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Re: grouping by expressions

From: Gregory Williams <greg@evilfunhouse.com>
Date: Wed, 3 Nov 2010 12:34:01 -0400
Cc: Steve Harris <steve.harris@garlik.com>, SPARQL Working Group <public-rdf-dawg@w3.org>
Message-Id: <C1490702-626E-4EE7-B35C-C44E6EC9EAC9@evilfunhouse.com>
To: Andy Seaborne <andy.seaborne@epimorphics.com>
On Nov 3, 2010, at 9:15 AM, Andy Seaborne wrote:

> But define SELECT * during the algebra translation as only finding variables used in the syntax, and it can't be ?N.
> 
> (ARQ uses illegal variables names so it can easily determine the class of variable later - convenience, not need).
> 
> Greg - how do you do it?

Internally I've got syntactically illegal variables like ?MAX(?x), all of which are renamed later on during query evaluation.

.greg
Received on Wednesday, 3 November 2010 16:34:32 GMT

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