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'$LINK_ID'

$dbh->{FetchHashKeyName} = 'NAME_lc';
my $val_loh = $dbh->selectall_arrayref($sql,{Slice => {}});

use strict;
use warnings;
...
# Enable the following line after you confirm this code is correct
# $dbh->do($sql,{},@{$row}{@columns});
}