{"id":103302,"date":"2022-02-12T03:36:45","date_gmt":"2022-02-12T01:36:45","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/pervyj-stabilnyj-reliz-relyaczionno-grafovoj-subd-edgedb"},"modified":"2022-02-12T03:36:45","modified_gmt":"2022-02-12T01:36:45","slug":"pervyj-stabilnyj-reliz-relyaczionno-grafovoj-subd-edgedb","status":"publish","type":"post","link":"https:\/\/prohoster.info\/fr\/blog\/news\/pervyj-stabilnyj-reliz-relyaczionno-grafovoj-subd-edgedb","title":{"rendered":"Premi\u00e8re version stable de la base de donn\u00e9es relationnelle et graphique EdgeDB","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>La premi\u00e8re version stable du SGBD EdgeDB est maintenant disponible. Il s'agit d'une surcouche \u00e0 PostgreSQL, int\u00e9grant un mod\u00e8le de donn\u00e9es relationnel et graphique ainsi qu'un langage de requ\u00eates EdgeQL, optimis\u00e9 pour la gestion de donn\u00e9es hi\u00e9rarchiques complexes. Le code est d\u00e9velopp\u00e9 en Python et Rust et est distribu\u00e9 sous la licence Apache 2.0. Les biblioth\u00e8ques clientes sont disponibles pour les langages Python, Go, Rust et TypeScript\/Javascript. Un outil en ligne de commande est fourni pour la gestion du SGBD et l'ex\u00e9cution interactive des requ\u00eates (REPL).      <\/p>\n<p>Au lieu d'un mod\u00e8le de donn\u00e9es bas\u00e9 sur des tableaux, EdgeDB utilise un syst\u00e8me d\u00e9claratif bas\u00e9 sur des types d'objets. Au lieu de cl\u00e9s \u00e9trang\u00e8res pour d\u00e9finir la relation entre les types, il utilise le lien par r\u00e9f\u00e9rences (un objet peut \u00eatre utilis\u00e9 comme propri\u00e9t\u00e9 d'un autre objet). type Personne { propri\u00e9t\u00e9 requise nom -&gt; str; } type Film { propri\u00e9t\u00e9 requise titre -&gt; str; lien multiple acteurs -&gt; Personne; }      <\/p>\n<p>Pour acc\u00e9l\u00e9rer le traitement des requ\u00eates, des index peuvent \u00eatre utilis\u00e9s. Des fonctionnalit\u00e9s telles que la typage strict des propri\u00e9t\u00e9s, les contraintes de valeurs des propri\u00e9t\u00e9s, les propri\u00e9t\u00e9s calcul\u00e9es et les proc\u00e9dures stock\u00e9es sont \u00e9galement support\u00e9es. Parmi les caract\u00e9ristiques du sch\u00e9ma de stockage orient\u00e9 objet d'EdgeDB, qui rappelle quelque peu les ORM, on note la possibilit\u00e9 de m\u00e9langer les sch\u00e9mas, de lier des propri\u00e9t\u00e9s provenant de diff\u00e9rents objets et le support int\u00e9gr\u00e9 de JSON.     <\/p>\n<p>Des outils int\u00e9gr\u00e9s pour la migration de sch\u00e9mas de stockage sont fournis : apr\u00e8s une modification du sch\u00e9ma d\u00e9fini dans un fichier esdl s\u00e9par\u00e9, il suffit d'ex\u00e9cuter la commande \u00ab edgedb migration create \u00bb et le SGBD analysera les diff\u00e9rences de sch\u00e9ma et g\u00e9n\u00e9rera un script pour effectuer la transition vers le nouveau sch\u00e9ma en mode interactif. L'historique des modifications de sch\u00e9ma est automatiquement suivi.    <\/p>\n<p>Pour la formation des requ\u00eates, EdgeDB prend en charge \u00e0 la fois le langage de requ\u00eates GraphQL et son propre langage EdgeDB, qui est une adaptation du SQL pour les donn\u00e9es hi\u00e9rarchiques. Au lieu de listes, les r\u00e9sultats des requ\u00eates sont pr\u00e9sent\u00e9s sous forme structur\u00e9e, et au lieu de sous-requ\u00eates et d'op\u00e9rations JOIN, il est possible d'indiquer une requ\u00eate EdgeQL comme expression \u00e0 l'int\u00e9rieur d'une autre requ\u00eate. Les transactions et les boucles sont prises en charge. select Film { titre, acteurs: { nom } } filter .titre = \u00ab The Matrix \u00bb insert Film { titre := \u00ab The Matrix Resurrections \u00bb, acteurs := ( select Personne filter .nom in { 'Keanu Reeves', 'Carrie-Anne Moss', 'Laurence Fishburne' } ) } for number in {0, 1, 2, 3} union ( select { number, number + 0.5 } );<br \/>\n<br \/>Source : <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=56682\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u043f\u0435\u0440\u0432\u044b\u0439 \u0441\u0442\u0430\u0431\u0438\u043b\u044c\u043d\u044b\u0439 \u0440\u0435\u043b\u0438\u0437 \u0421\u0423\u0411\u0414 EdgeDB, \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0443\u044e \u0441\u043e\u0431\u043e\u0439 \u043d\u0430\u0434\u0441\u0442\u0440\u043e\u0439\u043a\u0443 \u043d\u0430\u0434 PostgreSQL \u0441 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0435\u0439 \u0440\u0435\u043b\u044f\u0446\u0438\u043e\u043d\u043d\u043e-\u0433\u0440\u0430\u0444\u043e\u0432\u043e\u0439 \u043c\u043e\u0434\u0435\u043b\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 \u0438 \u044f\u0437\u044b\u043a\u0430 \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432 EdgeQL, \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u0434\u043b\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u0441\u043e \u0441\u043b\u043e\u0436\u043d\u044b\u043c\u0438 \u0438\u0435\u0440\u0430\u0440\u0445\u0438\u0447\u0435\u0441\u043a\u0438\u043c\u0438 \u0434\u0430\u043d\u043d\u044b\u043c\u0438. \u041a\u043e\u0434 \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043d\u0430 \u044f\u0437\u044b\u043a\u0430\u0445 Python \u0438 Rust \u0438 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 Apache 2.0. \u041a\u043b\u0438\u0435\u043d\u0442\u0441\u043a\u0438\u0435 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 \u043f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043b\u0435\u043d\u044b \u0434\u043b\u044f \u044f\u0437\u044b\u043a\u043e\u0432 Python, Go, Rust \u0438 TypeScript\/Javascript. \u041f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u0439 \u043a\u043e\u043c\u0430\u043d\u0434\u043d\u043e\u0439 \u0441\u0442\u043e\u043a\u0438 \u0434\u043b\u044f [&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-103302","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2 - 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