MySQL 8.4.0
Source Code Documentation
table_status_by_thread.h
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23
24#ifndef TABLE_STATUS_BY_THREAD_H
25#define TABLE_STATUS_BY_THREAD_H
26
27/**
28 @file storage/perfschema/table_status_by_thread.h
29 Table STATUS_BY_THREAD (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_thread;
45struct TABLE;
46struct THR_LOCK;
47/**
48 @addtogroup performance_schema_tables
49 @{
50*/
51
52/**
53 A row of table
54 PERFORMANCE_SCHEMA.STATUS_BY_THREAD.
55*/
57 /** Column THREAD_ID. */
59 /** Column VARIABLE_NAME. */
61 /** Column VARIABLE_VALUE. */
63};
64
65/**
66 Position of a cursor on
67 PERFORMANCE_SCHEMA.STATUS_BY_THREAD.
68 Index 1 on thread (0 based)
69 Index 2 on status variable (0 based)
70*/
73
74 inline void reset() {
75 m_index_1 = 0;
76 m_index_2 = 0;
77 }
78
79 inline bool has_more_thread() {
81 }
82
83 inline void next_thread() {
84 m_index_1++;
85 m_index_2 = 0;
86 }
87};
88
90 public:
93 m_key_1("THREAD_ID"),
94 m_key_2("VARIABLE_NAME") {}
95
96 ~PFS_index_status_by_thread() override = default;
97
98 virtual bool match(PFS_thread *pfs);
99 virtual bool match(const Status_variable *pfs);
100
101 private:
104};
105
106/** Table PERFORMANCE_SCHEMA.STATUS_BY_THREAD. */
109
110 public:
111 /** Table share */
114 static int delete_all_rows();
115 static ha_rows get_row_count();
116
117 void reset_position() 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_thread() override = default;
133
134 protected:
135 int make_row(PFS_thread *thread, const Status_variable *status_var);
136
137 private:
138 /** Table share lock. */
140 /** Table definition. */
142
143 /** Current THD variables. */
145 /** Current row. */
147 /** Current position. */
149 /** Next position. */
151
153};
154
155/** @} */
156#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_thread.h:89
~PFS_index_status_by_thread() override=default
PFS_index_status_by_thread()
Definition: table_status_by_thread.h:91
PFS_key_thread_id m_key_1
Definition: table_status_by_thread.h:102
PFS_key_variable_name m_key_2
Definition: table_status_by_thread.h:103
virtual bool match(PFS_thread *pfs)
Definition: table_status_by_thread.cc:47
Definition: table_helper.h:1279
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_THREAD.
Definition: table_status_by_thread.h:107
static ha_rows get_row_count()
Definition: table_status_by_thread.cc:113
static int delete_all_rows()
Definition: table_status_by_thread.cc:103
int rnd_init(bool scan) override
Initialize table scan.
Definition: table_status_by_thread.cc:131
table_status_by_thread()
Definition: table_status_by_thread.cc:120
static Plugin_table m_table_def
Table definition.
Definition: table_status_by_thread.h:141
PFS_index_status_by_thread * m_opened_index
Definition: table_status_by_thread.h:152
int read_row_values(TABLE *table, unsigned char *buf, Field **fields, bool read_all) override
Read the current row values.
Definition: table_status_by_thread.cc:245
pos_t m_pos
Current position.
Definition: table_status_by_thread.h:148
row_status_by_thread m_row
Current row.
Definition: table_status_by_thread.h:146
pos_t m_next_pos
Next position.
Definition: table_status_by_thread.h:150
PFS_status_variable_cache m_status_cache
Current THD variables.
Definition: table_status_by_thread.h:144
int rnd_next() override
Fetch the next row in this cursor.
Definition: table_status_by_thread.cc:139
int index_init(uint idx, bool sorted) override
Definition: table_status_by_thread.cc:174
void reset_position() override
Reset the cursor position to the beginning of the table.
Definition: table_status_by_thread.cc:126
pos_status_by_thread pos_t
Definition: table_status_by_thread.h:108
int rnd_pos(const void *pos) override
Fetch a row by position.
Definition: table_status_by_thread.cc:159
~table_status_by_thread() override=default
int make_row(PFS_thread *thread, const Status_variable *status_var)
Definition: table_status_by_thread.cc:217
static PFS_engine_table_share m_share
Table share.
Definition: table_status_by_thread.h:112
int index_next() override
Find key in index, read record.
Definition: table_status_by_thread.cc:187
static THR_LOCK m_table_lock
Table share lock.
Definition: table_status_by_thread.h:139
static PFS_engine_table * create(PFS_engine_table_share *)
Definition: table_status_by_thread.cc:99
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.
unsigned long long int ulonglong
Definition: my_inttypes.h:56
static PFS_engine_table_share_proxy table
Definition: pfs.cc:61
Definition: buf0block_hint.cc:30
Generic buffer container.
PFS_thread_container global_thread_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
Instrumented thread implementation.
Definition: pfs_instr.h:375
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_THREAD.
Definition: table_status_by_thread.h:71
pos_status_by_thread()
Definition: table_status_by_thread.h:72
void next_thread()
Definition: table_status_by_thread.h:83
void reset()
Definition: table_status_by_thread.h:74
bool has_more_thread()
Definition: table_status_by_thread.h:79
A row of table PERFORMANCE_SCHEMA.STATUS_BY_THREAD.
Definition: table_status_by_thread.h:56
PFS_variable_value_row m_variable_value
Column VARIABLE_VALUE.
Definition: table_status_by_thread.h:62
ulonglong m_thread_internal_id
Column THREAD_ID.
Definition: table_status_by_thread.h:58
PFS_variable_name_row m_variable_name
Column VARIABLE_NAME.
Definition: table_status_by_thread.h:60
Helpers to implement a performance schema table.