MySQL 8.0.29
Source Code Documentation
table_file_instances.h
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22
23#ifndef TABLE_FILE_INSTANCES_H
24#define TABLE_FILE_INSTANCES_H
25
26/**
27 @file storage/perfschema/table_file_instances.h
28 Table FILE_INSTANCES (declarations).
29*/
30
31#include <sys/types.h>
32
33#include "my_base.h"
36
37class Field;
38class Plugin_table;
39struct PFS_file;
40struct TABLE;
41struct THR_LOCK;
42
43/**
44 @addtogroup performance_schema_tables
45 @{
46*/
47
48/** A row of PERFORMANCE_SCHEMA.FILE_INSTANCES. */
50 /** Column FILE_NAME. */
52 /** Column EVENT_NAME. */
53 const char *m_event_name;
54 /** Length in bytes of @c m_event_name. */
56 /** Column OPEN_COUNT. */
58};
59
61 public:
63 : PFS_engine_index(key_1) {}
64
65 ~PFS_index_file_instances() override = default;
66
67 virtual bool match(const PFS_file *pfs) = 0;
68};
69
71 public:
73 : PFS_index_file_instances(&m_key), m_key("FILE_NAME") {}
74
76
77 bool match(const PFS_file *pfs) override;
78
79 private:
81};
82
84 public:
86 : PFS_index_file_instances(&m_key), m_key("EVENT_NAME") {}
87
89
90 bool match(const PFS_file *pfs) override;
91
92 private:
94};
95
96/** Table PERFORMANCE_SCHEMA.FILE_INSTANCES. */
98 public:
99 /** Table share */
102 static ha_rows get_row_count();
103
104 void reset_position(void) override;
105
106 int rnd_next() override;
107 int rnd_pos(const void *pos) override;
108
109 int index_init(uint idx, bool sorted) override;
110 int index_next() override;
111
112 private:
113 int read_row_values(TABLE *table, unsigned char *buf, Field **fields,
114 bool read_all) override;
116
117 public:
118 ~table_file_instances() override = default;
119
120 private:
121 int make_row(PFS_file *pfs);
122
123 /** Table share lock. */
125 /** Table definition. */
127
128 /** Current row. */
130 /** Current position. */
132 /** Next position. */
134
136};
137
138/** @} */
139#endif
Definition: field.h:573
Definition: pfs_engine_table.h:299
Definition: pfs_engine_table.h:267
An abstract PERFORMANCE_SCHEMA table.
Definition: pfs_engine_table.h:69
Definition: table_file_instances.h:83
~PFS_index_file_instances_by_event_name() override=default
bool match(const PFS_file *pfs) override
Definition: table_file_instances.cc:87
PFS_index_file_instances_by_event_name()
Definition: table_file_instances.h:85
PFS_key_event_name m_key
Definition: table_file_instances.h:93
Definition: table_file_instances.h:70
~PFS_index_file_instances_by_file_name() override=default
PFS_index_file_instances_by_file_name()
Definition: table_file_instances.h:72
bool match(const PFS_file *pfs) override
Definition: table_file_instances.cc:78
PFS_key_file_name m_key
Definition: table_file_instances.h:80
Definition: table_file_instances.h:60
PFS_index_file_instances(PFS_engine_key *key_1)
Definition: table_file_instances.h:62
virtual bool match(const PFS_file *pfs)=0
~PFS_index_file_instances() override=default
Definition: table_helper.h:1431
Definition: table_helper.h:1586
Class to hold information regarding a table to be created on behalf of a plugin.
Definition: plugin_table.h:39
Table PERFORMANCE_SCHEMA.FILE_INSTANCES.
Definition: table_file_instances.h:97
void reset_position(void) override
Reset the cursor position to the beginning of the table.
Definition: table_file_instances.cc:107
table_file_instances()
Definition: table_file_instances.cc:104
row_file_instances m_row
Current row.
Definition: table_file_instances.h:129
PFS_index_file_instances * m_opened_index
Definition: table_file_instances.h:135
int rnd_next() override
Fetch the next row in this cursor.
Definition: table_file_instances.cc:112
PFS_simple_index m_pos
Current position.
Definition: table_file_instances.h:131
PFS_simple_index m_next_pos
Next position.
Definition: table_file_instances.h:133
int make_row(PFS_file *pfs)
Definition: table_file_instances.cc:180
static PFS_engine_table_share m_share
Table share.
Definition: table_file_instances.h:100
int index_init(uint idx, bool sorted) override
Definition: table_file_instances.cc:139
int index_next() override
Find key in index, read record.
Definition: table_file_instances.cc:159
static ha_rows get_row_count()
Definition: table_file_instances.cc:100
static THR_LOCK m_table_lock
Table share lock.
Definition: table_file_instances.h:124
int rnd_pos(const void *pos) override
Fetch a row by position.
Definition: table_file_instances.cc:126
~table_file_instances() override=default
static PFS_engine_table * create(PFS_engine_table_share *)
Definition: table_file_instances.cc:96
static Plugin_table m_table_def
Table definition.
Definition: table_file_instances.h:126
int read_row_values(TABLE *table, unsigned char *buf, Field **fields, bool read_all) override
Read the current row values.
Definition: table_file_instances.cc:204
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
Definition: buf0block_hint.cc:29
Performance schema tables (declarations).
static const LEX_CSTRING pfs
Definition: sql_show_processlist.cc:65
A PERFORMANCE_SCHEMA table share.
Definition: pfs_engine_table.h:357
Definition: pfs_name.h:283
Instrumented File and FILE implementation.
Definition: pfs_instr.h:176
Position of a cursor, for simple iterations.
Definition: pfs_engine_table.h:558
Definition: table.h:1394
Definition: thr_lock.h:138
A row of PERFORMANCE_SCHEMA.FILE_INSTANCES.
Definition: table_file_instances.h:49
PFS_file_name m_file_name
Column FILE_NAME.
Definition: table_file_instances.h:51
uint m_open_count
Column OPEN_COUNT.
Definition: table_file_instances.h:57
uint m_event_name_length
Length in bytes of m_event_name.
Definition: table_file_instances.h:55
const char * m_event_name
Column EVENT_NAME.
Definition: table_file_instances.h:53
Helpers to implement a performance schema table.
unsigned int uint
Definition: uca-dump.cc:29