MySQL 8.4.0
Source Code Documentation
table_md_locks.h
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23
24#ifndef TABLE_METADATA_LOCK_H
25#define TABLE_METADATA_LOCK_H
26
27/**
28 @file storage/perfschema/table_md_locks.h
29 Table METADATA_LOCKS (declarations).
30*/
31
32#include <sys/types.h>
33
34#include "my_base.h"
39
40class Field;
41class Plugin_table;
43struct TABLE;
44struct THR_LOCK;
45
46/**
47 @addtogroup performance_schema_tables
48 @{
49*/
50
51/** A row of table PERFORMANCE_SCHEMA.MUTEX_INSTANCES. */
53 /** Column OBJECT_INSTANCE_BEGIN. */
54 const void *m_identity;
58 /** Column SOURCE. */
60 /** Length in bytes of @c m_source. */
62 /** Column OWNER_THREAD_ID. */
64 /** Column OWNER_EVENT_ID. */
66 /** Columns OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME, COLUMN_NAME. */
68};
69
71 public:
73 : PFS_engine_index(key_1) {}
74
76 : PFS_engine_index(key_1, key_2) {}
77
79 PFS_engine_key *key_3, PFS_engine_key *key_4)
80 : PFS_engine_index(key_1, key_2, key_3, key_4) {}
81
82 ~PFS_index_metadata_locks() override = default;
83
84 virtual bool match(const PFS_metadata_lock *pfs) = 0;
85};
86
88 public:
90 : PFS_index_metadata_locks(&m_key), m_key("OBJECT_INSTANCE_BEGIN") {}
91
93
94 bool match(const PFS_metadata_lock *pfs) override;
95
96 private:
98};
99
101 public:
104 m_key_1("OBJECT_TYPE"),
105 m_key_2("OBJECT_SCHEMA"),
106 m_key_3("OBJECT_NAME"),
107 m_key_4("COLUMN_NAME") {}
108
110
111 bool match(const PFS_metadata_lock *pfs) override;
112
113 private:
118};
119
121 public:
124 m_key_1("OWNER_THREAD_ID"),
125 m_key_2("OWNER_EVENT_ID") {}
126
128
129 bool match(const PFS_metadata_lock *pfs) override;
130
131 private:
134};
135
136/** Table PERFORMANCE_SCHEMA.METADATA_LOCKS. */
138 public:
139 /** Table share. */
142 static ha_rows get_row_count();
143
144 void reset_position() override;
145
146 int rnd_next() override;
147 int rnd_pos(const void *pos) override;
148
149 int index_init(uint idx, bool sorted) override;
150 int index_next() override;
151
152 private:
153 int read_row_values(TABLE *table, unsigned char *buf, Field **fields,
154 bool read_all) override;
156
157 public:
158 ~table_metadata_locks() override = default;
159
160 private:
162
163 /** Table share lock. */
165 /** Table definition. */
167
168 /** Current row. */
170 /** Current position. */
172 /** Next position. */
174
175 protected:
177};
178
179/** @} */
180#endif
Definition: field.h:575
Definition: pfs_engine_table.h:300
Definition: pfs_engine_table.h:268
An abstract PERFORMANCE_SCHEMA table.
Definition: pfs_engine_table.h:70
Definition: table_md_locks.h:87
~PFS_index_metadata_locks_by_instance() override=default
bool match(const PFS_metadata_lock *pfs) override
Definition: table_md_locks.cc:87
PFS_key_object_instance m_key
Definition: table_md_locks.h:97
PFS_index_metadata_locks_by_instance()
Definition: table_md_locks.h:89
Definition: table_md_locks.h:100
PFS_key_object_name m_key_3
Definition: table_md_locks.h:116
PFS_key_object_schema m_key_2
Definition: table_md_locks.h:115
PFS_index_metadata_locks_by_object()
Definition: table_md_locks.h:102
PFS_key_column_name m_key_4
Definition: table_md_locks.h:117
~PFS_index_metadata_locks_by_object() override=default
PFS_key_object_type m_key_1
Definition: table_md_locks.h:114
bool match(const PFS_metadata_lock *pfs) override
Definition: table_md_locks.cc:97
Definition: table_md_locks.h:120
~PFS_index_metadata_locks_by_owner() override=default
bool match(const PFS_metadata_lock *pfs) override
Definition: table_md_locks.cc:131
PFS_index_metadata_locks_by_owner()
Definition: table_md_locks.h:122
PFS_key_thread_id m_key_1
Definition: table_md_locks.h:132
PFS_key_event_id m_key_2
Definition: table_md_locks.h:133
Definition: table_md_locks.h:70
~PFS_index_metadata_locks() override=default
virtual bool match(const PFS_metadata_lock *pfs)=0
PFS_index_metadata_locks(PFS_engine_key *key_1)
Definition: table_md_locks.h:72
PFS_index_metadata_locks(PFS_engine_key *key_1, PFS_engine_key *key_2, PFS_engine_key *key_3, PFS_engine_key *key_4)
Definition: table_md_locks.h:78
PFS_index_metadata_locks(PFS_engine_key *key_1, PFS_engine_key *key_2)
Definition: table_md_locks.h:75
Definition: table_helper.h:1672
Definition: table_helper.h:1295
Definition: table_helper.h:1719
Definition: table_helper.h:1656
Definition: table_helper.h:1641
Definition: table_helper.h:1681
Definition: table_helper.h:1279
Class to hold information regarding a table to be created on behalf of a plugin.
Definition: plugin_table.h:40
Table PERFORMANCE_SCHEMA.METADATA_LOCKS.
Definition: table_md_locks.h:137
static Plugin_table m_table_def
Table definition.
Definition: table_md_locks.h:166
static PFS_engine_table * create(PFS_engine_table_share *)
Definition: table_md_locks.cc:147
int rnd_next() override
Fetch the next row in this cursor.
Definition: table_md_locks.cc:163
int index_init(uint idx, bool sorted) override
Definition: table_md_locks.cc:190
PFS_index_metadata_locks * m_opened_index
Definition: table_md_locks.h:176
static PFS_engine_table_share m_share
Table share.
Definition: table_md_locks.h:140
static ha_rows get_row_count()
Definition: table_md_locks.cc:151
int read_row_values(TABLE *table, unsigned char *buf, Field **fields, bool read_all) override
Read the current row values.
Definition: table_md_locks.cc:262
int index_next() override
Find key in index, read record.
Definition: table_md_locks.cc:213
PFS_simple_index m_pos
Current position.
Definition: table_md_locks.h:171
int rnd_pos(const void *pos) override
Fetch a row by position.
Definition: table_md_locks.cc:177
row_metadata_lock m_row
Current row.
Definition: table_md_locks.h:169
~table_metadata_locks() override=default
void reset_position() override
Reset the cursor position to the beginning of the table.
Definition: table_md_locks.cc:158
int make_row(PFS_metadata_lock *pfs)
Definition: table_md_locks.cc:234
PFS_simple_index m_next_pos
Next position.
Definition: table_md_locks.h:173
table_metadata_locks()
Definition: table_md_locks.cc:155
static THR_LOCK m_table_lock
Table share lock.
Definition: table_md_locks.h:164
int opaque_mdl_duration
Definition: psi_mdl_bits.h:42
int opaque_mdl_status
Definition: psi_mdl_bits.h:45
int opaque_mdl_type
Definition: psi_mdl_bits.h:36
This file includes constants used by all storage engines.
my_off_t ha_rows
Definition: my_base.h:1141
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_SOURCE_SIZE
Size of the SOURCE columns, in bytes.
Definition: pfs_column_types.h:76
Performance schema tables (declarations).
Performance schema instrumentation interface.
static const LEX_CSTRING pfs
Definition: sql_show_processlist.cc:66
Row fragment for columns OBJECT_TYPE, SCHEMA_NAME, OBJECT_NAME, COLUMN_NAME.
Definition: table_helper.h:635
A PERFORMANCE_SCHEMA table share.
Definition: pfs_engine_table.h:358
Instrumented metadata lock implementation.
Definition: pfs_instr.h:318
Position of a cursor, for simple iterations.
Definition: pfs_engine_table.h:558
Definition: table.h:1405
Definition: thr_lock.h:139
A row of table PERFORMANCE_SCHEMA.MUTEX_INSTANCES.
Definition: table_md_locks.h:52
uint m_source_length
Length in bytes of m_source.
Definition: table_md_locks.h:61
ulong m_owner_thread_id
Column OWNER_THREAD_ID.
Definition: table_md_locks.h:63
opaque_mdl_status m_mdl_status
Definition: table_md_locks.h:57
ulong m_owner_event_id
Column OWNER_EVENT_ID.
Definition: table_md_locks.h:65
opaque_mdl_duration m_mdl_duration
Definition: table_md_locks.h:56
PFS_column_row m_object
Columns OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME, COLUMN_NAME.
Definition: table_md_locks.h:67
char m_source[COL_SOURCE_SIZE]
Column SOURCE.
Definition: table_md_locks.h:59
const void * m_identity
Column OBJECT_INSTANCE_BEGIN.
Definition: table_md_locks.h:54
opaque_mdl_type m_mdl_type
Definition: table_md_locks.h:55
Helpers to implement a performance schema table.