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
|
drop table if exists t1;
CREATE FUNCTION metaphon RETURNS STRING SONAME "UDF_EXAMPLE_LIB";
CREATE FUNCTION myfunc_double RETURNS REAL SONAME "UDF_EXAMPLE_LIB";
CREATE FUNCTION myfunc_nonexist RETURNS INTEGER SONAME "UDF_EXAMPLE_LIB";
ERROR HY000: Can't find function 'myfunc_nonexist' in library
CREATE FUNCTION myfunc_int RETURNS INTEGER SONAME "UDF_EXAMPLE_LIB";
CREATE FUNCTION sequence RETURNS INTEGER SONAME "UDF_EXAMPLE_LIB";
CREATE FUNCTION lookup RETURNS STRING SONAME "UDF_EXAMPLE_LIB";
CREATE FUNCTION reverse_lookup
RETURNS STRING SONAME "UDF_EXAMPLE_LIB";
CREATE AGGREGATE FUNCTION avgcost
RETURNS REAL SONAME "UDF_EXAMPLE_LIB";
select myfunc_double();
ERROR HY000: myfunc_double must have at least one argument
select myfunc_double(1);
myfunc_double(1)
49.00
select myfunc_double(78654);
myfunc_double(78654)
54.00
select myfunc_nonexist();
ERROR 42000: FUNCTION test.myfunc_nonexist does not exist
select myfunc_int();
myfunc_int()
0
select lookup();
ERROR HY000: Wrong arguments to lookup; Use the source
select lookup("127.0.0.1");
lookup("127.0.0.1")
127.0.0.1
select lookup(127,0,0,1);
ERROR HY000: Wrong arguments to lookup; Use the source
select lookup("localhost");
lookup("localhost")
127.0.0.1
select reverse_lookup();
ERROR HY000: Wrong number of arguments to reverse_lookup; Use the source
select reverse_lookup("127.0.0.1");
select reverse_lookup(127,0,0,1);
select reverse_lookup("localhost");
reverse_lookup("localhost")
NULL
select avgcost();
ERROR HY000: wrong number of arguments: AVGCOST() requires two arguments
select avgcost(100,23.76);
ERROR HY000: wrong argument type: AVGCOST() requires an INT and a REAL
create table t1(sum int, price float(24));
insert into t1 values(100, 50.00), (100, 100.00);
select avgcost(sum, price) from t1;
avgcost(sum, price)
75.0000
delete from t1;
insert into t1 values(100, 54.33), (200, 199.99);
select avgcost(sum, price) from t1;
avgcost(sum, price)
151.4367
drop table t1;
select metaphon('hello');
metaphon('hello')
HL
CREATE PROCEDURE `XXX1`(in testval varchar(10))
begin
select metaphon(testval);
end//
call XXX1('hello');
metaphon(testval)
HL
drop procedure xxx1;
CREATE PROCEDURE `XXX2`()
begin
declare testval varchar(10);
set testval = 'hello';
select metaphon(testval);
end//
call XXX2();
metaphon(testval)
HL
drop procedure xxx2;
CREATE TABLE bug19904(n INT, v varchar(10));
INSERT INTO bug19904 VALUES (1,'one'),(2,'two'),(NULL,NULL),(3,'three'),(4,'four');
SELECT myfunc_double(n) AS f FROM bug19904;
f
49.00
50.00
NULL
51.00
52.00
SELECT metaphon(v) AS f FROM bug19904;
f
ON
TW
NULL
0R
FR
DROP TABLE bug19904;
CREATE DEFINER=CURRENT_USER() FUNCTION should_not_parse
RETURNS STRING SONAME "should_not_parse.so";
ERROR HY000: Incorrect usage of SONAME and DEFINER
CREATE DEFINER=someone@somewhere FUNCTION should_not_parse
RETURNS STRING SONAME "should_not_parse.so";
ERROR HY000: Incorrect usage of SONAME and DEFINER
create table t1(f1 int);
insert into t1 values(1),(2);
explain select myfunc_int(f1) from t1 order by 1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using temporary; Using filesort
drop table t1;
CREATE TABLE t1(a INT, b INT);
INSERT INTO t1 values (1,1),(2,2);
CREATE FUNCTION fn(a int) RETURNS int DETERMINISTIC
BEGIN
RETURN a;
END
||
CREATE VIEW v1 AS SELECT a, fn(MIN(b)) as c FROM t1 GROUP BY a;
SELECT myfunc_int(a AS attr_name) FROM t1;
myfunc_int(a AS attr_name)
1
2
EXPLAIN EXTENDED SELECT myfunc_int(a AS attr_name) FROM t1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
Warnings:
Note 1003 select myfunc_int(`test`.`t1`.`a` AS `attr_name`) AS `myfunc_int(a AS attr_name)` from `test`.`t1`
EXPLAIN EXTENDED SELECT myfunc_int(a) FROM t1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
Warnings:
Note 1003 select myfunc_int(`test`.`t1`.`a` AS `a`) AS `myfunc_int(a)` from `test`.`t1`
SELECT a,c FROM v1;
a c
1 1
2 2
SELECT a, fn(MIN(b) xx) as c FROM t1 GROUP BY a;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'xx) as c FROM t1 GROUP BY a' at line 1
SELECT myfunc_int(fn(MIN(b) xx)) as c FROM t1 GROUP BY a;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'xx)) as c FROM t1 GROUP BY a' at line 1
SELECT myfunc_int(test.fn(MIN(b) xx)) as c FROM t1 GROUP BY a;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'xx)) as c FROM t1 GROUP BY a' at line 1
SELECT myfunc_int(fn(MIN(b)) xx) as c FROM t1 GROUP BY a;
c
1
2
SELECT myfunc_int(test.fn(MIN(b)) xx) as c FROM t1 GROUP BY a;
c
1
2
EXPLAIN EXTENDED SELECT myfunc_int(MIN(b) xx) as c FROM t1 GROUP BY a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using temporary; Using filesort
Warnings:
Note 1003 select myfunc_int(min(`test`.`t1`.`b`) AS `xx`) AS `c` from `test`.`t1` group by `test`.`t1`.`a`
EXPLAIN EXTENDED SELECT test.fn(MIN(b)) as c FROM t1 GROUP BY a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using temporary; Using filesort
Warnings:
Note 1003 select `test`.`fn`(min(`test`.`t1`.`b`)) AS `c` from `test`.`t1` group by `test`.`t1`.`a`
EXPLAIN EXTENDED SELECT myfunc_int(fn(MIN(b))) as c FROM t1 GROUP BY a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using temporary; Using filesort
Warnings:
Note 1003 select myfunc_int(`fn`(min(`test`.`t1`.`b`)) AS `fn(MIN(b))`) AS `c` from `test`.`t1` group by `test`.`t1`.`a`
EXPLAIN EXTENDED SELECT myfunc_int(test.fn(MIN(b))) as c FROM t1 GROUP BY a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using temporary; Using filesort
Warnings:
Note 1003 select myfunc_int(`test`.`fn`(min(`test`.`t1`.`b`)) AS `test.fn(MIN(b))`) AS `c` from `test`.`t1` group by `test`.`t1`.`a`
SELECT myfunc_int(MIN(b) xx) as c FROM t1 GROUP BY a;
c
1
2
SELECT test.fn(MIN(b)) as c FROM t1 GROUP BY a;
c
1
2
SELECT myfunc_int(fn(MIN(b))) as c FROM t1 GROUP BY a;
c
1
2
SELECT myfunc_int(test.fn(MIN(b))) as c FROM t1 GROUP BY a;
c
1
2
DROP VIEW v1;
DROP TABLE t1;
DROP FUNCTION fn;
End of 5.0 tests.
DROP FUNCTION metaphon;
DROP FUNCTION myfunc_double;
DROP FUNCTION myfunc_nonexist;
ERROR 42000: FUNCTION test.myfunc_nonexist does not exist
DROP FUNCTION myfunc_int;
DROP FUNCTION sequence;
DROP FUNCTION lookup;
DROP FUNCTION reverse_lookup;
DROP FUNCTION avgcost;
select * from mysql.func;
name ret dl type
CREATE FUNCTION is_const RETURNS STRING SONAME "UDF_EXAMPLE_LIB";
select IS_const(3);
IS_const(3)
const
drop function IS_const;
select * from mysql.func;
name ret dl type
select is_const(3);
ERROR 42000: FUNCTION test.is_const does not exist
CREATE FUNCTION is_const RETURNS STRING SONAME "UDF_EXAMPLE_LIB";
select
is_const(3) as const,
is_const(3.14) as const,
is_const('fnord') as const,
is_const(2+3) as const,
is_const(rand()) as 'nc rand()',
is_const(sin(3.14)) as const,
is_const(upper('test')) as const;
const const const const nc rand() const const
const const const const not const const const
create table bug18761 (n int);
insert into bug18761 values (null),(2);
select
is_const(3) as const,
is_const(3.14) as const,
is_const('fnord') as const,
is_const(2+3) as const,
is_const(2+n) as 'nc 2+n ',
is_const(sin(n)) as 'nc sin(n)',
is_const(sin(3.14)) as const,
is_const(upper('test')) as const,
is_const(rand()) as 'nc rand()',
is_const(n) as 'nc n ',
is_const(is_const(n)) as 'nc ic?(n)',
is_const(is_const('c')) as const
from
bug18761;
const const const const nc 2+n nc sin(n) const const nc rand() nc n nc ic?(n) const
const const const const not const not const const const not const not const not const const
const const const const not const not const const const not const not const not const const
drop table bug18761;
select is_const((1,2,3));
ERROR 21000: Operand should contain 1 column(s)
drop function if exists is_const;
CREATE FUNCTION metaphon RETURNS STRING SONAME "UDF_EXAMPLE_LIB";
CREATE FUNCTION myfunc_double RETURNS REAL SONAME "UDF_EXAMPLE_LIB";
CREATE FUNCTION myfunc_int RETURNS INTEGER SONAME "UDF_EXAMPLE_LIB";
create function f1(p1 varchar(255))
returns varchar(255)
begin
return metaphon(p1);
end//
create function f2(p1 varchar(255))
returns double
begin
return myfunc_double(p1);
end//
create function f3(p1 varchar(255))
returns double
begin
return myfunc_int(p1);
end//
select f3(NULL);
f3(NULL)
0
select f2(NULL);
f2(NULL)
NULL
select f1(NULL);
f1(NULL)
NULL
drop function f1;
drop function f2;
drop function f3;
drop function metaphon;
drop function myfunc_double;
drop function myfunc_int;
CREATE FUNCTION metaphon RETURNS STRING SONAME "UDF_EXAMPLE_LIB";
create table t1 (a char);
set GLOBAL query_cache_size=1355776;
reset query cache;
select metaphon('MySQL') from t1;
metaphon('MySQL')
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 0
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 0
select metaphon('MySQL') from t1;
metaphon('MySQL')
show status like "Qcache_hits";
Variable_name Value
Qcache_hits 0
show status like "Qcache_queries_in_cache";
Variable_name Value
Qcache_queries_in_cache 0
drop table t1;
drop function metaphon;
set GLOBAL query_cache_size=default;
End of 5.0 tests.
|
