Re: grouping by expressions

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.


Received on Wednesday, 3 November 2010 16:34:32 UTC