{"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\/nl\/blog\/news\/pervyj-stabilnyj-reliz-subd-duckdb","title":{"rendered":"De eerste stabiele release van de database DuckDB.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Na zes jaar ontwikkeling is de release van DuckDB 1.0 gepresenteerd, gepositioneerd als een alternatief voor SQLite voor analytische queries. DuckDB combineert eigenschappen van SQLite, zoals compactheid, de mogelijkheid om als een ingebouwde bibliotheek te worden aangesloten, het opslaan van de database in \u00e9\u00e9n bestand en een gebruiksvriendelijke CLI-interface, met middelen en optimalisaties voor het uitvoeren van analytische queries die een significant deel van de opgeslagen gegevens bestrijken, bijvoorbeeld het uitvoeren van aggregaties van de volledige inhoud van tabellen of het samenvoegen van meerdere grote tabellen. De code van het project is geschreven in C++ en wordt verspreid onder de MIT-licentie.     <\/p>\n<p>Versie 1.0 wordt gemarkeerd als de eerste stabiele release van het project, waarbij de nadruk tijdens de voorbereiding lag op het verhogen van de stabiliteit in plaats van het uitbreiden van de functionaliteit. In de nieuwe versie is ook de opslagformatiefixatie vastgelegd, waarvoor sinds de vorige release backward compatibility wordt gewaarborgd. In latere releases zijn de ontwikkelaars van plan om voorzichtiger om te gaan met het toevoegen van nieuwe mogelijkheden en zorg te dragen voor de compatibiliteit tussen releases, evenals de stabilisatie van de SQL-dialect en C API. Als in de toekomst wijzigingen in de SQL-semantiek nodig zijn, zullen de ontwikkelaars van tevoren een waarschuwing over de aankomende wijzigingen publiceren en omwegen bieden om de werking van bestaande code te waarborgen.      <\/p>\n<p>DuckDB ondersteunt een uitgebreide SQL-dialect, inclusief extra mogelijkheden voor het verwerken van zeer complexe en langdurige queries. Bijvoorbeeld, het gebruik van complexe types (arrays, structs, unions) is mogelijk, evenals het uitvoeren van willekeurige en geneste correlatie-subqueries. Gelijktijdige uitvoering van meerdere queries wordt ondersteund, evenals het uitvoeren van queries rechtstreeks vanuit bestanden in CSV- en Parquet-formaten. Ondersteuning voor import uit PostgreSQL is beschikbaar.    <\/p>\n<p>Naast de shell-code van SQLite gebruikt het project een apart gemaakte parser van PostgreSQL, de Date Math-component van MonetDB, zijn eigen implementatie van vensterfuncties (op basis van het Segment Tree Aggregation-algoritme), een regex-verwerker gebaseerd op de RE2-bibliotheek, eigen query-optimalisatoren, een MVCC-mechanisme voor het beheren van gelijktijdige taakuitvoering (Multi-Version Concurrency Control), en een gevectoriseerde query-executiemotor op basis van het Hyper-Pipelining Query Execution-algoritme, waardoor grote sets waarden in \u00e9\u00e9n operatie effici\u00ebnt kunnen worden verwerkt.<br \/>\n<br \/>Bron: <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 5.0.3 - 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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