5
drop table if exists t1,t2;
8
create table t1 (a int, b int not null,unique key (a,b),index(b)) engine=myisam;
9
insert ignore into t1 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(null,7),(9,9),(8,8),(7,7),(null,9),(null,9),(6,6);
10
explain select * from t1 where a is null;
11
explain select * from t1 where a is null and b = 2;
12
explain select * from t1 where a is null and b = 7;
13
explain select * from t1 where a=2 and b = 2;
14
explain select * from t1 where a<=>b limit 2;
15
explain select * from t1 where (a is null or a > 0 and a < 3) and b < 5 limit 3;
16
explain select * from t1 where (a is null or a = 7) and b=7;
17
explain select * from t1 where (a is null or a = 7) and b=7 order by a;
18
explain select * from t1 where (a is null and b>a) or a is null and b=7 limit 2;
19
explain select * from t1 where a is null and b=9 or a is null and b=7 limit 3;
20
explain select * from t1 where a > 1 and a < 3 limit 1;
21
explain select * from t1 where a > 8 and a < 9;
22
select * from t1 where a is null;
23
select * from t1 where a is null and b = 7;
24
select * from t1 where a<=>b limit 2;
25
select * from t1 where (a is null or a > 0 and a < 3) and b < 5 limit 3;
26
select * from t1 where (a is null or a > 0 and a < 3) and b > 7 limit 3;
27
select * from t1 where (a is null or a = 7) and b=7;
28
select * from t1 where a is null and b=9 or a is null and b=7 limit 3;
29
select * from t1 where a > 1 and a < 3 limit 1;
30
select * from t1 where a > 8 and a < 9;
31
create table t2 like t1;
32
insert into t2 select * from t1;
33
alter table t1 modify b blob not null, add c int not null, drop key a, add unique key (a,b(20),c), drop key b, add key (b(10));
34
explain select * from t1 where a is null and b = 2;
35
explain select * from t1 where a is null and b = 2 and c=0;
36
explain select * from t1 where a is null and b = 7 and c=0;
37
explain select * from t1 where a=2 and b = 2;
38
explain select * from t1 where a<=>b limit 2;
39
explain select * from t1 where (a is null or a > 0 and a < 3) and b < 5 and c=0 limit 3;
40
explain select * from t1 where (a is null or a = 7) and b=7 and c=0;
41
explain select * from t1 where (a is null and b>a) or a is null and b=7 limit 2;
42
explain select * from t1 where a is null and b=9 or a is null and b=7 limit 3;
43
explain select * from t1 where a > 1 and a < 3 limit 1;
44
explain select * from t1 where a is null and b=7 or a > 1 and a < 3 limit 1;
45
explain select * from t1 where a > 8 and a < 9;
46
explain select * from t1 where b like "6%";
47
select * from t1 where a is null;
48
select * from t1 where a is null and b = 7 and c=0;
49
select * from t1 where a<=>b limit 2;
50
select * from t1 where (a is null or a > 0 and a < 3) and b < 5 limit 3;
51
select * from t1 where (a is null or a > 0 and a < 3) and b > 7 limit 3;
52
select * from t1 where (a is null or a = 7) and b=7 and c=0;
53
select * from t1 where a is null and b=9 or a is null and b=7 limit 3;
54
select * from t1 where b like "6%";
57
# Test ref_or_null optimization
60
rename table t2 to t1;
61
alter table t1 modify b int null;
62
insert into t1 values (7,null), (8,null), (8,7);
63
explain select * from t1 where a = 7 and (b=7 or b is null);
64
select * from t1 where a = 7 and (b=7 or b is null);
65
explain select * from t1 where (a = 7 or a is null) and (b=7 or b is null);
66
select * from t1 where (a = 7 or a is null) and (b=7 or b is null);
67
explain select * from t1 where (a = 7 or a is null) and (a = 7 or a is null);
68
select * from t1 where (a = 7 or a is null) and (a = 7 or a is null);
69
create table t2 (a int);
70
insert into t2 values (7),(8);
71
explain select * from t2 straight_join t1 where t1.a=t2.a and b is null;
73
explain select * from t2,t1 where t1.a=t2.a and b is null;
74
select * from t2,t1 where t1.a=t2.a and b is null;
75
explain select * from t2,t1 where t1.a=t2.a and (b= 7 or b is null);
76
select * from t2,t1 where t1.a=t2.a and (b= 7 or b is null);
77
explain select * from t2,t1 where (t1.a=t2.a or t1.a is null) and b= 7;
78
select * from t2,t1 where (t1.a=t2.a or t1.a is null) and b= 7;
79
explain select * from t2,t1 where (t1.a=t2.a or t1.a is null) and (b= 7 or b is null);
80
select * from t2,t1 where (t1.a=t2.a or t1.a is null) and (b= 7 or b is null);
81
insert into t2 values (null),(6);
82
delete from t1 where a=8;
83
explain select * from t2,t1 where t1.a=t2.a or t1.a is null;
84
explain select * from t2,t1 where t1.a<=>t2.a or (t1.a is null and t1.b <> 9);
85
select * from t2,t1 where t1.a<=>t2.a or (t1.a is null and t1.b <> 9);
89
# The following failed for Matt Loschert
93
id int(10) unsigned NOT NULL auto_increment,
94
uniq_id int(10) unsigned default NULL,
96
UNIQUE KEY idx1 (uniq_id)
100
id int(10) unsigned NOT NULL auto_increment,
101
uniq_id int(10) unsigned default NULL,
105
INSERT INTO t1 VALUES (1,NULL),(2,NULL),(3,1),(4,2),(5,NULL),(6,NULL),(7,3),(8,4),(9,NULL),(10,NULL);
106
INSERT INTO t2 VALUES (1,NULL),(2,NULL),(3,1),(4,2),(5,NULL),(6,NULL),(7,3),(8,4),(9,NULL),(10,NULL);
109
# Check IS NULL optimization
111
explain select id from t1 where uniq_id is null;
112
explain select id from t1 where uniq_id =1;
116
UPDATE t1 SET id=id+100 where uniq_id is null;
117
UPDATE t2 SET id=id+100 where uniq_id is null;
118
select id from t1 where uniq_id is null;
119
select id from t2 where uniq_id is null;
121
# Delete all records from each table where the uniq_id field is null
123
DELETE FROM t1 WHERE uniq_id IS NULL;
124
DELETE FROM t2 WHERE uniq_id IS NULL;
126
# Select what is left -- notice the difference
128
SELECT * FROM t1 ORDER BY uniq_id, id;
129
SELECT * FROM t2 ORDER BY uniq_id, id;
133
# This crashed MySQL 3.23.47
137
`order_id` char(32) NOT NULL default '',
138
`product_id` char(32) NOT NULL default '',
139
`product_type` int(11) NOT NULL default '0',
140
PRIMARY KEY (`order_id`,`product_id`,`product_type`)
143
`order_id` char(32) NOT NULL default '',
144
`product_id` char(32) NOT NULL default '',
145
`product_type` int(11) NOT NULL default '0',
146
PRIMARY KEY (`order_id`,`product_id`,`product_type`)
148
INSERT INTO t1 (order_id, product_id, product_type) VALUES
149
('3d7ce39b5d4b3e3d22aaafe9b633de51',1206029, 3),
150
('3d7ce39b5d4b3e3d22aaafe9b633de51',5880836, 3),
151
('9d9aad7764b5b2c53004348ef8d34500',2315652, 3);
152
INSERT INTO t2 (order_id, product_id, product_type) VALUES
153
('9d9aad7764b5b2c53004348ef8d34500',2315652, 3);
156
left join t2 using(order_id, product_id, product_type)
157
where t2.order_id=NULL;
159
left join t2 using(order_id, product_id, product_type)
160
where t2.order_id is NULL;
164
# The last select returned wrong results in 3.23.52
167
create table t1 (id int);
168
insert into t1 values (null), (0);
169
create table t2 (id int);
170
insert into t2 values (null);
171
select * from t1, t2 where t1.id = t2.id;
172
alter table t1 add key id (id);
173
select * from t1, t2 where t1.id = t2.id;
177
# Check bug when doing <=> NULL on an indexed null field
182
id2 integer not null,
186
insert into t1 values(null,null),(1,1);
188
select * from t1 where id <=> null;
189
select * from t1 where id <=> null or id > 0;
190
select * from t1 where id is null or id > 0;
191
select * from t1 where id2 <=> null or id2 > 0;
192
select * from t1 where id2 is null or id2 > 0;
193
delete from t1 where id <=> NULL;
198
# Test for bug #12144: optimizations for key access with null keys
199
# used for outer joins
202
CREATE TABLE t1 (a int);
203
CREATE TABLE t2 (a int, b int, INDEX idx(a));
204
CREATE TABLE t3 (b int, INDEX idx(b));
205
CREATE TABLE t4 (b int, INDEX idx(b));
206
INSERT INTO t1 VALUES (1), (2), (3), (4);
207
INSERT INTO t2 VALUES (1, 1), (3, 1);
208
INSERT INTO t3 VALUES
209
(NULL), (NULL), (NULL), (NULL), (NULL),
210
(NULL), (NULL), (NULL), (NULL), (NULL);
211
INSERT INTO t4 SELECT * FROM t3;
212
INSERT INTO t3 SELECT * FROM t4;
213
INSERT INTO t4 SELECT * FROM t3;
214
INSERT INTO t3 SELECT * FROM t4;
215
INSERT INTO t4 SELECT * FROM t3;
216
INSERT INTO t3 SELECT * FROM t4;
217
INSERT INTO t4 SELECT * FROM t3;
218
INSERT INTO t3 SELECT * FROM t4;
219
INSERT INTO t4 SELECT * FROM t3;
220
INSERT INTO t3 SELECT * FROM t4;
221
INSERT INTO t4 SELECT * FROM t3;
222
INSERT INTO t3 SELECT * FROM t4;
223
INSERT INTO t4 SELECT * FROM t3;
224
INSERT INTO t3 SELECT * FROM t4;
225
INSERT INTO t4 SELECT * FROM t3;
226
INSERT INTO t3 SELECT * FROM t4;
227
INSERT INTO t3 VALUES (2), (3);
229
ANALYZE table t1, t2, t3;
231
SELECT COUNT(*) FROM t3;
233
EXPLAIN SELECT SQL_CALC_FOUND_ROWS * FROM t1 LEFT JOIN t2 ON t1.a=t2.a
234
LEFT JOIN t3 ON t2.b=t3.b;
236
SELECT SQL_CALC_FOUND_ROWS * FROM t1 LEFT JOIN t2 ON t1.a=t2.a
237
LEFT JOIN t3 ON t2.b=t3.b;
239
SHOW STATUS LIKE "handler_read%";
241
DROP TABLE t1,t2,t3,t4;
245
# BUG#34945 "ref_or_null queries that are null_rejecting and have a null value crash mysql"
248
a int(11) default NULL,
249
b int(11) default NULL,
252
INSERT INTO t1 VALUES (0,10),(0,11),(0,12);
255
a int(11) default NULL,
256
b int(11) default NULL,
259
INSERT INTO t2 VALUES (3,NULL),(3,11),(3,12);
261
SELECT * FROM t2 inner join t1 WHERE ( t1.a = 0 OR t1.a IS NULL) AND t2.a = 3 AND t2.b = t1.b;
264
-- echo End of 5.0 tests