Re: quoting psql varible as identifier

hello

2010/1/2 Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>:
> Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> writes:
>> here is patch
>
> I looked at this patch a bit, and I think the real problem with it is
> that it's not multibyte safe.  You've copied backend code that is
> allowed to assume it's in a safe encoding (ie, one where multibyte
> characters can't contain non-high-bit-set bytes).  This is not okay
> on the client side, see SJIS and similar encodings.
>
> Where you need to start out is by cloning PQescapeStringConn, which does
> a similar type of transformation correctly even in unsafe encodings.
> I think we'd agreed upthread that libpq should provide
> PQescapeIdentifier functionality anyhow.
>

I am looking on psql directory. Now I found, so in this directory is
linked dumputil.c - It could little bit to help us.

I have one question. If I understand well, the function fmtId isn't
multibyte safe? So why is possible to use it in pg_dump?

Pavel

> Once you've actually read that code, you'll realize that it's okay to
> treat the error result as a warning, which resolves the other point
> of concern.  Just print the message and use the result anyway.
>
>                        regards, tom lane
>