MySQL 8.0.29
Source Code Documentation
table_data_locks.h
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22
23#ifndef TABLE_DATA_LOCK_H
24#define TABLE_DATA_LOCK_H
25
26/**
27 @file storage/perfschema/table_data_locks.h
28 Table DATA_LOCKS (declarations).
29*/
30
31#include <sys/types.h>
32
33#include "my_base.h"
37
38class Field;
40class Plugin_table;
41struct TABLE;
42struct THR_LOCK;
43
44/**
45 @addtogroup Performance_schema_tables
46 @{
47*/
48
49/**
50 Position of a cursor on
51 PERFORMANCE_SCHEMA.DATA_LOCKS.
52 Index 1 on engine (0 based)
53 Index 2 on engine index (0 based)
54*/
57 m_index_1 = 0;
58 m_index_2 = 0;
59 }
60
61 inline void reset(void) {
62 m_index_1 = 0;
63 m_index_2 = 0;
64 }
65
66 void set_at(const scan_pos_data_lock *other) {
67 m_index_1 = other->m_index_1;
68 m_index_2 = other->m_index_2;
69 }
70
71 void set_after(const scan_pos_data_lock *other) {
72 m_index_1 = other->m_index_1;
73 m_index_2 = other->m_index_2 + 1;
74 }
75
76 inline bool has_more_engine() {
78 }
79
80 inline void next_engine() {
81 m_index_1++;
82 m_index_2 = 0;
83 }
84
85 unsigned int m_index_1;
86 unsigned int m_index_2;
87};
88
89/** Table PERFORMANCE_SCHEMA.DATA_LOCKS. */
93
94 public:
95 /** Table share. */
98 static ha_rows get_row_count();
99
100 int rnd_next() override;
101 int rnd_pos(const void *pos) override;
102 void reset_position(void) override;
103
104 int index_init(uint idx, bool sorted) override;
105 int index_next() override;
106
107 private:
108 int read_row_values(TABLE *table, unsigned char *buf, Field **fields,
109 bool read_all) override;
110
112
113 void destroy_iterators();
114
115 public:
116 ~table_data_locks() override;
117
118 private:
119 /** Table share lock. */
121 /** Table definition. */
123
124 /** Current row. */
126 /** Current scan position. */
128 /** Next scan position. */
130 /** Current pk position. */
132
135
137};
138
139/** @} */
140#endif
Definition: field.h:573
Definition: pfs_data_lock.h:612
An abstract PERFORMANCE_SCHEMA table.
Definition: pfs_engine_table.h:69
Definition: pfs_data_lock.h:148
Engine interface, row lock iterator.
Definition: psi_data_lock.h:290
Class to hold information regarding a table to be created on behalf of a plugin.
Definition: plugin_table.h:39
Table PERFORMANCE_SCHEMA.DATA_LOCKS.
Definition: table_data_locks.h:90
int rnd_next() override
Fetch the next row in this cursor.
Definition: table_data_locks.cc:132
int index_next() override
Find key in index, read record.
Definition: table_data_locks.cc:274
pk_pos_t m_pk_pos
Current pk position.
Definition: table_data_locks.h:131
PFS_index_data_locks * m_opened_index
Definition: table_data_locks.h:136
pk_pos_data_lock pk_pos_t
Definition: table_data_locks.h:92
scan_pos_t m_next_pos
Next scan position.
Definition: table_data_locks.h:129
~table_data_locks() override
Definition: table_data_locks.cc:122
static THR_LOCK m_table_lock
Table share lock.
Definition: table_data_locks.h:120
void reset_position(void) override
Reset the cursor position to the beginning of the table.
Definition: table_data_locks.cc:124
static ha_rows get_row_count()
Definition: table_data_locks.cc:97
table_data_locks()
Definition: table_data_locks.cc:102
PFS_data_lock_container m_container
Definition: table_data_locks.h:133
static PFS_engine_table_share m_share
Table share.
Definition: table_data_locks.h:96
static PFS_engine_table * create(PFS_engine_table_share *)
Definition: table_data_locks.cc:93
static Plugin_table m_table_def
Table definition.
Definition: table_data_locks.h:122
void destroy_iterators()
Definition: table_data_locks.cc:113
int rnd_pos(const void *pos) override
Fetch a row by position.
Definition: table_data_locks.cc:203
scan_pos_data_lock scan_pos_t
Definition: table_data_locks.h:91
PSI_engine_data_lock_iterator * m_iterator[COUNT_DATA_LOCK_ENGINES]
Definition: table_data_locks.h:134
int index_init(uint idx, bool sorted) override
Definition: table_data_locks.cc:246
scan_pos_t m_pos
Current scan position.
Definition: table_data_locks.h:127
int read_row_values(TABLE *table, unsigned char *buf, Field **fields, bool read_all) override
Read the current row values.
Definition: table_data_locks.cc:276
row_data_lock * m_row
Current row.
Definition: table_data_locks.h:125
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 instrumentation (declarations).
Performance schema tables (declarations).
Performance schema instrumentation (declarations).
#define COUNT_DATA_LOCK_ENGINES
Definition: pfs.h:71
A PERFORMANCE_SCHEMA table share.
Definition: pfs_engine_table.h:357
Definition: table.h:1394
Definition: thr_lock.h:138
Definition: pfs_data_lock.h:39
A row of table PERFORMANCE_SCHEMA.DATA_LOCKS.
Definition: pfs_data_lock.h:61
Position of a cursor on PERFORMANCE_SCHEMA.DATA_LOCKS.
Definition: table_data_locks.h:55
scan_pos_data_lock()
Definition: table_data_locks.h:56
void next_engine()
Definition: table_data_locks.h:80
void reset(void)
Definition: table_data_locks.h:61
unsigned int m_index_1
Definition: table_data_locks.h:85
bool has_more_engine()
Definition: table_data_locks.h:76
void set_after(const scan_pos_data_lock *other)
Definition: table_data_locks.h:71
void set_at(const scan_pos_data_lock *other)
Definition: table_data_locks.h:66
unsigned int m_index_2
Definition: table_data_locks.h:86
unsigned int uint
Definition: uca-dump.cc:29