table_esms_by_digest.h

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#ifndef TABLE_ESMS_BY_DIGEST_H
#define TABLE_ESMS_BY_DIGEST_H
 
/**
  @file storage/perfschema/table_esms_by_digest.h
  Table EVENTS_STATEMENTS_SUMMARY_BY_DIGEST (declarations).
*/
 
#include <sys/types.h>
 
#include "my_inttypes.h"
#include "storage/perfschema/pfs_digest.h"
#include "storage/perfschema/table_helper.h"
 
/**
  @addtogroup performance_schema_tables
  @{
*/
 
class PFS_index_esms_by_digest : public PFS_engine_index {
 public:
  PFS_index_esms_by_digest()
      : PFS_engine_index(&m_key_1, &m_key_2),
        m_key_1("SCHEMA_NAME"),
        m_key_2("DIGEST") {}
 
  ~PFS_index_esms_by_digest() override = default;
 
  virtual bool match(PFS_statements_digest_stat *pfs);
 
 private:
  PFS_key_schema m_key_1;
  PFS_key_digest m_key_2;
};
 
/**
  A row of table
  PERFORMANCE_SCHEMA.EVENTS_STATEMENTS_SUMMARY_BY_DIGEST.
*/
struct row_esms_by_digest {
  /** Columns DIGEST/DIGEST_TEXT. */
  PFS_digest_row m_digest;
 
  /** Columns COUNT_STAR, SUM/MIN/AVG/MAX TIMER_WAIT. */
  PFS_statement_stat_row m_stat;
 
  /** Column FIRST_SEEN. */
  ulonglong m_first_seen;
  /** Column LAST_SEEN. */
  ulonglong m_last_seen;
 
  /** Column QUANTILE_95. */
  ulonglong m_p95;
  /** Column QUANTILE_99. */
  ulonglong m_p99;
  /** Column QUANTILE_999. */
  ulonglong m_p999;
 
  /** Column QUERY_SAMPLE_TEXT. */
  String m_query_sample;
  /** Column QUERY_SAMPLE_SEEN. */
  ulonglong m_query_sample_seen;
  /** Column QUERY_SAMPLE_TIMER_WAIT. */
  ulonglong m_query_sample_timer_wait;
};
 
/** Table PERFORMANCE_SCHEMA.EVENTS_STATEMENTS_SUMMARY_BY_DIGEST. */
class table_esms_by_digest : 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_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_esms_by_digest();
 
 public:
  ~table_esms_by_digest() override = default;
 
 protected:
  int make_row(PFS_statements_digest_stat *);
 
 private:
  /** Table share lock. */
  static THR_LOCK m_table_lock;
  /** Table definition. */
  static Plugin_table m_table_def;
 
  /** Current row. */
  row_esms_by_digest m_row;
  /** Current position. */
  PFS_simple_index m_pos;
  /** Next position. */
  PFS_simple_index m_next_pos;
 
  PFS_index_esms_by_digest *m_opened_index;
};
 
/** @} */
#endif