{"id":"https://openalex.org/W2963245669","doi":"https://doi.org/10.4230/lipics.icdt.2018.16","title":"Covers of Query Results","display_name":"Covers of Query Results","publication_year":2018,"publication_date":"2018-01-01","ids":{"openalex":"https://openalex.org/W2963245669","doi":"https://doi.org/10.4230/lipics.icdt.2018.16","mag":"2963245669"},"language":"en","primary_location":{"is_oa":false,"landing_page_url":"https://arxiv.org/abs/1709.01600","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_indexed_in_scopus":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":["Cornell University"],"type":"repository"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false},"type":"article","type_crossref":"proceedings-article","indexed_in":[],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5083237962","display_name":"Ahmet Kara","orcid":"https://orcid.org/0000-0002-1590-0023"},"institutions":[{"id":"https://openalex.org/I40120149","display_name":"University of Oxford","ror":"https://ror.org/052gg0110","country_code":"GB","type":"funder","lineage":["https://openalex.org/I40120149"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Ahmet Kara","raw_affiliation_strings":["University of Oxford, Oxford, United Kingdom"],"affiliations":[{"raw_affiliation_string":"University of Oxford, Oxford, United Kingdom","institution_ids":["https://openalex.org/I40120149"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5035180920","display_name":"Dan Olteanu","orcid":"https://orcid.org/0000-0002-4682-7068"},"institutions":[{"id":"https://openalex.org/I40120149","display_name":"University of Oxford","ror":"https://ror.org/052gg0110","country_code":"GB","type":"funder","lineage":["https://openalex.org/I40120149"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Dan Olteanu","raw_affiliation_strings":["University of Oxford, Oxford, United Kingdom"],"affiliations":[{"raw_affiliation_string":"University of Oxford, Oxford, United Kingdom","institution_ids":["https://openalex.org/I40120149"]}]}],"institution_assertions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.879,"has_fulltext":false,"cited_by_count":5,"citation_normalized_percentile":{"value":0.577805,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":79,"max":80},"biblio":{"volume":"98","issue":null,"first_page":"22","last_page":null},"is_retracted":false,"is_paratext":false,"primary_topic":{"id":"https://openalex.org/T10720","display_name":"Complexity and Algorithms in Graphs","score":0.9948,"subfield":{"id":"https://openalex.org/subfields/1703","display_name":"Computational Theory and Mathematics"},"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/T10720","display_name":"Complexity and Algorithms in Graphs","score":0.9948,"subfield":{"id":"https://openalex.org/subfields/1703","display_name":"Computational Theory and Mathematics"},"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":0.9939,"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/T11303","display_name":"Bayesian Modeling and Causal Inference","score":0.9931,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/join","display_name":"Join (topology)","score":0.5327461},{"id":"https://openalex.org/keywords/online-aggregation","display_name":"Online aggregation","score":0.49007022},{"id":"https://openalex.org/keywords/spatial-query","display_name":"Spatial Query","score":0.45557538}],"concepts":[{"id":"https://openalex.org/C2778692605","wikidata":"https://www.wikidata.org/wiki/Q4041866","display_name":"Joins","level":2,"score":0.6462208},{"id":"https://openalex.org/C157692150","wikidata":"https://www.wikidata.org/wiki/Q2919848","display_name":"Query optimization","level":2,"score":0.64005446},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6126338},{"id":"https://openalex.org/C118930307","wikidata":"https://www.wikidata.org/wiki/Q600590","display_name":"Tuple","level":2,"score":0.5420708},{"id":"https://openalex.org/C2776124973","wikidata":"https://www.wikidata.org/wiki/Q3183033","display_name":"Join (topology)","level":2,"score":0.5327461},{"id":"https://openalex.org/C24028149","wikidata":"https://www.wikidata.org/wiki/Q7094056","display_name":"Online aggregation","level":5,"score":0.49007022},{"id":"https://openalex.org/C172722865","wikidata":"https://www.wikidata.org/wiki/Q2302053","display_name":"Spatial query","level":5,"score":0.45557538},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.43210363},{"id":"https://openalex.org/C192939062","wikidata":"https://www.wikidata.org/wiki/Q104840822","display_name":"Sargable","level":4,"score":0.4090419},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.30310336},{"id":"https://openalex.org/C77088390","wikidata":"https://www.wikidata.org/wiki/Q8513","display_name":"Database","level":1,"score":0.25285745},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.21263522},{"id":"https://openalex.org/C164120249","wikidata":"https://www.wikidata.org/wiki/Q995982","display_name":"Web search query","level":3,"score":0.18216765},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.17821068},{"id":"https://openalex.org/C23123220","wikidata":"https://www.wikidata.org/wiki/Q816826","display_name":"Information retrieval","level":1,"score":0.13088143},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.0},{"id":"https://openalex.org/C97854310","wikidata":"https://www.wikidata.org/wiki/Q19541","display_name":"Search engine","level":2,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"is_oa":false,"landing_page_url":"https://arxiv.org/abs/1709.01600","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_indexed_in_scopus":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":["Cornell University"],"type":"repository"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false}],"best_oa_location":null,"sustainable_development_goals":[],"grants":[],"datasets":[],"versions":[],"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W3105622409","https://openalex.org/W3102325859","https://openalex.org/W2981409090","https://openalex.org/W2751359678","https://openalex.org/W2468149677","https://openalex.org/W2428510227","https://openalex.org/W2398728746","https://openalex.org/W2296698911","https://openalex.org/W2237870278","https://openalex.org/W2183317059","https://openalex.org/W2161911872","https://openalex.org/W2159086712","https://openalex.org/W2146492010","https://openalex.org/W2133264015","https://openalex.org/W2073619211","https://openalex.org/W2008063440","https://openalex.org/W2006811187","https://openalex.org/W1984868905","https://openalex.org/W1960822155","https://openalex.org/W1532951636"],"abstract_inverted_index":{"We":[0],"introduce":[1],"succinct":[2],"lossless":[3],"representations":[4],"of":[5,13,26,40,46,58,116,139],"query":[6,15,60,97,109],"results":[7,16],"called":[8,103],"covers.":[9],"They":[10],"are":[11,34],"subsets":[12],"the":[14,24,56,59,84,108],"that":[17,63,67,135],"correspond":[18],"to":[19,79,131],"minimal":[20],"edge":[21],"covers":[22,31,57,69,94,118,128],"in":[23,74,83,107,153],"hypergraphs":[25],"these":[27],"results.\r\n\r\nWe":[28],"first":[29],"study":[30],"whose":[32],"structures":[33],"given":[35],"by":[36],"fractional":[37],"hypertree":[38],"decompositions":[39],"join":[41,89],"queries.":[42],"\r\nFor":[43],"any":[44,115],"decomposition":[45,64],"a":[47,80,100,137],"query,":[48],"we":[49,91],"give":[50],"asymptotically":[51],"tight":[52],"size":[53],"bounds":[54],"for":[55],"result":[61,110],"over":[62],"and":[65,123,151],"show":[66],"such":[68,142],"can":[70,92,111],"be":[71,112],"computed":[72],"worst-case":[75],"optimal":[76],"time":[77,122],"up":[78],"logarithmic":[81],"factor":[82],"database":[85],"size.":[86],"For":[87],"acyclic":[88],"queries,":[90,145],"compute":[93],"compositionally":[95],"using":[96],"plans":[98],"with":[99,119],"new":[101],"operator":[102],"cover-join.":[104],"The":[105],"tuples":[106],"enumerated":[113],"from":[114,129],"its":[117],"linearithmic":[120],"pre-computation":[121],"constant":[124],"delay.\r\n\r\nWe":[125],"then":[126],"generalize":[127],"joins":[130],"functional":[132],"aggregate":[133],"queries":[134],"express":[136],"host":[138],"computational":[140],"problems":[141],"as":[143],"aggregate-join":[144],"in-database":[146],"optimization,":[147],"matrix":[148],"chain":[149],"multiplication,":[150],"inference":[152],"probabilistic":[154],"graphical":[155],"models.":[156]},"abstract_inverted_index_v3":null,"cited_by_api_url":"https://api.openalex.org/works?filter=cites:W2963245669","counts_by_year":[{"year":2022,"cited_by_count":1},{"year":2020,"cited_by_count":2},{"year":2019,"cited_by_count":2}],"updated_date":"2025-04-16T03:09:47.869292","created_date":"2019-07-30"}