Thread: Issues with imported blobs from Postgres 8 to 9
Hi,
I created a database dumb using pg_dump on Postgres 8.3.6. After that I tried to import the same database into a Postgres 9.0 install. Everything worked fine except some image blobs. Some of them seem to be corrupt.
OS: Mac OS X Server 10.5.8. The same issue happened on Mac OS X client 10.6.6.
I downloaded the Postgres 9 version taken from Enterprise DB. I also tried the one from http://www.postgresqlformac.com/ since my initial database was created in Postgres 8 downloaded from there. I had the same issue.
In some forums, it was mentioned that I needed to set bytea_output = 'escape' in the config file. Which I did with no luck even after deleting and importing the DB again.
Any suggestion?
Thanks,
Mahdi
Mahdi Mankai <mahdi.mankai@fuegoondemand.com> writes:
> I created a database dumb using pg_dump on Postgres 8.3.6. After that I tried to import the same database into a
Postgres9.0 install. Everything worked fine except some image blobs. Some of them seem to be corrupt.
I doubt this is a bytea_escape problem. In the first place that would
only affect output from the new server, not input into it; and in the
second place, if that were the issue, it would probably result in *all*
your blobs being messed up not just a small number of them. We need
a lot more details than this to offer any help.
regards, tom lane
Thanks for the reply. What kind of detail can I provide? Mahdi On 2011-02-28, at 6:58 PM, Tom Lane wrote: > Mahdi Mankai <mahdi.mankai@fuegoondemand.com> writes: >> I created a database dumb using pg_dump on Postgres 8.3.6. After that I tried to import the same database into a Postgres9.0 install. Everything worked fine except some image blobs. Some of them seem to be corrupt. > > I doubt this is a bytea_escape problem. In the first place that would > only affect output from the new server, not input into it; and in the > second place, if that were the issue, it would probably result in *all* > your blobs being messed up not just a small number of them. We need > a lot more details than this to offer any help. > > regards, tom lane > > -- > Sent via pgsql-general mailing list (pgsql-general@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-general
Is there a way you can dump the same image in hex format (or even PostgreSQL's own escape format) from both the 8.3.6 and 9.0.X setup (with bytea_escape set to escape) and do a file comparison between the two to at least show that the results are different? As I have not actually ever done this I am only guessing but I would think it should work. If you have a record that IS correctly displaying you can use it as a control. Also, you fail to indicate what GUI and/or middle-tier tools you are using to retrieve and display the image (or save the file locally to display in a viewer). Along the same lines where are you seeing errors related to these images - and what are they? You also say "some" but is that because you have only tested a few or are there some that are coming across just fine? David J. -----Original Message----- From: pgsql-general-owner@postgresql.org [mailto:pgsql-general-owner@postgresql.org] On Behalf Of Mahdi Mankai Sent: Tuesday, March 01, 2011 6:08 AM To: pgsql-general@postgresql.org Subject: Re: [GENERAL] Issues with imported blobs from Postgres 8 to 9 Thanks for the reply. What kind of detail can I provide? Mahdi On 2011-02-28, at 6:58 PM, Tom Lane wrote: > Mahdi Mankai <mahdi.mankai@fuegoondemand.com> writes: >> I created a database dumb using pg_dump on Postgres 8.3.6. After that I tried to import the same database into a Postgres 9.0 install. Everything worked fine except some image blobs. Some of them seem to be corrupt. > > I doubt this is a bytea_escape problem. In the first place that would > only affect output from the new server, not input into it; and in the > second place, if that were the issue, it would probably result in > *all* your blobs being messed up not just a small number of them. We > need a lot more details than this to offer any help. > > regards, tom lane > > -- > Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To > make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-general -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general