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
|
################################################################################
# inc/vcol_trigger_sp.inc #
# #
# Purpose: #
# Testing triggers, stored procedures and functions #
# defined on tables with virtual columns. #
# #
# #
# #
#------------------------------------------------------------------------------#
# Original Author: Andrey Zhakov #
# Original Date: 2008-09-04 #
# Change Author: Oleksandr Byelkin (Monty program Ab)
# Date: 2009-03-24
# Change: Syntax changed
################################################################################
create table t1 (a int,
b int as (a/10),
c int as (a/10) persistent);
create table t2 (a timestamp);
delimiter |;
create trigger trg1 before insert on t1 for each row
begin
if (new.b < 10) then
set new.a:= 100;
set new.b:= 9;
set new.c:= 9;
end if;
if (new.c > 50) then
set new.a:= 500;
end if;
end|
create trigger trg2 after insert on t1 for each row
begin
if (new.b >= 60) then
insert into t2 values (now());
end if;
end|
create function f1()
returns int
begin
declare sum1 int default '0';
declare cur1 cursor for select sum(b) from t1;
open cur1;
fetch cur1 into sum1;
close cur1;
return sum1;
end|
delimiter ;|
set sql_warnings = 1;
insert into t1 (a) values (200);
select * from t1;
select * from t2;
insert into t1 (a) values (10);
select * from t1;
select * from t2;
insert into t1 (a) values (600);
select * from t1;
--replace_column 1 <timestamp>
select * from t2;
select f1();
set sql_warnings = 0;
drop trigger trg1;
drop trigger trg2;
drop table t2;
delimiter |;
create procedure p1()
begin
declare i int default '0';
create table t2 like t1;
insert into t2 (a) values (100), (200);
begin
declare cur1 cursor for select sum(c) from t2;
open cur1;
fetch cur1 into i;
close cur1;
if (i=30) then
insert into t1 values (300,default,default);
end if;
end;
end|
delimiter ;|
delete from t1;
call p1();
select * from t2;
select * from t1;
drop table t1,t2;
drop procedure p1;
--echo #
--echo # Bug mdev-3845: values of virtual columns are not computed for triggers
--echo #
CREATE TABLE t1 (
a INTEGER UNSIGNED NULL DEFAULT NULL,
b INTEGER UNSIGNED GENERATED ALWAYS AS (a) VIRTUAL
);
CREATE TABLE t2 (c INTEGER UNSIGNED NOT NULL);
DELIMITER |;
CREATE TRIGGER t1_ins_aft
AFTER INSERT
ON t1
FOR EACH ROW
BEGIN
INSERT INTO t2 (c) VALUES (NEW.b);
END |
CREATE TRIGGER t1_del_bef
BEFORE DELETE
ON t1
FOR EACH ROW
BEGIN
INSERT INTO t2 (c) VALUES (OLD.b);
END |
DELIMITER ;|
INSERT INTO t1 (a) VALUES (1), (2), (3);
SELECT * FROM t2;
DELETE FROM t1;
SELECT * FROM t2;
DROP TRIGGER t1_ins_aft;
DROP TRIGGER t1_del_bef;
DROP TABLE t1,t2;
--echo #
--echo # Examine the number of times triggers are recalculated for updates
--echo #
SET sql_mode = 'NO_ENGINE_SUBSTITUTION';
CREATE TABLE t1 (
a INTEGER UNSIGNED NULL DEFAULT NULL,
b CHAR(10) NULL DEFAULT NULL,
c blob NULL DEFAULT NULL,
blob_a blob GENERATED ALWAYS AS (last_value(@a:=@a+1,a)) VIRTUAL,
blob_b blob GENERATED ALWAYS AS (last_value(@b:=@b+1,b)) VIRTUAL,
blob_c blob GENERATED ALWAYS AS (last_value(@c:=@c+1,c)) VIRTUAL
);
DELIMITER |;
CREATE TRIGGER t1_ins
BEFORE INSERT
ON t1
FOR EACH ROW
BEGIN
IF NEW.b IS NULL THEN
SET NEW.b="generated before insert";
END IF;
END |
CREATE TRIGGER t1_update
BEFORE UPDATE
ON t1
FOR EACH ROW
BEGIN
IF NEW.b IS NULL or NEW.c IS NULL THEN
SET NEW.b="generated before update";
SET NEW.c="generated before update";
END IF;
END |
DELIMITER ;|
--echo # Inserts
set @a=0,@b=0,@c=0;
insert into t1 (a) values(1);
insert into t1 (a,b) values(2, "*2*");
insert into t1 (a,b,c) values(3, "*3*", "**3**");
insert into t1 (a,c) values(4, "**4**");
select * from t1;
select @a,@b,@c;
select * from t1;
select @a,@b,@c;
select a,b,c from t1;
select @a,@b,@c;
select a,b,c,blob_a from t1;
select @a,@b,@c;
--echo # updates
set @a=0,@b=0,@c=0;
update t1 set a=a+100 where a=1;
update t1 set a=a+100, b="*102*" where a=2;
update t1 set a=a+100, b=NULL where a=3;
update t1 set a=a+100, b="invisible", c=NULL where a=4;
select @a,@b,@c;
select * from t1;
drop trigger t1_ins;
drop trigger t1_update;
drop table t1;
SET sql_mode = DEFAULT;
--echo #
--echo # Same test, but with virtual keys
--echo #
SET sql_mode = 'NO_ENGINE_SUBSTITUTION';
CREATE TABLE t1 (
a INTEGER UNSIGNED NULL DEFAULT NULL,
b CHAR(10) NULL DEFAULT NULL,
c blob NULL DEFAULT NULL,
blob_a blob GENERATED ALWAYS AS (a) VIRTUAL,
blob_b blob GENERATED ALWAYS AS (b) VIRTUAL,
blob_c blob GENERATED ALWAYS AS (c) VIRTUAL,
key (a),
key (blob_a(10)),
key (blob_b(10)),
key (blob_c(10))
);
DELIMITER |;
CREATE TRIGGER t1_ins
BEFORE INSERT
ON t1
FOR EACH ROW
BEGIN
IF NEW.b IS NULL THEN
SET NEW.b="generated before insert";
END IF;
END |
CREATE TRIGGER t1_update
BEFORE UPDATE
ON t1
FOR EACH ROW
BEGIN
IF NEW.b IS NULL or NEW.c IS NULL THEN
SET NEW.b="generated before update";
SET NEW.c="generated before update";
END IF;
END |
DELIMITER ;|
--echo # Inserts
insert into t1 (a) values(1);
insert into t1 (a,b) values(2, "*2*");
insert into t1 (a,b,c) values(3, "*3*", "**3**");
insert into t1 (a,c) values(4, "**4**");
select * from t1;
select @a,@b,@c;
select * from t1;
select @a,@b,@c;
select a,b,c from t1;
select @a,@b,@c;
select a,b,c,blob_a from t1;
select @a,@b,@c;
--echo # updates
update t1 set a=a+100 where a=1;
update t1 set a=a+100, b="*102*" where a=2;
update t1 set a=a+100, b=NULL where a=3;
update t1 set a=a+100, b="invisible", c=NULL where a=4;
select * from t1;
drop trigger t1_ins;
drop trigger t1_update;
drop table t1;
SET sql_mode = DEFAULT;
|
