{"id":99711,"date":"2021-04-13T16:22:39","date_gmt":"2021-04-13T14:22:39","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/google-opublikoval-yazyk-logicheskogo-programmirovaniya-logica"},"modified":"2021-04-13T16:22:39","modified_gmt":"2021-04-13T14:22:39","slug":"google-opublikoval-yazyk-logicheskogo-programmirovaniya-logica","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/google-opublikoval-yazyk-logicheskogo-programmirovaniya-logica","title":{"rendered":"Google har offentliggjort det logiske programmeringssprog Logica","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Google har introduceret et nyt deklarativt sprog til logisk programmering kaldet Logica, designet til datamanipulation og som overs\u00e6tter programmer til SQL-sprog. Det nye sprog er rettet mod dem, der \u00f8nsker at bruge syntaksen fra logisk programmering til at skrive databaseforesp\u00f8rgsler. I \u00f8jeblikket kan den resulterende SQL-kode k\u00f8res i Google BigQuery eller i databaserne PostgreSQL og SQLite, hvor underst\u00f8ttelsen stadig er eksperimentel. I fremtiden planl\u00e6gges det at udvide antallet af underst\u00f8ttede SQL-dialekter. Projektkoden er skrevet i Python og offentliggjort under Apache 2.0-licensen. <\/p>\n

Logica forts\u00e6tter med at udvikle et andet databehandlingssprog, Yedalog, der er designet af Google, og giver et abstraktionsniveau, der ikke er tilg\u00e6ngeligt i standard SQL. Foresp\u00f8rgsler i Logica programmeres i form af en r\u00e6kke logiske udsagn. Moduler, importoperationer og mulighed for at bruge Logica fra den interaktive Jupyter Notebook underst\u00f8ttes. For eksempel, for at danne et overblik over de personer, der oftest blev n\u00e6vnt i nyhederne i 2020, kan f\u00f8lgende program i Logica anvendes til at kontakte GDELT-databasen: @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

Skrivning af komplekse SQL-foresp\u00f8rgsler f\u00f8rer til behovet for at skrive omfangsrige, flersidede k\u00e6der, der ikke er \u00e5benlyse i forst\u00e5elsen, hvilket hindrer genbrug af dele af foresp\u00f8rgslen og vanskeligg\u00f8r vedligeholdelse. For typiske gentagne beregninger i SQL kan man anvende udsigter og funktioner, men de underst\u00f8tter ikke importoperationer og giver ikke den fleksibilitet, som er karakteristisk for h\u00f8jniveau-sprog (fx er det umuligt at sende en funktion til en anden funktion). Logica g\u00f8r det muligt at sammens\u00e6tte programmer ud fra sm\u00e5, forst\u00e5elige og genanvendelige logiske enheder, som kan testes, knyttes til bestemte navne og grupperes i pakker, der er tilg\u00e6ngelige for brug i andre projekter.
\n
Kilde: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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\u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043f\u043e\u043a\u0430 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-99711","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Google har offentliggjort det logiske programmeringssprog Logica | ProHoster","description":"Google har pr\u00e6senteret et nyt deklarativt logisk programmeringssprog, Logica, der er beregnet til at manipulere data og overs\u00e6tte programmer til 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