When will the function inheritence be futher development? That Primary keys
work wil on both parent and child table.
Now a use one table and several table with the same foreign keys to that
table. And a function have to do two insert of update actions.
----- Original Message -----
From: "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Hasnul Fadhly bin Hasan" <hasnulfadhly(dot)h(at)mimos(dot)my>
Sent: Tuesday, December 21, 2004 4:45
Subject: Re: [NOVICE] Inheritance
> Hasnul Fadhly bin Hasan <hasnulfadhly(dot)h(at)mimos(dot)my> writes:
> > I'm just wondering, what real benefit does inheritance have? When i
> > create two tables, one inherited from the other,
> > does that mean i have two tables with same duplicate data or actually
> > they are joined in the back end?
> It's more like an implicit UNION ALL. There's no duplication, but when
> you specify a SELECT/UPDATE/DELETE over the parent table, the child
> table is implicitly processed as well.
> regards, tom lane
> ---------------------------(end of broadcast)---------------------------
> TIP 2: you can get off all lists at once with the unregister command
> (send "unregister YourEmailAddressHere" to majordomo(at)postgresql(dot)org)
In response to
pgsql-novice by date
|Next:||From: Lloyd Dieter||Date: 2004-12-21 12:28:25|
|Subject: How to get day of week?|
|Previous:||From: Marcin Gil||Date: 2004-12-21 07:36:47|
|Subject: Re: pg_dumpall with oids/blobs|