{"id":168285,"date":"2026-04-10T11:12:04","date_gmt":"2026-04-10T09:12:04","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-subd-sqlite-3-53"},"modified":"2026-04-10T11:12:04","modified_gmt":"2026-04-10T09:12:04","slug":"vypusk-subd-sqlite-3-53","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/vypusk-subd-sqlite-3-53","title":{"rendered":"Udgivelse af SQLite-databasesystem 3.53","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Udgivelsen af SQLite 3.53 er offentliggjort, et letv\u00e6gts databasesystem, der er udformet som et tilslutningsbibliotek. Udgivelsen 3.52 blev annulleret. Koden til SQLite distribueres som offentlig dom\u00e6ne, dvs. den kan bruges uden begr\u00e6nsninger og gratis til enhver form\u00e5l. Finansieringen af SQLite-udviklerne sker gennem et specialoprettet konsortium.     <\/p>\n<p>Vigtige \u00e6ndringer:  <\/p>\n<ul>\n<li class=\"l\"> En fejl, der kunne f\u00f8re til beskadigelse af databasen, er blevet rettet. Problemet eksisterede fra version SQLite 3.7.0 (2010), p\u00e5virkede databaser i WAL-tilstand (Write-Ahead Logging) og kom til udtryk gennem en kapl\u00f8bssituation, n\u00e5r to eller flere forbindelser til databasen skulle \u00e5bnes samtidig, og fors\u00f8gte at skrive eller bekr\u00e6fte transaktioner i et enkelt databaseeksemplar. Det h\u00e6vdes, at den fejltilstand, der f\u00f8rer til nedbrud, optr\u00e6der ekstremt sj\u00e6ldent, og den kunne kun genskabes i et specielt designet testsituation.\n<li class=\"l\"> I teamet &#171;ALTER TABLE&#187; er det tilladt at fjerne &#171;NOT NULL&#187; og &#171;CHECK&#187; tjek.\n<li class=\"l\"> Der er tilf\u00f8jet en kommando &#171;REINDEX EXPRESSIONS&#187; til genopbygning af indekser baseret p\u00e5 udtryk, hvor funktionen anvendes p\u00e5 kolonner eller operationer p\u00e5 kolonner. Kommandoen kan bruges til at gendanne uddaterede indekser.\n<li class=\"l\"> Inden for de midlertidige triggere, der oprettes af kommandoen &#171;CREATE TEMP TRIGGER&#187; og anvendes p\u00e5 tabeller i andre databaser, er det tilladt at \u00e6ndre tabeller eller foresp\u00f8rge data fra tabeller.\n<li class=\"l\"> I kommandoen &#171;VACUUM INTO&#187;, ved angivelse af en destinationsfil via URL, er der implementeret en parameter &#171;reserve=N&#187; for at bestemme antallet af oprettede sikkerhedskopier af databasen.\n<li class=\"l\"> Nye SQL-funktioner json_array_insert() og jsonb_array_insert() til inds\u00e6ttelse af elementer i JSON-arrays er blevet implementeret.\n<li class=\"l\"> Biblioteket QRF (Query Result Formatter) er tilf\u00f8jet og aktiveret i kommandolinjev\u00e6rkt\u00f8jet til formatering af resultaterne af SQL-foresp\u00f8rgsler i et l\u00e6sevenligt format.\n<li class=\"l\"> \u00c6ndringer i kommandolinjev\u00e6rkt\u00f8jet:\n<ul>\n<li class=\"l\"> Kommandoen &#171;.mode&#187; er blevet betydeligt udvidet.\n<li class=\"l\">  Udformningen af output er forbedret, for eksempel er tegns\u00e6ttet som standard aktiveret, og numeriske v\u00e6rdier justeres nu til h\u00f8jre ved tabeloutput.\n<li class=\"l\"> Der er sikret, at tegnene &#171;;&#187; efter kommandoer ignoreres.\n<li class=\"l\"> Indholdet af filer angivet i kommandolinjen med filtyperne *.sql og *.txt l\u00e6ses og tolkes nu som s\u00e6t af SQL-udtryk og dot-kommandoer.\n<li class=\"l\"> Der er tilf\u00f8jet underst\u00f8ttelse af v\u00e6rdien &#171;once&#187; til kommandoen &#171;.timer&#187; for kun at anvende timeren p\u00e5 den n\u00e6ste SQL-udtryk.\n<li class=\"l\">  Der er tilf\u00f8jet en mulighed &#171;--timeout S&#187; til kommandoen &#171;.progress&#187; for at tvinge et stop af SQL-udtrykket efter udl\u00f8b af timeout.\n<li class=\"l\"> I kommandoen &#171;.indexes&#187; er adf\u00e6rden for skabeloner \u00e6ndret, s\u00e5 de nu anvendes p\u00e5 indeksnavne i stedet for navne p\u00e5 de indekserede tabeller.      <\/ul>\n<li class=\"l\"> Optimeringer er foretaget i foresp\u00f8rgselsplanl\u00e6ggeren, som har fremskyndet arbejdet med at fusionere tabeller samt operationer som ECEPT, INTERSECT og UNION.\n<li class=\"l\"> Ydeevnen for funktioner, der konverterer flydende tal til tekstrepr\u00e6sentation, er blevet forbedret.\n<li class=\"l\"> I implementeringen, der kompiles til WebAssembly mellemkode, er der tilf\u00f8jet VFS &#171;opfs-wl&#187;, som er identisk med VFS &#171;opfs&#187;, men bruger API Web Locks til h\u00e5ndtering af l\u00e5se.\n<li class=\"l\"> I v\u00e6rkt\u00f8jet sqlite3_rsync er der tilf\u00f8jet en mulighed &#171;-p|--port&#187;.\n<li class=\"l\"> Underst\u00f8ttelsen af Windows RT-platformen er blevet stoppet.        <\/ul>\n<p>Kilde: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=65182\">opennet.ru<\/a> 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