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Re: BUG #2223: Misleading info in docs on volatility level of functions

From: "Jim C(dot) Nasby" <jnasby(at)pervasive(dot)com>
To: dueyduey(at)freemail(dot)hu
Cc: pgsql-bugs(at)postgresql(dot)org
Subject: Re: BUG #2223: Misleading info in docs on volatility level of functions
Date: 2006-01-31 00:32:51
Message-ID: 20060131003251.GP3920@pervasive.com (view raw or flat)
Thread:
Lists: pgsql-bugspgsql-patches
This was recently discussed on -docs and I believe a patch was applied
to at least HEAD.

On Mon, Jan 30, 2006 at 10:33:35AM +0000, dueyduey(at)freemail(dot)hu wrote:
> 
> The following bug has been logged online:
> 
> Bug reference:      2223
> Logged by:          
> Email address:      dueyduey(at)freemail(dot)hu
> PostgreSQL version: 8.1
> Operating system:   linux
> Description:        Misleading info in docs on volatility level of functions
> Details: 
> 
> Hi, all!
> The documentation on how to and why declare a function STABLE or IMMUTABLE
> is very laconic. It makes clear what promises I make when determining the
> volatility of my functions but it fails to point out what exactly I can
> expect in turn for my promises.
> See also the discussion on bug#2150 on the pgsql-bugs list.
> Thanks for bothering.
> 
> ---------------------------(end of broadcast)---------------------------
> TIP 9: In versions below 8.0, the planner will ignore your desire to
>        choose an index scan if your joining column's datatypes do not
>        match
> 

-- 
Jim C. Nasby, Sr. Engineering Consultant      jnasby(at)pervasive(dot)com
Pervasive Software      http://pervasive.com    work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf       cell: 512-569-9461

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