perlquestion jacques This DBI statement is taking too long and I need to speed things up: <code> my $sth = $dbh->prepare("select * from campaigns where mw_export='yes' and last_update > ?"); $sth->execute(last_transfer{'campaigns'}); while(my $result = $sth->fetchrow_hashref()) { print "It takes me over 30 minutes to print this!!!\n"; } </code> I have about 40,000 rows with each row containing about 200 fields. My program hangs for a loooooong time. So I know I have a few options: <p> 1. Use indexes. <br> 2. Use fetchrow_arrayref instead of fetchrow_hashref. <p> I created two indexes but didn't notice any speed improvement: <code> alter table campaigns add index mw_export (mw_export); alter table campaigns add index last_update (last_update); </code> Should I create a different type of index? Those are the SQL statements that I used. <p> <b>The other option</b> is to use fetchrow_arrayref. But I *need* to have $result as a hash ref. Would it be okay to convert the array ref to a hash ref? What would be the best way to do that? <p> I heard that fetchrow_arrayref is way faster than its hashref counterpart. <p> Any other things that I could try?