MySQL 9.1.0
Source Code Documentation
table_global_variable_attributes.h
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23
24#ifndef TABLE_GLOBAL_VARIABLE_ATTRIBUTES_H
25#define TABLE_GLOBAL_VARIABLE_ATTRIBUTES_H
26
27/**
28 @file storage/perfschema/table_global_variable_attributes.h
29 Table GLOBAL_VARIABLE_ATTRIBUTES (declarations).
30*/
31
32#include <sys/types.h>
33
34#include "my_base.h"
35#include "my_inttypes.h"
37#include "mysql_com.h"
41
42class Field;
43class Plugin_table;
44struct TABLE;
45struct THR_LOCK;
46
47/**
48 A row of table
49 PERFORMANCE_SCHEMA.GLOBAL_VARIABLE_ATTRIBUTES.
50*/
51
55 const char *attribute_name,
56 const char *attribute_value);
60
61 /** Column VARIABLE_NAME. */
64 /** Column ATTR_NAME. */
67 /** Column ATTR_VALUE. */
70};
71
72/** Table PERFORMANCE_SCHEMA.GLOBAL_VARIABLE_ATTRIBUTES. */
78
79 public:
80 /** Table share */
83 static ha_rows get_row_count();
84
85 int rnd_init(bool scan) override;
86 int rnd_next() override;
87 int rnd_pos(const void *pos) override;
88 void reset_position() override;
89
90 protected:
91 int read_row_values(TABLE *table, unsigned char *buf, Field **fields,
92 bool read_all) override;
94
95 public:
97
98 protected:
99 /* Build sys_var tracker array. */
100 bool init_sys_var_array();
101 /* Build sys_var info cache. */
102 int do_materialize_all();
103
105
106 private:
107 /** Table share lock. */
109 /** Table definition. */
111
112 /* True when system variable descriptors array is complete. */
114 /* Array of system variable descriptors. */
116 /* Cache of materialized variables. */
118 /* True when cache is complete. */
120 /* Version of global hash/array. Changes when vars added/removed. */
122
123 /** Current row. */
125 /** Current position. */
127 /** Next position. */
129};
130
131#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
A typesafe replacement for DYNAMIC_ARRAY.
Definition: prealloced_array.h:71
A class representing one system variable - that is something that can be accessed as @global....
Definition: set_var.h:107
Table PERFORMANCE_SCHEMA.GLOBAL_VARIABLE_ATTRIBUTES.
Definition: table_global_variable_attributes.h:73
bool init_sys_var_array()
Build a sorted list of all system variables from the system variable hash.
Definition: table_global_variable_attributes.cc:142
~table_global_variable_attributes() override=default
Prealloced_array< row_global_variable_attributes, SYSTEM_VARIABLE_PREALLOC > Variable_array
Definition: table_global_variable_attributes.h:77
pos_t m_next_pos
Next position.
Definition: table_global_variable_attributes.h:128
void reset_position() override
Reset the cursor position to the beginning of the table.
Definition: table_global_variable_attributes.cc:211
int read_row_values(TABLE *table, unsigned char *buf, Field **fields, bool read_all) override
Read the current row values.
Definition: table_global_variable_attributes.cc:247
Variable_array m_cache
Definition: table_global_variable_attributes.h:117
int rnd_init(bool scan) override
Initialize table scan.
Definition: table_global_variable_attributes.cc:216
table_global_variable_attributes()
Definition: table_global_variable_attributes.cc:128
PFS_simple_index pos_t
Definition: table_global_variable_attributes.h:74
int make_row(const row_global_variable_attributes &row)
Definition: table_global_variable_attributes.cc:241
ulonglong m_version
Definition: table_global_variable_attributes.h:121
bool m_initialized
Definition: table_global_variable_attributes.h:113
pos_t m_pos
Current position.
Definition: table_global_variable_attributes.h:126
static Plugin_table m_table_def
Table definition.
Definition: table_global_variable_attributes.h:110
int do_materialize_all()
Build a GLOBAL system variable cache.
Definition: table_global_variable_attributes.cc:173
row_global_variable_attributes m_row
Current row.
Definition: table_global_variable_attributes.h:124
static PFS_engine_table_share m_share
Table share.
Definition: table_global_variable_attributes.h:81
bool m_materialized
Definition: table_global_variable_attributes.h:119
int rnd_pos(const void *pos) override
Fetch a row by position.
Definition: table_global_variable_attributes.cc:233
static THR_LOCK m_table_lock
Table share lock.
Definition: table_global_variable_attributes.h:108
static ha_rows get_row_count()
Definition: table_global_variable_attributes.cc:126
System_variable_tracker::Array m_sys_var_tracker_array
Definition: table_global_variable_attributes.h:115
int rnd_next() override
Fetch the next row in this cursor.
Definition: table_global_variable_attributes.cc:222
static PFS_engine_table * create(PFS_engine_table_share *)
Definition: table_global_variable_attributes.cc:121
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
Common definition between mysql server & client.
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 COL_SHORT_NAME_SIZE
Size of the short NAME columns, in bytes.
Definition: pfs_column_types.h:81
#define COL_OBJECT_NAME_SIZE
Size of the OBJECT_NAME columns, in bytes.
Definition: pfs_column_types.h:55
#define COL_INFO_SIZE
Size of INFO columns, in bytes.
Definition: pfs_column_types.h:71
Performance schema tables (declarations).
Performance schema system and status variables (declarations).
#define SYSTEM_VARIABLE_PREALLOC
Definition: pfs_variable.h:152
A PERFORMANCE_SCHEMA table share.
Definition: pfs_engine_table.h:359
Position of a cursor, for simple iterations.
Definition: pfs_engine_table.h:567
Definition: table.h:1421
Definition: thr_lock.h:139
A row of table PERFORMANCE_SCHEMA.GLOBAL_VARIABLE_ATTRIBUTES.
Definition: table_global_variable_attributes.h:52
uint m_variable_name_length
Definition: table_global_variable_attributes.h:63
char m_attr_value[COL_INFO_SIZE]
Column ATTR_VALUE.
Definition: table_global_variable_attributes.h:68
char m_attr_name[COL_SHORT_NAME_SIZE]
Column ATTR_NAME.
Definition: table_global_variable_attributes.h:65
uint m_attr_value_length
Definition: table_global_variable_attributes.h:69
row_global_variable_attributes & operator=(const row_global_variable_attributes &other)
Definition: table_global_variable_attributes.cc:76
char m_variable_name[COL_OBJECT_NAME_SIZE]
Column VARIABLE_NAME.
Definition: table_global_variable_attributes.h:62
row_global_variable_attributes()
Definition: table_global_variable_attributes.cc:48
uint m_attr_name_length
Definition: table_global_variable_attributes.h:66