| From: | Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> |
|---|---|
| To: | John Wells <jb(at)sourceillustrated(dot)com> |
| Cc: | pgsql-general(at)postgresql(dot)org |
| Subject: | Re: Recovering data via raw table and field separators |
| Date: | 2007-12-04 18:38:16 |
| Message-ID: | 20071204183816.GH4727@alvh.no-ip.org |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-general |
John Wells wrote:
> On 12/4/07, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> wrote:
> > There are no field separators. Perhaps you could extract some useful
> > info with pg_filedump, which you can grab at
> > http://sources.redhat.com/rhdb
>
> So is it simply field width? Can one count the number of bytes based
> on native datatype length and determine field start/end?
Yes. For variable length types, there is a 4-byte length word at the
start of the field (unless you are using 8.3 which introduces more
compact representations in some cases).
--
Alvaro Herrera http://www.flickr.com/photos/alvherre/
"If it wasn't for my companion, I believe I'd be having
the time of my life" (John Dunbar)
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