MySQL 8.0.31
Source Code Documentation
table_performance_timers.h
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22
23#ifndef TABLE_PERFORMANCE_TIMERS_H
24#define TABLE_PERFORMANCE_TIMERS_H
25
26/**
27 @file storage/perfschema/table_performance_timers.h
28 Table PERFORMANCE_TIMERS (declarations).
29*/
30
31#include "my_base.h"
32#include "my_rdtsc.h"
35
36class Field;
37class Plugin_table;
38struct TABLE;
39struct THR_LOCK;
40
41/**
42 @addtogroup performance_schema_tables
43 @{
44*/
45
46/** A row of PERFORMANCE_SCHEMA.PERFORMANCE_TIMERS. */
48 /** Column TIMER_NAME. */
50 /**
51 Columns ROUTINE (not displayed), TIMER_OVERHEAD,
52 TIMER_FREQUENCY, TIMER_RESOLUTION.
53 */
55};
56
57/** Table PERFORMANCE_SCHEMA.PERFORMANCE_TIMERS. */
59 public:
60 /** Table share. */
63 static ha_rows get_row_count();
64
65 int rnd_next() override;
66 int rnd_pos(const void *pos) override;
67 void reset_position(void) override;
68
69 protected:
70 int read_row_values(TABLE *table, unsigned char *buf, Field **fields,
71 bool read_all) override;
72
73 protected:
75
76 public:
77 ~table_performance_timers() override = default;
78
79 private:
80 /** Table share lock. */
82 /** Table definition. */
84
85 /** Current row. */
87 /** Current position. */
89 /** Next position. */
92};
93
94/** @} */
95#endif
Definition: field.h:574
An abstract PERFORMANCE_SCHEMA table.
Definition: pfs_engine_table.h:69
Class to hold information regarding a table to be created on behalf of a plugin.
Definition: plugin_table.h:39
Table PERFORMANCE_SCHEMA.PERFORMANCE_TIMERS.
Definition: table_performance_timers.h:58
static Plugin_table m_table_def
Table definition.
Definition: table_performance_timers.h:83
PFS_simple_index m_next_pos
Next position.
Definition: table_performance_timers.h:90
int rnd_pos(const void *pos) override
Fetch a row by position.
Definition: table_performance_timers.cc:133
static THR_LOCK m_table_lock
Table share lock.
Definition: table_performance_timers.h:81
PFS_simple_index m_pos
Current position.
Definition: table_performance_timers.h:88
row_performance_timers * m_row
Current row.
Definition: table_performance_timers.h:86
int rnd_next() override
Fetch the next row in this cursor.
Definition: table_performance_timers.cc:116
static PFS_engine_table_share m_share
Table share.
Definition: table_performance_timers.h:61
table_performance_timers()
Definition: table_performance_timers.cc:83
int read_row_values(TABLE *table, unsigned char *buf, Field **fields, bool read_all) override
Read the current row values.
Definition: table_performance_timers.cc:140
row_performance_timers m_data[COUNT_TIMER_NAME]
Definition: table_performance_timers.h:91
static ha_rows get_row_count()
Definition: table_performance_timers.cc:79
~table_performance_timers() override=default
void reset_position(void) override
Reset the cursor position to the beginning of the table.
Definition: table_performance_timers.cc:111
static PFS_engine_table * create(PFS_engine_table_share *)
Definition: table_performance_timers.cc:75
char * pos
Definition: do_ctype.cc:76
This file includes constants used by all storage engines.
my_off_t ha_rows
Definition: my_base.h:1139
Multi-platform timer code.
Definition: buf0block_hint.cc:29
Data types for columns used in the performance schema tables (declarations)
#define COUNT_TIMER_NAME
Integer, number of values of.
Definition: pfs_column_types.h:95
enum_timer_name
Enum values for the TIMER_NAME columns.
Definition: pfs_column_types.h:82
Performance schema tables (declarations).
A PERFORMANCE_SCHEMA table share.
Definition: pfs_engine_table.h:357
Position of a cursor, for simple iterations.
Definition: pfs_engine_table.h:558
Definition: table.h:1396
Definition: thr_lock.h:138
Characteristics of a timer.
Definition: my_rdtsc.h:37
A row of PERFORMANCE_SCHEMA.PERFORMANCE_TIMERS.
Definition: table_performance_timers.h:47
struct my_timer_unit_info m_info
Columns ROUTINE (not displayed), TIMER_OVERHEAD, TIMER_FREQUENCY, TIMER_RESOLUTION.
Definition: table_performance_timers.h:54
enum_timer_name m_timer_name
Column TIMER_NAME.
Definition: table_performance_timers.h:49