{"id":113031,"date":"2024-01-21T17:28:02","date_gmt":"2024-01-21T15:28:02","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-subd-sqlite-3-45"},"modified":"2024-01-21T17:28:02","modified_gmt":"2024-01-21T15:28:02","slug":"vypusk-subd-sqlite-3-45","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/vypusk-subd-sqlite-3-45","title":{"rendered":"Udgivelse af SQLite-databasesystem 3.45","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>SQLite 3.45 er blevet frigivet, en letv\u00e6gts DBMS, der er designet som et plug-in bibliotek. Koden til SQLite er offentlig ejendom, hvilket betyder, at den kan bruges uden begr\u00e6nsninger og gratis til enhver form\u00e5l. Den finansielle st\u00f8tte til SQLite-udviklerne gives af et s\u00e6rligt konsortium, der inkluderer virksomheder som Bentley, Bloomberg, Expensify og Navigation Data Standard.    <\/p>\n<p>Vigtige \u00e6ndringer:  <\/p>\n<ul>\n<li class=\"l\"> Alle SQL-funktioner til arbejde med JSON-formatet er blevet omskrevet og konverteret til et nyt internt format for JSONB-parsetr\u00e6et, som kan serialiseres og gemmes i databasen for at undg\u00e5 gentagen parsing ved brug af JSON-v\u00e6rdier. De nye versioner af funktionerne, der genererer JSON, producerer nu det bin\u00e6re JSONB-format i stedet for tekstformatet. Den valgfri anden parameter er blevet tilf\u00f8jet til funktionen json_valid(), som kan specificeres med en bitmaske, der definerer egenskaberne ved korrekt JSON (for eksempel vil en angivelse af 0x04 anerkende en blob JSONB som korrekt, ved 0x01 vil tekst JSON i RFC-8259-formatet blive anerkendt, og ved 0x05 begge varianter).\n<li class=\"l\"> Til den virtuelle tabel FTS5, der anvendes til fuldteksts\u00f8gning, er der tilf\u00f8jet muligheden for tokendata, som muligg\u00f8r brug af egne tokenizere.\n<li class=\"l\"> Som standard er SQLITE_DIRECT_OVERFLOW_READ-optimering aktiveret, hvor overflow-sider, der er st\u00f8rre end den standard side st\u00f8rrelse for b-tree, l\u00e6ses direkte fra filen og omg\u00e5r cachen. For at deaktivere det ved bygning kan du bruge indstillingen &#171;-DSQLITE_DIRECT_OVERFLOW_READ=0&#187;.\n<li class=\"l\"> I foresp\u00f8rgselsplanl\u00e6ggeren er effektiviteten af optimeringen af transitive begr\u00e6nsninger forbedret, og der er forbedret ignorering af indekser, som betragtes som lavkvalitets under gennemf\u00f8relsen af ANALYZE-operationen.\n<li class=\"l\"> I kommandolinjegr\u00e6nsefladen er visningen af indhold i UTF-8-kodning p\u00e5 Windows-platformen forbedret. Automatisk detektering af brugen af CLI-gr\u00e6nsefladen er sikret ved afvikling af scripts &#171;.dump&#187; og der foretages relevante \u00e6ndringer i indstillingerne, s\u00e5som &#171;.dbconfig defensive off&#187; og &#171;.dbconfig dqs_dll on&#187;.\n<li class=\"l\"> Det er tilf\u00f8jet en egenskab SQLITE_RESULT_SUBTYPE til SQL-funktioner defineret p\u00e5 applikationssiden, hvilket giver mulighed for at kalde sqlite3_result_subtype() for inspektion af argumenternes undertyper.      <\/ul>\n<p>Yderligere kan udviklingen i de eksperimentelle byggeversioner af SQLite fremh\u00e6ves med en ny transaktionsjournaliseringsmetode \u2014 WAL2 (&#171;PRAGMA journal_mode = wal2&#187;), hvor der bruges to wal-filer (&#171;database-wal&#187; og &#171;database-wal2&#187;) i stedet for \u00e9n. N\u00e5r data skrives til databasen, tilf\u00f8jes nye data til den f\u00f8rste wal-fil. Hvis den f\u00f8rste wal-fil n\u00e5r en tilstr\u00e6kkelig stor st\u00f8rrelse, skiftes der til skrivning i den anden fil. Efter skift til den anden wal-fil bliver den f\u00f8rste tilg\u00e6ngelig for fasts\u00e6ttelse af \u00e6ndringer (checkpoint) og overskrivning. Tilsvarende, n\u00e5r den anden wal-fil n\u00e5r en stor st\u00f8rrelse, skiftes der tilbage til den f\u00f8rste osv., hvilket l\u00f8ser problemet med ukontrolleret v\u00e6kst af wal-filen i situationer, hvor transaktionen ikke fasts\u00e6ttes i lang tid, eller der udf\u00f8res lange l\u00e6seprocesser.<br \/>\n<br \/>Kilde: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=60460\">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 3.45, \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 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043a\u0430\u043a \u043e\u0431\u0449\u0435\u0441\u0442\u0432\u0435\u043d\u043d\u043e\u0435 \u0434\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435 (public domain), \u0442.\u0435. \u043c\u043e\u0436\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c\u0441\u044f \u0431\u0435\u0437 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u0439 \u0438 \u0431\u0435\u0437\u0432\u043e\u0437\u043c\u0435\u0437\u0434\u043d\u043e \u0432 \u043b\u044e\u0431\u044b\u0445 \u0446\u0435\u043b\u044f\u0445. \u0424\u0438\u043d\u0430\u043d\u0441\u043e\u0432\u0443\u044e \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0443 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432 SQLite \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, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0432\u0445\u043e\u0434\u044f\u0442 \u0442\u0430\u043a\u0438\u0435 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438, \u043a\u0430\u043a Bentley, Bloomberg, Expensify \u0438 Navigation Data Standard. \u041e\u0441\u043d\u043e\u0432\u043d\u044b\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f: \u0412\u0441\u0435 SQL-\u0444\u0443\u043d\u043a\u0446\u0438\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-113031","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - 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