From: | Vince Vielhaber <vev(at)michvhf(dot)com> |
---|---|
To: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PostgreSQL-documentation <pgsql-docs(at)postgresql(dot)org> |
Subject: | Re: Use of 'now' |
Date: | 2001-11-14 10:59:46 |
Message-ID: | Pine.BSF.4.40.0111140553380.84965-100000@paprika.michvhf.com |
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Thread: | |
Lists: | pgsql-docs pgsql-hackers |
On Tue, 13 Nov 2001, Bruce Momjian wrote:
> > > Seems it is still in there somewhere:
> > >
> > > test=> create table bb (x timestamp default 'current', y int);
> > > CREATE
> > > test=> insert into bb (y) values (1);
> > > INSERT 16591 1
> > > test=> select * from bb;
> > > x | y
> > > -------------------------------+---
> > > 2001-11-13 21:45:22.473896-05 | 1
> > > (1 row)
> > >
> > > Do you mean that 'current' is now the same as 'now'? :-)
> >
> > ISTM that 'current' when used as a default meant the time the table
> > was created but now() would (as one woule expect) return the current
> > datetime.
>
> You would think so, but in fact 'current' does change for each insert:
>
> test=> create table dd (x timestamp default 'current', y int);
> CREATE
> test=> insert into dd (y) values (1);
> INSERT 16596 1
> test=> insert into dd (y) values (1);
> INSERT 16597 1
> test=> select * from dd;
> x | y
> -------------------------------+---
> 2001-11-13 22:39:18.283834-05 | 1
> 2001-11-13 22:39:19.196797-05 | 1
> (2 rows)
>
>
Or this:
PostgreSQL 7.0.3 on i386-unknown-freebsdelf4.2, compiled by gcc 2.95.2
(1 row)
template1=# create table dd (x timestamp default 'current', y int);
CREATE
template1=# insert into dd (y) values (1);
INSERT 1407083 1
template1=# insert into dd (y) values (1);
INSERT 1407084 1
template1=# select * from dd;
x | y
---------+---
current | 1
current | 1
(2 rows)
Must be since 7.0.3?
Vince.
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