{"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\/it\/blog\/news\/vypusk-subd-sqlite-3-51","title":{"rendered":"Versione del database SQLite 3.51","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>\u00c8 stata pubblicata la versione 3.51 di SQLite, un database leggero sotto forma di libreria collegabile. Il codice di SQLite \u00e8 distribuito come dominio pubblico, il che significa che pu\u00f2 essere utilizzato senza restrizioni e gratuitamente per qualsiasi scopo. Il supporto finanziario per gli sviluppatori di SQLite \u00e8 fornito da un consorzio appositamente creato.     <\/p>\n<p>Variazioni principali:  <\/p>\n<ul>\n<li class=\"l\"> Sono state aggiunte nuove funzioni JSON jsonb_each() e jsonb_tree(), che si differenziano dalle precedenti funzioni json_each() e json_tree() in quanto restituiscono un valore JSONB per dati di tipo array o oggetto.\n<li class=\"l\"> Il codice delle estensioni carray e percentile \u00e8 stato trasferito nel file di base &#171;sqlite3.c&#187; con codice incorporato di SQLite. Per impostazione predefinita, queste estensioni sono disabilitate e richiedono la specifica dei parametri in fase di compilazione &#171;-DSQLITE_ENABLE_CARRAY&#187; e &#171;-DSQLITE_ENABLE_PERCENTILE&#187;.\n<li class=\"l\"> \u00c8 migliorata l'interfaccia per l'utilizzo di SQLite negli script Tcl. Nella funzione &#171;eval&#187; \u00e8 stato aggiunto il flag &#171;-asdict&#187; per restituire le stringhe utilizzando il tipo &#171;dict&#187; anzich\u00e9 &#171;array&#187;. \u00c8 stata aggiunta la possibilit\u00e0 di interrompere le funzioni personalizzate per restituire un valore NULL.\n<li class=\"l\"> Modifiche all'interfaccia della riga di comando:\n<ul>\n<li class=\"l\"> La precisione del comando &#171;.timer&#187; \u00e8 aumentata fino ai microsecondi;\n<li class=\"l\"> Nei modi di formattazione &#171;box&#187; e &#171;column&#187; \u00e8 stata implementata la supporto per caratteri a larghezza doppia;\n<li class=\"l\"> Il comando &#171;.imposter&#187; ora pu\u00f2 fornire tabelle imposter in sola lettura (che consentono di accedere ai dati nell'indice come a una tabella), funzionando con l'operazione VACUUM e non richiedendo l'esecuzione con il flag &#171;&#8212;unsafe-testing&#187;;\n<li class=\"l\"> Nell'utilit\u00e0 sqlite e nel comando &#171;.open&#187; \u00e8 stata aggiunta l'opzione &#171;&#8212;ifexists&#187;.\n<li class=\"l\"> La larghezza massima della stringa impostata tramite il comando &#171;.width&#187; \u00e8 limitata a 30000 caratteri.   <\/ul>\n<li class=\"l\"> Sono state apportate ottimizzazioni delle prestazioni:\n<ul>\n<li class=\"l\"> Ridotto il carico della CPU durante il commit delle transazioni limitate all'accesso in sola lettura;\n<li class=\"l\"> Migliorato il riconoscimento delle operazioni di join (JOIN) che non restituiscono righe a causa dell'assenza di righe in una o pi\u00f9 tabelle;\n<li class=\"l\"> Evitato l'esecuzione di sottoquery scalari che non influenzano il risultato;\n<li class=\"l\"> Le funzioni di finestra sono state accelerate nelle query con l'espressione &#171;BETWEEN \ud83d\ude21 FOLLOWING AND :y FOLLOWING&#187; e un valore molto elevato per &#171;:y&#187;.   <\/ul>\n<li class=\"l\"> \u00c8 stata aggiunta la pragma &#171;PRAGMA wal_checkpoint=NOOP&#187; e la funzione API sqlite3_wal_checkpoint() per registrare le modifiche nel log WAL.\n<li class=\"l\"> All'API sono state aggiunte le funzioni sqlite3_set_errmsg() e sqlite3_db_status64().\n<li class=\"l\"> Nella versione JavaScript\/WASM di SQLite \u00e8 stato implementato il supporto per la compilazione in WebAssembly con puntatori a 64 bit.\n<li class=\"l\"> \u00c8 stata aumentata la resistenza ai danni del database nelle applicazioni che rimuovono i blocchi POSIX tramite la chiamata close().\n<li class=\"l\"> Migliorato il supporto per la piattaforma VxWorks.      <\/ul>\n<p>Fonte: <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, 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\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. \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 5.0.1.1 - 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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