Re: can subqueries be executed first in SPARQL?

On Jun 16, 2016, at 4:11 PM, Peter F. Patel-Schneider <pfpschneider@gmail.com> wrote:
> 
> 
>> The wording here is a bit awkward, but I believe the subquery evaluation
>> is still occurring first *within the context of the evaluating the EXISTS
>> pattern*.
> 
> There is no such qualifier in the wording.

Agreed.

>> I think calling out the bottom-up semantics here is a good thing, but the
>> text might have benefited from discussing how evaluating EXISTS patterns
>> is different than evaluating other type of pattern.
> 
> I don't consider calling out something that is not true a good thing.

I am suggesting that qualifying the sentence would be more appropriate than removing it entirely, because in all cases other than sub-selects within EXISTS blocks, it is a true statement (as should be clear from the evaluation semantics).

.greg

Received on Thursday, 16 June 2016 23:18:29 UTC