{"id":164600,"date":"2026-03-14T11:12:15","date_gmt":"2026-03-14T09:12:15","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/sqlite-3-51-3-s-ispravleniem-vozmozhnogo-povrezhdeniya-bazy-dannyh-v-rezhime-wal"},"modified":"2026-03-14T11:12:15","modified_gmt":"2026-03-14T09:12:15","slug":"sqlite-3-51-3-s-ispravleniem-vozmozhnogo-povrezhdeniya-bazy-dannyh-v-rezhime-wal","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/sqlite-3-51-3-s-ispravleniem-vozmozhnogo-povrezhdeniya-bazy-dannyh-v-rezhime-wal","title":{"rendered":"SQLite 3.51.3 com corre\u00e7\u00e3o de poss\u00edvel corrup\u00e7\u00e3o de banco de dados no modo WAL","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"SQLite 3.51.3 com corre\u00e7\u00e3o de poss\u00edvel corrup\u00e7\u00e3o de banco de dados no modo WAL\" src=\"\/wp-content\/uploads\/2026\/03\/3c442654f8b6d86974735255e8214cfe.jpg\" style=\"display:block;margin: 0 auto;\" \/>                              <noindex>      <noindex><\/p>\n<p>No dia 13 de mar\u00e7o, foi lan\u00e7ado um update corretivo 3.51.3 para o SGBD embutido compacto. <a rel=\"nofollow\" href=\"https:\/\/sqlite.org\">SQLite<\/a>O c\u00f3digo do projeto foi escrito na linguagem C e distribu\u00eddo como dom\u00ednio p\u00fablico.<\/p>\n<p><\/noindex><\/noindex> <noindex><\/p>\n<p>Devido a problemas de compatibilidade reversa ligados a algumas novas funcionalidades, a vers\u00e3o <a rel=\"nofollow\" href=\"https:\/\/sqlite.org\/releaselog\/3_52_0.html\">3.52.0<\/a> (lan\u00e7ada em 6 de mar\u00e7o) foi retirada.<\/p>\n<p><\/noindex>  <\/p>\n<p>Lista de mudan\u00e7as da vers\u00e3o 3.51.3:<\/p>\n<ul>\n<li>Em 3 de mar\u00e7o, um dos desenvolvedores do SQLite (Dan) descobriu e corrigiu um erro que, em raras ocasi\u00f5es, poderia causar a corrup\u00e7\u00e3o do banco de dados, chamado <a rel=\"nofollow\" href=\"https:\/\/sqlite.org\/wal.html#walresetbug\">\u00abWAL-reset bug\u00bb<\/a>:\n<ul>\n<li>Esse erro ocorre apenas em bancos de dados operando no modo WAL, se dois ou mais processos ou threads tentarem acessar o mesmo arquivo simultaneamente para escrita ou cria\u00e7\u00e3o de checkpoints.<\/li>\n<li>O erro est\u00e1 relacionado a um conflito de acesso a dados sob r\u00edgidas restri\u00e7\u00f5es de tempo. Em condi\u00e7\u00f5es normais de opera\u00e7\u00e3o, ele \u00e9 extremamente raro. Os desenvolvedores n\u00e3o conseguiram reproduzir esse erro em condi\u00e7\u00f5es reais e tiveram que adicionar a l\u00f3gica de teste especial ao SQLite, que intencionalmente cria condi\u00e7\u00f5es para provocar o erro, a fim de garantir que o problema foi resolvido.<\/li>\n<li>O erro ocorre quando:\n<ol>\n<li>Uma conex\u00e3o realiza a verifica\u00e7\u00e3o do checkpoint. Essa primeira verifica\u00e7\u00e3o deve ser conclu\u00edda. Em outras palavras, durante a verifica\u00e7\u00e3o, \u00e9 necess\u00e1rio copiar com sucesso todo o conte\u00fado do arquivo WAL de volta para o banco de dados e colocar o arquivo WAL em um estado que permita um reset.<\/li>\n<li>Imediatamente ap\u00f3s a conclus\u00e3o do primeiro checkpoint, o segundo \u00e9 iniciado.<\/li>\n<li>Enquanto o segundo checkpoint do passo 2 est\u00e1 sendo iniciado, outra conex\u00e3o ao banco de dados registra uma transa\u00e7\u00e3o que reseta o arquivo WAL e grava novo conte\u00fado no in\u00edcio do arquivo WAL.<\/li>\n<li>Devido ao conflito de acesso a dados, o segundo checkpoint do passo 2 n\u00e3o considera que o arquivo WAL foi resetado em decorr\u00eancia da conclus\u00e3o da transa\u00e7\u00e3o no passo 3. O segundo checkpoint estabelece um valor incorreto para um dos campos no cabe\u00e7alho do WAL. Esse campo indica que parte do arquivo WAL j\u00e1 foi confirmada no checkpoint, embora isso n\u00e3o seja verdade.<\/li>\n<li>A fixa\u00e7\u00e3o de transa\u00e7\u00f5es adicionais leva ao aumento do n\u00famero de p\u00e1ginas no arquivo WAL, que excede o n\u00famero de p\u00e1ginas existentes no momento do primeiro ponto de verifica\u00e7\u00e3o da etapa 1.<\/li>\n<li>Mais tarde, quando um terceiro ponto de verifica\u00e7\u00e3o ocorre, ele ignora toda ou parte da transa\u00e7\u00e3o registrada na etapa 3. Assim, partes da transa\u00e7\u00e3o da etapa 3 n\u00e3o entram no arquivo do banco de dados, resultando em corrup\u00e7\u00e3o do arquivo do banco de dados.<\/li>\n<\/ol>\n<\/li>\n<li>O erro provavelmente est\u00e1 presente em todas as vers\u00f5es do SQLite, come\u00e7ando pela 3.7.0 (21.07.2010) e indo at\u00e9 a 3.51.2. Tamb\u00e9m foram lan\u00e7adas corre\u00e7\u00f5es para algumas vers\u00f5es anteriores: <a rel=\"nofollow\" href=\"https:\/\/sqlite.org\/src\/info\/863c171b76cd36e0\">3.44.6<\/a> e <a rel=\"nofollow\" href=\"https:\/\/sqlite.org\/src\/info\/c7facf7ac58d2cda\">3.50.7<\/a>.<\/li>\n<\/ul>\n<\/li>\n<li>Outras corre\u00e7\u00f5es menores.<\/li>\n<\/ul>\n<p>Fonte: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.linux.org.ru\/news\/opensource\/18241537\">linux.org.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>13-\u0433\u043e \u043c\u0430\u0440\u0442\u0430 \u0441\u043e\u0441\u0442\u043e\u044f\u043b\u0441\u044f \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0439 \u0432\u044b\u043f\u0443\u0441\u043a 3.51.3 \u043a\u043e\u043c\u043f\u0430\u043a\u0442\u043d\u043e\u0439 \u0432\u0441\u0442\u0440\u0430\u0438\u0432\u0430\u0435\u043c\u043e\u0439 \u0421\u0423\u0411\u0414 SQLite. \u041a\u043e\u0434 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 C \u0438 \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). \u0412 \u0441\u0432\u044f\u0437\u0438 \u0441 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430\u043c\u0438 \u043e\u0431\u0440\u0430\u0442\u043d\u043e\u0439 \u0441\u043e\u0432\u043c\u0435\u0441\u0442\u0438\u043c\u043e\u0441\u0442\u0438, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u043c\u0438 \u0441 \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u043c\u0438 \u043d\u043e\u0432\u044b\u043c\u0438 \u0444\u0443\u043d\u043a\u0446\u0438\u044f\u043c\u0438, \u0432\u0435\u0440\u0441\u0438\u044f 3.52.0 (\u0432\u044b\u0448\u0435\u0434\u0448\u0430\u044f 6-\u0433\u043e \u043c\u0430\u0440\u0442\u0430) \u0431\u044b\u043b\u0430 \u043e\u0442\u043e\u0437\u0432\u0430\u043d\u0430. \u0421\u043f\u0438\u0441\u043e\u043a \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0439 \u0432\u0435\u0440\u0441\u0438\u0438 3.51.3: 3-\u0433\u043e \u043c\u0430\u0440\u0442\u0430 \u043e\u0434\u0438\u043d \u0438\u0437 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432 SQLite (Dan) \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0438\u043b \u0438 \u0443\u0441\u0442\u0440\u0430\u043d\u0438\u043b [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":8,"featured_media":164601,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-164600","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 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