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Re: date range to set of dates expansion

From: Adrian Klaver <adrian(dot)klaver(at)gmail(dot)com>
To: Samuel Gendler <sgendler(at)ideasculptor(dot)com>
Cc: pgsql-sql(at)postgresql(dot)org, Gary Stainburn <gary(dot)stainburn(at)ringways(dot)co(dot)uk>
Subject: Re: date range to set of dates expansion
Date: 2012-01-19 19:42:12
Message-ID: 4F187214.1010306@gmail.com (view raw or flat)
Thread:
Lists: pgsql-sql
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

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