Thanks to all who responded.
Found the pg_dumplo tool in contrib which did exactly what I needed.
On Wed, 2004-02-18 at 05:54, Jeff Boes wrote:
> At some point in time, wlittle(at)securitylending(dot)com (Warren Little) wrote:
> >I migrated my database from 7.3 to 7.4 this weekend using the pg_dumpall
> >tool which I now realize does not capture blobs.
> >I now need to move only the blob data to the 7.4 database.
> >The problem with redoing the dump with pg_dump -b is the database is now
> >in production and writing over the top of changes to the database is not
> >exceptable. The blob data is very static so if there was some way to
> >copy the physical files from disk and modify some records in the system
> >tables to properly locate the blob records that would be best. Another
> >option I was looking at was to restore the archived database with the
> >blobs intact and then restore the production version over the top
> >without destroying the blob data.
> In a similar situation, we wrote a script that constructs "\lo_export" commands
> to dump each large object to a file. The file name for each contains the
> information needed to reconstruct the object at the other end. For instance, if
> you have a table like this:
> CREATE TABLE foobar (primary_id INTEGER PRIMARY KEY, large_obj OID, ...)
> you'd want a series of commands that look like this:
> \lo_export <large_obj> <primary_id>.dmp
> Then, given a directory full of such files, you construct another series of
> commands that look like this:
> \lo_import <primary_id>.dmp
> UPDATE foobar SET large_obj = <new_value> WHERE primary_id = <primary_id>;
> The trick is capturing the output of the \lo_import command and parsing it to
> get the large object OID after it is created.
> I don't know if I have permission to post or email the script, but if you
> contact me offline I should know by then.
> jboes at n/e/x/c/e/r/p/t/d/o/t/c/o/m
> ~~~~~~~~~~~~~~~~| Genius may have its limitations, but stupidity is not
> Jeff Boes | thus handicapped.
> jboes(at)qtm(dot)net | --Elbert Hubbard (1856-1915), American author
> ---------------------------(end of broadcast)---------------------------
> TIP 3: if posting/reading through Usenet, please send an appropriate
> subscribe-nomail command to majordomo(at)postgresql(dot)org so that your
> message can get through to the mailing list cleanly
Senior Vice President
Security Lending Wholesale, LC
In response to
pgsql-admin by date
|Next:||From: Priya G||Date: 2004-02-18 18:40:46|
|Previous:||From: GP||Date: 2004-02-18 15:21:15|
|Subject: PL/pgSQL instalLation problem ??|