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Re: pg_dump/pg_restore

From: "Colin Stearman" <cstearman(at)infofind(dot)com>
To: "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: <pgsql-bugs(at)postgresql(dot)org>
Subject: Re: pg_dump/pg_restore
Date: 2002-11-24 20:11:58
Message-ID: 003001c293f5$bf6e9080$3301a8c0@Colin2000 (view raw, whole thread or download thread mbox)
Lists: pgsql-bugs

You are 100% right about pg_restore fixing up OID references in tables to
blobs (and presumably any other objects).  I should have checked more
carefully and given the program more credit.

I will remove the -o as it is not necessary, as you say.

That resolves my script problem  Thanks!.

Regarding the --list output, the line reads "75; 0 BLOBS BLOBS", and listing
any database, whether or not it contains blobs, outputs the same thing (the
=20 is an email coding for EOL).  So I maintain that it may be a (benign)


----- Original Message -----
From: "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Colin Stearman" <cstearman(at)infofind(dot)com>
Cc: <pgsql-bugs(at)postgresql(dot)org>
Sent: Sunday, November 24, 2002 12:57 PM
Subject: Re: [BUGS] pg_dump/pg_restore

"Colin Stearman" <cstearman(at)infofind(dot)com> writes:
> 1. Large objects dumped, deleted then restored do not retain their
>  OIDs.  Big problem as we reference their OIDs in tables.

They're not supposed to (indeed cannot).  pg_restore is supposed to arrange
for references to large-object OIDs to be updated to the new values,
however.  I believe it looks in columns of types OID and LO --- if you
stored your references in plain int columns, that was a mistake.

If you're using the -o option simply because you think you need it for
blobs, you don't need it.

> 2. The pg_restore command --list indicated no Blobs in the dump file even
> hen there are.  For example:

>   75; 0 BLOBS BLOBS=20

Looks like you have blobs to me: that entry wouldn't even be there,

regards, tom lane

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