The psql manual page mentions lo_insert:
LASTOID
The value of the last affected OID, as returned
--> from an INSERT or lo_insert command. This variable
is only guaranteed to be valid until after the
result of the next SQL command has been displayed.
Should that be lo_import? I don't see lo_insert used anywhere. And it
doesn't seem lo_import sets LASTOID.
--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ It's impossible for everything to be true. +