{"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\/sv\/blog\/news\/vypusk-subd-sqlite-3-45","title":{"rendered":"Utgivning av databashanteraren SQLite 3.45","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Sl\u00e4ppet av SQLite 3.45 har publicerats, en l\u00e4ttviktsdatabas som \u00e4r utformad som ett bibliotek. Koden f\u00f6r SQLite distribueras som offentlig egendom, vilket inneb\u00e4r att den kan anv\u00e4ndas utan begr\u00e4nsningar och kostnadsfritt f\u00f6r alla \u00e4ndam\u00e5l. Finansieringen av SQLite-utvecklarna st\u00f6ds av en s\u00e4rskilt skapad konsortium, som inkluderar f\u00f6retag som Bentley, Bloomberg, Expensify och Navigation Data Standard.    <\/p>\n<p>Huvudsakliga f\u00f6r\u00e4ndringar:  <\/p>\n<ul>\n<li class=\"l\"> Alla SQL-funktioner f\u00f6r arbete med JSON-formatet har skrivits om och \u00f6versatts till ett nytt internt format f\u00f6r JSONB-parsantr\u00e4d, som serialiseras och kan lagras i databasen f\u00f6r att undvika upprepade analyser av JSON-v\u00e4rden. De nya versionerna av funktionerna som genererar JSON producerar nu det bin\u00e4ra formatet JSONB ist\u00e4llet f\u00f6r textformatet. En valfri andra parameter har lagts till funktionen json_valid(), vilket g\u00f6r det m\u00f6jligt att ange en bitmask som definierar kriterier f\u00f6r korrekt JSON (till exempel, n\u00e4r 0x04 anges, erk\u00e4nns JSONB-blobben som korrekt, n\u00e4r 0x01 anges erk\u00e4nns text-JSON i RFC-8259-format och n\u00e4r 0x05 anges erk\u00e4nns b\u00e5da varianterna).\n<li class=\"l\"> Den virtuella tabellen FTS5, som anv\u00e4nds f\u00f6r fulltexts\u00f6kning, har f\u00e5tt en ny funktion tokendata som g\u00f6r det m\u00f6jligt att anv\u00e4nda egna tokenizers.\n<li class=\"l\"> Som standard \u00e4r optimering av SQLITE_DIRECT_OVERFLOW_READ aktiverad, d\u00e4r overflow-sidor som \u00e4r st\u00f6rre \u00e4n standard b-tree sids storlek l\u00e4ses direkt fr\u00e5n filen, utan att g\u00e5 igenom cachen. F\u00f6r att inaktivera detta vid kompilering kan alternativet \u2018-DSQLITE_DIRECT_OVERFLOW_READ=0\u2019 anv\u00e4ndas.\n<li class=\"l\"> I fr\u00e5geschemal\u00e4ggaren har effektiviteten av optimisering av transitiva begr\u00e4nsningar (transitive constraint) \u00f6kat och ignorerandet av index som bed\u00f6ms som l\u00e5gt kvalitativa under ANALYZE-operationer har f\u00f6rb\u00e4ttrats.\n<li class=\"l\"> I kommandoradsgr\u00e4nssnittet har visningen av inneh\u00e5ll i UTF-8-kodning f\u00f6rb\u00e4ttrats p\u00e5 Windows-plattformen. Automatisk identifiering av anv\u00e4ndningen av CLI-gr\u00e4nssnittet har s\u00e4kerst\u00e4llts vid k\u00f6rning av skript \u2018.dump\u2019 och motsvarande \u00e4ndringar i inst\u00e4llningarna har gjorts, s\u00e5som \u2018.dbconfig defensive off\u2019 och \u2018.dbconfig dqs_dll on\u2019.\n<li class=\"l\"> I SQL-funktioner som definieras p\u00e5 applikationssidan har egenskapen SQLITE_RESULT_SUBTYPE lagts till, vilket till\u00e5ter att funktionen sqlite3_result_subtype() anropas f\u00f6r inspektion av argumentens undertyper.      <\/ul>\n<p>Det kan \u00e4ven n\u00e4mnas att det i experimentella versioner av SQLite har utvecklats ett nytt l\u00e4ge f\u00f6r transaktionsloggning \u2014 WAL2 (\u2018PRAGMA journal_mode = wal2\u2019), d\u00e4r tv\u00e5 wal-filer (\u2018database-wal\u2019 och \u2018database-wal2\u2019) anv\u00e4nds ist\u00e4llet f\u00f6r en. N\u00e4r data skrivs till databasen l\u00e4ggs nya data till i den f\u00f6rsta wal-filen. Om den f\u00f6rsta wal-filen n\u00e5r en tillr\u00e4ckligt stor storlek skiftas skrivningen till den andra filen. Efter att ha v\u00e4xlat till den andra wal-filen blir den f\u00f6rsta tillg\u00e4nglig f\u00f6r avst\u00e4mning (checkpoint) och \u00f6verskrivning. D\u00e4rmed, n\u00e4r den andra wal-filen n\u00e5r stor storlek v\u00e4xlas skrivningen tillbaka till den f\u00f6rsta, och s\u00e5 vidare, vilket l\u00f6ser problemet med okontrollerad tillv\u00e4xt av wal-filen i situationer d\u00e4r transaktionen inte har avst\u00e4mts under l\u00e5ng tid eller d\u00e4r l\u00e5ngvariga l\u00e4sprocesser genomf\u00f6rs.<br \/>\n<br \/>K\u00e4lla: <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 5.0.4 - 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