mysql-test/t/bench_count_distinct.test


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drop table if exists t1;
create table t1(n int not null, key(n)) delay_key_write = 1;
let $1=100;
while ($1)
{
 eval insert into t1 values($1);
 eval insert into t1 values($1);
 dec $1;
}

select count(distinct n) from t1;
drop table t1;