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Re: BUG #2386: pg_restore doesn't restore large objects

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Patrick Headley <linxconsulting(at)comcast(dot)net>
Cc: "'Tom Lane'" <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-bugs(at)postgresql(dot)org
Subject: Re: BUG #2386: pg_restore doesn't restore large objects
Date: 2006-04-13 19:39:47
Message-ID: 200604131939.k3DJdl622059@candle.pha.pa.us (view raw or flat)
Thread:
Lists: pgsql-bugs
I think our problem is that we understand the backend very well, but not
how pgadmin does this operation.

---------------------------------------------------------------------------

Patrick Headley wrote:
> I'm a bit hurt by your statement that what I sent was just about useless :(
> The problem here is that I am new to PostgreSQL and PGAdmin III and so, in
> my confusion about what's normal and what's not, I am unable to provide you
> with all the details that would help you resolve the problem. However, I
> tried to be clear about what actions didn't work and those that did. Just as
> a point of reference, I was essentially thrown into the world of PostgreSQL
> where the installations were incomplete and the databases were poorly
> designed so the learning curve has been short and steep.
> So, let me try to explain this again.
> 
> I recently added an LO object to a database using Peter Mount's LO type. So
> far, that's working. Yesterday, I made a backup of the database in order to
> restore it onto my test server. I used PGAdmin III to do the backup and it
> worked OK. Due to the problems I'm having with the restore, I tried the
> backup from two Mac OS X G4 servers and one Mac OS X Intel Dou server. All
> the backups were run from PGAdmin III and they all seem to work. I didn't
> attempt to restore every backup from every machine but they all ran the same
> and no error messages appeared.
> 
> When I try to restore the backup using PGAdmin III, the log window begins to
> fill up. Near the end, when it should say it's restoring the BLOBS an error
> message appears stating the BLOBS couldn't be restored. I don't have the
> exact text of the message but I could get it for you if needed. I even
> created a test database with one table and two fields. The fields were
> recordid and logo (the LO type field). I couldn't even get this database to
> restore using PGAdmin III. The point here is that it doesn't matter which
> server I tried to restore too or which database I used (as long as it had at
> least one large object stored in it), if I used PGAdmin III, the same error
> message appeared at the same place in the process. However, if I restored
> the backup by opening a command or terminal window and ran the command from
> the command line, it worked. You should have no problem reproducing the same
> error message that I received. If you don't see the same problem, let me
> know and the next time I go to do a restore I'll get the details for you.
> 
> By the way, when I put the backup file on one of the Macs and then ran the
> restore using the command line from the Mac Terminal window I was only
> prompted for a password once. However, when restoring the backup onto the
> Windows 2003 server I was prompted for the password at the beginning of the
> process and then just before restoring the BLOBs. Don't know how this might
> be related by I thought I would let you know.
> 
> If you are unable to reproduce the problem by simply attempting to restore a
> backup of a database that has some LO data stored in it, let me know and
> I'll start from scratch and send you all the details that I can come up
> with.
> 
> Patrick Headley
> Linx Consulting, Inc.
> (303) 916-5522
> LinxConsulting(at)comcast(dot)net
> www.linxco-inc.com 
> -----Original Message-----
> From: Tom Lane [mailto:tgl(at)sss(dot)pgh(dot)pa(dot)us] 
> Sent: Tuesday, April 11, 2006 2:14 PM
> To: Patrick Headley
> Cc: pgsql-bugs(at)postgresql(dot)org
> Subject: Re: [BUGS] BUG #2386: pg_restore doesn't restore large objects 
> 
> "Patrick Headley" <LinxConsulting(at)comcast(dot)net> writes:
> > Description:        pg_restore doesn't restore large objects
> 
> At no point did you show us exactly what you did or exactly what went
> wrong, so even though this report has a lot of version-number details,
> it's just about useless :-(.  Please see the reporting suggestions at
> http://www.postgresql.org/docs/8.1/static/bug-reporting.html
> 
> 			regards, tom lane
> 
> 
> ---------------------------(end of broadcast)---------------------------
> TIP 2: Don't 'kill -9' the postmaster
> 

-- 
  Bruce Momjian   http://candle.pha.pa.us
  EnterpriseDB    http://www.enterprisedb.com

  + If your life is a hard drive, Christ can be your backup. +

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