You could use DBD::CSV and supply the column names when you create the db handle. Then just $sth->fetchrow_hashref like you would any other sql query result.
update: added some code :)
my $dbh = DBI->connect(q{DBI:CSV:});
$dbh->{'csv_tables'}->{'mytable'} = {
'file' => 'mytable.csv',
'sep_char' => "\t"
'col_names' => ["col_a", "col_b", "col_c"]
};
my $sth = $dbh->prepare("SELECT m.col_a, m.col_c FROM mytable m");
$sth->execute;
my @rows;
while (my $row = $sth->fetchrow_hashref) {
push @rows, $row;
}
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