How TODO prevent PQfnumber() from lowercasing?

Hi,

Which way do you suggest to "Prevent libpq's PQfnumber() from
lowercasing the column name" (which is listed as a TODO item). If
column name has quotes around it we're just removing the quotes and
comparing with the related column name. Else, lowercasing the column
name and then comparing.

I couldn't get the idea behind this TODO. Can somebody explain it a
little bit more?

Regards.