table_setup_consumers.h

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/* Copyright (c) 2008, 2023, Oracle and/or its affiliates.
 
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  it under the terms of the GNU General Public License, version 2.0,
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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 TABLE_SETUP_CONSUMERS_H
#define TABLE_SETUP_CONSUMERS_H
 
/**
  @file storage/perfschema/table_setup_consumers.h
  Table SETUP_CONSUMERS (declarations).
*/
 
#include <sys/types.h>
 
#include "lex_string.h"
#include "my_base.h"
#include "storage/perfschema/pfs_engine_table.h"
#include "storage/perfschema/table_helper.h"
 
class Field;
class Plugin_table;
struct TABLE;
struct THR_LOCK;
 
/**
  @addtogroup performance_schema_tables
  @{
*/
 
/** A row of PERFORMANCE_SCHEMA.SETUP_CONSUMERS. */
struct row_setup_consumers {
  /** Column NAME. */
  LEX_CSTRING m_name;
  /** Column ENABLED. */
  bool *m_enabled_ptr;
  /** Hidden column, instrument refresh. */
  bool m_instrument_refresh;
  /** Hidden column, thread refresh. */
  bool m_thread_refresh;
};
 
class PFS_index_setup_consumers : public PFS_engine_index {
 public:
  PFS_index_setup_consumers() : PFS_engine_index(&m_key), m_key("NAME") {}
 
  ~PFS_index_setup_consumers() override = default;
 
  virtual bool match(row_setup_consumers *row);
 
 private:
  PFS_key_name m_key;
};
 
/** Table PERFORMANCE_SCHEMA.SETUP_CONSUMERS. */
class table_setup_consumers : public PFS_engine_table {
 public:
  /** Table share. */
  static PFS_engine_table_share m_share;
  static PFS_engine_table *create(PFS_engine_table_share *);
  static ha_rows get_row_count();
 
  void reset_position() override;
 
  int rnd_next() override;
  int rnd_pos(const void *pos) override;
 
  int index_init(uint idx, bool sorted) override;
  int index_next() override;
 
 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 *old_buf,
                        unsigned char *new_buf, Field **fields) override;
  table_setup_consumers();
 
 public:
  ~table_setup_consumers() override = default;
 
 private:
  /** Table share lock. */
  static THR_LOCK m_table_lock;
  /** Table definition. */
  static Plugin_table m_table_def;
 
  /** Current row. */
  row_setup_consumers *m_row;
  /** Current position. */
  PFS_simple_index m_pos;
  /** Next position. */
  PFS_simple_index m_next_pos;
 
  PFS_index_setup_consumers *m_opened_index;
};
 
/** @} */
#endif