MySQL 9.0.0
Source Code Documentation
table_performance_timers.h
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23
24#ifndef TABLE_PERFORMANCE_TIMERS_H
25#define TABLE_PERFORMANCE_TIMERS_H
26
27/**
28 @file storage/perfschema/table_performance_timers.h
29 Table PERFORMANCE_TIMERS (declarations).
30*/
31
32#include "my_base.h"
33#include "my_rdtsc.h"
36
37class Field;
38class Plugin_table;
39struct TABLE;
40struct THR_LOCK;
41
42/**
43 @addtogroup performance_schema_tables
44 @{
45*/
46
47/** A row of PERFORMANCE_SCHEMA.PERFORMANCE_TIMERS. */
49 /** Column TIMER_NAME. */
51 /**
52 Columns ROUTINE (not displayed), TIMER_OVERHEAD,
53 TIMER_FREQUENCY, TIMER_RESOLUTION.
54 */
56};
57
58/** Table PERFORMANCE_SCHEMA.PERFORMANCE_TIMERS. */
60 public:
61 /** Table share. */
64 static ha_rows get_row_count();
65
66 int rnd_next() override;
67 int rnd_pos(const void *pos) override;
68 void reset_position() override;
69
70 protected:
71 int read_row_values(TABLE *table, unsigned char *buf, Field **fields,
72 bool read_all) override;
73
74 protected:
76
77 public:
78 ~table_performance_timers() override = default;
79
80 private:
81 /** Table share lock. */
83 /** Table definition. */
85
86 /** Current row. */
88 /** Current position. */
90 /** Next position. */
93};
94
95/** @} */
96#endif
Definition: field.h:577
An abstract PERFORMANCE_SCHEMA table.
Definition: pfs_engine_table.h:70
Class to hold information regarding a table to be created on behalf of a plugin.
Definition: plugin_table.h:40
Table PERFORMANCE_SCHEMA.PERFORMANCE_TIMERS.
Definition: table_performance_timers.h:59
static Plugin_table m_table_def
Table definition.
Definition: table_performance_timers.h:84
PFS_simple_index m_next_pos
Next position.
Definition: table_performance_timers.h:91
int rnd_pos(const void *pos) override
Fetch a row by position.
Definition: table_performance_timers.cc:132
static THR_LOCK m_table_lock
Table share lock.
Definition: table_performance_timers.h:82
PFS_simple_index m_pos
Current position.
Definition: table_performance_timers.h:89
row_performance_timers * m_row
Current row.
Definition: table_performance_timers.h:87
int rnd_next() override
Fetch the next row in this cursor.
Definition: table_performance_timers.cc:115
static PFS_engine_table_share m_share
Table share.
Definition: table_performance_timers.h:62
table_performance_timers()
Definition: table_performance_timers.cc:82
void reset_position() override
Reset the cursor position to the beginning of the table.
Definition: table_performance_timers.cc:110
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:139
row_performance_timers m_data[COUNT_TIMER_NAME]
Definition: table_performance_timers.h:92
static ha_rows get_row_count()
Definition: table_performance_timers.cc:80
~table_performance_timers() override=default
static PFS_engine_table * create(PFS_engine_table_share *)
Definition: table_performance_timers.cc:76
This file includes constants used by all storage engines.
my_off_t ha_rows
Definition: my_base.h:1141
Multi-platform timer code.
static PFS_engine_table_share_proxy table
Definition: pfs.cc:61
Definition: buf0block_hint.cc:30
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:101
enum_timer_name
Enum values for the TIMER_NAME columns.
Definition: pfs_column_types.h:88
Performance schema tables (declarations).
A PERFORMANCE_SCHEMA table share.
Definition: pfs_engine_table.h:358
Position of a cursor, for simple iterations.
Definition: pfs_engine_table.h:566
Definition: table.h:1407
Definition: thr_lock.h:139
Characteristics of a timer.
Definition: my_rdtsc.h:38
A row of PERFORMANCE_SCHEMA.PERFORMANCE_TIMERS.
Definition: table_performance_timers.h:48
struct my_timer_unit_info m_info
Columns ROUTINE (not displayed), TIMER_OVERHEAD, TIMER_FREQUENCY, TIMER_RESOLUTION.
Definition: table_performance_timers.h:55
enum_timer_name m_timer_name
Column TIMER_NAME.
Definition: table_performance_timers.h:50