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Message-ID: <fc048bcb0704101807p3c35e608p2d270c9fe3f4f73b@mail.gmail.com>
Date: Tue, 10 Apr 2007 21:07:29 -0400
From: "Steve Morin" <steve.morin@gmail.com>
To: derby-dev@db.apache.org
Subject: Re: Database implementation help
In-Reply-To: <x1ox1wirbuly.fsf@sun.com>
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References: <fc048bcb0704051842o6cf2cd7vf931dbb89be24958@mail.gmail.com>
	 <x1o3odm0la1a.fsf@sun.com> <x1ox1wirbuly.fsf@sun.com>

Thanks for the help
Steve

On 4/10/07, Dag H. Wanvik <Dag.Wanvik@sun.com> wrote:
> Dyre.Tjeldvoll@Sun.COM writes:
>
> > As for paper/book. I guess that if you order a copy of the SQL
> > standard (with complete grammar) from ISO (www.iso.org) and get the manual
> > for JavaCC you should have pretty much what you need. At least to get
> > started...
> >
> > Wild idea: Maybe you could write a script which converts the grammar
> > decription in the standard into a JavaCC grammar representation?
>
> A caveat: typically, a descriptive grammar needs to be tweaked (often
> a lot) to be useful as an input to parser generators, though, due to
> grammar class restrictions. JavaCC is of type LL(k),
> cf. http://en.wikipedia.org/wiki/Category:Parsing_algorithms
>
> How far the ISO SQL grammar is from being LL(k) "out of the box", I
> don't know.
>
> Thanks,
> Dag
>