MySQL 8.0.31
Source Code Documentation
table_status_by_host.h
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22
23#ifndef TABLE_STATUS_BY_HOST_H
24#define TABLE_STATUS_BY_HOST_H
25
26/**
27 @file storage/perfschema/table_status_by_host.h
28 Table STATUS_BY_HOST (declarations).
29*/
30
31#include <sys/types.h>
32
33#include "my_base.h"
34#include "my_inttypes.h"
40
41class Field;
42class Plugin_table;
43struct PFS_host;
44struct TABLE;
45struct THR_LOCK;
46
47/**
48 @addtogroup performance_schema_tables
49 @{
50*/
51
52/**
53 A row of table
54 PERFORMANCE_SCHEMA.STATUS_BY_HOST.
55*/
57 /** Column HOST */
59 /** Column VARIABLE_NAME. */
61 /** Column VARIABLE_VALUE. */
63};
64
65/**
66 Position of a cursor on
67 PERFORMANCE_SCHEMA.STATUS_BY_HOST.
68 Index 1 on host (0 based)
69 Index 2 on status variable (0 based)
70*/
73
74 inline void reset(void) {
75 m_index_1 = 0;
76 m_index_2 = 0;
77 }
78
79 inline bool has_more_host(void) {
81 }
82
83 inline void next_host(void) {
84 m_index_1++;
85 m_index_2 = 0;
86 }
87};
88
90 public:
93 m_key_1("HOST"),
94 m_key_2("VARIABLE_NAME") {}
95
96 ~PFS_index_status_by_host() override = default;
97
98 virtual bool match(PFS_host *pfs);
99 virtual bool match(const Status_variable *pfs);
100
101 private:
104};
105
106/** Table PERFORMANCE_SCHEMA.STATUS_BY_HOST. */
109
110 public:
111 /** Table share */
114 static int delete_all_rows();
115 static ha_rows get_row_count();
116
117 void reset_position(void) override;
118
119 int rnd_init(bool scan) override;
120 int rnd_next() override;
121 int rnd_pos(const void *pos) override;
122
123 int index_init(uint idx, bool sorted) override;
124 int index_next() override;
125
126 protected:
127 int read_row_values(TABLE *table, unsigned char *buf, Field **fields,
128 bool read_all) override;
130
131 public:
132 ~table_status_by_host() override = default;
133
134 protected:
135 int make_row(PFS_host *pfs_host, const Status_variable *status_var);
136
137 private:
138 /** Table share lock. */
140 /** Table definition. */
142
143 /** Status variable cache for one host. */
145
146 /** Current row. */
148 /** Current position. */
150 /** Next position. */
152
154};
155
156/** @} */
157#endif
Definition: field.h:574
size_t get_row_count()
Definition: pfs_buffer_container.h:464
Definition: pfs_engine_table.h:299
An abstract PERFORMANCE_SCHEMA table.
Definition: pfs_engine_table.h:69
Definition: table_status_by_host.h:89
PFS_index_status_by_host()
Definition: table_status_by_host.h:91
virtual bool match(PFS_host *pfs)
Definition: table_status_by_host.cc:79
PFS_key_variable_name m_key_2
Definition: table_status_by_host.h:103
~PFS_index_status_by_host() override=default
PFS_key_host m_key_1
Definition: table_status_by_host.h:102
Definition: table_helper.h:1458
Definition: table_helper.h:1531
Status variable cache.
Definition: pfs_variable.h:679
Class to hold information regarding a table to be created on behalf of a plugin.
Definition: plugin_table.h:39
Status variable derived from SHOW_VAR.
Definition: pfs_variable.h:209
Table PERFORMANCE_SCHEMA.STATUS_BY_HOST.
Definition: table_status_by_host.h:107
void reset_position(void) override
Reset the cursor position to the beginning of the table.
Definition: table_status_by_host.cc:124
int rnd_init(bool scan) override
Initialize table scan.
Definition: table_status_by_host.cc:129
~table_status_by_host() override=default
static int delete_all_rows()
Definition: table_status_by_host.cc:102
pos_t m_next_pos
Next position.
Definition: table_status_by_host.h:151
static PFS_engine_table * create(PFS_engine_table_share *)
Definition: table_status_by_host.cc:98
int rnd_pos(const void *pos) override
Fetch a row by position.
Definition: table_status_by_host.cc:161
int index_next() override
Find key in index, read record.
Definition: table_status_by_host.cc:189
PFS_index_status_by_host * m_opened_index
Definition: table_status_by_host.h:153
PFS_status_variable_cache m_status_cache
Status variable cache for one host.
Definition: table_status_by_host.h:144
static THR_LOCK m_table_lock
Table share lock.
Definition: table_status_by_host.h:139
int rnd_next() override
Fetch the next row in this cursor.
Definition: table_status_by_host.cc:136
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:249
table_status_by_host()
Definition: table_status_by_host.cc:118
int index_init(uint idx, bool sorted) override
Definition: table_status_by_host.cc:176
static Plugin_table m_table_def
Table definition.
Definition: table_status_by_host.h:141
pos_status_by_host pos_t
Definition: table_status_by_host.h:108
static ha_rows get_row_count()
Definition: table_status_by_host.cc:111
row_status_by_host m_row
Current row.
Definition: table_status_by_host.h:147
static PFS_engine_table_share m_share
Table share.
Definition: table_status_by_host.h:112
pos_t m_pos
Current position.
Definition: table_status_by_host.h:149
int make_row(PFS_host *pfs_host, const Status_variable *status_var)
Definition: table_status_by_host.cc:224
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
Some integer typedefs for easier portability.
Definition: buf0block_hint.cc:29
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:65
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:357
Row fragment for column HOST.
Definition: table_helper.h:526
Per host statistics.
Definition: pfs_host.h:63
Definition: table_helper.h:1086
Definition: table_helper.h:1099
Definition: table.h:1396
Definition: thr_lock.h:138
Position of a cursor on PERFORMANCE_SCHEMA.STATUS_BY_HOST.
Definition: table_status_by_host.h:71
void next_host(void)
Definition: table_status_by_host.h:83
bool has_more_host(void)
Definition: table_status_by_host.h:79
void reset(void)
Definition: table_status_by_host.h:74
pos_status_by_host()
Definition: table_status_by_host.h:72
A row of table PERFORMANCE_SCHEMA.STATUS_BY_HOST.
Definition: table_status_by_host.h:56
PFS_variable_name_row m_variable_name
Column VARIABLE_NAME.
Definition: table_status_by_host.h:60
PFS_host_row m_host
Column HOST.
Definition: table_status_by_host.h:58
PFS_variable_value_row m_variable_value
Column VARIABLE_VALUE.
Definition: table_status_by_host.h:62
Helpers to implement a performance schema table.
unsigned int uint
Definition: uca-dump.cc:29