table_tiws_by_index_usage.h

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  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
 
#ifndef TABLE_IO_WAIT_SUMMARY_BY_INDEX_USAGE_H
#define TABLE_IO_WAIT_SUMMARY_BY_INDEX_USAGE_H
 
/**
  @file storage/perfschema/table_tiws_by_index_usage.h
  Table TABLE_IO_WAIT_SUMMARY_BY_INDEX_USAGE (declarations).
*/
 
#include <sys/types.h>
 
#include "my_base.h"
#include "storage/perfschema/pfs_engine_table.h"
#include "storage/perfschema/table_helper.h"
 
class Field;
class Plugin_table;
struct PFS_table_share;
struct TABLE;
struct THR_LOCK;
 
/**
  @addtogroup performance_schema_tables
  @{
*/
 
/**
  A row of table
  PERFORMANCE_SCHEMA.TABLE_IO_WAIT_SUMMARY_BY_INDEX.
*/
struct row_tiws_by_index_usage {
  /** Column OBJECT_TYPE, SCHEMA_NAME, OBJECT_NAME, INDEX_NAME. */
  PFS_index_row m_index;
  /** Columns COUNT/SUM/MIN/AVG/MAX (+_READ, +WRITE). */
  PFS_table_io_stat_row m_stat;
};
 
/**
  Position of a cursor on
  PERFORMANCE_SCHEMA.TABLE_IO_WAIT_SUMMARY_BY_INDEX.
  Index 1 on global_table_share_container (0 based)
  Index 2 on index (0 based)
*/
struct pos_tiws_by_index_usage : public PFS_double_index {
  pos_tiws_by_index_usage() : PFS_double_index(0, 0) {}
 
  inline void reset() {
    m_index_1 = 0;
    m_index_2 = 0;
  }
 
  inline void next_table() {
    m_index_1++;
    m_index_2 = 0;
  }
};
 
class PFS_index_tiws_by_index_usage : public PFS_engine_index {
 public:
  PFS_index_tiws_by_index_usage()
      : PFS_engine_index(&m_key_1, &m_key_2, &m_key_3, &m_key_4),
        m_key_1("OBJECT_TYPE"),
        m_key_2("OBJECT_SCHEMA"),
        m_key_3("OBJECT_NAME"),
        m_key_4("INDEX_NAME") {}
 
  ~PFS_index_tiws_by_index_usage() override = default;
 
  virtual bool match(PFS_table_share *pfs);
  virtual bool match(PFS_table_share *share, uint index);
 
 private:
  PFS_key_object_type m_key_1;
  PFS_key_object_schema m_key_2;
  PFS_key_object_name m_key_3;
  PFS_key_object_name m_key_4; /* index name */
};
 
/** Table PERFORMANCE_SCHEMA.TABLE_IO_WAIT_SUMMARY_BY_INDEX. */
class table_tiws_by_index_usage : 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() 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_tiws_by_index_usage();
 
 public:
  ~table_tiws_by_index_usage() override = default;
 
 protected:
  int make_row(PFS_table_share *pfs_share, uint index);
 
 private:
  /** Table share lock. */
  static THR_LOCK m_table_lock;
  /** Table definition. */
  static Plugin_table m_table_def;
 
  /** Current row. */
  row_tiws_by_index_usage m_row;
  /** Current position. */
  pos_tiws_by_index_usage m_pos;
  /** Next position. */
  pos_tiws_by_index_usage m_next_pos;
 
 protected:
  PFS_index_tiws_by_index_usage *m_opened_index;
};
 
/** @} */
#endif