1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
|
CREATE TABLE test.v1 (a int, b int);
INSERT INTO test.v1 VALUES (1, 100), (2, 200), (3, 300);
CREATE TABLE test.t1 (a int, b int);
INSERT INTO test.t1 VALUES (1, 100), (2, 200), (3, 300);
TRUNCATE TABLE performance_schema.events_statements_summary_by_digest;
EXPLAIN EXTENDED SELECT * from test.v1;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE v1 ALL NULL NULL NULL NULL 3 100.00
Warnings:
Note 1003 select `test`.`v1`.`a` AS `a`,`test`.`v1`.`b` AS `b` from `test`.`v1`
EXPLAIN EXTENDED SELECT * from test.v1 where a = 1;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE v1 ALL NULL NULL NULL NULL 3 100.00 Using where
Warnings:
Note 1003 select `test`.`v1`.`a` AS `a`,`test`.`v1`.`b` AS `b` from `test`.`v1` where `test`.`v1`.`a` = 1
EXPLAIN EXTENDED SELECT * from test.v1 where b > 100;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE v1 ALL NULL NULL NULL NULL 3 100.00 Using where
Warnings:
Note 1003 select `test`.`v1`.`a` AS `a`,`test`.`v1`.`b` AS `b` from `test`.`v1` where `test`.`v1`.`b` > 100
EXPLAIN EXTENDED SELECT a, b from test.v1;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE v1 ALL NULL NULL NULL NULL 3 100.00
Warnings:
Note 1003 select `test`.`v1`.`a` AS `a`,`test`.`v1`.`b` AS `b` from `test`.`v1`
EXPLAIN EXTENDED SELECT b, a from test.v1;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE v1 ALL NULL NULL NULL NULL 3 100.00
Warnings:
Note 1003 select `test`.`v1`.`b` AS `b`,`test`.`v1`.`a` AS `a` from `test`.`v1`
SELECT * from test.v1;
a b
1 100
2 200
3 300
SELECT * from test.v1 where a = 1;
a b
1 100
SELECT * from test.v1 where b > 100;
a b
2 200
3 300
SELECT a, b from test.v1;
a b
1 100
2 200
3 300
SELECT b, a from test.v1;
b a
100 1
200 2
300 3
#
# DIGESTS SEEN ON TABLE
#
SELECT SCHEMA_NAME, DIGEST_TEXT, COUNT_STAR
FROM performance_schema.events_statements_summary_by_digest
ORDER BY DIGEST_TEXT;
SCHEMA_NAME DIGEST_TEXT COUNT_STAR
test EXPLAIN EXTENDED SELECT * FROM `test` . `v1` 1
test EXPLAIN EXTENDED SELECT * FROM `test` . `v1` WHERE `a` = ? 1
test EXPLAIN EXTENDED SELECT * FROM `test` . `v1` WHERE `b` > ? 1
test EXPLAIN EXTENDED SELECT `a` , `b` FROM `test` . `v1` 1
test EXPLAIN EXTENDED SELECT `b` , `a` FROM `test` . `v1` 1
test SELECT * FROM `test` . `v1` 1
test SELECT * FROM `test` . `v1` WHERE `a` = ? 1
test SELECT * FROM `test` . `v1` WHERE `b` > ? 1
test SELECT `a` , `b` FROM `test` . `v1` 1
test SELECT `b` , `a` FROM `test` . `v1` 1
test SHOW WARNINGS 5
test TRUNCATE TABLE `performance_schema` . `events_statements_summary_by_digest` 1
DROP TABLE test.v1;
CREATE VIEW test.v1 AS SELECT * FROM test.t1;
EXPLAIN EXTENDED SELECT * from test.v1;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1`
EXPLAIN EXTENDED SELECT * from test.v1 where a = 1;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where `test`.`t1`.`a` = 1
EXPLAIN EXTENDED SELECT * from test.v1 where b > 100;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where `test`.`t1`.`b` > 100
EXPLAIN EXTENDED SELECT a, b from test.v1;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1`
EXPLAIN EXTENDED SELECT b, a from test.v1;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00
Warnings:
Note 1003 select `test`.`t1`.`b` AS `b`,`test`.`t1`.`a` AS `a` from `test`.`t1`
SELECT * from test.v1;
a b
1 100
2 200
3 300
SELECT * from test.v1 where a = 1;
a b
1 100
SELECT * from test.v1 where b > 100;
a b
2 200
3 300
SELECT a, b from test.v1;
a b
1 100
2 200
3 300
SELECT b, a from test.v1;
b a
100 1
200 2
300 3
#
# DIGESTS SEEN ON VIEW
#
SELECT SCHEMA_NAME, DIGEST_TEXT, COUNT_STAR
FROM performance_schema.events_statements_summary_by_digest
ORDER BY DIGEST_TEXT;
SCHEMA_NAME DIGEST_TEXT COUNT_STAR
test CREATE VIEW `test` . `v1` AS SELECT * FROM `test` . `t1` 1
test DROP TABLE `test` . `v1` 1
test EXPLAIN EXTENDED SELECT * FROM `test` . `v1` 2
test EXPLAIN EXTENDED SELECT * FROM `test` . `v1` WHERE `a` = ? 2
test EXPLAIN EXTENDED SELECT * FROM `test` . `v1` WHERE `b` > ? 2
test EXPLAIN EXTENDED SELECT `a` , `b` FROM `test` . `v1` 2
test EXPLAIN EXTENDED SELECT `b` , `a` FROM `test` . `v1` 2
test SELECT * FROM `test` . `v1` 2
test SELECT * FROM `test` . `v1` WHERE `a` = ? 2
test SELECT * FROM `test` . `v1` WHERE `b` > ? 2
test SELECT SCHEMA_NAME , `DIGEST_TEXT` , `COUNT_STAR` FROM `performance_schema` . `events_statements_summary_by_digest` ORDER BY `DIGEST_TEXT` 1
test SELECT `a` , `b` FROM `test` . `v1` 2
test SELECT `b` , `a` FROM `test` . `v1` 2
test SHOW WARNINGS 10
test TRUNCATE TABLE `performance_schema` . `events_statements_summary_by_digest` 1
DROP VIEW test.v1;
DROP TABLE test.t1;
CREATE TABLE test.v1 (a int, b int);
INSERT INTO test.v1 VALUES (1, 100), (2, 200), (3, 300);
CREATE TABLE test.t1 (a int, b int);
INSERT INTO test.t1 VALUES (1, 100), (2, 200), (3, 300);
TRUNCATE TABLE performance_schema.events_statements_summary_by_digest;
EXPLAIN SELECT * from test.v1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE v1 ALL NULL NULL NULL NULL 3
EXPLAIN SELECT * from test.v1 where a = 1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE v1 ALL NULL NULL NULL NULL 3 Using where
EXPLAIN SELECT * from test.v1 where b > 100;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE v1 ALL NULL NULL NULL NULL 3 Using where
EXPLAIN SELECT a, b from test.v1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE v1 ALL NULL NULL NULL NULL 3
EXPLAIN SELECT b, a from test.v1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE v1 ALL NULL NULL NULL NULL 3
SELECT * from test.v1;
a b
1 100
2 200
3 300
SELECT * from test.v1 where a = 1;
a b
1 100
SELECT * from test.v1 where b > 100;
a b
2 200
3 300
SELECT a, b from test.v1;
a b
1 100
2 200
3 300
SELECT b, a from test.v1;
b a
100 1
200 2
300 3
#
# DIGESTS SEEN ON TABLE
#
SELECT SCHEMA_NAME, DIGEST, DIGEST_TEXT, COUNT_STAR
FROM performance_schema.events_statements_summary_by_digest
ORDER BY DIGEST_TEXT;
SCHEMA_NAME DIGEST DIGEST_TEXT COUNT_STAR
test e0c034ab2f0273695ef8b19babc4bd32 EXPLAIN SELECT * FROM `test` . `v1` 1
test 751b8637d21a37ff572c84fdf1574e51 EXPLAIN SELECT * FROM `test` . `v1` WHERE `a` = ? 1
test 93ceaf1395bcc52bfc3ec4d6ec817616 EXPLAIN SELECT * FROM `test` . `v1` WHERE `b` > ? 1
test 51a9abceb7c8cebe749a4a07f7f40169 EXPLAIN SELECT `a` , `b` FROM `test` . `v1` 1
test 8df4eaa7c85bdd4fffa6920137c3072a EXPLAIN SELECT `b` , `a` FROM `test` . `v1` 1
test 7ada999dc73fa2ec7f721e5c8e124e7f SELECT * FROM `test` . `v1` 1
test 1efd67df2b28ac47a49938d56094c8c4 SELECT * FROM `test` . `v1` WHERE `a` = ? 1
test 9107a99dc94a65bd4d1c92756c2b60a6 SELECT * FROM `test` . `v1` WHERE `b` > ? 1
test c25e5077415cf620b64c739153ce015b SELECT `a` , `b` FROM `test` . `v1` 1
test 9b06d26cce3a78277e5d3b7abbfa7f3e SELECT `b` , `a` FROM `test` . `v1` 1
test e7f13e133e0bda19894df88606c37ec3 TRUNCATE TABLE `performance_schema` . `events_statements_summary_by_digest` 1
DROP TABLE test.v1;
CREATE VIEW test.v1 AS SELECT * FROM test.t1;
EXPLAIN SELECT * from test.v1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
EXPLAIN SELECT * from test.v1 where a = 1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where
EXPLAIN SELECT * from test.v1 where b > 100;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using where
EXPLAIN SELECT a, b from test.v1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
EXPLAIN SELECT b, a from test.v1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
SELECT * from test.v1;
a b
1 100
2 200
3 300
SELECT * from test.v1 where a = 1;
a b
1 100
SELECT * from test.v1 where b > 100;
a b
2 200
3 300
SELECT a, b from test.v1;
a b
1 100
2 200
3 300
SELECT b, a from test.v1;
b a
100 1
200 2
300 3
#
# DIGESTS SEEN ON VIEW
#
SELECT SCHEMA_NAME, DIGEST, DIGEST_TEXT, COUNT_STAR
FROM performance_schema.events_statements_summary_by_digest
ORDER BY DIGEST_TEXT;
SCHEMA_NAME DIGEST DIGEST_TEXT COUNT_STAR
test f584090c72167285107217a72a0b3060 CREATE VIEW `test` . `v1` AS SELECT * FROM `test` . `t1` 1
test 67a106b8a88c2880c3455f1c7fa0a4aa DROP TABLE `test` . `v1` 1
test e0c034ab2f0273695ef8b19babc4bd32 EXPLAIN SELECT * FROM `test` . `v1` 2
test 751b8637d21a37ff572c84fdf1574e51 EXPLAIN SELECT * FROM `test` . `v1` WHERE `a` = ? 2
test 93ceaf1395bcc52bfc3ec4d6ec817616 EXPLAIN SELECT * FROM `test` . `v1` WHERE `b` > ? 2
test 51a9abceb7c8cebe749a4a07f7f40169 EXPLAIN SELECT `a` , `b` FROM `test` . `v1` 2
test 8df4eaa7c85bdd4fffa6920137c3072a EXPLAIN SELECT `b` , `a` FROM `test` . `v1` 2
test 7ada999dc73fa2ec7f721e5c8e124e7f SELECT * FROM `test` . `v1` 2
test 1efd67df2b28ac47a49938d56094c8c4 SELECT * FROM `test` . `v1` WHERE `a` = ? 2
test 9107a99dc94a65bd4d1c92756c2b60a6 SELECT * FROM `test` . `v1` WHERE `b` > ? 2
test 375cc5223952495534c4034549d813e2 SELECT SCHEMA_NAME , `DIGEST` , `DIGEST_TEXT` , `COUNT_STAR` FROM `performance_schema` . `events_statements_summary_by_digest` ORDER BY `DIGEST_TEXT` 1
test c25e5077415cf620b64c739153ce015b SELECT `a` , `b` FROM `test` . `v1` 2
test 9b06d26cce3a78277e5d3b7abbfa7f3e SELECT `b` , `a` FROM `test` . `v1` 2
test e7f13e133e0bda19894df88606c37ec3 TRUNCATE TABLE `performance_schema` . `events_statements_summary_by_digest` 1
DROP VIEW test.v1;
DROP TABLE test.t1;
|
