bench_count_distinct.test

来自「这是linux下运行的mysql软件包,可用于linux 下安装 php + m」· TEST 代码 · 共 23 行

#
# Test of count(distinct ..)
#

--disable_warnings
drop table if exists t1;
--enable_warnings
create table t1(n int not null, key(n)) delay_key_write = 1;
let $1=100;
disable_query_log;
while ($1)
{
 eval insert into t1 values($1);
 eval insert into t1 values($1);
 dec $1;
}
enable_query_log;
select count(distinct n) from t1;
explain extended select count(distinct n) from t1;
drop table t1;

# End of 4.1 tests