MySQL 8.4.0
Source Code Documentation
table_status_by_host.h
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23
24#ifndef TABLE_STATUS_BY_HOST_H
25#define TABLE_STATUS_BY_HOST_H
26
27/**
28 @file storage/perfschema/table_status_by_host.h
29 Table STATUS_BY_HOST (declarations).
30*/
31
32#include <sys/types.h>
33
34#include "my_base.h"
35#include "my_inttypes.h"
41
42class Field;
43class Plugin_table;
44struct PFS_host;
45struct TABLE;
46struct THR_LOCK;
47
48/**
49 @addtogroup performance_schema_tables
50 @{
51*/
52
53/**
54 A row of table
55 PERFORMANCE_SCHEMA.STATUS_BY_HOST.
56*/
58 /** Column HOST */
60 /** Column VARIABLE_NAME. */
62 /** Column VARIABLE_VALUE. */
64};
65
66/**
67 Position of a cursor on
68 PERFORMANCE_SCHEMA.STATUS_BY_HOST.
69 Index 1 on host (0 based)
70 Index 2 on status variable (0 based)
71*/
74
75 inline void reset() {
76 m_index_1 = 0;
77 m_index_2 = 0;
78 }
79
80 inline bool has_more_host() {
82 }
83
84 inline void next_host() {
85 m_index_1++;
86 m_index_2 = 0;
87 }
88};
89
91 public:
94 m_key_1("HOST"),
95 m_key_2("VARIABLE_NAME") {}
96
97 ~PFS_index_status_by_host() override = default;
98
99 virtual bool match(PFS_host *pfs);
100 virtual bool match(const Status_variable *pfs);
101
102 private:
105};
106
107/** Table PERFORMANCE_SCHEMA.STATUS_BY_HOST. */
110
111 public:
112 /** Table share */
115 static int delete_all_rows();
116 static ha_rows get_row_count();
117
118 void reset_position() override;
119
120 int rnd_init(bool scan) override;
121 int rnd_next() override;
122 int rnd_pos(const void *pos) override;
123
124 int index_init(uint idx, bool sorted) override;
125 int index_next() override;
126
127 protected:
128 int read_row_values(TABLE *table, unsigned char *buf, Field **fields,
129 bool read_all) override;
131
132 public:
133 ~table_status_by_host() override = default;
134
135 protected:
136 int make_row(PFS_host *pfs_host, const Status_variable *status_var);
137
138 private:
139 /** Table share lock. */
141 /** Table definition. */
143
144 /** Status variable cache for one host. */
146
147 /** Current row. */
149 /** Current position. */
151 /** Next position. */
153
155};
156
157/** @} */
158#endif
Definition: field.h:575
size_t get_row_count()
Definition: pfs_buffer_container.h:465
Definition: pfs_engine_table.h:300
An abstract PERFORMANCE_SCHEMA table.
Definition: pfs_engine_table.h:70
Definition: table_status_by_host.h:90
PFS_index_status_by_host()
Definition: table_status_by_host.h:92
virtual bool match(PFS_host *pfs)
Definition: table_status_by_host.cc:80
PFS_key_variable_name m_key_2
Definition: table_status_by_host.h:104
~PFS_index_status_by_host() override=default
PFS_key_host m_key_1
Definition: table_status_by_host.h:103
Definition: table_helper.h:1504
Definition: table_helper.h:1577
Status variable cache.
Definition: pfs_variable.h:678
Class to hold information regarding a table to be created on behalf of a plugin.
Definition: plugin_table.h:40
Status variable derived from SHOW_VAR.
Definition: pfs_variable.h:208
Table PERFORMANCE_SCHEMA.STATUS_BY_HOST.
Definition: table_status_by_host.h:108
int rnd_init(bool scan) override
Initialize table scan.
Definition: table_status_by_host.cc:130
~table_status_by_host() override=default
static int delete_all_rows()
Definition: table_status_by_host.cc:103
pos_t m_next_pos
Next position.
Definition: table_status_by_host.h:152
static PFS_engine_table * create(PFS_engine_table_share *)
Definition: table_status_by_host.cc:99
int rnd_pos(const void *pos) override
Fetch a row by position.
Definition: table_status_by_host.cc:162
void reset_position() override
Reset the cursor position to the beginning of the table.
Definition: table_status_by_host.cc:125
int index_next() override
Find key in index, read record.
Definition: table_status_by_host.cc:190
PFS_index_status_by_host * m_opened_index
Definition: table_status_by_host.h:154
PFS_status_variable_cache m_status_cache
Status variable cache for one host.
Definition: table_status_by_host.h:145
static THR_LOCK m_table_lock
Table share lock.
Definition: table_status_by_host.h:140
int rnd_next() override
Fetch the next row in this cursor.
Definition: table_status_by_host.cc:137
int read_row_values(TABLE *table, unsigned char *buf, Field **fields, bool read_all) override
Read the current row values.
Definition: table_status_by_host.cc:250
table_status_by_host()
Definition: table_status_by_host.cc:119
int index_init(uint idx, bool sorted) override
Definition: table_status_by_host.cc:177
static Plugin_table m_table_def
Table definition.
Definition: table_status_by_host.h:142
pos_status_by_host pos_t
Definition: table_status_by_host.h:109
static ha_rows get_row_count()
Definition: table_status_by_host.cc:112
row_status_by_host m_row
Current row.
Definition: table_status_by_host.h:148
static PFS_engine_table_share m_share
Table share.
Definition: table_status_by_host.h:113
pos_t m_pos
Current position.
Definition: table_status_by_host.h:150
int make_row(PFS_host *pfs_host, const Status_variable *status_var)
Definition: table_status_by_host.cc:225
This file includes constants used by all storage engines.
my_off_t ha_rows
Definition: my_base.h:1141
Some integer typedefs for easier portability.
static PFS_engine_table_share_proxy table
Definition: pfs.cc:61
Definition: buf0block_hint.cc:30
Generic buffer container.
PFS_host_container global_host_container
Performance schema tables (declarations).
Performance schema system and status variables (declarations).
static const LEX_CSTRING pfs
Definition: sql_show_processlist.cc:66
Performance schema instrumentation (declarations).
Position of a double cursor, for iterations using 2 nested loops.
Definition: pfs_engine_table.h:593
uint m_index_1
Outer index.
Definition: pfs_engine_table.h:595
uint m_index_2
Current index within index_1.
Definition: pfs_engine_table.h:597
A PERFORMANCE_SCHEMA table share.
Definition: pfs_engine_table.h:358
Row fragment for column HOST.
Definition: table_helper.h:528
Per host statistics.
Definition: pfs_host.h:64
Definition: table_helper.h:1115
Definition: table_helper.h:1128
Definition: table.h:1405
Definition: thr_lock.h:139
Position of a cursor on PERFORMANCE_SCHEMA.STATUS_BY_HOST.
Definition: table_status_by_host.h:72
void next_host()
Definition: table_status_by_host.h:84
bool has_more_host()
Definition: table_status_by_host.h:80
void reset()
Definition: table_status_by_host.h:75
pos_status_by_host()
Definition: table_status_by_host.h:73
A row of table PERFORMANCE_SCHEMA.STATUS_BY_HOST.
Definition: table_status_by_host.h:57
PFS_variable_name_row m_variable_name
Column VARIABLE_NAME.
Definition: table_status_by_host.h:61
PFS_host_row m_host
Column HOST.
Definition: table_status_by_host.h:59
PFS_variable_value_row m_variable_value
Column VARIABLE_VALUE.
Definition: table_status_by_host.h:63
Helpers to implement a performance schema table.