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Re: pg_restore with -j fails (works without -j option)

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Lonni J Friedman <netllama@xxxxxxxxx> writes:
> [ this doesn't work: ]
> $ cat 2011-08-25-1314280801-nightly.out | pg_restore -j2 -U lfriedman -v -d nightly

It's basically impossible for that to work.  -j implies spawning
multiple processes that will be wanting to read concurrently from
different places in the input file.  That cannot happen when the source
is a pipe.  In this particular example, the pipe construct isn't even
doing anything useful; you could perfectly well write this instead:

$ pg_restore -j2 -U lfriedman -v -d nightly 2011-08-25-1314280801-nightly.out


> pg_restore: [custom archiver] cannot reopen stdin
> pg_restore: *** aborted because of error

I agree though that that's not a terribly friendly error message.
I thought we had some code in there to complain about non-seekable
input files, but it looks like we missed a case.

			regards, tom lane

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