{"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\/ro\/blog\/news\/vypusk-subd-sqlite-3-45","title":{"rendered":"Lansarea SGBD SQLite 3.45","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>A fost publicat versiunea SQLite 3.45, un SGBD u\u0219or, prezentat ca o bibliotec\u0103 de conectare. Codul SQLite este distribuit ca domeniu public, adic\u0103 poate fi folosit f\u0103r\u0103 restric\u021bii \u0219i gratuit \u00een orice scop. Sprijinul financiar pentru dezvoltatorii SQLite este asigurat de un consor\u021biu special creat, care include companii precum Bentley, Bloomberg, Expensify \u0219i Navigation Data Standard.    <\/p>\n<p>Modific\u0103ri principale:  <\/p>\n<ul>\n<li class=\"l\"> Toate func\u021biile SQL pentru lucrul cu formatul JSON au fost rescrise \u0219i traduse \u00een noul format intern de arbore de analiz\u0103 JSONB, care este serializat \u0219i poate fi stocat \u00een Baz\u0103 de Date pentru a exclude analiza repetat\u0103 a valorilor JSON. Noile versiuni ale func\u021biilor care genereaz\u0103 JSON genereaz\u0103 acum formatul binar JSONB \u00een loc de text. Func\u021biei json_valid() i-a fost ad\u0103ugat un al doilea argument op\u021bional, prin care poate fi specificat\u0103 o masc\u0103 de bi\u021bi care define\u0219te caracteristicile unui JSON valid (de exemplu, cu 0x04 va fi considerat valid un blob JSONB, cu 0x01 un JSON text \u00een format RFC-8259, iar cu 0x05 ambele variante).\n<li class=\"l\"> \u00cen tabela virtual\u0103 FTS5, utilizat\u0103 pentru c\u0103utarea textului complet, a fost ad\u0103ugat\u0103 op\u021biunea tokendata, care permite utilizarea tokenizerelor proprii.\n<li class=\"l\"> Impresia implicit\u0103 activeaz\u0103 optimizarea SQLITE_DIRECT_OVERFLOW_READ, prin care paginile overflow, a c\u0103ror dimensiune dep\u0103\u0219e\u0219te dimensiunea standard a paginii b-tree, sunt citite direct din fi\u0219ier, ocolind cache-ul. Pentru a dezactiva aceast\u0103 op\u021biune la compilare, se poate utiliza varianta '-DSQLITE_DIRECT_OVERFLOW_READ=0'.\n<li class=\"l\"> \u00cen planificatorul de interog\u0103ri a fost crescut\u0103 eficien\u021ba optimiz\u0103rii constr\u00e2ngerilor transitive \u0219i \u00eembun\u0103t\u0103\u021bit\u0103 ignorarea indexurilor care sunt considerate de calitate sc\u0103zut\u0103 \u00een timpul opera\u021biei ANALYZE.\n<li class=\"l\"> \u00cen interfa\u021ba liniei de comand\u0103, a fost \u00eembun\u0103t\u0103\u021bit\u0103 afi\u0219area con\u021binutului \u00een codificarea UTF-8 pe platforma Windows. S-a asigurat detectarea automat\u0103 a utiliz\u0103rii interfe\u021bei CLI la reproducerea scripturilor '.dump' \u0219i modificarea corespunz\u0103toare a set\u0103rilor, cum ar fi '.dbconfig defensive off' \u0219i '.dbconfig dqs_dll on'.\n<li class=\"l\"> \u00cen func\u021biile SQL definite la nivel de aplica\u021bie a fost ad\u0103ugat proprietatea SQLITE_RESULT_SUBTYPE, care permite apelarea din func\u021bia sqlite3_result_subtype() pentru inspectarea subtipurilor argumentelor.      <\/ul>\n<p>De asemenea, merit\u0103 men\u021bionat dezvoltarea \u00een versiunile experimentale SQLite a unui nou mod de gestionare a jurnalelor de tranzac\u021bii \u2014 WAL2 ('PRAGMA journal_mode = wal2'), \u00een care sunt utilizate dou\u0103 fi\u0219iere wal ('database-wal' \u0219i 'database-wal2') \u00een loc de unul. Atunci c\u00e2nd se scriu date \u00een baza de date, noile date sunt ad\u0103ugate \u00een primul fi\u0219ier wal. Dac\u0103 primul fi\u0219ier wal ajunge la o dimensiune suficient de mare, se comut\u0103 la scrierea \u00een al doilea fi\u0219ier. Dup\u0103 comutarea pe al doilea fi\u0219ier wal, primul devine disponibil pentru finalizarea modific\u0103rilor (checkpoint) \u0219i scrierea din nou. Prin urmare, atunci c\u00e2nd al doilea fi\u0219ier wal ajunge la o dimensiune mare, se comut\u0103 \u00eenapoi la primul, \u0219i a\u0219a mai departe, ceea ce rezolv\u0103 problema extinderii necontrolate a fi\u0219ierului wal \u00een situa\u021biile \u00een care tranzac\u021bia nu este finalizat\u0103 pentru o vreme lung\u0103 sau se desf\u0103\u0219oar\u0103 procese de citire extinse.<br \/>\n<br \/>Sursa: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=60460\">opennet.ro<\/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 5.0.2.1 - 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