Spolo\u010dnos\u0165 Google predstavila nov\u00fd deklarat\u00edvny jazyk logick\u00e9ho programovania Logica, ur\u010den\u00fd na manipul\u00e1ciu s d\u00e1tami a prev\u00e1dzaj\u00faci programy do jazyka SQL. Nov\u00fd jazyk je zameran\u00fd na t\u00fdch, ktor\u00ed chc\u00fa pou\u017ei\u0165 syntax logick\u00e9ho programovania pri p\u00edsan\u00ed dopytov na DB. V s\u00fa\u010dasnosti m\u00f4\u017ee v\u00fdsledn\u00fd SQL k\u00f3d be\u017ea\u0165 v \u00falo\u017eisku Google BigQuery alebo v SDB PostgreSQL a SQLite, ktor\u00fdch podpora je zatia\u013e experiment\u00e1lna. V bud\u00facnosti sa pl\u00e1nuje roz\u0161\u00edri\u0165 po\u010det podporovan\u00fdch SQL dialektov. K\u00f3d projektu je nap\u00edsan\u00fd v jazyku Python a je zverejnen\u00fd pod licenciou Apache 2.0. <\/p>\n
Logica pokra\u010duje vo v\u00fdvoji \u010fal\u0161ieho jazyka na spracovanie d\u00e1t, ktor\u00fd bol vyvinut\u00fd v Google, Yedalog, a poskytuje \u00farove\u0148 abstrakcie, ktor\u00e1 nie je dostupn\u00e1 v \u0161tandardnom SQL. Dotazy v Logica s\u00fa programovan\u00e9 vo forme s\u00faboru logick\u00fdch vyhl\u00e1sen\u00ed. Podporovan\u00e9 s\u00fa moduly, oper\u00e1cie importu a mo\u017enos\u0165 pou\u017e\u00edva\u0165 Logica z interakt\u00edvneho prostredia Jupyter Notebook. Napr\u00edklad, na vytvorenie preh\u013eadu os\u00f4b, ktor\u00e9 boli naj\u010dastej\u0161ie spom\u00ednan\u00e9 v spr\u00e1vach za rok 2020, je mo\u017en\u00e9 pou\u017ei\u0165 nasleduj\u00faci program v jazyku Logica na dotazovanie sa do datab\u00e1zy 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 +--------+--------+ +--------+--------+ | person | mentions_count | +--------+--------+ | 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
P\u00edsanie zlo\u017eit\u00fdch dotazov v SQL vedie k potrebe p\u00edsania nepreh\u013eadn\u00fdch, mnohostrann\u00fdch re\u0165azcov, ktor\u00e9 s\u0165a\u017euj\u00fa znovupou\u017eite\u013enos\u0165 \u010dast\u00ed dotazu a komplikuj\u00fa \u00fadr\u017ebu. Na typick\u00e9 opakuj\u00face sa v\u00fdpo\u010dty v SQL je mo\u017en\u00e9 pou\u017ei\u0165 poh\u013eady a funkcie, no nepodporuj\u00fa oper\u00e1cie importu a neposkytuj\u00fa flexibilitu, ak\u00fa maj\u00fa vysoko\u00farov\u0148ov\u00e9 jazyky (napr\u00edklad nie je mo\u017en\u00e9 prenies\u0165 funkciu do funkcie). Logica umo\u017e\u0148uje zostavova\u0165 programy z mal\u00fdch, zrozumite\u013en\u00fdch a znovu pou\u017eite\u013en\u00fdch logick\u00fdch blokov, ktor\u00e9 m\u00f4\u017eu by\u0165 testovan\u00e9, spojen\u00e9 s ur\u010dit\u00fdmi n\u00e1zvami a zoskupen\u00e9 do bal\u00edkov, ktor\u00e9 s\u00fa dostupn\u00e9 pre pou\u017eitie v in\u00fdch projektoch. \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":"