-my $count_query = delete($sql_query->{'count_query'});
-my @extra_headers = @{ delete($sql_query->{'extra_headers'}) };
-my @extra_fields = @{ delete($sql_query->{'extra_fields'}) };
+my $count_query = delete($sql_query->{'count_query'});
+my @extra_headers = @{ delete($sql_query->{'extra_headers'}) };
+my @extra_fields = @{ delete($sql_query->{'extra_fields'}) };
+my @extra_sort_fields = @{ delete($sql_query->{'extra_sort_fields'}) };