Spole\u010dnost Google p\u0159edstavila nov\u00fd deklarativn\u00ed jazyk logick\u00e9ho programov\u00e1n\u00ed Logica, ur\u010den\u00fd pro manipulaci s daty a p\u0159ev\u00e1d\u011bj\u00edc\u00ed programy do jazyka SQL. Nov\u00fd jazyk je zam\u011b\u0159en na ty, kte\u0159\u00ed cht\u011bj\u00ed pou\u017e\u00edvat syntaxi logick\u00e9ho programov\u00e1n\u00ed p\u0159i psan\u00ed dotaz\u016f na datab\u00e1ze. V sou\u010dasnosti m\u016f\u017ee b\u00fdt v\u00fdsledn\u00fd SQL k\u00f3d vykon\u00e1v\u00e1n ve skladu Google BigQuery nebo v datab\u00e1zov\u00fdch syst\u00e9mech PostgreSQL a SQLite, jejich\u017e podpora je zat\u00edm experiment\u00e1ln\u00ed. V budoucnu se pl\u00e1nuje roz\u0161\u00ed\u0159en\u00ed po\u010dtu podporovan\u00fdch SQL dialekt\u016f. K\u00f3d projektu je naps\u00e1n v Pythonu a publikov\u00e1n pod licenc\u00ed Apache 2.0. <\/p>\n
Logica pokra\u010duje ve v\u00fdvoji dal\u0161\u00edho jazyka zpracov\u00e1n\u00ed dat, Yedalog, vyvinut\u00e9ho ve spole\u010dnosti Google, a poskytuje \u00farove\u0148 abstrakce, kter\u00e1 nen\u00ed dostupn\u00e1 v b\u011b\u017en\u00e9m SQL. Dotazy v Logica jsou programov\u00e1ny formou souboru logick\u00fdch tvrzen\u00ed. Podporuje moduly, operace importu a mo\u017enost pou\u017eit\u00ed Logica z interaktivn\u00edho prost\u0159ed\u00ed Jupyter Notebook. Nap\u0159\u00edklad pro vytvo\u0159en\u00ed p\u0159ehledu osob, kter\u00e9 byly nej\u010dast\u011bji zmi\u0148ov\u00e1ny v m\u00e9di\u00edch v roce 2020, lze pou\u017e\u00edt n\u00e1sleduj\u00edc\u00ed program v jazyce Logica pro dotaz na datab\u00e1zi GDELT: @OrderBy(Mentions, \"mentions desc\"); @Limit(Mentions, 10); Mentions(person:, mentions? += 1) distinct :- gdelt-bq.gdeltv2.gkg(persons:, date:), Substr(ToString(date), 0, 4) == \"2020\", the_persons == Split(persons, \";\"), person in the_persons; $ logica mentions.l run Mentions +--------+--------+ | osoba | po\u010det_zm\u00edn | +--------+--------+ | donald trump | 3077130 | | los angeles | 1078412 | | joe biden | 1054827 | | george floyd | 872919 | | boris johnson | 674786 | | barack obama | 438181 | | vladimir putin | 410587 | | bernie sanders | 387383 | | andrew cuomo | 345462 | | las vegas | 325487 | +--------+--------+ <\/p>\n
Ps\u00e1n\u00ed slo\u017eit\u00fdch dotaz\u016f v SQL vede k pot\u0159eb\u011b ps\u00e1t objemn\u00e9 v\u00edcetransov\u00e9 \u0159et\u011bzce, kter\u00e9 nejsou z\u0159ejm\u011b \u010diteln\u00e9, br\u00e1n\u00ed op\u011btovn\u00e9mu pou\u017eit\u00ed \u010d\u00e1st\u00ed dotazu a zt\u011b\u017euj\u00ed \u00fadr\u017ebu. Pro typick\u00e9 opakuj\u00edc\u00ed se v\u00fdpo\u010dty v SQL lze pou\u017e\u00edt pohledy a funkce, ale ty nepodporuj\u00ed importn\u00ed operace a neposkytuj\u00ed flexibilitu vlastn\u00ed vysokohladinov\u00fdm jazyk\u016fm (nap\u0159\u00edklad nen\u00ed mo\u017en\u00e9 p\u0159edat funkci do funkce). Logica umo\u017e\u0148uje skl\u00e1dat programy z mal\u00fdch, srozumiteln\u00fdch a pro op\u011btovn\u00e9 pou\u017eit\u00ed dostupn\u00fdch logick\u00fdch blok\u016f, kter\u00e9 mohou b\u00fdt testov\u00e1ny, spojeny s ur\u010dit\u00fdmi n\u00e1zvy a seskupeny do bal\u00ed\u010dk\u016f, kter\u00e9 jsou dostupn\u00e9 pro pou\u017eit\u00ed v r\u00e1mci jin\u00fdch projekt\u016f. \u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Google \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u043b\u0430 \u043d\u043e\u0432\u044b\u0439 \u0434\u0435\u043a\u043b\u0430\u0440\u0430\u0442\u0438\u0432\u043d\u044b\u0439 \u044f\u0437\u044b\u043a \u043b\u043e\u0433\u0438\u0447\u0435\u0441\u043a\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f Logica, \u043f\u0440\u0435\u0434\u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u043d\u044b\u0439 \u0434\u043b\u044f \u043c\u0430\u043d\u0438\u043f\u0443\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0434\u0430\u043d\u043d\u044b\u043c\u0438 \u0438 \u0442\u0440\u0430\u043d\u0441\u043b\u0438\u0440\u0443\u044e\u0449\u0438\u0439 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u044b \u0432 \u044f\u0437\u044b\u043a SQL. \u041d\u043e\u0432\u044b\u0439 \u044f\u0437\u044b\u043a \u043e\u0440\u0438\u0435\u043d\u0442\u0438\u0440\u043e\u0432\u0430\u043d \u043d\u0430 \u0442\u0435\u0445, \u043a\u0442\u043e \u0445\u043e\u0447\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0441\u0438\u043d\u0442\u0430\u043a\u0441\u0438\u0441 \u043b\u043e\u0433\u0438\u0447\u0435\u0441\u043a\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043f\u0440\u0438 \u043d\u0430\u043f\u0438\u0441\u0430\u043d\u0438\u0438 \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432 \u043a \u0411\u0414. \u0412 \u043d\u0430\u0441\u0442\u043e\u044f\u0449\u0435\u0435 \u0432\u0440\u0435\u043c\u044f \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0439 SQL-\u043a\u043e\u0434 \u043c\u043e\u0436\u0435\u0442 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0442\u044c\u0441\u044f \u0432 \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435 Google BigQuery \u0438\u043b\u0438 \u0432 \u0421\u0423\u0411\u0414 PostgreSQL \u0438 SQLite, \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043f\u043e\u043a\u0430 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Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"