MySQL 8.0.31
Source Code Documentation
table_esmh_by_digest.h
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23
24#ifndef TABLE_ESMH_BY_DIGEST_H
25#define TABLE_ESMH_BY_DIGEST_H
26
27/**
28 @file storage/perfschema/table_esmh_by_digest.h
29 Table EVENTS_STATEMENTS_HISTOGRAM_BY_DIGEST (declarations).
30*/
31
34
35/**
36 @addtogroup performance_schema_tables
37 @{
38*/
39
40/**
41 Position of a cursor on
42 PERFORMANCE_SCHEMA.EVENTS_STATEMENTS_HISTOGRAM_BY_DIGEST.
43 Index 1 on digest array (0 based).
44 Index 2 on buckets (0 based).
45*/
48
49 inline void reset(void) {
50 m_index_1 = 0;
51 m_index_2 = 0;
52 }
53
54 inline bool has_more_digest(void) { return (m_index_1 < digest_max); }
55
56 inline void next_digest(void) {
57 m_index_1++;
58 m_index_2 = 0;
59 }
60
61 inline bool has_more_buckets(void) { return (m_index_2 < NUMBER_OF_BUCKETS); }
62
63 inline void next_bucket(void) { m_index_2++; }
64};
65
67 public:
70 m_key_1("SCHEMA_NAME"),
71 m_key_2("DIGEST"),
72 m_key_3("BUCKET_NUMBER") {}
73
74 ~PFS_index_esmh_by_digest() override = default;
75
77 bool match_bucket(ulong bucket_index);
78
79 private:
83};
84
85/**
86 A row of table
87 PERFORMANCE_SCHEMA.EVENTS_STATEMENTS_HISTOGRAM_BY_DIGEST.
88*/
89
91 /** Column COUNT_BUCKET. */
93 /** Column COUNT_BUCKET_AND_LOWER. */
95};
96
98 /** Columns SCHEMA_NAME, DIGEST. */
100
101 /** Statistics for all buckets. */
103};
104
106 /*
107 No need to repeat SCHEMA_NAME, DIGEST here,
108 only materialize the parts of the row that changes per bucket.
109 */
110 /** Column BUCKET_NUMBER. */
112 /** Column BUCKET_TIMER_LOW. */
114 /** Column BUCKET_TIMER_HIGH. */
116 /** Column COUNT_BUCKET. */
118 /** Column COUNT_BUCKET_AND_LOWER. */
120 /** Column BUCKET_QUANTILE. */
122};
123
124/** Table PERFORMANCE_SCHEMA.EVENTS_STATEMENTS_HISTOGRAM_BY_DIGEST. */
127
128 public:
129 /** Table share */
132 static int delete_all_rows();
133 static ha_rows get_row_count();
134
135 void reset_position(void) override;
136
137 int rnd_next() override;
138 int rnd_pos(const void *pos) override;
139
140 int index_init(uint idx, bool sorted) override;
141 int index_next() override;
142
143 protected:
144 int read_row_values(TABLE *table, unsigned char *buf, Field **fields,
145 bool read_all) override;
146
148
149 public:
150 ~table_esmh_by_digest() override = default;
151
152 protected:
154 int make_row(PFS_statements_digest_stat *stat, ulong bucket_index);
155
156 private:
157 /** Table share lock. */
159 /** Table definition. */
161
162 /** Current row. */
166 /** Current position. */
168 /** Next position. */
170
172};
173
174/** @} */
175#endif
Definition: field.h:574
Definition: pfs_engine_table.h:299
An abstract PERFORMANCE_SCHEMA table.
Definition: pfs_engine_table.h:69
Definition: table_esmh_by_digest.h:66
PFS_index_esmh_by_digest()
Definition: table_esmh_by_digest.h:68
bool match_bucket(ulong bucket_index)
Definition: table_esmh_by_digest.cc:95
PFS_key_bucket_number m_key_3
Definition: table_esmh_by_digest.h:82
bool match_digest(PFS_statements_digest_stat *pfs)
Definition: table_esmh_by_digest.cc:81
~PFS_index_esmh_by_digest() override=default
PFS_key_digest m_key_2
Definition: table_esmh_by_digest.h:81
PFS_key_schema m_key_1
Definition: table_esmh_by_digest.h:80
Definition: table_helper.h:1498
Definition: table_helper.h:1489
Definition: table_helper.h:1480
Class to hold information regarding a table to be created on behalf of a plugin.
Definition: plugin_table.h:39
Table PERFORMANCE_SCHEMA.EVENTS_STATEMENTS_HISTOGRAM_BY_DIGEST.
Definition: table_esmh_by_digest.h:125
void reset_position(void) override
Reset the cursor position to the beginning of the table.
Definition: table_esmh_by_digest.cc:120
pos_esmh_by_digest pos_t
Definition: table_esmh_by_digest.h:126
int read_row_values(TABLE *table, unsigned char *buf, Field **fields, bool read_all) override
Read the current row values.
Definition: table_esmh_by_digest.cc:265
int index_next() override
Find key in index, read record.
Definition: table_esmh_by_digest.cc:177
PFS_esmh_by_digest_histogram m_materialized_histogram
Definition: table_esmh_by_digest.h:164
int rnd_pos(const void *pos) override
Fetch a row by position.
Definition: table_esmh_by_digest.cc:149
int rnd_next() override
Fetch the next row in this cursor.
Definition: table_esmh_by_digest.cc:125
table_esmh_by_digest()
Definition: table_esmh_by_digest.cc:114
PFS_index_esmh_by_digest * m_opened_index
Definition: table_esmh_by_digest.h:171
void materialize(PFS_statements_digest_stat *stat)
Definition: table_esmh_by_digest.cc:207
static ha_rows get_row_count()
Definition: table_esmh_by_digest.cc:112
PFS_statements_digest_stat * m_materialized_digest
Current row.
Definition: table_esmh_by_digest.h:163
static THR_LOCK m_table_lock
Table share lock.
Definition: table_esmh_by_digest.h:158
static PFS_engine_table_share m_share
Table share.
Definition: table_esmh_by_digest.h:130
~table_esmh_by_digest() override=default
row_esmh_by_digest m_row
Definition: table_esmh_by_digest.h:165
static int delete_all_rows()
Definition: table_esmh_by_digest.cc:107
static PFS_engine_table * create(PFS_engine_table_share *)
Definition: table_esmh_by_digest.cc:103
pos_t m_pos
Current position.
Definition: table_esmh_by_digest.h:167
int index_init(uint idx, bool sorted) override
Definition: table_esmh_by_digest.cc:168
int make_row(PFS_statements_digest_stat *stat, ulong bucket_index)
Definition: table_esmh_by_digest.cc:233
static Plugin_table m_table_def
Table definition.
Definition: table_esmh_by_digest.h:160
pos_t m_next_pos
Next position.
Definition: table_esmh_by_digest.h:169
char * pos
Definition: do_ctype.cc:76
my_off_t ha_rows
Definition: my_base.h:1139
unsigned long long int ulonglong
Definition: my_inttypes.h:55
Definition: buf0block_hint.cc:29
size_t digest_max
Definition: pfs_digest.cc:50
Statement Digest data structures (declarations).
#define NUMBER_OF_BUCKETS
Number of buckets used in histograms.
Definition: pfs_histogram.h:35
static const LEX_CSTRING pfs
Definition: sql_show_processlist.cc:65
Row fragment for columns DIGEST, DIGEST_TEXT.
Definition: table_helper.h:564
Position of a double cursor, for iterations using 2 nested loops.
Definition: pfs_engine_table.h:593
uint m_index_1
Outer index.
Definition: pfs_engine_table.h:595
uint m_index_2
Current index within index_1.
Definition: pfs_engine_table.h:597
A PERFORMANCE_SCHEMA table share.
Definition: pfs_engine_table.h:357
A row of table PERFORMANCE_SCHEMA.EVENTS_STATEMENTS_HISTOGRAM_BY_DIGEST.
Definition: table_esmh_by_digest.h:90
ulonglong m_count_bucket
Column COUNT_BUCKET.
Definition: table_esmh_by_digest.h:92
ulonglong m_count_bucket_and_lower
Column COUNT_BUCKET_AND_LOWER.
Definition: table_esmh_by_digest.h:94
Definition: table_esmh_by_digest.h:97
PFS_esmh_by_digest_bucket m_buckets[NUMBER_OF_BUCKETS]
Statistics for all buckets.
Definition: table_esmh_by_digest.h:102
PFS_digest_row m_digest
Columns SCHEMA_NAME, DIGEST.
Definition: table_esmh_by_digest.h:99
A statement digest stat record.
Definition: pfs_digest.h:58
Definition: table.h:1396
Definition: thr_lock.h:138
Position of a cursor on PERFORMANCE_SCHEMA.EVENTS_STATEMENTS_HISTOGRAM_BY_DIGEST.
Definition: table_esmh_by_digest.h:46
pos_esmh_by_digest()
Definition: table_esmh_by_digest.h:47
void reset(void)
Definition: table_esmh_by_digest.h:49
void next_digest(void)
Definition: table_esmh_by_digest.h:56
void next_bucket(void)
Definition: table_esmh_by_digest.h:63
bool has_more_digest(void)
Definition: table_esmh_by_digest.h:54
bool has_more_buckets(void)
Definition: table_esmh_by_digest.h:61
Definition: table_esmh_by_digest.h:105
ulonglong m_count_bucket_and_lower
Column COUNT_BUCKET_AND_LOWER.
Definition: table_esmh_by_digest.h:119
ulong m_bucket_number
Column BUCKET_NUMBER.
Definition: table_esmh_by_digest.h:111
ulonglong m_bucket_timer_low
Column BUCKET_TIMER_LOW.
Definition: table_esmh_by_digest.h:113
ulonglong m_bucket_timer_high
Column BUCKET_TIMER_HIGH.
Definition: table_esmh_by_digest.h:115
double m_percentile
Column BUCKET_QUANTILE.
Definition: table_esmh_by_digest.h:121
ulonglong m_count_bucket
Column COUNT_BUCKET.
Definition: table_esmh_by_digest.h:117
Helpers to implement a performance schema table.
unsigned int uint
Definition: uca-dump.cc:29