{"id":105659,"date":"2022-11-21T15:36:52","date_gmt":"2022-11-21T13:36:52","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-subd-sqlite-3-40"},"modified":"2022-11-21T15:36:52","modified_gmt":"2022-11-21T13:36:52","slug":"vypusk-subd-sqlite-3-40","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/vypusk-subd-sqlite-3-40","title":{"rendered":"Wydanie DBMS SQLite 3.40","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Opublikowano wersj\u0119 SQLite 3.40, lekkiej bazy danych, kt\u00f3ra jest dostarczana jako biblioteka do zainstalowania. Kod SQLite jest rozpowszechniany na zasadzie public domain, co oznacza, \u017ce mo\u017ce by\u0107 u\u017cywany bez ogranicze\u0144 i bezp\u0142atnie w dowolnych celach. Finansowe wsparcie dla programist\u00f3w SQLite zapewnia specjalnie utworzony konsorcjum, do kt\u00f3rego nale\u017c\u0105 takie firmy jak Adobe, Oracle, Mozilla, Bentley i Bloomberg.     <\/p>\n<p>G\u0142\u00f3wne zmiany:  <\/p>\n<ul>\n<li class=\"l\"> Zrealizowano eksperymentaln\u0105 funkcj\u0119 kompilacji SQLite do po\u015bredniego kodu WebAssembly, zdolnego do uruchamiania w przegl\u0105darkach internetowych i odpowiedniego do zarz\u0105dzania baz\u0105 danych z aplikacji webowych w j\u0119zyku JavaScript. Web-deweloperzy otrzymuj\u0105 wyspecjalizowany obiektowy interfejs do pracy z danymi w stylu sql.js lub Node.js, opakowanie nad niskopoziomowym C API oraz API oparte na mechanizmie Web Worker, kt\u00f3ry pozwala na tworzenie asynchronicznych handler\u00f3w wykonywanych w oddzielnych w\u0105tkach. Dane, kt\u00f3re aplikacje webowe przechowuj\u0105 w wersji WASM SQLite, mog\u0105 by\u0107 zapisane po stronie klienta za pomoc\u0105 OPFS (Origin-Private FileSystem) lub API window.localStorage.\n<li class=\"l\"> Dodano rozszerzenie recovery, kt\u00f3re ma na celu odzyskiwanie danych z uszkodzonych plik\u00f3w bazy danych. W interfejsie wiersza polece\u0144 do odzyskiwania u\u017cywana jest komenda &#171;.recover&#187;.\n<li class=\"l\"> Udoskonalono dzia\u0142anie planisty zapyta\u0144. Usuni\u0119to ograniczenia przy u\u017cywaniu indeks\u00f3w z tabelami maj\u0105cymi wi\u0119cej ni\u017c 63 kolumny (wcze\u015bniej podczas operacji na kolumnach, kt\u00f3rych numer przekracza\u0142 63, indeksowanie nie by\u0142o stosowane). Ulepszono indeksowanie warto\u015bci u\u017cywanych w wyra\u017ceniach. Zaniechano \u0142adowania z dysku du\u017cych wierszy i blob\u00f3w podczas przetwarzania operator\u00f3w NOT NULL i IS NULL. Wyeliminowano materializacj\u0119 widok\u00f3w, dla kt\u00f3rych pe\u0142ne skanowanie odbywa si\u0119 tylko raz.\n<li class=\"l\"> W bazie kodu zamiast typu &#171;char *&#187; do reprezentacji nazw plik\u00f3w u\u017cywany jest osobny typ sqlite3_filename.\n<li class=\"l\"> Dodano wewn\u0119trzn\u0105 funkcj\u0119 sqlite3_value_encoding().\n<li class=\"l\"> Dodano tryb SQLITE_DBCONFIG_DEFENSIVE, zabraniaj\u0105cy zmiany wersji schematu przechowywania danych.\n<li class=\"l\"> W implementacji parametru &#171;PRAGMA integrity_check&#187; dodano dodatkowe kontrole. Na przyk\u0142ad, tabele bez flagi STRICT nie powinny zawiera\u0107 warto\u015bci numerycznych w kolumnach typu TEXT oraz warto\u015bci tekstowych z liczbami w kolumnach typu NUMERIC. Dodano r\u00f3wnie\u017c kontrol\u0119 poprawno\u015bci kolejno\u015bci wierszy w tabelach z flag\u0105 &#171;WITHOUT ROWID&#187;.\n<li class=\"l\"> W wyra\u017ceniu &#171;VACUUM INTO&#187; uwzgl\u0119dniono ustawienia &#171;PRAGMA synchronous&#187;.\n<li class=\"l\"> Dodano opcj\u0119 kompilacji SQLITE_MAX_ALLOCATION_SIZE, kt\u00f3ra pozwala ograniczy\u0107 rozmiar blok\u00f3w przy alokacji pami\u0119ci.\n<li class=\"l\"> Wbudowany w SQLite algorytm generowania liczb pseudolosowych zosta\u0142 przet\u0142umaczony z u\u017cycia szyfru strumieniowego RC4 na Chacha20.\n<li class=\"l\"> Zezwolono na u\u017cycie w r\u00f3\u017cnych schematach danych indeks\u00f3w o tych samych nazwach.\n<li class=\"l\"> Wprowadzono optymalizacje wydajno\u015bci, kt\u00f3re pozwoli\u0142y zmniejszy\u0107 obci\u0105\u017cenie CPU o oko\u0142o 1% przy typowej aktywno\u015bci.      <\/ul>\n<p>\u0179r\u00f3d\u0142o: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=58162\">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 3.40, \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 Adobe, Oracle, Mozilla, Bentley \u0438 Bloomberg. \u041e\u0441\u043d\u043e\u0432\u043d\u044b\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f: \u0420\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u0430 \u044d\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442\u0430\u043b\u044c\u043d\u0430\u044f \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0446\u0438\u0438 [&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-105659","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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