What I want to do is create a Serialize type for storing Java objects.
The text would be the class name and the Oid would point to the record
where the object is stored. I need the class name and not the Oid of the
table because of a problem I have with long class names (> 32
characters).
If I figure out how to make this a "varlena" value would variable then
work
for the length specification in the create type command?
Are there any examples of varlena user types I could look at?
Thanks,
Ken
> Ken K <kenmail@telocity.com> writes:
>> I am trying to create a user defined type with 2 fields
>> in it, a text* and an Oid. I am not sure what size to
>> use in the create type command. When I try variable
>> the back end core dumps. Are there any examples for
>> doing this sort of thing? Is it even doable?
>
>You can't use any kind of pointer in a datatype --- what is it going to
>point to? There's nothing it could point at that might live as long as
>the datavalue on disk will.
>
>You could embed a TEXT value into a larger varlena value, say
>
> <total length word>
> Oid
> <text value here, beginning with its own length word>
>
>
> regards, tom lane
