use strict;
use Apache::Constants qw(:common);
use Apache::Request;
use DBI;
use CGI::Carp;

sub handler {
   my $r=Apache::Request->new(shift);
   carp("calling DBI:CSV connect");
   DBI->trace( 2, 'dbitrace.log' );
   my $dbh1 = DBI->connect("DBI:CSV:f_dir=/local/tmp") or die carp("$DBI::errstr $!")
   carp("after DBI:CSV connect");

....some other stuff....

   return OK;
}