{"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\/it\/blog\/news\/google-opublikoval-yazyk-logicheskogo-programmirovaniya-logica","title":{"rendered":"Google ha pubblicato il linguaggio di programmazione logica Logica","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Google ha presentato un nuovo linguaggio di programmazione logica dichiarativa chiamato Logica, progettato per la manipolazione dei dati e la traduzione di programmi nel linguaggio SQL. Questo nuovo linguaggio \u00e8 rivolto a chi desidera utilizzare la sintassi della programmazione logica per scrivere query su basi di dati. Attualmente, il codice SQL risultante pu\u00f2 essere eseguito nel database Google BigQuery o nei sistemi di gestione database PostgreSQL e SQLite, il cui supporto \u00e8 ancora sperimentale. In futuro, si prevede di ampliare il numero di dialetti SQL supportati. Il codice del progetto \u00e8 scritto in Python ed \u00e8 pubblicato sotto la licenza Apache 2.0. <\/p>\n

Logica continua lo sviluppo di un altro linguaggio di elaborazione dati creato in Google, Yedalog, e fornisce un livello di astrazione non disponibile nel normale SQL. Le query in Logica sono programmate come un insieme di affermazioni logiche. Sono supportati moduli, operazioni di importazione e la possibilit\u00e0 di utilizzare Logica all'interno della shell interattiva Jupyter Notebook. Ad esempio, per generare un riepilogo delle persone pi\u00f9 frequentemente menzionate nelle notizie del 2020, si pu\u00f2 utilizzare il seguente programma in Logica per interrogare il database GDELT: @OrderBy(Mentions, \u00abmentions desc\u00bb); @Limit(Mentions, 10); Mentions(person:, mentions? += 1) distinct :- gdelt-bq.gdeltv2.gkg(persons:, date:), Substr(ToString(date), 0, 4) == \u00ab2020\u00bb, the_persons == Split(persons, \u00ab;\u00bb), 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

Scrivere complesse query in SQL porta alla necessit\u00e0 di scrivere catene ingombranti e multilinea, poco intuitive, che ostacolano il riutilizzo di parti della query e complicano la manutenzione. Per calcoli ripetitivi e standard in SQL, \u00e8 possibile utilizzare viste e funzioni, ma non supportano operazioni di importazione e non forniscono la flessibilit\u00e0 tipica dei linguaggi di alto livello (ad esempio, non \u00e8 possibile passare una funzione a un'altra funzione). Logica consente di comporre programmi a partire da piccoli blocchi logici, comprensibili e riutilizzabili, che possono essere testati, associati a nomi specifici e raggruppati in pacchetti disponibili per l'uso in altri progetti.
\n
Fonte: 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\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 ha pubblicato il linguaggio di programmazione logica Logica | ProHoster","description":"Google ha presentato un nuovo linguaggio dichiarativo di programmazione logica, Logica, progettato per la manipolazione dei dati e per tradurre programmi in linguaggio 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