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
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
|
create database db1;
use db1;
create table t1(a int);
insert into t1 values (1),(2),(3);
create table t2(a int);
CREATE USER 'foo'@'%';
CREATE USER 'bar'@'%';
create definer=foo SQL SECURITY definer view db1.v1 as select * from db1.t1;
create definer=foo function f1 (a int) returns INT SQL SECURITY DEFINER
BEGIN
insert into t2 select * from t1;
return a+1;
END|
set optimizer_trace="enabled=on";
select * from db1.t1;
ERROR 42000: SELECT command denied to user 'foo'@'localhost' for table `db1`.`t1`
select * from information_schema.OPTIMIZER_TRACE;
QUERY TRACE MISSING_BYTES_BEYOND_MAX_MEM_SIZE INSUFFICIENT_PRIVILEGES
0 1
set optimizer_trace="enabled=off";
grant select(a) on db1.t1 to 'foo'@'%';
set optimizer_trace="enabled=on";
select * from db1.t1;
a
1
2
3
# INSUFFICIENT PRIVILEGES should be set to 1
# Trace and Query should be empty
# We need SELECT privilege on the table db1.t1;
select * from information_schema.OPTIMIZER_TRACE;
QUERY TRACE MISSING_BYTES_BEYOND_MAX_MEM_SIZE INSUFFICIENT_PRIVILEGES
0 1
set optimizer_trace="enabled=off";
select * from information_schema.OPTIMIZER_TRACE;
QUERY TRACE MISSING_BYTES_BEYOND_MAX_MEM_SIZE INSUFFICIENT_PRIVILEGES
grant select on db1.t1 to 'foo'@'%';
grant select on db1.t2 to 'foo'@'%';
set optimizer_trace="enabled=on";
#
# SELECT privilege on the table db1.t1
# The trace would be present.
#
select * from db1.t1;
a
1
2
3
select * from information_schema.OPTIMIZER_TRACE;
QUERY TRACE MISSING_BYTES_BEYOND_MAX_MEM_SIZE INSUFFICIENT_PRIVILEGES
select * from db1.t1 {
"steps": [
{
"join_preparation": {
"select_id": 1,
"steps": [
{
"expanded_query": "select db1.t1.a AS a from t1"
}
]
}
},
{
"join_optimization": {
"select_id": 1,
"steps": [
{
"table_dependencies": [
{
"table": "t1",
"row_may_be_null": false,
"map_bit": 0,
"depends_on_map_bits": []
}
]
},
{
"rows_estimation": [
{
"table": "t1",
"table_scan": {
"rows": 3,
"cost": 2.005126953
}
}
]
},
{
"considered_execution_plans": [
{
"plan_prefix": [],
"get_costs_for_tables": [
{
"best_access_path": {
"table": "t1",
"considered_access_paths": [
{
"access_type": "scan",
"resulting_rows": 3,
"cost": 2.005126953,
"chosen": true
}
],
"chosen_access_method": {
"type": "scan",
"records": 3,
"cost": 2.005126953,
"uses_join_buffering": false
}
}
}
]
},
{
"plan_prefix": [],
"table": "t1",
"rows_for_plan": 3,
"cost_for_plan": 2.605126953
}
]
},
{
"best_join_order": ["t1"]
},
{
"attaching_conditions_to_tables": {
"attached_conditions_computation": [],
"attached_conditions_summary": [
{
"table": "t1",
"attached": null
}
]
}
}
]
}
},
{
"join_execution": {
"select_id": 1,
"steps": []
}
}
]
} 0 0
set optimizer_trace="enabled=off";
grant select on db1.v1 to 'foo'@'%';
grant show view on db1.v1 to 'foo'@'%';
grant select on db1.v1 to 'bar'@'%';
grant show view on db1.v1 to 'bar'@'%';
select current_user();
current_user()
foo@%
set optimizer_trace="enabled=on";
select * from db1.v1;
a
1
2
3
select * from information_schema.OPTIMIZER_TRACE;
QUERY TRACE MISSING_BYTES_BEYOND_MAX_MEM_SIZE INSUFFICIENT_PRIVILEGES
select * from db1.v1 {
"steps": [
{
"join_preparation": {
"select_id": 1,
"steps": [
{
"view": {
"table": "v1",
"select_id": 2,
"algorithm": "merged"
}
},
{
"join_preparation": {
"select_id": 2,
"steps": [
{
"expanded_query": "/* select#2 */ select db1.t1.a AS a from t1"
}
]
}
},
{
"expanded_query": "/* select#1 */ select db1.t1.a AS a from v1"
}
]
}
},
{
"join_optimization": {
"select_id": 1,
"steps": [
{
"table_dependencies": [
{
"table": "t1",
"row_may_be_null": false,
"map_bit": 0,
"depends_on_map_bits": []
}
]
},
{
"rows_estimation": [
{
"table": "t1",
"table_scan": {
"rows": 3,
"cost": 2.005126953
}
}
]
},
{
"considered_execution_plans": [
{
"plan_prefix": [],
"get_costs_for_tables": [
{
"best_access_path": {
"table": "t1",
"considered_access_paths": [
{
"access_type": "scan",
"resulting_rows": 3,
"cost": 2.005126953,
"chosen": true
}
],
"chosen_access_method": {
"type": "scan",
"records": 3,
"cost": 2.005126953,
"uses_join_buffering": false
}
}
}
]
},
{
"plan_prefix": [],
"table": "t1",
"rows_for_plan": 3,
"cost_for_plan": 2.605126953
}
]
},
{
"best_join_order": ["t1"]
},
{
"attaching_conditions_to_tables": {
"attached_conditions_computation": [],
"attached_conditions_summary": [
{
"table": "t1",
"attached": null
}
]
}
}
]
}
},
{
"join_execution": {
"select_id": 1,
"steps": []
}
}
]
} 0 0
set optimizer_trace="enabled=off";
select current_user();
current_user()
bar@%
set optimizer_trace="enabled=on";
select * from db1.v1;
a
1
2
3
#
# INSUFFICIENT PRIVILEGES should be set to 1
# Trace and Query should be empty
# Privileges for the underlying tables of the
# view should also be present for the current user
#
select * from information_schema.OPTIMIZER_TRACE;
QUERY TRACE MISSING_BYTES_BEYOND_MAX_MEM_SIZE INSUFFICIENT_PRIVILEGES
0 1
set optimizer_trace="enabled=off";
grant execute on function db1.f1 to 'foo'@'%';
grant execute on function db1.f1 to 'bar'@'%';
grant select on db1.t1 to 'bar'@'%';
grant insert on db1.t2 to 'foo'@'%';
select current_user();
current_user()
foo@%
set optimizer_trace="enabled=on";
select db1.f1(a) from db1.t1;
db1.f1(a)
2
3
4
select INSUFFICIENT_PRIVILEGES from information_schema.OPTIMIZER_TRACE;
INSUFFICIENT_PRIVILEGES
0
set optimizer_trace="enabled=off";
select current_user();
current_user()
bar@%
set optimizer_trace="enabled=on";
#
# The trace should be empty, because the current user
# does not have INSERT privilege for table t2 which is
# used in the function f1
#
select db1.f1(a) from db1.t1;
db1.f1(a)
2
3
4
select * from information_schema.OPTIMIZER_TRACE;
QUERY TRACE MISSING_BYTES_BEYOND_MAX_MEM_SIZE INSUFFICIENT_PRIVILEGES
0 1
set optimizer_trace="enabled=off";
select current_user();
current_user()
root@localhost
REVOKE ALL PRIVILEGES, GRANT OPTION FROM foo;
drop user if exists foo;
drop user if exists bar;
drop table db1.t1, db1.t2;
drop database db1;
#
# Privilege checking for optimizer trace across connections
#
connection default;
create database db1;
use db1;
create table t1(a int);
insert into t1 values (1),(2),(3);
create table t2(a int);
CREATE USER 'foo'@'localhost';
CREATE USER 'bar'@'localhost';
grant all on *.* to foo@localhost with grant option;
grant all on *.* to bar@localhost with grant option;
connect con_foo,localhost, foo,, db1;
connection default;
connect con_bar,localhost, bar,, db1;
connection default;
create definer=foo@localhost SQL SECURITY definer view db1.v1 as select * from db1.t1;
create function f1 (a int) returns INT SQL SECURITY DEFINER
BEGIN
insert into t2 select * from t1;
return a+1;
END|
grant execute on function f1 to bar@localhost;
connection con_foo;
set optimizer_trace='enabled=on';
select * from db1.t1;
a
1
2
3
#
# Test that security context changes are allowed when, and only
# when, invoker has all global privileges.
#
select query, INSUFFICIENT_PRIVILEGES from information_schema.OPTIMIZER_TRACE;
query INSUFFICIENT_PRIVILEGES
select * from db1.t1 0
set optimizer_trace='enabled=off';
connection con_bar;
set optimizer_trace='enabled=on';
select f1(a) from db1.t1;
f1(a)
2
3
4
select query, INSUFFICIENT_PRIVILEGES from information_schema.OPTIMIZER_TRACE;
query INSUFFICIENT_PRIVILEGES
select f1(a) from db1.t1 0
set optimizer_trace='enabled=off';
connection default;
revoke shutdown on *.* from foo@localhost;
disconnect con_foo;
connect con_foo, localhost, foo,, db1;
connection con_foo;
set optimizer_trace='enabled=on';
select f1(a) from db1.t1;
f1(a)
2
3
4
#
# Test to check if invoker has all global privileges or not, only then
# the security context changes are allowed. The user has been revoked
# shutdown privilege so INSUFFICIENT PRIVILEGES should be set to 1.
#
select query, INSUFFICIENT_PRIVILEGES from information_schema.OPTIMIZER_TRACE;
query INSUFFICIENT_PRIVILEGES
1
set optimizer_trace='enabled=off';
connection default;
select current_user();
current_user()
root@localhost
select * from db1.v1;
a
1
2
3
drop user foo@localhost, bar@localhost;
drop view db1.v1;
drop table db1.t1;
drop database db1;
set optimizer_trace="enabled=off";
|
