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? regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 1: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly