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Re: Unworkable column delimiter characters for COPY

From: Andrew Dunstan <andrew(at)dunslane(dot)net>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-hackers(at)postgreSQL(dot)org
Subject: Re: Unworkable column delimiter characters for COPY
Date: 2007-12-27 16:58:50
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Lists: pgsql-hackerspgsql-patches

Tom Lane wrote:
> Currently, copy.c rejects newline, carriage return, and backslash as
> settings for the column delimiter character (in non-CSV mode).  These
> all seem necessary to avoid confusion.  However, I just noticed that the
> letters r, n, t, etc would also not work: on output, data characters
> matching such a delimiter would get escaped as \r, \n, etc, which on
> input would be read as C-style control characters.
> I think at minimum we need to forbid b, f, n, r, t, v, which are the
> control character representations currently recognized by COPY.
> But I'm tempted to make it reject all 26 lower-case ASCII letters,
> as a form of future-proofing.  Thoughts?

Assuming this is only for non-CSV mode, it seems OK.



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