[libpq++ with gcc egcs-2.91.66 (egcs-1.1.2 release) on RH linux 5.1
with Postgres 6.5.]
I've seen in the manual that one can create a table with a class/table
as one of the columns, e.g.:
--set (complex) attribute may be of the same type as the --relation being defined (as here) or of a different
complex --type. The type must exist in the "pg_type" catalog or be --the one currently being defined. --
create table newemp (name text, manager newemp)
and I have been able to do this in psql.
But what does this really mean? And how does one insert or extract
data from such a column? And what is it good for? It seems like
maybe a powerful facility, but I really don't understand it.
Is this sort-of the same as inheriting from that class?
Does anyone have examples of its use?
Thanks,George
George Young, Rm. L-204 gry@ll.mit.edu
MIT Lincoln Laboratory
244 Wood St.
Lexington, Massachusetts 02420-9108 (781) 981-2756
