{"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\/sv\/blog\/news\/vypusk-subd-sqlite-3-51","title":{"rendered":"Utg\u00e5van av databashanteraren SQLite 3.51","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Release av SQLite 3.51 har publicerats, en l\u00e4ttviktsdatabashanterare utformad som ett pluginbibliotek. Koden f\u00f6r SQLite distribueras som offentlig egendom (public domain), det vill s\u00e4ga den kan anv\u00e4ndas utan begr\u00e4nsningar och kostnadsfritt f\u00f6r alla \u00e4ndam\u00e5l. Den ekonomiska st\u00f6det f\u00f6r SQLite-utvecklarna ges av ett s\u00e4rskilt bildat konsortium.     <\/p>\n<p>Huvudsakliga f\u00f6r\u00e4ndringar:  <\/p>\n<ul>\n<li class=\"l\"> Nya JSON-funktioner jsonb_each() och jsonb_tree() har lagts till, vilka skiljer sig fr\u00e5n de tidigare tillg\u00e4ngliga funktionerna json_each() och json_tree() genom att de returnerar v\u00e4rden i JSONB f\u00f6r data med typ av array eller objekt.\n<li class=\"l\"> Kodarna f\u00f6r carray och percentile har flyttats till den grundl\u00e4ggande filen &#171;sqlite3.c&#187; med inb\u00e4ddad SQLite-kod. Som standard \u00e4r dessa till\u00e4gg avst\u00e4ngda och kr\u00e4ver angivande av byggparameterna &#171;-DSQLITE_ENABLE_CARRAY&#187; och &#171;-DSQLITE_ENABLE_PERCENTILE&#187;.\n<li class=\"l\"> Gr\u00e4nssnittet f\u00f6r att anv\u00e4nda SQLite i Tcl-skript har f\u00f6rb\u00e4ttrats. Flaggan &#171;-asdict&#187; har lagts till kommandot &#171;eval&#187; f\u00f6r att st\u00e4lla in str\u00e4ngar med typ &#171;dict&#187; ist\u00e4llet f\u00f6r &#171;array&#187;. Det har ocks\u00e5 lagts till m\u00f6jlighet att avbryta anv\u00e4ndardefinierade funktioner f\u00f6r att \u00e5terl\u00e4mna NULL.\n<li class=\"l\"> \u00c4ndringar i kommandoradsgr\u00e4nssnittet:\n<ul>\n<li class=\"l\"> Precisionen av kommandot &#171;.timer&#187; har \u00f6kat till mikrosekunder;\n<li class=\"l\"> I formatl\u00e4gena &#171;box&#187; och &#171;column&#187; har st\u00f6d f\u00f6r tecken med dubbla bredder implementerats;\n<li class=\"l\"> Kommandot &#171;.imposter&#187; kan nu tillhandah\u00e5lla imposter-tabeller i skrivskyddat l\u00e4ge (ger \u00e5tkomst till data i indexet som en tabell), fungerar med operationen VACUUM och kr\u00e4ver inte att det k\u00f6rs med flaggan &#171;&#8212;unsafe-testing&#187;.\n<li class=\"l\"> Till sqlite-verktyget och kommandot &#171;.open&#187; har alternativet &#171;&#8212;ifexists&#187; lagts till.\n<li class=\"l\"> Den maximala raden som st\u00e4lls in med kommandot &#171;.width&#187; \u00e4r begr\u00e4nsad till 30000 tecken.   <\/ul>\n<li class=\"l\"> Prestandaoptimeringar har genomf\u00f6rts:\n<ul>\n<li class=\"l\"> CPU-belastningen har minskats vid l\u00e5sning av transaktioner begr\u00e4nsade till l\u00e4s\u00e5tkomst;\n<li class=\"l\"> Koden f\u00f6r sammanslagningsoperationer (JOIN) har f\u00f6rb\u00e4ttrats som inte \u00e5terv\u00e4nder rader eftersom en eller flera tabeller inte inneh\u00e5ller rader;\n<li class=\"l\"> K\u00f6rning av skalarunderfr\u00e5gor som inte p\u00e5verkar resultatet har uteslutits;\n<li class=\"l\"> Prestandan f\u00f6r f\u00f6nsterfunktioner i f\u00f6rfr\u00e5gningar med uttrycket &#171;BETWEEN \ud83d\ude21 FOLLOWING AND :y FOLLOWING&#187; och med en mycket stor v\u00e4rde &#171;:y&#187; har accelererats.   <\/ul>\n<li class=\"l\"> Pragma &#171;PRAGMA wal_checkpoint=NOOP&#187; och API-funktionen sqlite3_wal_checkpoint() har lagts till f\u00f6r att beg\u00e5 \u00e4ndringar i WAL-loggen.\n<li class=\"l\"> Funktionerna sqlite3_set_errmsg() och sqlite3_db_status64() har lagts till i API.\n<li class=\"l\"> I JavaScript\/WASM-versionen av SQLite har st\u00f6d f\u00f6r byggande i WebAssembly-format med 64-bitars pekare implementerats.\n<li class=\"l\"> \u00d6kad motst\u00e5ndskraft mot databasfel i applikationer som tar bort POSIX-l\u00e5s via close()-anrop.\n<li class=\"l\"> F\u00f6rb\u00e4ttrat st\u00f6d f\u00f6r VxWorks-plattformen.      <\/ul>\n<p>K\u00e4lla: <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 \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0430\u0435\u043c\u043e\u0439 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[&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 5.0.4 - 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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