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Thread: DEFAULT in

DEFAULT in

From
Neil Conway
Date:
Folks,

While browsing through the SQL spec (200x draft), I noticed the
following:

<set clause list> (the list of SET expressions in an UPDATE statement;
section 14.12) allows a <contextually typed value specification> on the
right-hand side of SET assignments. One of the possibilities for a
<contextually typed value specification> is DEFAULT (section 6.5).

In other words, this syntax should be legal:

UPDATE sometable SET somecolumn = DEFAULT;

but it doesn't appear to be implemented as of CVS tip.

Any comments?

Cheers,

Neil

Re: DEFAULT in

From
"Christopher Kings-Lynne"
Date:
> <set clause list> (the list of SET expressions in an UPDATE statement;
> section 14.12) allows a <contextually typed value specification> on the
> right-hand side of SET assignments. One of the possibilities for a
> <contextually typed value specification> is DEFAULT (section 6.5).
>
> In other words, this syntax should be legal:
>
> UPDATE sometable SET somecolumn = DEFAULT;
>
> but it doesn't appear to be implemented as of CVS tip.

Hmmm...I ran into a situation where I wanted that just the other day.
INSERT INTO...SELECT FROM kind of thing...

Chris

Re: DEFAULT in

From
Rod Taylor
Date:
I'll look into it...

On Mon, 2003-03-24 at 20:14, Christopher Kings-Lynne wrote:
> > <set clause list> (the list of SET expressions in an UPDATE statement;
> > section 14.12) allows a <contextually typed value specification> on the
> > right-hand side of SET assignments. One of the possibilities for a
> > <contextually typed value specification> is DEFAULT (section 6.5).
> >
> > In other words, this syntax should be legal:
> >
> > UPDATE sometable SET somecolumn = DEFAULT;
> >
> > but it doesn't appear to be implemented as of CVS tip.
>
> Hmmm...I ran into a situation where I wanted that just the other day.
> INSERT INTO...SELECT FROM kind of thing...
>
> Chris
--
Rod Taylor <rbt@rbt.ca>

PGP Key: http://www.rbt.ca/rbtpub.asc

Re: DEFAULT in

From
Bruce Momjian
Date:
Added to TODO:
* Allow UPDATE to use SET col = DEFAULT

---------------------------------------------------------------------------

Rod Taylor wrote:
-- Start of PGP signed section.
> I'll look into it...
> 
> On Mon, 2003-03-24 at 20:14, Christopher Kings-Lynne wrote:
> > > <set clause list> (the list of SET expressions in an UPDATE statement;
> > > section 14.12) allows a <contextually typed value specification> on the
> > > right-hand side of SET assignments. One of the possibilities for a
> > > <contextually typed value specification> is DEFAULT (section 6.5).
> > >
> > > In other words, this syntax should be legal:
> > >
> > > UPDATE sometable SET somecolumn = DEFAULT;
> > >
> > > but it doesn't appear to be implemented as of CVS tip.
> > 
> > Hmmm...I ran into a situation where I wanted that just the other day.
> > INSERT INTO...SELECT FROM kind of thing...
> > 
> > Chris
> -- 
> Rod Taylor <rbt@rbt.ca>
> 
> PGP Key: http://www.rbt.ca/rbtpub.asc
-- End of PGP section, PGP failed!

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