Re: copy from

Gotcha. Now, if I do an insert and just don't specify that field at all, it
will, use the default value, correct? As long as I don't "touch" the field
with anything it uses the default.

Adam Lang
Systems Engineer
Rutgers Casualty Insurance Company
----- Original Message -----
From: "Stephan Szabo" <sszabo(at)megazone23(dot)bigpanda(dot)com>
To: "Adam Lang" <aalang(at)rutgersinsurance(dot)com>
Cc: <pgsql-sql(at)postgresql(dot)org>
Sent: Tuesday, August 15, 2000 2:00 PM
Subject: Re: [SQL] copy from

>
> Sort of. You can give the field a default value of
> nextval(<sequence>) which means that if you do not specify
> the column in an insert, it automatically gets the default
> value which should be the next value in the sequence.
> Note, that not putting the column is different from inserting a
> NULL into the field.
>
> (Example:
> sszabo=# create sequence xyzseq;
> CREATE
> sszabo=# create table xyzseqtest ( a int default nextval('xyzseq'), b
> int);
> CREATE
> sszabo=# insert into xyzseqtest (b) values (2);
> INSERT 172188 1
> sszabo=# insert into xyzseqtest (b) values (3);
> INSERT 172189 1
> sszabo=# select * from xyzseqtest;
> a | b
> ---+---
> 1 | 2
> 2 | 3
> (2 rows)
> )
>
> There are issues about this dealing with rules and triggers where another
> row may be inserted or the default may be evaluated a second time where
> you want to get the value you just inserted back, but in general it works.
>
> On Tue, 15 Aug 2000, Adam Lang wrote:
>
> > Hmmm... well, I don't think I have an "explicit" nextval. I created the
> > table and then I did a create sequence broker_id;
> >
> > Are you implying that I can set the field to automatically create a
nextval?