Re: [GENERAL] psql lo_export documentation

Jorgen Austvik wrote:
>
> The 8.3 psql documentation says this about lo_export:
>

[...]
> <term><literal>\lo_export <replaceable
[...]
> Note that this is subtly different from the server function
> <function>lo_export</function>, which acts with the permissions
> of the user that the database server runs as and on the server's
> file system.

> Below is an error message I get when I try to use lo_export
> from client:
>
> other_database=> SELECT lo_export(16391, '/tmp/file') FROM
> lotest_stash_values;
> ERROR: must be superuser to use server-side lo_export()
> HINT: Anyone can use the client-side lo_export() provided by libpq.
>
> With experiments I find that lo_export on 8.3 stores the files on the
> database server file system. I also think it would be good if the
> documentation said that you need to be database superuser to use this

I think you are confusing lo_export(), the server function, and \lo_export, the psql command.

See the documentation you quoted above and also http://www.postgresql.org/docs/8.2/static/lo-funcs.html

The function writes to a file on the database server, while the psql command writes to a file on the database client.

The behaviour has not changed in 8.3, as far as I know.

Yours,
Laurenz Albe

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