Re: BUG #7590: Data corruption using pg_dump only with -Z parameter

On 10/10/2012 03:07 AM, Jan Vodička wrote:
> = not able to unpack, invalid
>
> Try this one generated by "pg_dump -Z1 > backup.gz" in windows:
> http://mstu.cz/~hrtlik/backup.gz
> <http://mstu.cz/%7Ehrtlik/backup.gz> (0.5kB)
> original "pg_dump > backup.gz" without compression:
> http://mstu.cz/~hrtlik/backup.sql <http://mstu.cz/%7Ehrtlik/backup.sql>
>
> If you have any way how to get original, tell me.

If Tom is right and the issue is end-of-line transformation, in theory
you might be able to un-mungle newlines. The chances of \r\n occurring
naturally in a tiny backup like that are not huge, so any \r\n in the
data probably used to be a raw \n. Taking a copy of the DB and
performing that substitution might get you a usable backup file.

That's replacing all \x0d\x0a sequences with \x0a. Or I might be wrong
and it's \x0d.

This won't work on a larger backup where some \r\n sequences will occur
naturally in compressed binary data. In those you're likely to have a
much, much bigger job ahead of you.

--
Craig Ringer