2 # Test of count(distinct ..)
6 drop table if exists t1;
8 create table t1(n int not null, key(n)) delay_key_write = 1;
13 eval insert into t1 values($1);
14 eval insert into t1 values($1);
18 select count(distinct n) from t1;
19 explain extended select count(distinct n) from t1;