Re: quote_literal with NULL

On Wed, 2007-10-10 at 10:12 -0500, Kevin Grittner wrote:
> >>> On Wed, Oct 10, 2007 at  4:57 AM, in message
> <37ed240d0710100257r149a8d2cmb671b69a1673eb54@mail.gmail.com>, "Brendan Jurd"
> <direvus@gmail.com> wrote: 
> > On 10/10/07, Simon Riggs <simon@2ndquadrant.com> wrote:
> >> On Wed, 2007-10-10 at 14:57 +1000, Brendan Jurd wrote:
> >>
> >> > Wouldn't it be more useful if quote_literal(NULL) yielded the text value 
> > 'NULL'?
> >>
> >> I don't think you can change that now. There could be code out there
> >> that relies on that behaviour.
> >>
> > 
> > Bummer.  But I take your point.  If there's a good chance someone is
> > going to have their application murdered by a change here, best to
> > leave it alone.
>  
> In particular, it seems like exactly what you would want for values
> you're going to use in an INSERT or the SET clause of an UPDATE.

Perhaps have quote_nullable() then as well?

You then use quote_nullable() in INSERT and UPDATE SET clauses and
quote_literal() in SELECT WHERE clauses. 

--  Simon Riggs 2ndQuadrant  http://www.2ndQuadrant.com