{"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\/da\/blog\/news\/dlya-postgresql-podgotovleno-dopolnenie-age-dlya-hraneniya-dannyh-v-forme-grafa","title":{"rendered":"Der er udviklet et till\u00e6g kaldet AGE til PostgreSQL til opbevaring af data i grafform.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Til PostgreSQL er det blevet foresl\u00e5et til PostgreSQL-udviklerne<\/a><\/noindex> udvidelsen AGE (AgensGraph-Extension) med implementeringen af foresp\u00f8rgselssprog openCypher<\/a><\/noindex> til manipulation af s\u00e6t af relaterede hierarkiske data, som danner en graf. I stedet for kolonner og r\u00e6kker bruger graforienterede databaser en struktur, der ligner et netv\u00e6rk \u2014 noder, deres egenskaber og relationer mellem noderne defineres. distribueres<\/a><\/noindex> under Apache 2.0 licensen, overdraget af Bitnine til Apache Foundation og i \u00f8jeblikket placeret i Apache-inkubatoren. <\/p>\n

Projektet forts\u00e6tter udviklingen af databasesystemet AgensGraph<\/a><\/noindex>, som repr\u00e6senterer<\/a><\/noindex> en modificeret version af PostgreSQL til grafbehandling. Den vigtigste forskel er implementeringen af AGE som et universelt plugin, der fungerer som et lag oven p\u00e5 de standardudgivelser af PostgreSQL. Den for nylig offentliggjorte version Apache AGE 0.2.0<\/a><\/noindex> underst\u00f8tter arbejde med PostgreSQL 11.<\/p>\n

I den nuv\u00e6rende tilstand tilbyder AGE even Linus Torvalds himself \u2014 he called the WireGuard code \"a work of art.\"<\/a><\/noindex> mulighederne i foresprog Cypher, s\u00e5som brugen af udtrykket \u00abCREATE\u00bb til at definere noder og forbindelser, udtrykket \u00abMATCH\u00bb til at finde data i grafen under specificerede betingelser (WHERE), i den angivne r\u00e6kkef\u00f8lge (ORDER BY) og med fastsatte begr\u00e6nsninger (SKIP, LIMIT). Det resulterende datas\u00e6t, der returneres af foresp\u00f8rgslen, defineres ved hj\u00e6lp af udtrykket \u00abRETURN\u00bb. For at k\u00e6de flere foresp\u00f8rgsler sammen er udtrykket \u00abWITH\u00bb tilg\u00e6ngeligt. <\/p>\n

Det er muligt at oprette multimodel databaser, der kombinerer modeller for hierarkisk opbevaring af egenskaber i form af graf, den relationelle model og modellen for opbevaring af dokumenter i JSON-format. Der underst\u00f8ttes udf\u00f8relse af integrerede foresp\u00f8rgsler, der inkluderer elementer fra SQL og Cypher-sprog.
\nDet er muligt at oprette indekser for egenskaberne ved noder og kanter i grafen.
\nTil brug er der foresl\u00e5et et udvidet s\u00e6t af Agtype-typer, der omfatter typer til kanter, noder og stier i grafen. Aggregerede udtryk er endnu ikke implementeret. Blandt de tilg\u00e6ngelige specialfunktioner er: id, start_id, end_id, type, properties, head, last, length, size, startNode, endNode, timestamp, toBoolean, toFloat, toInteger og coalesce. <\/p>\n

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

Kilde: 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\udd47Der er forberedt en udvidelse AGE til PostgreSQL til opbevaring af data i form af graf | ProHoster","description":"Til PostgreSQL er der foresl\u00e5et en udvidelse AGE (AgensGraph-Extension) med implementeringen af 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