"Marion McKelvie" <marion(at)streamlet(dot)co(dot)uk> writes:
> Many thanks - you're right, the references are stored (by the application
> using the database) in a column of type text.
Yuck :-(. A possible solution is to dump the schema and data separately
(schema in a plain text dump, data in an -Fc or -Ft dump since plain
text doesn't support dumping LOs). Then manually edit the schema file
to change the column data type to "oid". Then load. I honestly am not
sure that this will work cleanly, but it's worth trying --- and if it
doesn't work, please let me know where it goes wrong.
regards, tom lane