Re: [Bigdata-developers] analytic query mode

[Jeremy J C. <jj...@sy...>]

I added a test case: it gives different answers in analytic and non-analytic mode: neither is correct.

It was harder to find than I remember …

Jeremy J Carroll


> On Apr 29, 2015, at 2:03 PM, Bryan Thompson <br...@sy...> wrote:
> 
> Ok.  Sounds good.
> Bryan
> ----
> Bryan Thompson
> Chief Scientist & Founder
> SYSTAP, LLC
> 4501 Tower Road
> Greensboro, NC 27410
> br...@sy...
> http://blazegraph.com
> http://blog.bigdata.com
> http://mapgraph.io
> 
> Blazegraph™ is our ultra high-performance graph database that supports
> both RDF/SPARQL and Tinkerpop/Blueprints APIs.  MapGraph™ is our
> disruptive new technology to use GPUs to accelerate data-parallel
> graph analytics.
> 
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> 
> On Wed, Apr 29, 2015 at 4:56 PM, Jeremy J Carroll <jj...@sy...> wrote:
>> Thanks, I will try and generate a failing query from that and add it tot he ticket
>> 
>> 
>> 
>> 
>>> On Apr 29, 2015, at 1:51 PM, Bryan Thompson <br...@sy...> wrote:
>>> 
>>> Jeremy,
>>> 
>>> We did fix several issues related to this, but the specific ticket
>>> that you are thinking of is
>>> 
>>>  http://trac.bigdata.com/ticket/490 (Mock IV / TermId
>>> hashCode()/equals() problems)
>>> 
>>> We did add logic to the query plans to do dictionary materialization
>>> in order to resolve the IV for a constructed RDF Value that is in the
>>> dictionary.  This was done as part of
>>> http://trac.bigdata.com/ticket/1118.  Michael (Cc) might recall this
>>> more clearly.  However, I believe the specific issue for #490 still
>>> remains in some circumstances.  We have this tagged in our backlog and
>>> plan to address it shortly.
>>> 
>>> Let me check with Michael and get back to you on the specific issues
>>> that remain and when we think they will be resolved.
>>> 
>>> Thanks,
>>> Bryan
>>> ----
>>> Bryan Thompson
>>> Chief Scientist & Founder
>>> SYSTAP, LLC
>>> 4501 Tower Road
>>> Greensboro, NC 27410
>>> br...@sy...
>>> http://blazegraph.com
>>> http://blog.bigdata.com
>>> http://mapgraph.io
>>> 
>>> Blazegraph™ is our ultra high-performance graph database that supports
>>> both RDF/SPARQL and Tinkerpop/Blueprints APIs.  MapGraph™ is our
>>> disruptive new technology to use GPUs to accelerate data-parallel
>>> graph analytics.
>>> 
>>> CONFIDENTIALITY NOTICE:  This email and its contents and attachments
>>> are for the sole use of the intended recipient(s) and are confidential
>>> or proprietary to SYSTAP. Any unauthorized review, use, disclosure,
>>> dissemination or copying of this email or its contents or attachments
>>> is prohibited. If you have received this communication in error,
>>> please notify the sender by reply email and permanently delete all
>>> copies of the email and its contents and attachments.
>>> 
>>> 
>>> On Wed, Apr 29, 2015 at 4:23 PM, Jeremy J Carroll <jj...@sy...> wrote:
>>>> 
>>>> A long time ago, maybe two years even, analytic query mode had correctness issues to do with literals that were in the query but not in the data or something like that ….
>>>> 
>>>> Are these issues believed resolved?
>>>> 
>>>> 
>>>> IIRC the sort of problem case was e.g:
>>>> 
>>>> 
>>>> select *
>>>> {
>>>> 
>>>> BIND (Concat("Plain","Literal") as ?foo)
>>>> graph ?g
>>>>  { ?s ?p ?foo }
>>>> } LIMIT 20
>>>> 
>>>> 
>>>> where the data includes the graph <http://www.w3.org/1999/02/22-rdf-syntax-ns>
>>>> 
>>>> which includes the triple
>>>> 
>>>> rdf:PlainLiteral rdfs:label “PlainLiteral”
>>>> 
>>>> This now does work both in Analytic mode and not.
>>>> 
>>>> thanks
>>>> 
>>>> Jeremy
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