HI Nicola,
Are you able to provide a test case we can setup locally to demonstrate this
issue ?
Best Regards
Hugh Williams
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> On 4 Apr 2015, at 19:49, Nicola Vitucci <nicola.vitu...@gmail.com> wrote:
>
> Hi all,
>
> I think that SPARQL queries using property paths which include the plus
> sign yield incorrect results. This is what I get with the following
> queries (number of results between brackets):
>
> SELECT DISTINCT ?scl WHERE {wd:Q3336843 rdfs:subClassOf* ?scl} (25 rows)
> SELECT DISTINCT ?scl WHERE {wd:Q3336843 rdfs:subClassOf+ ?scl} (4 rows)
>
> SELECT DISTINCT ?scl WHERE {wd:Q3336843 rdfs:subClassOf{1,} ?scl} (24 rows)
> SELECT DISTINCT ?scl WHERE {wd:Q3336843 rdfs:subClassOf{2,} ?scl} (20 rows)
> SELECT DISTINCT ?scl WHERE {wd:Q3336843 rdfs:subClassOf{3,} ?scl} (17 rows)
> ...
>
> This is the output of EXPLAIN on the first and second queries (the
> latter 3 have apparently the same plan as the first one):
>
> ----------------------------
> {
>
> Precode:
> 0: __all_eq := Call __all_eq ( #/Q3336843 )
> 5: BReturn 0
> Transitive dt dir 1, input: (__all_eq)
> input shadow: (ZÁ^D)
> output: (_::trans_obj_1_1)
> {
> RDF_QUAD 1.8 rows(s_1_4_t0.S, s_1_4_t0.O)
> inlined P = ##subClassOf , S = k_ZÁ^D
>
> After code:
> 0: _::trans_subj_1_0 := := artm s_1_4_t0.S
> 4: _::trans_obj_1_1 := := artm s_1_4_t0.O
> 8: BReturn 0
> Subquery Select(_::trans_subj_1_0, _::trans_obj_1_1)
> }
> Distinct (_::trans_obj_1_1)
>
> After code:
> 0: scl := := artm _::trans_obj_1_1
> 4: BReturn 0
> Subquery Select(scl)
>
> After code:
> 0: scl := Call __ro2sq (scl)
> 5: BReturn 0
> Select (scl)
> }
> ----------------------------
>
> ----------------------------
> {
> RDF_QUAD 8 rows(s_1_2_t0.O)
> inlined P = ##subClassOf , S = #/Q3336843
> Distinct (s_1_2_t0.O)
>
> After code:
> 0: scl := := artm s_1_2_t0.O
> 4: BReturn 0
> Subquery Select(scl)
>
> After code:
> 0: scl := Call __ro2sq (scl)
> 5: BReturn 0
> Select (scl)
> }
> ----------------------------
>
> Have you already encountered this issue? I'm using build
> f609f14aa6bdb8ef29d4da038fdb7934c6ca65d7.
>
> Thanks,
>
> Nicola
>
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