table_ees_by_host_by_error.h

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/* Copyright (c) 2016, 2022, 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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  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_EES_BY_HOST_BY_ERROR_H
#define TABLE_EES_BY_HOST_BY_ERROR_H
 
/**
  @file storage/perfschema/table_ees_by_host_by_error.h
  Table EVENTS_ERRORS_SUMMARY_BY_HOST_BY_ERROR (declarations).
*/
 
#include <sys/types.h>
 
#include "my_base.h"
#include "storage/perfschema/pfs_engine_table.h"
#include "storage/perfschema/pfs_error.h"
#include "storage/perfschema/table_helper.h"
 
class Field;
class Plugin_table;
struct PFS_host;
struct TABLE;
struct THR_LOCK;
 
/**
  @addtogroup Performance_schema_tables
  @{
*/
 
class PFS_index_ees_by_host_by_error : public PFS_engine_index {
 public:
  PFS_index_ees_by_host_by_error()
      : PFS_engine_index(&m_key_1, &m_key_2),
        m_key_1("HOST"),
        m_key_2("ERROR_NUMBER") {}
 
  ~PFS_index_ees_by_host_by_error() override = default;
 
  virtual bool match(PFS_host *pfs);
  virtual bool match_error_index(uint error_index);
 
 private:
  PFS_key_host m_key_1;
  PFS_key_error_number m_key_2;
};
 
/**
  A row of table
  PERFORMANCE_SCHEMA.EVENTS_ERRORS_SUMMARY_BY_HOST_BY_ERROR.
*/
struct row_ees_by_host_by_error {
  /** Column HOST */
  PFS_host_row m_host;
  /** Columns ERROR_NUMBER, ERROR_NAME, COUNT_STAR. */
  PFS_error_stat_row m_stat;
};
 
/**
  Position of a cursor on
  PERFORMANCE_SCHEMA.EVENTS_ERRORS_SUMMARY_BY_HOST_BY_ERROR.
  Index 1 on host (0 based)
  Index 2 on error (0 based)
*/
struct pos_ees_by_host_by_error : public PFS_double_index {
  pos_ees_by_host_by_error() : PFS_double_index(0, 0) {}
 
  inline void reset(void) {
    m_index_1 = 0;
    m_index_2 = 0;
  }
 
  inline void next_host(void) {
    m_index_1++;
    m_index_2 = 0;
  }
 
  inline bool has_more_error(void) {
    return (m_index_2 < max_session_server_errors);
  }
 
  inline void next_error(void) { m_index_2++; }
};
 
/** Table PERFORMANCE_SCHEMA.EVENTS_ERRORS_SUMMARY_BY_HOST_BY_ERROR. */
class table_ees_by_host_by_error : public PFS_engine_table {
 public:
  /** Table share */
  static PFS_engine_table_share m_share;
  static PFS_engine_table *create(PFS_engine_table_share *);
  static int delete_all_rows();
  static ha_rows get_row_count();
 
  void reset_position(void) 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;
 
 protected:
  int read_row_values(TABLE *table, unsigned char *buf, Field **fields,
                      bool read_all) override;
 
  table_ees_by_host_by_error();
 
 public:
  ~table_ees_by_host_by_error() override = default;
 
 protected:
  int make_row(PFS_host *host, int error_index);
 
 private:
  /** Table share lock. */
  static THR_LOCK m_table_lock;
  /** Table definition. */
  static Plugin_table m_table_def;
 
  /** Current row. */
  row_ees_by_host_by_error m_row;
  /** Current position. */
  pos_ees_by_host_by_error m_pos;
  /** Next position. */
  pos_ees_by_host_by_error m_next_pos;
 
  PFS_index_ees_by_host_by_error *m_opened_index;
};
 
/** @} */
#endif