MySQL 8.0.31
Source Code Documentation
table_md_locks.h
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22
23#ifndef TABLE_METADATA_LOCK_H
24#define TABLE_METADATA_LOCK_H
25
26/**
27 @file storage/perfschema/table_md_locks.h
28 Table METADATA_LOCKS (declarations).
29*/
30
31#include <sys/types.h>
32
33#include "my_base.h"
38
39class Field;
40class Plugin_table;
42struct TABLE;
43struct THR_LOCK;
44
45/**
46 @addtogroup performance_schema_tables
47 @{
48*/
49
50/** A row of table PERFORMANCE_SCHEMA.MUTEX_INSTANCES. */
52 /** Column OBJECT_INSTANCE_BEGIN. */
53 const void *m_identity;
57 /** Column SOURCE. */
59 /** Length in bytes of @c m_source. */
61 /** Column OWNER_THREAD_ID. */
63 /** Column OWNER_EVENT_ID. */
65 /** Columns OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME, COLUMN_NAME. */
67};
68
70 public:
72 : PFS_engine_index(key_1) {}
73
75 : PFS_engine_index(key_1, key_2) {}
76
78 PFS_engine_key *key_3, PFS_engine_key *key_4)
79 : PFS_engine_index(key_1, key_2, key_3, key_4) {}
80
81 ~PFS_index_metadata_locks() override = default;
82
83 virtual bool match(const PFS_metadata_lock *pfs) = 0;
84};
85
87 public:
89 : PFS_index_metadata_locks(&m_key), m_key("OBJECT_INSTANCE_BEGIN") {}
90
92
93 bool match(const PFS_metadata_lock *pfs) override;
94
95 private:
97};
98
100 public:
103 m_key_1("OBJECT_TYPE"),
104 m_key_2("OBJECT_SCHEMA"),
105 m_key_3("OBJECT_NAME"),
106 m_key_4("COLUMN_NAME") {}
107
109
110 bool match(const PFS_metadata_lock *pfs) override;
111
112 private:
117};
118
120 public:
123 m_key_1("OWNER_THREAD_ID"),
124 m_key_2("OWNER_EVENT_ID") {}
125
127
128 bool match(const PFS_metadata_lock *pfs) override;
129
130 private:
133};
134
135/** Table PERFORMANCE_SCHEMA.METADATA_LOCKS. */
137 public:
138 /** Table share. */
141 static ha_rows get_row_count();
142
143 void reset_position(void) override;
144
145 int rnd_next() override;
146 int rnd_pos(const void *pos) override;
147
148 int index_init(uint idx, bool sorted) override;
149 int index_next() override;
150
151 private:
152 int read_row_values(TABLE *table, unsigned char *buf, Field **fields,
153 bool read_all) override;
155
156 public:
157 ~table_metadata_locks() override = default;
158
159 private:
161
162 /** Table share lock. */
164 /** Table definition. */
166
167 /** Current row. */
169 /** Current position. */
171 /** Next position. */
173
174 protected:
176};
177
178/** @} */
179#endif
Definition: field.h:574
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_md_locks.h:86
~PFS_index_metadata_locks_by_instance() override=default
bool match(const PFS_metadata_lock *pfs) override
Definition: table_md_locks.cc:86
PFS_key_object_instance m_key
Definition: table_md_locks.h:96
PFS_index_metadata_locks_by_instance()
Definition: table_md_locks.h:88
Definition: table_md_locks.h:99
PFS_key_object_name m_key_3
Definition: table_md_locks.h:115
PFS_key_object_schema m_key_2
Definition: table_md_locks.h:114
PFS_index_metadata_locks_by_object()
Definition: table_md_locks.h:101
PFS_key_column_name m_key_4
Definition: table_md_locks.h:116
~PFS_index_metadata_locks_by_object() override=default
PFS_key_object_type m_key_1
Definition: table_md_locks.h:113
bool match(const PFS_metadata_lock *pfs) override
Definition: table_md_locks.cc:96
Definition: table_md_locks.h:119
~PFS_index_metadata_locks_by_owner() override=default
bool match(const PFS_metadata_lock *pfs) override
Definition: table_md_locks.cc:130
PFS_index_metadata_locks_by_owner()
Definition: table_md_locks.h:121
PFS_key_thread_id m_key_1
Definition: table_md_locks.h:131
PFS_key_event_id m_key_2
Definition: table_md_locks.h:132
Definition: table_md_locks.h:69
~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:71
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:77
PFS_index_metadata_locks(PFS_engine_key *key_1, PFS_engine_key *key_2)
Definition: table_md_locks.h:74
Definition: table_helper.h:1626
Definition: table_helper.h:1266
Definition: table_helper.h:1673
Definition: table_helper.h:1610
Definition: table_helper.h:1595
Definition: table_helper.h:1635
Definition: table_helper.h:1250
Class to hold information regarding a table to be created on behalf of a plugin.
Definition: plugin_table.h:39
Table PERFORMANCE_SCHEMA.METADATA_LOCKS.
Definition: table_md_locks.h:136
static Plugin_table m_table_def
Table definition.
Definition: table_md_locks.h:165
static PFS_engine_table * create(PFS_engine_table_share *)
Definition: table_md_locks.cc:146
int rnd_next() override
Fetch the next row in this cursor.
Definition: table_md_locks.cc:162
int index_init(uint idx, bool sorted) override
Definition: table_md_locks.cc:189
PFS_index_metadata_locks * m_opened_index
Definition: table_md_locks.h:175
static PFS_engine_table_share m_share
Table share.
Definition: table_md_locks.h:139
static ha_rows get_row_count()
Definition: table_md_locks.cc:150
void reset_position(void) override
Reset the cursor position to the beginning of the table.
Definition: table_md_locks.cc:157
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:261
int index_next() override
Find key in index, read record.
Definition: table_md_locks.cc:212
PFS_simple_index m_pos
Current position.
Definition: table_md_locks.h:170
int rnd_pos(const void *pos) override
Fetch a row by position.
Definition: table_md_locks.cc:176
row_metadata_lock m_row
Current row.
Definition: table_md_locks.h:168
~table_metadata_locks() override=default
int make_row(PFS_metadata_lock *pfs)
Definition: table_md_locks.cc:233
PFS_simple_index m_next_pos
Next position.
Definition: table_md_locks.h:172
table_metadata_locks()
Definition: table_md_locks.cc:154
static THR_LOCK m_table_lock
Table share lock.
Definition: table_md_locks.h:163
char * pos
Definition: do_ctype.cc:76
int opaque_mdl_duration
Definition: psi_mdl_bits.h:41
int opaque_mdl_status
Definition: psi_mdl_bits.h:44
int opaque_mdl_type
Definition: psi_mdl_bits.h:35
This file includes constants used by all storage engines.
my_off_t ha_rows
Definition: my_base.h:1139
Definition: buf0block_hint.cc:29
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:75
Performance schema tables (declarations).
Performance schema instrumentation interface.
static const LEX_CSTRING pfs
Definition: sql_show_processlist.cc:65
Row fragment for columns OBJECT_TYPE, SCHEMA_NAME, OBJECT_NAME, COLUMN_NAME.
Definition: table_helper.h:619
A PERFORMANCE_SCHEMA table share.
Definition: pfs_engine_table.h:357
Instrumented metadata lock implementation.
Definition: pfs_instr.h:315
Position of a cursor, for simple iterations.
Definition: pfs_engine_table.h:558
Definition: table.h:1396
Definition: thr_lock.h:138
A row of table PERFORMANCE_SCHEMA.MUTEX_INSTANCES.
Definition: table_md_locks.h:51
uint m_source_length
Length in bytes of m_source.
Definition: table_md_locks.h:60
ulong m_owner_thread_id
Column OWNER_THREAD_ID.
Definition: table_md_locks.h:62
opaque_mdl_status m_mdl_status
Definition: table_md_locks.h:56
ulong m_owner_event_id
Column OWNER_EVENT_ID.
Definition: table_md_locks.h:64
opaque_mdl_duration m_mdl_duration
Definition: table_md_locks.h:55
PFS_column_row m_object
Columns OBJECT_TYPE, OBJECT_SCHEMA, OBJECT_NAME, COLUMN_NAME.
Definition: table_md_locks.h:66
char m_source[COL_SOURCE_SIZE]
Column SOURCE.
Definition: table_md_locks.h:58
const void * m_identity
Column OBJECT_INSTANCE_BEGIN.
Definition: table_md_locks.h:53
opaque_mdl_type m_mdl_type
Definition: table_md_locks.h:54
Helpers to implement a performance schema table.
unsigned int uint
Definition: uca-dump.cc:29