{"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\/it\/blog\/news\/vypusk-subd-sqlite-3-45","title":{"rendered":"Rilascio del DBMS SQLite 3.45","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>\u00c8 stato pubblicato il rilascio di SQLite 3.45, un sistema di gestione di database leggero, fornito come libreria dinamica. Il codice di SQLite \u00e8 distribuito come dominio pubblico, ovvero 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, che include aziende come Bentley, Bloomberg, Expensify e Navigation Data Standard.    <\/p>\n<p>Variazioni principali:  <\/p>\n<ul>\n<li class=\"l\"> Tutte le funzioni SQL per lavorare con il formato JSON sono state riscritte e tradotte in un nuovo formato interno ad albero di parsing JSONB, che viene serializzato e pu\u00f2 essere memorizzato nel database per escludere il riesame durante l'uso dei valori JSON. Le nuove versioni delle funzioni che generano JSON ora producono il formato binario JSONB invece di quello testuale. Nella funzione json_valid() \u00e8 stato aggiunto un secondo argomento facoltativo, attraverso il quale \u00e8 possibile specificare una maschera di bit che definisce le caratteristiche di un JSON valido (ad esempio, specificando 0x04, si riconoscer\u00e0 un blob JSONB come valido, specificando 0x01, il JSON testuale nel formato RFC-8259, e specificando 0x05, entrambi i formati).\n<li class=\"l\"> Nella tabella virtuale FTS5, utilizzata per la ricerca a testo completo, \u00e8 stata aggiunta l'opzione tokendata, che consente di utilizzare tokenizer personalizzati.\n<li class=\"l\"> Per impostazione predefinita, l'ottimizzazione SQLITE_DIRECT_OVERFLOW_READ \u00e8 attivata, grazie alla quale le pagine di overflow, le cui dimensioni superano quelle standard delle pagine b-tree, vengono lette direttamente dal file, bypassando la cache. Per disattivarlo durante la compilazione, \u00e8 possibile utilizzare l'opzione '-DSQLITE_DIRECT_OVERFLOW_READ=0'.\n<li class=\"l\"> Nell'ottimizzatore delle query \u00e8 stata migliorata l'efficienza dell'ottimizzazione dei vincoli transitivi e migliorato il modo in cui vengono ignorati gli indici considerati di bassa qualit\u00e0 durante l'esecuzione dell'operazione ANALYZE.\n<li class=\"l\"> Nell'interfaccia della riga di comando, \u00e8 stato migliorato il rendering del contenuto in codifica UTF-8 sulla piattaforma Windows. \u00c8 stata garantita l'autodeterminazione dell'uso dell'interfaccia CLI durante l'esecuzione degli script '.dump' e sono state apportate le modifiche del caso alle impostazioni, come '.dbconfig defensive off' e '.dbconfig dqs_dll on'.\n<li class=\"l\"> Nelle funzioni SQL definite a livello dell'applicazione \u00e8 stata aggiunta la propriet\u00e0 SQLITE_RESULT_SUBTYPE, che consente di chiamare la funzione sqlite3_result_subtype() per ispezionare i sottotipi degli argomenti.      <\/ul>\n<p>Inoltre, si pu\u00f2 notare lo sviluppo in versioni sperimentali di SQLite di una nuova modalit\u00e0 di registrazione delle transazioni \u2014 WAL2 ('PRAGMA journal_mode = wal2'), in cui vengono utilizzati due file wal ('database-wal' e 'database-wal2') anzich\u00e9 uno solo. Quando si registrano dati nel database, i nuovi dati vengono aggiunti al primo file wal. Se il primo file wal raggiunge dimensioni sufficientemente grandi, si passa alla registrazione nel secondo file. Dopo il passaggio al secondo file wal, il primo diventa disponibile per la registrazione delle modifiche (checkpoint) e la sovrascrittura. Quindi, quando il secondo file wal raggiunge dimensioni elevate, si ripassa al primo e cos\u00ec via, risolvendo il problema della crescita incontrollata del file wal in situazioni in cui le transazioni non vengono registrate a lungo o vengono eseguiti processi di lettura prolungati.<br \/>\n<br \/>Fonte: <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 5.0.1.1 - 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