Re: Allow COPY's 'text' format to output a header

> On Aug 2, 2018, at 8:11 AM, Daniel Verite <daniel@manitou-mail.org> wrote:
>
> That makes sense, thanks for elaborating, although there are also
> a fair number of ERRCODE_FEATURE_NOT_SUPPORTED in copy.c
> that are raised on forbidden/nonsensical combination of features,
> so the consistency argument could work both ways.
>

If there is not a strong reason to change the error code, then I believe we should not. The error is the same as it was
before,just narrower in scope. 

Best,
-Cynthia