在SELECT查询中可以使用的查询大小是否受到限制？我有一个很长的SELECT查询（在下面发布），该查询不断抛出QueryBadFormed错误。我已经在sparql.org上验证了查询，并且在三元组商店中运行了查询。我正在使用GraphDB 8.6 SE。查询运行正常。
代码：
from SPARQLWrapper import SPARQLWrapper, SPARQLWrapper2, JSON, CSV, TSV
# set endpoint and query
endpoint = r"http://localhost:7200/repositories/EDR"
query = get_dental_procedures_query() # return query below
# get results from endpoint
sparql = SPARQLWrapper(endpoint)
setReturnFormat(JSON) # I've also tried CSV and TSV
sparql.setQuery(query)
results = sparql.query().convert()
返回错误：
SPARQLWrapper.SPARQLExceptions.QueryBadFormed: QueryBadFormed: a bad request has been sent to the endpoint, probably the sparql query is bad formed.
以下是查询：
BASE <http://purl.regenstrief.org/NDPBRN/dental-practice/>
PREFIX mesial_surface: <http://purl.obolibrary.org/obo/FMA_no_fmaid_Mesial_surface_enamel_of_tooth>
PREFIX exception: <http://purl.obolibrary.org/obo/OHD_0000404>
PREFIX ada_num: <http://purl.obolibrary.org/obo/OHD_0000065>
PREFIX occurrence_date: <http://purl.obolibrary.org/obo/OHD_0000015>
PREFIX owl: <http://www.w3.org/2002/07/owl#>
PREFIX resin_filling_proc: <http://purl.obolibrary.org/obo/OHD_0000042>
PREFIX birth_date: <http://purl.obolibrary.org/obo/OHD_0000050>
PREFIX restored_buccal: <http://purl.obolibrary.org/obo/OHD_0000222>
PREFIX caries_finding: <http://purl.obolibrary.org/obo/OHD_0000024>
PREFIX dental_finding: <http://purl.obolibrary.org/obo/OHD_0000010>
PREFIX molar: <http://purl.obolibrary.org/obo/FMA_55638>
PREFIX male_gender_role: <http://purl.obolibrary.org/obo/OMRSE_00000007>
PREFIX endodontically_restored_tooth: <http://purl.obolibrary.org/obo/0000236>
PREFIX root_canal_treatment: <http://purl.obolibrary.org/obo/OHD_0000230>
PREFIX has_part: <http://purl.obolibrary.org/obo/BFO_0000051>
PREFIX gender_role: <http://purl.obolibrary.org/obo/OMRSE_00000007>
PREFIX part_of: <http://purl.obolibrary.org/obo/BFO_0000050>
PREFIX inheres_in: <http://purl.obolibrary.org/obo/BFO_0000052>
PREFIX missing_tooth_finding: <http://purl.obolibrary.org/obo/OHD_0000026>
PREFIX pbrn_id: <http://purl.obolibrary.org/obo/OHD_0000273>
PREFIX distal_surface: <http://purl.obolibrary.org/obo/FMA_no_fmaid_Distal_surface_enamel_of_tooth>
PREFIX has_output: <http://purl.obolibrary.org/obo/OBI_0000299>
PREFIX occlusal_surface: <http://purl.obolibrary.org/obo/FMA_no_fmaid_Occlusal_surface_enamel_of_tooth>
PREFIX incisor: <http://purl.obolibrary.org/obo/FMA_12823>
PREFIX graph: <http://purl.regenstrief.org/NDPBRN/dental-practice#>
PREFIX patient_role: <http://purl.obolibrary.org/obo/OHD_0000190>
PREFIX anterior_tooth: <http://purl.obolibrary.org/obo/OHD_0000307>
PREFIX resin: <http://purl.obolibrary.org/obo/OHD_0000036>
PREFIX restored_lingual: <http://purl.obolibrary.org/obo/OHD_0000226>
PREFIX dental_proc: <http://purl.obolibrary.org/obo/OHD_0000002>
PREFIX restored_surface: <http://purl.obolibrary.org/obo/OHD_0000208>
PREFIX extracoronally_restored_tooth: <http://purl.obolibrary.org/obo/0000238>
PREFIX lingual_surface: <http://purl.obolibrary.org/obo/FMA_no_fmaid_Lingual_surface_enamel_of_tooth>
PREFIX dentition: <http://purl.obolibrary.org/obo/FMA_75152>
PREFIX sesame: <http://www.openrdf.org/schema/sesame#>
PREFIX lesion: <http://purl.obolibrary.org/obo/OHD_0000021>
PREFIX labial_surface: <http://purl.obolibrary.org/obo/FMA_no_fmaid_Labial_surface_enamel_of_tooth>
PREFIX has_input: <http://purl.obolibrary.org/obo/OBI_0000293>
PREFIX posterior_tooth: <http://purl.obolibrary.org/obo/OHD_0000308>
PREFIX extraction_proc: <http://purl.obolibrary.org/obo/OHD_0000057>
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX restored_occlusal: <http://purl.obolibrary.org/obo/OHD_0000228>
PREFIX is_about: <http://purl.obolibrary.org/obo/IAO_0000136>
PREFIX restored_labial: <http://purl.obolibrary.org/obo/OHD_0000225>
PREFIX coronally_restored_tooth: <http://purl.obolibrary.org/obo/0000237>
PREFIX patient: <http://purl.obolibrary.org/obo/OHD_0000012>
PREFIX prop: <http://purl.regenstrief.org/NDPBRN/property/>
PREFIX restoration_proc: <http://purl.obolibrary.org/obo/OHD_0000004>
PREFIX last_visit_date: <http://purl.obolibrary.org/obo/OHD_0000219>
PREFIX tooth: <http://purl.obolibrary.org/obo/FMA_12516>
PREFIX intracoronally_restored_tooth: <http://purl.obolibrary.org/obo/0000239>
PREFIX bearer_of: <http://purl.obolibrary.org/obo/BFO_0000053>
PREFIX first_visit_date: <http://purl.obolibrary.org/obo/OHD_0000218>
PREFIX surgically_modified_tooth: <http://purl.obolibrary.org/obo/0000231>
PREFIX canine: <http://purl.obolibrary.org/obo/FMA_55636>
PREFIX facial_surface: <http://purl.obolibrary.org/obo/FMA_no_fmaid_Facial_surface_enamel_of_tooth>
PREFIX restored_distal: <http://purl.obolibrary.org/obo/OHD_0000223>
PREFIX premolar: <http://purl.obolibrary.org/obo/FMA_55637>
PREFIX restored_tooth: <http://purl.obolibrary.org/obo/OHD_0000189>
PREFIX restored_facial: <http://purl.obolibrary.org/obo/OHD_0000235>
PREFIX material: <http://purl.obolibrary.org/obo/OHD_0000000>
PREFIX missing_tooth_num: <http://purl.obolibrary.org/obo/OHD_0000234>
PREFIX buccal_surface: <http://purl.obolibrary.org/obo/FMA_no_fmaid_Buccal_surface_enamel_of_tooth>
PREFIX realizes: <http://purl.obolibrary.org/obo/BFO_0000055>
PREFIX female_gender_role: <http://purl.obolibrary.org/obo/OMRSE_00000008>
PREFIX restored_mesial: <http://purl.obolibrary.org/obo/OHD_0000227>
PREFIX restored_incisal: <http://purl.obolibrary.org/obo/OHD_0000224>
PREFIX visit: <http://purl.obolibrary.org/obo/OHD_0000009>
PREFIX obo: <http://purl.obolibrary.org/obo/>
PREFIX incisal_surface: <http://purl.obolibrary.org/obo/FMA_no_fmaid_Incisal_surface_enamel_of_tooth>
SELECT DISTINCT ?practice ?patient_id ?gender ?dob ?first_visit ?last_visit ?tooth_id ?tooth_num ?first_PCR ?first_RCT ?event_name ?ada_code ?event_date ?extract_date ?missing_date (if(bound(?surface_m), 1, 0) AS ?m) (if(bound(?surface_o), 1, 0) AS ?o) (if(bound(?surface_d), 1, 0) AS ?d) (if(bound(?surface_b), 1, 0) AS ?b) (if(bound(?surface_l), 1, 0) AS ?l) (if(bound(?surface_f), 1, 0) AS ?f) (if(bound(?surface_incisal), 1, 0) AS ?i)
WHERE
{ ?patient_i a patient: ;
birth_date: ?dob ;
pbrn_id: ?pbrn_id
OPTIONAL
{ ?gender_t rdfs:subClassOf male_gender_role: ;
rdfs:label ?gender_name .
?gender_i sesame:directType ?gender_t ;
inheres_in: ?patient_i
}
?patient_i first_visit_date: ?first_visit ;
last_visit_date: ?last_visit .
?tooth_t rdfs:subClassOf tooth: ;
ada_num: ?ada_num .
?tooth_i sesame:directType ?tooth_t
OPTIONAL
{ ?tooth_i prop:first_PCR_date ?first_PCR }
OPTIONAL
{ ?tooth_i prop:first_RCT_date ?first_RCT }
OPTIONAL
{ ?tooth_i prop:extraction_date ?extract_date }
OPTIONAL
{ ?tooth_i prop:missing_tooth_finding_date ?missing_date }
?event_t rdfs:subClassOf dental_proc: ;
rdfs:label ?event_name .
?event_i sesame:directType ?event_t ;
has_input: ?patient_i ;
has_output: ?tooth_i ;
occurrence_date: ?event_date ;
prop:ada_code ?ada_code
OPTIONAL
{ ?event_i has_output: ?surface_m .
?surface_m sesame:directType restored_mesial: ;
part_of: ?tooth_i
}
OPTIONAL
{ ?event_i has_output: ?surface_o .
?surface_o sesame:directType restored_occlusal: ;
part_of: ?tooth_i
}
OPTIONAL
{ ?event_i has_output: ?surface_d .
?surface_d sesame:directType restored_distal: ;
part_of: ?tooth_i
}
OPTIONAL
{ ?event_i has_output: ?surface_b .
?surface_b sesame:directType restored_buccal: ;
part_of: ?tooth_i
}
OPTIONAL
{ ?event_i has_output: ?surface_l .
?surface_l sesame:directType restored_lingual: ;
part_of: ?tooth_i
}
OPTIONAL
{ ?event_i has_output: ?surface_f .
?surface_f sesame:directType restored_facial: ;
part_of: ?tooth_i
}
OPTIONAL
{ ?event_i has_output: ?surface_incisal .
?surface_incisal
sesame:directType restored_incisal: ;
part_of: ?tooth_i
}
BIND(strafter(str(?tooth_i), "tooth/") AS ?tooth_id)
BIND(strafter(str(?patient_i), "patient/") AS ?patient_id)
BIND(strbefore(str(?gender_name), " ") AS ?gender)
BIND(strafter(str(?ada_num), "Tooth ") AS ?tooth_num)
BIND(strafter(str(?pbrn_id), "NDPBRN practice ") AS ?practice)
}
limit 5
答案 0 :(得分：2)
对长时间查询使用POST HTTP方法：
sparql.setMethod('POST')
更多信息：https://www.w3.org/TR/sparql11-protocol/#query-operation
对于您而言，限制似乎与urllib2有关。似乎上述方法也不适用于SPARQLWrapper2()。