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 325a5266eeb07f609043730630a54f62 EXPLAIN SELECT * FROM `test` . `v1` 1
test e860d6b0816b2b4854badd34fbbd6207 EXPLAIN SELECT * FROM `test` . `v1` WHERE `a` = ? 1
test d162188aba15f30fbad441adcd8d96af EXPLAIN SELECT * FROM `test` . `v1` WHERE `b` > ? 1
test b22e464e9cc580f0e67bfdd65f11402b EXPLAIN SELECT `a` , `b` FROM `test` . `v1` 1
test ccb1e6631108bba01e42d1755e32399d EXPLAIN SELECT `b` , `a` FROM `test` . `v1` 1
test ef05c6bd2efecfe1635b58ffc118cabd SELECT * FROM `test` . `v1` 1
test 7755326c5700a225c95f470c1a909f21 SELECT * FROM `test` . `v1` WHERE `a` = ? 1
test aa8bcfc412f56c41fbe6161b2a3a971c SELECT * FROM `test` . `v1` WHERE `b` > ? 1
test 5ea7548b0f49730b2c419ff6a94a3f09 SELECT `a` , `b` FROM `test` . `v1` 1
test 30756ef4e5a36c461ba9bdce676b9811 SELECT `b` , `a` FROM `test` . `v1` 1
test 61e13f96828d862446f5e8ee1cade61d 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 04aae3c6f9b3d3394fbea32dd201320a CREATE VIEW `test` . `v1` AS SELECT * FROM `test` . `t1` 1
test e551faf16ae3ffe7aeb6d923c8f97452 DROP TABLE `test` . `v1` 1
test 325a5266eeb07f609043730630a54f62 EXPLAIN SELECT * FROM `test` . `v1` 2
test e860d6b0816b2b4854badd34fbbd6207 EXPLAIN SELECT * FROM `test` . `v1` WHERE `a` = ? 2
test d162188aba15f30fbad441adcd8d96af EXPLAIN SELECT * FROM `test` . `v1` WHERE `b` > ? 2
test b22e464e9cc580f0e67bfdd65f11402b EXPLAIN SELECT `a` , `b` FROM `test` . `v1` 2
test ccb1e6631108bba01e42d1755e32399d EXPLAIN SELECT `b` , `a` FROM `test` . `v1` 2
test ef05c6bd2efecfe1635b58ffc118cabd SELECT * FROM `test` . `v1` 2
test 7755326c5700a225c95f470c1a909f21 SELECT * FROM `test` . `v1` WHERE `a` = ? 2
test aa8bcfc412f56c41fbe6161b2a3a971c SELECT * FROM `test` . `v1` WHERE `b` > ? 2
test 9b3c3d8a2f8b2d9775f9d87d0932e5b5 SELECT SCHEMA_NAME , `DIGEST` , `DIGEST_TEXT` , `COUNT_STAR` FROM `performance_schema` . `events_statements_summary_by_digest` ORDER BY `DIGEST_TEXT` 1
test 5ea7548b0f49730b2c419ff6a94a3f09 SELECT `a` , `b` FROM `test` . `v1` 2
test 30756ef4e5a36c461ba9bdce676b9811 SELECT `b` , `a` FROM `test` . `v1` 2
test 61e13f96828d862446f5e8ee1cade61d TRUNCATE TABLE `performance_schema` . `events_statements_summary_by_digest` 1
DROP VIEW test.v1;
DROP TABLE test.t1;
|
