Re: difference between current_timestamp and now() in quotes

On Thursday 22 January 2009 8:16:46 am Alvaro Herrera wrote:
> Grzegorz Jaśkiewicz escribió:
> > test2=# insert into dupa(a) select 'current_timestamp' from
> > generate_series(1,100);
> > ERROR: date/time value "current" is no longer supported
> > LINE 1: insert into dupa(a) select 'current_timestamp' from generate...
> > ^
> > test2=# insert into dupa(a) select 'now()' from generate_series(1,100);
> > INSERT 0 100
> >
> >
> > Any ideas why the difference ?
>
> The parser handles CURRENT_TIMESTAMP (and others) specially, and doesn't
> recognize it in quotes. I don't know why 'now()' works; I think it is a
> literal of type unknown. I guess it's expanded to the actual value in
> later parsing stages.
>
> --
> Alvaro Herrera http://www.CommandPrompt.com/
> PostgreSQL Replication, Consulting, Custom Development, 24x7 support

At least on 8.2 'now()' does not work either at least not in the way I think
you want. I get:

test=# SELECT 'now()';
?column?
----------
now()
(1 row)

--
Adrian Klaver
aklaver(at)comcast(dot)net