{"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\/pt\/blog\/news\/pervyj-stabilnyj-reliz-subd-duckdb","title":{"rendered":"Primeiro lan\u00e7amento est\u00e1vel do SGBD DuckDB","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Ap\u00f3s seis anos de desenvolvimento, o lan\u00e7amento do SGBD DuckDB 1.0 foi apresentado, posicionado como uma alternativa ao SQLite para consultas anal\u00edticas. O DuckDB combina caracter\u00edsticas do SQLite, como compacta\u00e7\u00e3o, possibilidade de conex\u00e3o na forma de uma biblioteca embutida, armazenamento do banco de dados em um \u00fanico arquivo e uma interface de linha de comando amig\u00e1vel, com ferramentas e otimiza\u00e7\u00f5es para a execu\u00e7\u00e3o de consultas anal\u00edticas que abrangem uma parte significativa dos dados armazenados, como a agrega\u00e7\u00e3o de todo o conte\u00fado das tabelas ou a fus\u00e3o de v\u00e1rias tabelas grandes. O c\u00f3digo do projeto \u00e9 escrito em C++ e \u00e9 distribu\u00eddo sob a licen\u00e7a MIT.     <\/p>\n<p>A vers\u00e3o 1.0 \u00e9 marcada como o primeiro lan\u00e7amento est\u00e1vel do projeto, no qual o foco principal foi aumentar a estabilidade, em vez de expandir a funcionalidade. Na nova vers\u00e3o, tamb\u00e9m foi fixado o formato de armazenamento de dados, para o qual, a partir do lan\u00e7amento passado, foi garantida a compatibilidade retroativa. Nos lan\u00e7amentos futuros, os desenvolvedores pretendem ser mais cautelosos ao adicionar novas funcionalidades e cuidar da preserva\u00e7\u00e3o da compatibilidade entre os lan\u00e7amentos, assim como estabilizar o dialecto SQL e a API C. Se no futuro for necess\u00e1ria alguma altera\u00e7\u00e3o na sem\u00e2ntica SQL, os desenvolvedores publicar\u00e3o um aviso antecipado sobre as mudan\u00e7as iminentes e fornecer\u00e3o solu\u00e7\u00f5es alternativas para manter a funcionalidade do c\u00f3digo existente.      <\/p>\n<p>O DuckDB suporta um dialecto SQL expandido, incluindo recursos adicionais para o processamento de consultas muito complexas e de longa dura\u00e7\u00e3o. Por exemplo, \u00e9 poss\u00edvel utilizar tipos complexos (arrays, estruturas, uni\u00f5es), assim como executar subconsultas correlacionadas arbitr\u00e1rias e aninhadas. \u00c9 suportada a execu\u00e7\u00e3o simult\u00e2nea de v\u00e1rias consultas, a execu\u00e7\u00e3o de consultas diretamente de arquivos nos formatos CSV e Parquet. O suporte \u00e0 importa\u00e7\u00e3o de SGBDs PostgreSQL tamb\u00e9m est\u00e1 dispon\u00edvel.    <\/p>\n<p>Al\u00e9m do c\u00f3digo de shell do SQLite, o projeto utiliza um parser separado da biblioteca PostgreSQL, o componente Date Math do MonetDB, sua pr\u00f3pria implementa\u00e7\u00e3o de fun\u00e7\u00f5es de janelas (baseada no algoritmo Segment Tree Aggregation), um manipulador de express\u00f5es regulares baseado na biblioteca RE2, seu pr\u00f3prio otimizador de consultas, um mecanismo de controle de concorr\u00eancia de m\u00faltiplas vers\u00f5es (Multi-Version Concurrency Control), bem como um motor de execu\u00e7\u00e3o de consultas vetorizado baseado no algoritmo Hyper-Pipelining Query Execution, permitindo processar grandes conjuntos de valores em uma \u00fanica opera\u00e7\u00e3o.<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 5.0.3 - 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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