MySQL 8.0.31
Source Code Documentation
cursor_by_user.h
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23
24#ifndef CURSOR_BY_USER_H
25#define CURSOR_BY_USER_H
26
27/**
28 @file storage/perfschema/cursor_by_user.h
29 Cursor CURSOR_BY_USER (declarations).
30*/
31
35
36/**
37 @addtogroup performance_schema_tables
38 @{
39*/
40
42 public:
43 explicit PFS_index_users(PFS_engine_key *key_1) : PFS_engine_index(key_1) {}
44
45 ~PFS_index_users() override = default;
46
47 virtual bool match(PFS_user *pfs) = 0;
48};
49
50/** Cursor CURSOR_BY_USER. */
52 public:
53 static ha_rows get_row_count();
54
55 void reset_position(void) override;
56
57 int rnd_next() override;
58 int rnd_pos(const void *pos) override;
59
60 int index_next() override;
61
62 protected:
63 explicit cursor_by_user(const PFS_engine_table_share *share);
64
65 public:
66 ~cursor_by_user() override = default;
67
68 protected:
69 virtual int make_row(PFS_user *user) = 0;
70
71 private:
72 /** Current position. */
74 /** Next position. */
76
77 protected:
79};
80
81/** @} */
82#endif
Definition: pfs_engine_table.h:299
Definition: pfs_engine_table.h:267
An abstract PERFORMANCE_SCHEMA table.
Definition: pfs_engine_table.h:69
Definition: cursor_by_user.h:41
virtual bool match(PFS_user *pfs)=0
PFS_index_users(PFS_engine_key *key_1)
Definition: cursor_by_user.h:43
~PFS_index_users() override=default
Cursor CURSOR_BY_USER.
Definition: cursor_by_user.h:51
PFS_simple_index m_pos
Current position.
Definition: cursor_by_user.h:73
void reset_position(void) override
Reset the cursor position to the beginning of the table.
Definition: cursor_by_user.cc:42
int index_next() override
Find key in index, read record.
Definition: cursor_by_user.cc:74
PFS_index_users * m_opened_index
Definition: cursor_by_user.h:78
PFS_simple_index m_next_pos
Next position.
Definition: cursor_by_user.h:75
static ha_rows get_row_count()
Definition: cursor_by_user.cc:35
int rnd_pos(const void *pos) override
Fetch a row by position.
Definition: cursor_by_user.cc:61
cursor_by_user(const PFS_engine_table_share *share)
Definition: cursor_by_user.cc:39
int rnd_next() override
Fetch the next row in this cursor.
Definition: cursor_by_user.cc:47
~cursor_by_user() override=default
virtual int make_row(PFS_user *user)=0
char * pos
Definition: do_ctype.cc:76
my_off_t ha_rows
Definition: my_base.h:1139
char * user
Definition: mysqladmin.cc:59
Performance schema tables (declarations).
Performance schema user (declarations).
static const LEX_CSTRING pfs
Definition: sql_show_processlist.cc:65
A PERFORMANCE_SCHEMA table share.
Definition: pfs_engine_table.h:357
Position of a cursor, for simple iterations.
Definition: pfs_engine_table.h:558
Per user statistics.
Definition: pfs_user.h:62
Helpers to implement a performance schema table.