delete m_index;
    m_st_table->close_table(this->plugin_table_handle);
  }
 
 private:
  /** Table share lock. */
  THR_LOCK *m_table_lock;
 
  /** True is the current row exists. */
  bool m_row_exists;
 
  /** Current position. */
  PSI_pos *m_pos;
  /** Next position. */
  PSI_pos *m_next_pos;
 
  PFS_plugin_table_index *m_opened_index;
};
 
class PFS_plugin_table_index : public PFS_engine_index_abstract {
 public:
  explicit PFS_plugin_table_index(PFS_engine_table_proxy *st_table)
      : m_st_table(st_table), m_idx(0), m_plugin_index(nullptr) {}
 
  ~PFS_plugin_table_index() override = default;
 
  int init(PSI_table_handle *table, uint idx, bool sorted);
 
  int index_next(PSI_table_handle *table);
 
  void read_key(const uchar *key, uint key_len,
                enum ha_rkey_function find_flag) override;
 
 private:
  PFS_engine_table_proxy *m_st_table;
  uint m_idx;
  PSI_index_handle *m_plugin_index;
};
 
/** @} */
#endif