{"id":88105,"date":"2020-07-12T13:42:29","date_gmt":"2020-07-12T11:42:29","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/dlya-postgresql-podgotovleno-dopolnenie-age-dlya-hraneniya-dannyh-v-forme-grafa"},"modified":"2020-07-12T13:42:29","modified_gmt":"2020-07-12T11:42:29","slug":"dlya-postgresql-podgotovleno-dopolnenie-age-dlya-hraneniya-dannyh-v-forme-grafa","status":"publish","type":"post","link":"https:\/\/prohoster.info\/nl\/blog\/news\/dlya-postgresql-podgotovleno-dopolnenie-age-dlya-hraneniya-dannyh-v-forme-grafa","title":{"rendered":"AGE is een extensie voor PostgreSQL voor het opslaan van gegevens in de vorm van een graaf.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Voor PostgreSQL is voorgesteld<\/a><\/noindex> de extensie AGE (AgensGraph-Extension) met implementatie van de querytaal openCypher<\/a><\/noindex> voor het manipuleren van sets van onderling verbonden hi\u00ebrarchische gegevens, die een grafiek vormen. In plaats van kolommen en rijen gebruiken grafgeori\u00ebnteerde databases een structuur die lijkt op een netwerk \u2014 knooppunten, hun eigenschappen en de relaties tussen de knooppunten worden gedefinieerd. AGE wordt verspreid<\/a><\/noindex> onder de Apache 2.0-licentie, is overgedragen door Bitnine onder de hoede van de Apache Foundation en bevindt zich momenteel in de Apache-incubator. <\/p>\n

Het project blijft de database verder ontwikkelen AgensGraph<\/a><\/noindex>, die vertoont<\/a><\/noindex> een gewijzigde versie van PostgreSQL is die is herschreven voor grafen. Het belangrijkste verschil is de implementatie van AGE in de vorm van een universele extensie die werkt als een laag bovenop de standaardversies van PostgreSQL. De onlangs gepubliceerde versie Apache AGE 0.2.0<\/a><\/noindex> ondersteunt PostgreSQL 11.<\/p>\n

In de huidige staat ondersteunt AGE wordt ondersteund<\/a><\/noindex> de mogelijkheden van de querytaal Cypher, zoals het gebruik van de expressie 'CREATE' voor het defini\u00ebren van knooppunten en verbindingen, de expressie 'MATCH' voor het zoeken naar gegevens in de grafiek op basis van opgegeven voorwaarden (WHERE), in een gespecificeerde volgorde (ORDER BY) en met opgelegde beperkingen (SKIP, LIMIT). De resulterende dataset, die door de query wordt teruggegeven, wordt bepaald met behulp van de expressie 'RETURN'. Voor het combineren van meerdere queries in een keten is de expressie 'WITH' beschikbaar. <\/p>\n

Het is mogelijk om multimodale databases te cre\u00ebren die eigenschapsmodellen in de vorm van een graaf combineren, relationele modellen en documentopslagmodellen in JSON-formaat. Het uitvoeren van ge\u00efntegreerde queries, die elementen van zowel SQL- als Cypher-talen bevatten, wordt ondersteund.
\nHet is mogelijk om indexen te cre\u00ebren voor de eigenschappen van knooppunten en de verbindingen in de graaf.
\nVoor gebruik wordt een uitgebreide set van Agtype-types aangeboden, inclusief types voor verbindingen, knooppunten en paden in de graaf. Aggregaatuitdrukkingen zijn momenteel nog niet ge\u00efmplementeerd. Onder de beschikbare gespecialiseerde functies zijn: id, start_id, end_id, type, properties, head, last, length, size, startNode, endNode, timestamp, toBoolean, toFloat, toInteger en coalesce. <\/p>\n

<\/a><\/noindex><\/p>\n

Bron: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0414\u043b\u044f PostgreSQL \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u043e \u0434\u043e\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 AGE (AgensGraph-Extension) \u0441 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0435\u0439 \u044f\u0437\u044b\u043a\u0430 \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432 openCypher \u0434\u043b\u044f \u043c\u0430\u043d\u0438\u043f\u0443\u043b\u044f\u0446\u0438\u0439 \u0441 \u043d\u0430\u0431\u043e\u0440\u0430\u043c\u0438 \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u0445 \u043c\u0435\u0436\u0434\u0443 \u0441\u043e\u0431\u043e\u0439 \u0438\u0435\u0440\u0430\u0440\u0445\u0438\u0447\u0435\u0441\u043a\u0438\u0445 \u0434\u0430\u043d\u043d\u044b\u0445, \u043e\u0431\u0440\u0430\u0437\u0443\u044e\u0449\u0438\u0445 \u0433\u0440\u0430\u0444. \u0412\u043c\u0435\u0441\u0442\u043e \u0441\u0442\u043e\u043b\u0431\u0446\u043e\u0432 \u0438 \u0441\u0442\u0440\u043e\u043a \u0433\u0440\u0430\u0444\u043e-\u043e\u0440\u0438\u0435\u043d\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u044b\u0435 \u0411\u0414 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0442 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u0443, \u043f\u043e\u0445\u043e\u0436\u0443\u044e \u043d\u0430 \u0441\u0435\u0442\u044c — \u0437\u0430\u0434\u0430\u044e\u0442\u0441\u044f \u0443\u0437\u043b\u044b, \u0438\u0445 \u0441\u0432\u043e\u0439\u0441\u0442\u0432\u0430 \u0438 \u043e\u0442\u043d\u043e\u0448\u0435\u043d\u0438\u044f \u043c\u0435\u0436\u0434\u0443 \u0443\u0437\u043b\u0430\u043c\u0438. AGE \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, \u043f\u0435\u0440\u0435\u0434\u0430\u043d \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0435\u0439 Bitnine \u043f\u043e\u0434 \u043f\u043e\u043a\u0440\u043e\u0432\u0438\u0442\u0435\u043b\u044c\u0441\u0442\u0432\u043e \u0424\u043e\u043d\u0434\u0430 Apache […]<\/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-88105","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\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\udd47AGE is een extensie voor PostgreSQL voor het opslaan van gegevens in de vorm van een graaf | ProHoster","description":"Voor PostgreSQL is de extensie AGE (AgensGraph-Extension) met implementatie van de querytaal 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