KingsleyIdehen added a comment.
That's a consequence of the "Anytime Query" feature in Virtuoso that provides partial solutions in situations where a query cannot be completed within a specific timeframe. This timeframe takes the form of a configurable timeout, and is an critical feature for enabling global ad-hoc query access, 24/7, 365 days a year re the likes of DBpedia and Wikidata. When a partial query is returned, information is delivered via the HTTP response as per: curl -I "https://wikidata.demo.openlinksw.com/sparql?default-graph-uri=http%3A%2F%2Fwww.wikidata.org%2F&query=PREFIX+parl%3A+%3Chttps%3A%2F%2Fid.parliament.uk%2Fschema%2F%3E%0D%0APREFIX+rdfs%3A+%3Chttp%3A%2F%2Fwww.w3.org%2F2000%2F01%2Frdf-schema%23%3E%0D%0APREFIX+wd%3A+%3Chttp%3A%2F%2Fwww.wikidata.org%2Fentity%2F%3E%0D%0APREFIX+wdt%3A+%3Chttp%3A%2F%2Fwww.wikidata.org%2Fprop%2Fdirect%2F%3E%0D%0APREFIX+wikibase%3A+%3Chttp%3A%2F%2Fwikiba.se%2Fontology%23%3E%0D%0APREFIX+bd%3A+%3Chttp%3A%2F%2Fwww.bigdata.com%2Frdf%23%3E%0D%0APREFIX+dct%3A+%3Chttp%3A%2F%2Fpurl.org%2Fdc%2Fterms%2F%3E%0D%0APREFIX+dbpedia%3A+%3Chttp%3A%2F%2Fdbpedia.org%2F%3E+%0D%0APREFIX+foaf%3A+%3Chttp%3A%2F%2Fxmlns.com%2Ffoaf%2F0.1%2F%3E%0D%0APREFIX+wds%3A+%3Chttp%3A%2F%2Fwww.wikidata.org%2Fentity%2Fstatement%2F%3E%0D%0APREFIX+wdv%3A+%3Chttp%3A%2F%2Fwww.wikidata.org%2Fvalue%2F%3E%0D%0APREFIX+wdt%3A+%3Chttp%3A%2F%2Fwww.wikidata.org%2Fprop%2Fdirect%2F%3E%0D%0APREFIX+p%3A+%3Chttp%3A%2F%2Fwww.wikidata.org%2Fprop%2F%3E%0D%0APREFIX+ps%3A+%3Chttp%3A%2F%2Fwww.wikidata.org%2Fprop%2Fstatement%2F%3E%0D%0APREFIX+pq%3A+%3Chttp%3A%2F%2Fwww.wikidata.org%2Fprop%2Fqualifier%2F%3E%0D%0A%0D%0ASELECT+%3Fperson_id+%3Fperson+%28COUNT%28%3Fprofession_id%29+AS+%3Fcount%29+%28GROUP_CONCAT%28%3Fprofession%3B+separator%3D%22%2C+%22%29+AS+%3Fprofessions%29+WHERE+%7B%0D%0A++%3Fperson_id+wdt%3AP31+wd%3AQ5+.%0D%0A++%3Fperson_id+wdt%3AP106+%3Fprofession_id+.%0D%0A++%3Fprofession_id+rdfs%3Alabel+%3Fprofession+.%0D%0A++%3Fperson_id+rdfs%3Alabel+%3Fperson+.%0D%0A++FILTER+%28LANG%28%3Fperson%29+%3D+%22en%22%29+.%0D%0A++FILTER+%28LANG%28%3Fprofession%29+%3D+%22en%22%29%0D%0A%7D%0D%0AGROUP+BY+%3Fperson_id+%3Fperson%0D%0AORDER+BY+DESC%28%3Fcount%29&format=text%2Fx-html%2Btr&timeout=30000000&signal_void=on&signal_unconnected=on"; Which returns: HTTP/1.1 200 OK Date: Thu, 09 Sep 2021 17:53:51 GMT Content-Type: text/html; charset=UTF-8 Content-Length: 479290 Connection: keep-alive Vary: Accept-Encoding Server: Virtuoso/08.03.3320 (Linux) x86_64-generic-linux-glibc25 VDB Accept-Ranges: bytes X-SPARQL-default-graph: http://www.wikidata.org/ X-SQL-State: S1TAT X-SQL-Message: RC...: Returning incomplete results, query interrupted by result timeout. Activity: 1.075M rnd 530.1K seq 16.78K same seg 109.7K same pg 14.13K same par 0 disk 0 spec disk 0B / 0 X-Exec-Milliseconds: 2031 X-Exec-DB-Activity: 1.075M rnd 530.1K seq 16.78K same seg 109.7K same pg 14.13K same par 0 disk 0 spec disk 0B / 0 messages 0 fork Content-disposition: filename=sparql_2021-09-09_17-53-51Z.html Expires: Thu, 09 Sep 2021 18:53:51 GMT Cache-Control: max-age=3600 Strict-Transport-Security: max-age=15768000 **Related** [1] DBpedia Fair Use Note <https://www.dbpedia.org/resources/sparql/> [2] Virtuoso Anytime Query Tips & Tricks Note <http://vos.openlinksw.com/owiki/wiki/VOS/VirtTipsAndTricksAnytimeSPARQLQuery> TASK DETAIL https://phabricator.wikimedia.org/T206560 EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/ To: KingsleyIdehen Cc: Hannah_Bast, RShigapov, Izno, KingsleyIdehen, Daniel_Mietchen, Majavah, karapayneWMDE, MarioGom, Mohammed_Sadat_WMDE, Hjfocs, danshick-wmde, Thadguidry, Tpt, TallTed, Sj, Afandian, Justin0x2004, Jerven, TheKtk, Ivanhercaz, Jneubert, DanBri, Lydia_Pintscher, Tagishsimon, Samantha_Alipio_WMDE, Ostrzyciel, GreenReaper, WMDE-leszek, Salgo60, So9q, Krabina, Jecummings4, TomT0m, Akuckartz, Susannaanas, Addshore, Andrawaag, Gehel, Lucas_Werkmeister_WMDE, Aklapper, Smalyshev, Invadibot, MPhamWMF, Jtm-lis, maantietaja, NavinRizwi, CBogen, Isaacandy, Demian, Olson.jared.m, Nandana, Namenlos314, Lahi, Gq86, Bryandamon, GoranSMilovanovic, QZanden, EBjune, merbst, LawExplorer, _jensen, rosalieper, Scott_WUaS, Jonas, Xmlizer, Steko, Samwilson, PhotographerTom, suriyaa, Psychoslave, tosfos, jkroll, Wikidata-bugs, Jdouglas, aude, Tobias1984, Darenwelsh, Dinoguy1000, Manybubbles, brion, Mbch331, MarkAHershberger
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