mirror of
https://github.com/MariaDB/server.git
synced 2025-01-19 05:22:25 +01:00
30 lines
913 B
Text
30 lines
913 B
Text
#
|
|
# Test of different EXPLAIN's
|
|
|
|
drop table if exists t1;
|
|
create table t1 (id int not null, str char(10), unique(str));
|
|
explain select * from t1;
|
|
insert into t1 values (1, null),(2, null),(3, "foo"),(4, "bar");
|
|
select * from t1 where str is null;
|
|
select * from t1 where str="foo";
|
|
explain select * from t1 where str is null;
|
|
explain select * from t1 where str="foo";
|
|
explain select * from t1 ignore key (str) where str="foo";
|
|
explain select * from t1 use key (str,str) where str="foo";
|
|
|
|
#The following should give errors
|
|
--error 1072
|
|
explain select * from t1 use key (str,str,foo) where str="foo";
|
|
--error 1072
|
|
explain select * from t1 ignore key (str,str,foo) where str="foo";
|
|
drop table t1;
|
|
|
|
explain select 1;
|
|
|
|
create table t1 (a int not null);
|
|
explain select count(*) from t1;
|
|
insert into t1 values(1);
|
|
explain select count(*) from t1;
|
|
insert into t1 values(1);
|
|
explain select count(*) from t1;
|
|
drop table t1;
|