my $values_array=${$dbh2->selectall_arrayref($query1)};
is trying to tell Perl that the return value for selectall_arrayref is a scalar reference, which it isn't. Changing this to:
my $values_array=$dbh2->selectall_arrayref($query1);
should fix that particular problem. You don't need to tell Perl what kind of reference is being returned until you access it.
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