my $dt_min = $format_date->format_datetime( $dt_set->min );
my $dt_max = $format_date->format_datetime( $dt_set->max );

my $where_statement = <<EOF;
 where ir.ir_id = cm.call_master_id and 
 ir.closed_date is not NULL and 
(ir.closed_date >= '$dt_min' and
 ir.closed_date < '$dt_max' ) and cm.user_id = ? 
EOF