{"id":"https://openalex.org/W2997745526","doi":"https://doi.org/10.1145/3375395.3387653","title":"The Limits of Efficiency for Open- and Closed-World Query Evaluation Under Guarded TGDs","display_name":"The Limits of Efficiency for Open- and Closed-World Query Evaluation Under Guarded TGDs","publication_year":2020,"publication_date":"2020-05-29","ids":{"openalex":"https://openalex.org/W2997745526","doi":"https://doi.org/10.1145/3375395.3387653","mag":"2997745526"},"language":"en","primary_location":{"id":"doi:10.1145/3375395.3387653","is_oa":false,"landing_page_url":"https://doi.org/10.1145/3375395.3387653","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 39th ACM SIGMOD-SIGACT-SIGAI Symposium on Principles of Database Systems","raw_type":"proceedings-article"},"type":"preprint","indexed_in":["arxiv","crossref","datacite"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://arxiv.org/pdf/1912.12442","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5051683347","display_name":"Pablo Barcel\u00f3","orcid":"https://orcid.org/0000-0003-2293-2653"},"institutions":[],"countries":[],"is_corresponding":true,"raw_author_name":"Pablo Barcelo","raw_affiliation_strings":["PUC Chile & IMFD Chile, Santiago, Chile","PUC Chile & IMFD Chile, Santiago, Chile"],"affiliations":[{"raw_affiliation_string":"PUC Chile & IMFD Chile, Santiago, Chile","institution_ids":[]},{"raw_affiliation_string":"PUC Chile & IMFD Chile, Santiago, Chile","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5057975755","display_name":"V\u00edctor Dalmau","orcid":"https://orcid.org/0000-0002-9365-7372"},"institutions":[{"id":"https://openalex.org/I170486558","display_name":"Pompeu Fabra University","ror":"https://ror.org/04n0g0b29","country_code":"ES","type":"education","lineage":["https://openalex.org/I170486558"]}],"countries":["ES"],"is_corresponding":false,"raw_author_name":"Victor Dalmau","raw_affiliation_strings":["Universitat Pompeu Fabra, Barcelona, Spain","; Universitat Pompeu Fabra, Barcelona, Spain"],"affiliations":[{"raw_affiliation_string":"Universitat Pompeu Fabra, Barcelona, Spain","institution_ids":["https://openalex.org/I170486558"]},{"raw_affiliation_string":"; Universitat Pompeu Fabra, Barcelona, Spain","institution_ids":["https://openalex.org/I170486558"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5055516926","display_name":"Cristina Feier","orcid":null},"institutions":[{"id":"https://openalex.org/I180437899","display_name":"University of Bremen","ror":"https://ror.org/04ers2y35","country_code":"DE","type":"education","lineage":["https://openalex.org/I180437899"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Cristina Feier","raw_affiliation_strings":["University of Bremen, Bremen, Germany","Univ. of Bremen, Bremen, Germany"],"affiliations":[{"raw_affiliation_string":"University of Bremen, Bremen, Germany","institution_ids":["https://openalex.org/I180437899"]},{"raw_affiliation_string":"Univ. of Bremen, Bremen, Germany","institution_ids":["https://openalex.org/I180437899"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5034616829","display_name":"Carsten Lutz","orcid":"https://orcid.org/0000-0002-8791-6702"},"institutions":[{"id":"https://openalex.org/I180437899","display_name":"University of Bremen","ror":"https://ror.org/04ers2y35","country_code":"DE","type":"education","lineage":["https://openalex.org/I180437899"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Carsten Lutz","raw_affiliation_strings":["University of Bremen, Bremen, Germany","Univ. of Bremen, Bremen, Germany"],"affiliations":[{"raw_affiliation_string":"University of Bremen, Bremen, Germany","institution_ids":["https://openalex.org/I180437899"]},{"raw_affiliation_string":"Univ. of Bremen, Bremen, Germany","institution_ids":["https://openalex.org/I180437899"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5067962748","display_name":"Andr\u00e9as Pieris","orcid":"https://orcid.org/0000-0003-4779-3469"},"institutions":[{"id":"https://openalex.org/I98677209","display_name":"University of Edinburgh","ror":"https://ror.org/01nrxwf90","country_code":"GB","type":"education","lineage":["https://openalex.org/I98677209"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Andreas Pieris","raw_affiliation_strings":["University of Edinburgh, Edinburgh, United Kingdom"],"affiliations":[{"raw_affiliation_string":"University of Edinburgh, Edinburgh, United Kingdom","institution_ids":["https://openalex.org/I98677209"]}]}],"institutions":[],"countries_distinct_count":3,"institutions_distinct_count":5,"corresponding_author_ids":["https://openalex.org/A5051683347"],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":{"value":0.00983238,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":"259","last_page":"270"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10215","display_name":"Semantic Web and Ontologies","score":0.9994999766349792,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10215","display_name":"Semantic Web and Ontologies","score":0.9994999766349792,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10317","display_name":"Advanced Database Systems and Queries","score":0.9993000030517578,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11106","display_name":"Data Management and Algorithms","score":0.9988999962806702,"subfield":{"id":"https://openalex.org/subfields/1711","display_name":"Signal Processing"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.5744784474372864},{"id":"https://openalex.org/keywords/conjunctive-query","display_name":"Conjunctive query","score":0.5068276524543762},{"id":"https://openalex.org/keywords/ontology","display_name":"Ontology","score":0.48781469464302063},{"id":"https://openalex.org/keywords/set","display_name":"Set (abstract data type)","score":0.467526912689209},{"id":"https://openalex.org/keywords/bounded-function","display_name":"Bounded function","score":0.45844411849975586},{"id":"https://openalex.org/keywords/theoretical-computer-science","display_name":"Theoretical computer science","score":0.4400377869606018},{"id":"https://openalex.org/keywords/class","display_name":"Class (philosophy)","score":0.437434583902359},{"id":"https://openalex.org/keywords/p","display_name":"P","score":0.42684251070022583},{"id":"https://openalex.org/keywords/data-integrity","display_name":"Data integrity","score":0.41770657896995544},{"id":"https://openalex.org/keywords/context","display_name":"Context (archaeology)","score":0.4107967019081116},{"id":"https://openalex.org/keywords/database","display_name":"Database","score":0.38663002848625183},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.3116127848625183},{"id":"https://openalex.org/keywords/time-complexity","display_name":"Time complexity","score":0.2221660614013672},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.21889302134513855},{"id":"https://openalex.org/keywords/programming-language","display_name":"Programming language","score":0.17210105061531067},{"id":"https://openalex.org/keywords/relational-database","display_name":"Relational database","score":0.08833828568458557},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.07941630482673645}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5744784474372864},{"id":"https://openalex.org/C65647387","wikidata":"https://www.wikidata.org/wiki/Q1781706","display_name":"Conjunctive query","level":3,"score":0.5068276524543762},{"id":"https://openalex.org/C25810664","wikidata":"https://www.wikidata.org/wiki/Q44325","display_name":"Ontology","level":2,"score":0.48781469464302063},{"id":"https://openalex.org/C177264268","wikidata":"https://www.wikidata.org/wiki/Q1514741","display_name":"Set (abstract data type)","level":2,"score":0.467526912689209},{"id":"https://openalex.org/C34388435","wikidata":"https://www.wikidata.org/wiki/Q2267362","display_name":"Bounded function","level":2,"score":0.45844411849975586},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.4400377869606018},{"id":"https://openalex.org/C2777212361","wikidata":"https://www.wikidata.org/wiki/Q5127848","display_name":"Class (philosophy)","level":2,"score":0.437434583902359},{"id":"https://openalex.org/C134026603","wikidata":"https://www.wikidata.org/wiki/Q846354","display_name":"P","level":3,"score":0.42684251070022583},{"id":"https://openalex.org/C33762810","wikidata":"https://www.wikidata.org/wiki/Q461671","display_name":"Data integrity","level":2,"score":0.41770657896995544},{"id":"https://openalex.org/C2779343474","wikidata":"https://www.wikidata.org/wiki/Q3109175","display_name":"Context (archaeology)","level":2,"score":0.4107967019081116},{"id":"https://openalex.org/C77088390","wikidata":"https://www.wikidata.org/wiki/Q8513","display_name":"Database","level":1,"score":0.38663002848625183},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.3116127848625183},{"id":"https://openalex.org/C311688","wikidata":"https://www.wikidata.org/wiki/Q2393193","display_name":"Time complexity","level":2,"score":0.2221660614013672},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.21889302134513855},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.17210105061531067},{"id":"https://openalex.org/C5655090","wikidata":"https://www.wikidata.org/wiki/Q192588","display_name":"Relational database","level":2,"score":0.08833828568458557},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.07941630482673645},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.0},{"id":"https://openalex.org/C138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","level":0,"score":0.0},{"id":"https://openalex.org/C111472728","wikidata":"https://www.wikidata.org/wiki/Q9471","display_name":"Epistemology","level":1,"score":0.0},{"id":"https://openalex.org/C151730666","wikidata":"https://www.wikidata.org/wiki/Q7205","display_name":"Paleontology","level":1,"score":0.0},{"id":"https://openalex.org/C134306372","wikidata":"https://www.wikidata.org/wiki/Q7754","display_name":"Mathematical analysis","level":1,"score":0.0}],"mesh":[],"locations_count":6,"locations":[{"id":"doi:10.1145/3375395.3387653","is_oa":false,"landing_page_url":"https://doi.org/10.1145/3375395.3387653","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 39th ACM SIGMOD-SIGACT-SIGAI Symposium on Principles of Database Systems","raw_type":"proceedings-article"},{"id":"pmh:oai:arXiv.org:1912.12442","is_oa":true,"landing_page_url":"http://arxiv.org/abs/1912.12442","pdf_url":"https://arxiv.org/pdf/1912.12442","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},{"id":"mag:2997745526","is_oa":true,"landing_page_url":"https://arxiv.org/pdf/1912.12442","pdf_url":null,"source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"arXiv (Cornell University)","raw_type":null},{"id":"pmh:oai:pure.ed.ac.uk:openaire/f5544701-7e04-46ba-87bc-eb02401be6f5","is_oa":true,"landing_page_url":"https://www.research.ed.ac.uk/en/publications/f5544701-7e04-46ba-87bc-eb02401be6f5","pdf_url":null,"source":{"id":"https://openalex.org/S4306400321","display_name":"Edinburgh Research Explorer (University of Edinburgh)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I98677209","host_organization_name":"University of Edinburgh","host_organization_lineage":["https://openalex.org/I98677209"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Barcel\u00f3, P, Dalmau, V, Feier, C, Lutz, C & Pieris, A 2020, The Limits of Efficiency for Open- and Closed-World Query Evaluation Under Guarded TGDs. in Proceedings of the 39th ACM SIGMOD-SIGACT-SIGAI Symposium on Principles of Database Systems (PODS 20). Association for Computing Machinery (ACM), pp. 259\u2013270, 2020 ACM SIGMOD/PODS International Conference on Management of Data, Portland, Oregon, United States, 14/06/20. https://doi.org/10.1145/3375395.3387653","raw_type":"contributionToPeriodical"},{"id":"pmh:oai:pure.ed.ac.uk:publications/f5544701-7e04-46ba-87bc-eb02401be6f5","is_oa":true,"landing_page_url":"http://hdl.handle.net/20.500.11820/f5544701-7e04-46ba-87bc-eb02401be6f5","pdf_url":null,"source":{"id":"https://openalex.org/S4406922455","display_name":"Edinburgh Research Explorer","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Barcel\u00f3, P, Dalmau, V, Feier, C, Lutz, C & Pieris, A 2020, The Limits of Efficiency for Open- and Closed-World Query Evaluation Under Guarded TGDs. in Proceedings of the 39th ACM SIGMOD-SIGACT-SIGAI Symposium on Principles of Database Systems (PODS 20). Association for Computing Machinery (ACM), pp. 259\u2013270, 2020 ACM SIGMOD/PODS International Conference on Management of Data, Portland, Oregon, United States, 14/06/20. https://doi.org/10.1145/3375395.3387653","raw_type":"contributionToPeriodical"},{"id":"doi:10.48550/arxiv.1912.12442","is_oa":true,"landing_page_url":"https://doi.org/10.48550/arxiv.1912.12442","pdf_url":null,"source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":null,"raw_source_name":null,"raw_type":"article"}],"best_oa_location":{"id":"pmh:oai:arXiv.org:1912.12442","is_oa":true,"landing_page_url":"http://arxiv.org/abs/1912.12442","pdf_url":"https://arxiv.org/pdf/1912.12442","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":32,"referenced_works":["https://openalex.org/W1824207140","https://openalex.org/W1979514837","https://openalex.org/W1985581502","https://openalex.org/W1988045490","https://openalex.org/W2001399171","https://openalex.org/W2005032394","https://openalex.org/W2008770438","https://openalex.org/W2040566369","https://openalex.org/W2046242379","https://openalex.org/W2048685245","https://openalex.org/W2057826895","https://openalex.org/W2061513598","https://openalex.org/W2099367286","https://openalex.org/W2102729564","https://openalex.org/W2103738827","https://openalex.org/W2111829945","https://openalex.org/W2134483537","https://openalex.org/W2159738186","https://openalex.org/W2179506702","https://openalex.org/W2180508948","https://openalex.org/W2270170253","https://openalex.org/W2341631904","https://openalex.org/W2572335555","https://openalex.org/W2604599596","https://openalex.org/W2763521382","https://openalex.org/W2926816154","https://openalex.org/W2947136671","https://openalex.org/W2950379689","https://openalex.org/W3023186102","https://openalex.org/W3094834091","https://openalex.org/W3105043058","https://openalex.org/W4285719527"],"related_works":["https://openalex.org/W3094834091","https://openalex.org/W2270170253","https://openalex.org/W2533772561","https://openalex.org/W2060703384","https://openalex.org/W2147495866","https://openalex.org/W2964223633","https://openalex.org/W2952752274","https://openalex.org/W2187208864","https://openalex.org/W2395131683","https://openalex.org/W2206197098","https://openalex.org/W2346561852","https://openalex.org/W2397052916","https://openalex.org/W2565911371","https://openalex.org/W2130899738","https://openalex.org/W3013256188","https://openalex.org/W3009532805","https://openalex.org/W2475429212","https://openalex.org/W3105715528","https://openalex.org/W64058425","https://openalex.org/W3013662347"],"abstract_inverted_index":{"Ontology-mediated":[0],"querying":[1,3,41,128],"and":[2,30,76,79,187],"in":[4,40,42,65,102,107,114,129,219,280],"the":[5,28,36,43,49,59,66,69,83,105,108,116,130,164,236,247,252,265,282],"presence":[6,44,131],"of":[7,45,51,61,68,91,132,137,145,217,231,235,239,254],"constraints":[8,146],"are":[9,110],"two":[10,71],"key":[11],"database":[12],"problems":[13],"where":[14],"tuple-generating":[15],"dependencies":[16],"(TGDs)":[17],"play":[18],"a":[19,89,143,153,182,191,197,214,260,271],"central":[20],"role.":[21],"In":[22,54],"ontology-mediated":[23,92],"querying,":[24],"TGDs":[25,78,98,161,212],"can":[26,99,226],"formalize":[27],"ontology":[29],"thus":[31],"derive":[32],"additional":[33],"facts":[34],"from":[35],"given":[37,272],"data,":[38],"while":[39],"constraints,":[46,133],"they":[47],"restrict":[48],"set":[50,144],"admissible":[52],"databases.":[53],"this":[55],"work,":[56],"we":[57,134,194],"study":[58,264],"limits":[60],"efficient":[62],"query":[63,118,284],"evaluation":[64],"context":[67],"above":[70,248],"problems,":[72,268],"focusing":[73],"on":[74,80,96,159,181,210,224],"guarded":[75,97,160],"frontier-guarded":[77,211],"UCQs":[81],"as":[82,229],"actual":[84,117,149,283],"queries.":[85],"We":[86,151,262],"show":[87,152,196],"that":[88,141,162,251],"class":[90,109],"queries":[93],"(OMQs)":[94],"based":[95,158,180,209],"be":[100,227],"evaluated":[101],"FPT":[103,171],"iff":[104],"OMQs":[106,113,167],"equivalent":[111,277],"to":[112,123,203,278],"which":[115,281],"has":[119,285],"bounded":[120,215,258,286],"treewidth,":[121],"up":[122,202],"some":[124,204],"reasonable":[125,205],"assumptions.":[126],"For":[127],"consider":[135],"classes":[136,238],"constraint-query":[138],"specifications":[139],"(CQSs)":[140],"bundle":[142],"with":[147,173,213],"an":[148],"query.":[150],"dichotomy":[154,199],"result":[155],"for":[156,166,207],"CQSs":[157,208,225],"parallels":[163],"one":[165,279],"except":[168],"that,":[169],"additionally,":[170],"coincides":[172],"PTime":[174],"combined":[175],"complexity.":[176],"The":[177],"proof":[178],"is":[179,257,276],"novel":[183],"connection":[184],"between":[185],"OMQ":[186,273],"CQS":[188,275],"evaluation.":[189],"Using":[190],"direct":[192],"proof,":[193],"also":[195,263],"similar":[198],"result,":[200],"again":[201],"assumptions,":[206],"number":[216],"atoms":[218],"TGD":[220],"heads.":[221],"Our":[222],"results":[223,249],"viewed":[228],"extensions":[230],"Grohe's":[232,244],"well-known":[233],"characterization":[234],"tractable":[237],"CQs":[240],"(without":[241],"constraints).":[242],"Like":[243],"characterization,":[245],"all":[246],"assume":[250],"arity":[253],"relation":[255],"symbols":[256],"by":[259],"constant.":[261],"associated":[266],"meta":[267],"i.e.,":[269],"whether":[270],"or":[274],"treewidth.":[287]},"counts_by_year":[],"updated_date":"2026-03-21T08:13:44.787528","created_date":"2022-07-26T00:00:00"}