cursor_by_thread_connect_attr.h

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/* Copyright (c) 2012, 2022, 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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  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
 
#ifndef CURSOR_BY_THREAD_CONNECT_ATTR_H
#define CURSOR_BY_THREAD_CONNECT_ATTR_H
 
/**
  @file storage/perfschema/cursor_by_thread_connect_attr.h
*/
 
#include <sys/types.h>
 
#include "storage/perfschema/pfs_column_types.h"
#include "storage/perfschema/pfs_engine_table.h"
#include "storage/perfschema/pfs_instr.h"
 
/**
  @addtogroup performance_schema_tables
  @{
*/
 
/**
  Position of a cursor on abstract table
  PERFORMANCE_SCHEMA.SESSION_CONNECT_ATTRS.
*/
struct pos_connect_attr_by_thread_by_attr : public PFS_double_index {
  pos_connect_attr_by_thread_by_attr() : PFS_double_index(0, 0) {}
 
  inline void next_thread(void) {
    m_index_1++;
    m_index_2 = 0;
  }
 
  inline void reset(void) {
    m_index_1 = 0;
    m_index_2 = 0;
  }
};
 
/** Cursor CURSOR_BY_THREAD_CONNECT_ATTR. */
class cursor_by_thread_connect_attr : public PFS_engine_table {
 public:
  static ha_rows get_row_count();
 
  void reset_position(void) override;
 
  int rnd_next() override;
  int rnd_pos(const void *pos) override;
 
  int index_init(uint, bool) override { return 1; }
  int index_next() override { return 1; }
 
 protected:
  explicit cursor_by_thread_connect_attr(const PFS_engine_table_share *share);
 
 public:
  ~cursor_by_thread_connect_attr() override = default;
 
 protected:
  virtual int make_row(PFS_thread *thread, uint ordinal) = 0;
 
  /** Current position. */
  pos_connect_attr_by_thread_by_attr m_pos;
  /** Next position. */
  pos_connect_attr_by_thread_by_attr m_next_pos;
};
 
/** @} */
#endif