$p = $p->{$_} for (@$pref_path, $pre);
$self->throw_exception (
- "Unable to resolve prefetch $pre - join alias map does not contain an entry for path: "
+ "Unable to resolve prefetch '$pre' - join alias map does not contain an entry for path: "
. join (' -> ', @$pref_path, $pre)
) if (ref $p->{-join_aliases} ne 'ARRAY' or not @{$p->{-join_aliases}} );