2
drop table if exists t1;
5
create table t1(n1 int, n2 int, s char(20), vs varchar(20), t text);
6
insert into t1 values (1,11, 'one','eleven', 'eleven'),
7
(1,11, 'one','eleven', 'eleven'),
8
(2,11, 'two','eleven', 'eleven'),
9
(2,12, 'two','twevle', 'twelve'),
10
(2,13, 'two','thirteen', 'foo'),
11
(2,13, 'two','thirteen', 'foo'),
12
(2,13, 'two','thirteen', 'bar'),
13
(NULL,13, 'two','thirteen', 'bar'),
14
(2,NULL, 'two','thirteen', 'bar'),
15
(2,13, NULL,'thirteen', 'bar'),
16
(2,13, 'two',NULL, 'bar'),
17
(2,13, 'two','thirteen', NULL);
19
select distinct n1 from t1;
20
select count(distinct n1) from t1;
22
select distinct n2 from t1;
23
select count(distinct n2) from t1;
25
select distinct s from t1;
26
select count(distinct s) from t1;
28
select distinct vs from t1;
29
select count(distinct vs) from t1;
31
select distinct t from t1;
32
select count(distinct t) from t1;
34
select distinct n1,n2 from t1;
35
select count(distinct n1,n2) from t1;
37
select distinct n1,s from t1;
38
select count(distinct n1,s) from t1;
40
select distinct s,n1,vs from t1;
41
select count(distinct s,n1,vs) from t1;
43
select distinct s,t from t1;
44
select count(distinct s,t) from t1;
46
select count(distinct n1), count(distinct n2) from t1;
48
select count(distinct n2), n1 from t1 group by n1;
51
# test the conversion from tree to MyISAM
52
create table t1 (n int default NULL);
57
eval insert into t1 values($1);
63
select count(distinct n) from t1;
64
show status like 'Created_tmp_disk_tables';
67
# Test use of MyISAM tmp tables
68
create table t1 (s text);
73
eval insert into t1 values('$1');
78
select count(distinct s) from t1;
79
show status like 'Created_tmp_disk_tables';