MySQL 8.0.31
Source Code Documentation
cursor_by_account.h
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23
24#ifndef CURSOR_BY_ACCOUNT_H
25#define CURSOR_BY_ACCOUNT_H
26
27/**
28 @file storage/perfschema/cursor_by_account.h
29 Cursor CURSOR_BY_ACCOUNT (declarations).
30*/
31
35
36/**
37 @addtogroup performance_schema_tables
38 @{
39*/
40
42 public:
44 : PFS_engine_index(key_1) {}
45
47 : PFS_engine_index(key_1, key_2) {}
48
49 ~PFS_index_accounts() override = default;
50
51 virtual bool match(PFS_account *pfs) = 0;
52};
53
54/** Cursor CURSOR_BY_ACCOUNT. */
56 public:
57 static ha_rows get_row_count();
58
59 void reset_position(void) override;
60
61 int rnd_next() override;
62 int rnd_pos(const void *pos) override;
63
64 int index_next() override;
65
66 protected:
67 explicit cursor_by_account(const PFS_engine_table_share *share);
68
69 public:
70 ~cursor_by_account() override = default;
71
72 protected:
73 virtual int make_row(PFS_account *account) = 0;
74
75 private:
76 /** Current position. */
78 /** Next position. */
80
81 protected:
83};
84
85/** @} */
86#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_account.h:41
virtual bool match(PFS_account *pfs)=0
PFS_index_accounts(PFS_engine_key *key_1, PFS_engine_key *key_2)
Definition: cursor_by_account.h:46
~PFS_index_accounts() override=default
PFS_index_accounts(PFS_engine_key *key_1)
Definition: cursor_by_account.h:43
Cursor CURSOR_BY_ACCOUNT.
Definition: cursor_by_account.h:55
int rnd_pos(const void *pos) override
Fetch a row by position.
Definition: cursor_by_account.cc:62
PFS_simple_index m_next_pos
Next position.
Definition: cursor_by_account.h:79
PFS_simple_index m_pos
Current position.
Definition: cursor_by_account.h:77
int index_next() override
Find key in index, read record.
Definition: cursor_by_account.cc:75
cursor_by_account(const PFS_engine_table_share *share)
Definition: cursor_by_account.cc:40
void reset_position(void) override
Reset the cursor position to the beginning of the table.
Definition: cursor_by_account.cc:43
int rnd_next() override
Fetch the next row in this cursor.
Definition: cursor_by_account.cc:48
static ha_rows get_row_count()
Definition: cursor_by_account.cc:36
virtual int make_row(PFS_account *account)=0
~cursor_by_account() override=default
PFS_index_accounts * m_opened_index
Definition: cursor_by_account.h:82
char * pos
Definition: do_ctype.cc:76
my_off_t ha_rows
Definition: my_base.h:1139
Performance schema account (declarations).
Performance schema tables (declarations).
static const LEX_CSTRING pfs
Definition: sql_show_processlist.cc:65
Per account statistics.
Definition: pfs_account.h:66
A PERFORMANCE_SCHEMA table share.
Definition: pfs_engine_table.h:357
Position of a cursor, for simple iterations.
Definition: pfs_engine_table.h:558
Helpers to implement a performance schema table.