Scott Bailey <arta...@comcast.net> writes:
> I'm trying to better understand the internals of Postgres, and I'm 
> looking at the enum type. The docs say that an enum value is stored on 
> disk as 4 bytes. But enum_send() returns a bytea representing the actual 
> text of the value and not the index of that value.  So what step am I 
> missing here?

The wire format isn't necessarily the on-disk format.  In this case
we concluded that the internal OID value wouldn't be of any use to
clients.

> Also, is there a way to see the raw data for the tuple on a page?

Try contrib/pageinspect, and read
http://developer.postgresql.org/pgdocs/postgres/storage-page-layout.html

                        regards, tom lane

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