{"id":116338,"date":"2024-06-04T21:39:58","date_gmt":"2024-06-04T19:39:58","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/pervyj-stabilnyj-reliz-subd-duckdb"},"modified":"2024-06-04T21:39:58","modified_gmt":"2024-06-04T19:39:58","slug":"pervyj-stabilnyj-reliz-subd-duckdb","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/pervyj-stabilnyj-reliz-subd-duckdb","title":{"rendered":"La prima versione stabile del DBMS DuckDB","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Dopo sei anni di sviluppo, \u00e8 stata presentata la versione del DBMS DuckDB 1.0, posizionata come un'alternativa a SQLite per le query analitiche. DuckDB combina propriet\u00e0 di SQLite come compattezza, possibilit\u00e0 di connessione in forma di libreria integrata, archiviazione del database in un unico file e un'interfaccia CLI user-friendly con strumenti e ottimizzazioni per l'esecuzione di query analitiche che coprono una parte significativa dei dati memorizzati, ad esempio eseguendo aggregazioni dell'intero contenuto delle tabelle o unendo pi\u00f9 grandi tabelle. Il codice del progetto \u00e8 scritto in C++ e distribuito sotto la licenza MIT.     <\/p>\n<p>La versione 1.0 \u00e8 evidenziata come il primo rilascio stabile del progetto, durante la preparazione del quale \u00e8 stata data priorit\u00e0 alla stabilit\u00e0 piuttosto che all'ampliamento delle funzionalit\u00e0. In questa nuova versione \u00e8 stata anche confermata la fissazione del formato di archiviazione dei dati, per il quale a partire dal rilascio precedente \u00e8 garantita la retrocompatibilit\u00e0. Nei futuri rilasci, gli sviluppatori intendono affrontare con maggior cautela l'aggiunta di nuove funzionalit\u00e0 e prendersi cura della compatibilit\u00e0 tra le versioni, oltre a stabilizzare il dialetto SQL e l'API C. Se in futuro si render\u00e0 necessario modificare la semantica SQL, gli sviluppatori pubblicheranno in anticipo un avviso riguardo ai cambiamenti imminenti e forniranno soluzioni alternative per mantenere la funzionalit\u00e0 del codice esistente.      <\/p>\n<p>DuckDB supporta un dialetto esteso del linguaggio SQL, che include funzionalit\u00e0 aggiuntive per gestire query molto complesse e di lunga durata. Ad esempio, \u00e8 possibile utilizzare tipi complessi (array, strutture, unioni), cos\u00ec come eseguire sottoquery correlate arbitrari e nidificati. \u00c8 support l'esecuzione simultanea di pi\u00f9 query e l'esecuzione di query direttamente da file in formato CSV e Parquet. \u00c8 disponibile il supporto per l'importazione da DBMS PostgreSQL.    <\/p>\n<p>Oltre al codice shell di SQLite, il progetto utilizza un parser estratto in una libreria separata da PostgreSQL, il componente Date Math da MonetDB, la propria implementazione delle funzioni di finestra (basata sull'algoritmo Segment Tree Aggregation), un gestore di espressioni regolari basato sulla libreria RE2, il proprio ottimizzatore di query, il meccanismo MVCC per la gestione della concorrenza (Multi-Version Concurrency Control), e anche un motore di esecuzione delle query vettorizzato basato sull'algoritmo Hyper-Pipelining Query Execution, che consente di elaborare grandi insiemi di valori in un'unica operazione.<br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=61309\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 \u0448\u0435\u0441\u0442\u0438 \u043b\u0435\u0442 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u0432\u044b\u043f\u0443\u0441\u043a \u0421\u0423\u0411\u0414 DuckDB 1.0, \u043f\u043e\u0437\u0438\u0446\u0438\u043e\u043d\u0438\u0440\u0443\u0435\u043c\u043e\u0439 \u043a\u0430\u043a \u0432\u0430\u0440\u0438\u0430\u043d\u0442 SQLite \u0434\u043b\u044f \u0430\u043d\u0430\u043b\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0445 \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432. DuckDB \u0441\u043e\u0447\u0435\u0442\u0430\u0435\u0442 \u0442\u0430\u043a\u0438\u0435 \u0441\u0432\u043e\u0439\u0441\u0442\u0432\u0430 SQLite, \u043a\u0430\u043a \u043a\u043e\u043c\u043f\u0430\u043a\u0442\u043d\u043e\u0441\u0442\u044c, \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u0432 \u0444\u043e\u0440\u043c\u0435 \u0432\u0441\u0442\u0440\u0430\u0438\u0432\u0430\u0435\u043c\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438, \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u0435 \u0411\u0414 \u0432 \u043e\u0434\u043d\u043e\u043c \u0444\u0430\u0439\u043b\u0435 \u0438 \u0443\u0434\u043e\u0431\u043d\u044b\u0439 CLI-\u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441, \u0441\u043e \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0430\u043c\u0438 \u0438 \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0430\u0446\u0438\u044f\u043c\u0438 \u0434\u043b\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u0430\u043d\u0430\u043b\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0445 \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432, \u043e\u0445\u0432\u0430\u0442\u044b\u0432\u0430\u044e\u0449\u0438\u0445 \u0437\u043d\u0430\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u0443\u044e \u0447\u0430\u0441\u0442\u044c \u0445\u0440\u0430\u043d\u0438\u043c\u044b\u0445 \u0434\u0430\u043d\u043d\u044b\u0445, \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u044e\u0449\u0438\u0445 \u0430\u0433\u0440\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0432\u0441\u0435\u0433\u043e \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0433\u043e [&hellip;]<\/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-116338","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041f\u043e\u0441\u043b\u0435 \u0448\u0435\u0441\u0442\u0438 \u043b\u0435\u0442 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u0432\u044b\u043f\u0443\u0441\u043a \u0421\u0423\u0411\u0414 DuckDB 1.0, \u043f\u043e\u0437\u0438\u0446\u0438\u043e\u043d\u0438\u0440\u0443\u0435\u043c\u043e\u0439 \u043a\u0430\u043a \u0432\u0430\u0440\u0438\u0430\u043d\u0442 SQLite \u0434\u043b\u044f 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