{"id":147391,"date":"2025-11-05T17:11:54","date_gmt":"2025-11-05T15:11:54","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-subd-sqlite-3-51"},"modified":"2025-11-05T17:11:54","modified_gmt":"2025-11-05T15:11:54","slug":"vypusk-subd-sqlite-3-51","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/vypusk-subd-sqlite-3-51","title":{"rendered":"Udgivelsen af SQLite 3.51","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>SQLite 3.51 er udgivet, en letv\u00e6gtsdatabase, der pr\u00e6senteres som et plugin-bibliotek. Koden til SQLite distribueres som offentlig ejendom (public domain), hvilket betyder, at den kan bruges uden begr\u00e6nsninger og gratis til enhver form\u00e5l. Den finansielle st\u00f8tte til SQLite-udviklerne leveres af et specifikt oprettet konsortium.     <\/p>\n<p>Vigtige \u00e6ndringer:  <\/p>\n<ul>\n<li class=\"l\"> Der er tilf\u00f8jet nye JSON-funktioner jsonb_each() og jsonb_tree(), som adskiller sig fra de tidligere tilg\u00e6ngelige funktioner json_each() og json_tree() ved at returnere JSONB-v\u00e6rdier for data af typen array eller objekt.\n<li class=\"l\"> Koden for carray- og percentile-udvidelser er blevet flyttet til den grundl\u00e6ggende fil &#171;sqlite3.c&#187; med indlejret SQLite-kode. Som standard er disse udvidelser deaktiveret og kr\u00e6ver angivelse af parameterne &#171;-DSQLITE_ENABLE_CARRAY&#187; og &#171;-DSQLITE_ENABLE_PERCENTILE&#187; ved kompilering.\n<li class=\"l\"> Interface til brug af SQLite i Tcl-scripts er blevet forbedret. Kommandoen &#171;eval&#187; har f\u00e5et tilf\u00f8jet flaget &#171;-asdict&#187; for at tilbagelevere strenge som en &#171;dict&#187; type i stedet for en &#171;array&#187;. Muligheden for at afbryde brugerdefinerede funktioner for at returnere NULL-v\u00e6rdien er blevet tilf\u00f8jet.\n<li class=\"l\"> \u00c6ndringer i kommandolinjegr\u00e6nsefladen:\n<ul>\n<li class=\"l\"> Pr\u00e6cisionen af kommandoen &#171;.timer&#187; er blevet \u00f8get til mikrosekunder;\n<li class=\"l\"> I formatteringsmoduserne &#171;box&#187; og &#171;column&#187; er der blevet implementeret underst\u00f8ttelse for dobbeltbredde-tegn;\n<li class=\"l\"> Kommandoen &#171;.imposter&#187; kan nu levere imposter-tabeller i skrivebeskyttet tilstand (som tillader adgang til data i indekset som en tabel), der arbejder med VACUUM-operationer og ikke kr\u00e6ver at k\u00f8re med flaget &#171;&#8212;unsafe-testing&#187;;\n<li class=\"l\"> Til sqlite-v\u00e6rkt\u00f8jet og kommandoen &#171;.open&#187; er der tilf\u00f8jet en mulighed &#171;&#8212;ifexists&#187;.\n<li class=\"l\"> Den maksimale r\u00e6kkevidde for strengen, som kan indstilles med kommandoen &#171;.width&#187;, er begr\u00e6nset til 30000 tegn.   <\/ul>\n<li class=\"l\"> Der er blevet gennemf\u00f8rt ydeevneoptimeringer:\n<ul>\n<li class=\"l\"> CPU-belastningen er reduceret ved at l\u00e5se transaktioner, der er begr\u00e6nset til l\u00e6seadgang;\n<li class=\"l\"> Forbedret opdagelse af sammenf\u00f8jningsoperationer (JOIN), der ikke returnerer r\u00e6kker, fordi en eller flere tabeller ikke indeholder r\u00e6kker;\n<li class=\"l\"> Udf\u00f8relse af skalarunder-sp\u00f8rgsm\u00e5l, der ikke p\u00e5virker resultatet, er udelukket;\n<li class=\"l\"> Ydeevnen for vinduesfunktioner i foresp\u00f8rgsler med udtrykket &#171;BETWEEN \ud83d\ude21 FOLLOWING AND :y FOLLOWING&#187; og en meget stor v\u00e6rdi &#171;:y&#187; er blevet forbedret.   <\/ul>\n<li class=\"l\"> Der er tilf\u00f8jet pragmaen &#171;PRAGMA wal_checkpoint=NOOP&#187; og API-funktionen sqlite3_wal_checkpoint() til at registrere \u00e6ndringer i WAL-loggen.\n<li class=\"l\"> I API'et er der tilf\u00f8jet funktioner sqlite3_set_errmsg() og sqlite3_db_status64().\n<li class=\"l\"> I JavaScript\/WASM-versionen af SQLite er der tilf\u00f8jet st\u00f8tte til bygning i WebAssembly-pr\u00e6sentationen med 64-bit pekere.\n<li class=\"l\"> \u00d8get modstandsdygtighed over for databasedefekter i applikationer, der fjerner POSIX-l\u00e5se via close()-kald.\n<li class=\"l\"> Forbedret support til VxWorks-platformen.      <\/ul>\n<p>Kilde: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=64186\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 SQLite 3.51, \u043b\u0435\u0433\u043a\u043e\u0432\u0435\u0441\u043d\u043e\u0439 \u0421\u0423\u0411\u0414, \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u043e\u0439 \u0432 \u0432\u0438\u0434\u0435 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\u043e\u0441\u0443\u0449\u0435\u0441\u0442\u0432\u043b\u044f\u0435\u0442 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u0441\u043e\u0437\u0434\u0430\u043d\u043d\u044b\u0439 \u043a\u043e\u043d\u0441\u043e\u0440\u0446\u0438\u0443\u043c. \u041e\u0441\u043d\u043e\u0432\u043d\u044b\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f: \u0414\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u044b \u043d\u043e\u0432\u044b\u0435 JSON-\u0444\u0443\u043d\u043a\u0446\u0438\u0438 jsonb_each() \u0438 jsonb_tree(), \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043e\u0442\u043b\u0438\u0447\u0430\u044e\u0442\u0441\u044f \u043e\u0442 \u0440\u0430\u043d\u0435\u0435 \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u044b\u0445 \u0444\u0443\u043d\u043a\u0446\u0438\u0439 json_each() \u0438 json_tree() \u0442\u0435\u043c, [&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-147391","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=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 SQLite 3.51, \u043b\u0435\u0433\u043a\u043e\u0432\u0435\u0441\u043d\u043e\u0439 \u0421\u0423\u0411\u0414, \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u043e\u0439 \u0432 \u0432\u0438\u0434\u0435 \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0430\u0435\u043c\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438. \u041a\u043e\u0434 SQLite 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