Re: COPY formatting

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От Bruce Momjian
Тема Re: COPY formatting
Дата
Msg-id 200403191901.i2JJ1Hu20522@candle.pha.pa.us
обсуждение исходный текст
Ответ на Re: COPY formatting  ("Thomas Swan" <tswan@idigx.com>)
Ответы Re: COPY formatting  (Andrew Dunstan <andrew@dunslane.net>)
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Thomas Swan wrote:
> > I have never seen such a beast, and if I had been asked off the cuff
> > would have said that it was probably illegal, except that I know of no
> > standard actually defining the format. Perhaps others (Joshua Drake or
> > Josh Berkus?) have wider experience. I think in any case we should
> > ignore those for now and handle the straightforward case.
> >
> > I *have* seen monstrosities like fields that do not begin with the quote
> > character but then break into a quote, e.g.:
> >
> > 1,2,a,123"abc""def",6,7,8
> >
> 
> I have dealt with both, frequently.   The CSV format allows you to begin a
> block of text with the quote.  Newlines are included in that quoted space.
>   If qoutes are included in the field then the quotes are double quotes to
> denote they are not part of the quoted space.
> 
> Also, the following is valid.
> 
> 1,2,,,"",,,""
> 
> "" is empty.
> 
> 1,2,3,"""",,,,"",
> 
> The 4 quotes denote a single double quote.
> 
> Writing simple CSV converts that just explode on commas and newlines miss
> these oddities.

OK, so for the separator, quote, and escape options:
separator is ,quote is "escape is "

so if the quote and escape are the same, then a double denotes a
single?

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
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