Re: date range to set of dates expansion

On 01/19/2012 09:17 AM, Samuel Gendler wrote:
>
>
> On Thu, Jan 19, 2012 at 8:20 AM, Adrian Klaver <adrian(dot)klaver(at)gmail(dot)com
> <mailto:adrian(dot)klaver(at)gmail(dot)com>> wrote:
>
> On Thursday, January 19, 2012 7:59:27 am Gary Stainburn wrote:
> > The following code works in 8.4 but not 8.3.
> > Anyone know why, or what I need to do to change it?
> >
> > SELECT aid, asid,
> > date_range (asdate, afdate)::date AS asdate,
> > acomments
> > FROM availability
> >
> > In 8.4 it returns the expanded dataset as required. In 8.3 I get:
> >
> > ERROR: set-valued function called in context that cannot accept
> a set
> > CONTEXT: PL/pgSQL function "date_range" line 4 at RETURN NEXT
>
> As to why it works in 8.4 vs 8.3
>
> http://www.postgresql.org/docs/8.4/interactive/release-8-4.html
>
> "Support set-returning functions in SELECT result lists even for
> functions that
> return their result via a tuplestore (Tom)
>
> In particular, this means that functions written in PL/pgSQL and
> other PL
> languages can now be called this way.'
>
> In 8.3- I believe you could only call it as
>
> SELECT * from date_range (asdate, afdate)::date AS asdate;
>
>
> I don't think you can have that cast there when it is in the
> from-clause.

That was a cut and paste error on my part, I just copied that line from
the original query.

>

--
Adrian Klaver
adrian(dot)klaver(at)gmail(dot)com