Обсуждение: Importing large objects from the client side programatically.

I am using C++ and trying to programatically import a large object
from the client side into a server. I am using QT and, for the server
side I can pass a command like:
insert into x values('x1',lo_import('c:/temp/x1.txt'));
Which works.

However this will not work from the client side.
For the client side there is a psql function \lo_import that works if
I run psql and do something like:
\lo_import('c:/temp/x1.txt')
insert into x values('x1',:LASTOID);

I understand the function \lo_import first sends the data to the
server and then creates the blob returning the oid of it.

How can I do this in an SQL query?

Do I have to write a function on the server in psql using commands like
\lo_import('c:/temp/x1.txt')
insert into x values('x1',:LASTOID);

and then call this in an sql statement?

Will this work or what do people usually do?

Thanks for any help


Andrew



--
___________________________________________
Andrew J. P. Maclean
Centre for Autonomous Systems
The Rose Street Building J04
The University of Sydney  2006  NSW
AUSTRALIA
Ph: +61 2 9351 3283
Fax: +61 2 9351 7474
URL: http://www.acfr.usyd.edu.au/
___________________________________________

    Andrew Maclean wrote:

> I am using C++ and trying to programatically import a large
> object from the client side into a server.

In that context, the simplest way is to use libpq's C functions:
http://www.postgresql.org/docs/8.3/static/lo-interfaces.html

Best regards,
--
 Daniel
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