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Re: Railroad diagrams, a-la sqlite

From: Joseph Conway <mail(at)joeconway(dot)com>
To: Thom Brown <thombrown(at)gmail(dot)com>
Cc: Dave Page <dpage(at)pgadmin(dot)org>, Steve Atkins <steve(at)blighty(dot)com>, pgsql-docs <pgsql-docs(at)postgresql(dot)org>
Subject: Re: Railroad diagrams, a-la sqlite
Date: 2010-07-17 20:30:48
Message-ID: 4C4212F8.1080704@joeconway.com (view raw or flat)
Thread:
Lists: pgsql-docs
On 7/17/10 1:26 PM, Thom Brown wrote:
> On 17 July 2010 21:23, Dave Page <dpage(at)pgadmin(dot)org> wrote:
>> On Sat, Jul 17, 2010 at 9:19 PM, Thom Brown <thombrown(at)gmail(dot)com> wrote:
>>> While they're quite attractive, I actually see them being more
>>> confusing than helpful personally, but I could be wrong.  I reckon
>>> there might be clearer ways of representing statement options.  The
>>> real problems with the railroad design come when there are lots of
>>> references to other diagrams, and you end up with about 10 just for 1
>>> statement.
>>>
>>> Is there a way of testing their usefulness?
>>
>> Personal experience? I used to find them quite useful when I was
>> starting out with Informix.
>>
> 
> I guess I'm quite used to the existing statement definitions.  It's an
> elegant idea, just wondering if it scales sanely.  Are the examples of
> more complex statements?

Oracle SELECT:

http://download.oracle.com/docs/cd/B14117_01/server.101/b10759/statements_10002.htm

Joe

-- 
Joe Conway
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