{"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\/it\/blog\/news\/vypusk-subd-sqlite-3-53","title":{"rendered":"Pubblicazione del DBMS SQLite 3.53","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>\u00c8 stato rilasciato SQLite 3.53, un database leggero organizzato come una libreria collegabile. Il rilascio 3.52 \u00e8 stato annullato. Il codice di SQLite \u00e8 distribuito come pubblico dominio, 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\"> \u00c8 stato risolto un bug che causava la corruzione del database. Il problema era presente a partire dalla versione SQLite 3.7.0 (2010), interessando i database in modalit\u00e0 WAL (Write-Ahead Logging) e si manifestava a causa di una condizione di gara durante l'accesso simultaneo di due o pi\u00f9 connessioni al database che cercavano di registrare o confermare le transazioni in un'unica istanza del database. Si afferma che l'insieme di circostanze che porta al crash si verifica molto raramente e \u00e8 stato possibile riprodurlo solo in uno scenario di test appositamente creato.\n<li class=\"l\"> Nel comando &#171;ALTER TABLE&#187; \u00e8 consentito rimuovere i controlli &#171;NOT NULL&#187; e &#171;CHECK&#187;.\n<li class=\"l\"> \u00c8 stato aggiunto il comando &#171;REINDEX EXPRESSIONS&#187; per ricostruire gli indici basati su espressioni dove come elemento dell'indice viene utilizzata una funzione su una colonna o operazioni su colonne. Il comando pu\u00f2 essere utilizzato per recuperare indici scaduti.\n<li class=\"l\"> All'interno dei trigger temporanei creati dal comando &#171;CREATE TEMP TRIGGER&#187; e applicati a tabelle in altri database, \u00e8 consentita la modifica delle tabelle o la richiesta di dati dalle tabelle.\n<li class=\"l\"> Nel comando &#171;VACUUM INTO&#187;, specificando il file di destinazione tramite URL, \u00e8 implementato l'uso del parametro &#171;reserve=N&#187; per determinare il numero di backup del database creati.\n<li class=\"l\"> Sono state implementate nuove funzioni SQL json_array_insert() e jsonb_array_insert() per inserire elementi negli array JSON.\n<li class=\"l\"> \u00c8 stata aggiunta e attivata nella utility della riga di comando la libreria QRF (Query Result Formatter) per formattare i risultati dell'esecuzione delle query SQL in un formato leggibile.\n<li class=\"l\"> Modifiche all'utility della riga di comando:\n<ul>\n<li class=\"l\"> \u00c8 stato notevolmente ampliato il comando &#171;.mode&#187;.\n<li class=\"l\">  Migliorata l'output, ad esempio, il disegno dei bordi \u00e8 abilitato di default e i valori numerici sono ora allineati a destra nell'output tabulato.\n<li class=\"l\"> \u00c8 stato garantito di ignorare i caratteri &#171;;&#187; dopo i comandi.\n<li class=\"l\"> Il contenuto dei file specificati nella riga di comando con estensioni *.sql e *.txt \u00e8 ora letto e interpretato come insiemi di espressioni SQL e comandi dot.\n<li class=\"l\"> Nel comando &#171;.timer&#187; \u00e8 stata aggiunta la supporto per il valore &#171;once&#187; per applicare il timer solo alla prossima espressione SQL.\n<li class=\"l\">  Nel comando &#171;.progress&#187; \u00e8 stata aggiunta l'opzione &#171;&#8212;timeout S&#187; per forzare l'interruzione dell'espressione SQL dopo il timeout.\n<li class=\"l\"> Nel comando &#171;.indexes&#187; \u00e8 stato modificato il comportamento dei modelli, che ora si applicano ai nomi degli indici e non ai nomi delle tabelle indicizzate.      <\/ul>\n<li class=\"l\"> Sono state apportate ottimizzazioni al pianificatore di query, accelerando le operazioni di unione delle tabelle e le operazioni EXCEPT, INTERSECT e UNION.\n<li class=\"l\"> Migliorata la performance delle funzioni di conversione dei numeri in virgola mobile in rappresentazione testuale.\n<li class=\"l\"> Nell'implementazione compilata in codice intermedio WebAssembly \u00e8 stato aggiunto VFS &#171;opfs-wl&#187;, identico a VFS &#171;opfs&#187;, ma utilizza API Web Locks per gestire i blocchi.\n<li class=\"l\"> Nell'utilit\u00e0 sqlite3_rsync \u00e8 stata aggiunta l'opzione &#171;-p|&#8212;port&#187;.\n<li class=\"l\"> \u00c8 stata interrotta la supporto per la piattaforma Windows RT.        <\/ul>\n<p>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=65182\">opennet.ru<\/a> 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