{"id":8634,"date":"2025-02-14T06:02:43","date_gmt":"2025-02-14T06:02:43","guid":{"rendered":"https:\/\/howtogeek.blog\/cs\/?p=8634"},"modified":"2025-02-14T06:02:43","modified_gmt":"2025-02-14T06:02:43","slug":"how-to-resolve-mysql-fatal-error-5-effective-solutions","status":"publish","type":"post","link":"https:\/\/howtogeek.blog\/cs\/how-to-resolve-mysql-fatal-error-5-effective-solutions\/","title":{"rendered":"Jak vy\u0159e\u0161it z\u00e1va\u017enou chybu MySQL: 5 \u00fa\u010dinn\u00fdch \u0159e\u0161en\u00ed"},"content":{"rendered":"<p>Setk\u00e1n\u00ed se z\u00e1va\u017enou chybou MySQL m\u016f\u017ee b\u00fdt pro v\u00fdvoj\u00e1\u0159e skli\u010duj\u00edc\u00ed, proto\u017ee tento probl\u00e9m \u010dasto br\u00e1n\u00ed spr\u00e1vn\u00e9mu p\u0159\u00edstupu k datab\u00e1zi. Na\u0161t\u011bst\u00ed jsme vytvo\u0159ili \u0159adu jednoduch\u00fdch \u0159e\u0161en\u00ed, kter\u00e1 v\u00e1m pomohou tyto chyby efektivn\u011b vy\u0159e\u0161it.<\/p>\n<h2 id=\"h-how-do-i-fix-a-fatal-error-in-mysql\">Jak opravit z\u00e1va\u017enou chybu v MySQL<\/h2>\n<p>Ne\u017e se pust\u00edte do pokro\u010dil\u00e9ho \u0159e\u0161en\u00ed probl\u00e9m\u016f, je d\u016fle\u017eit\u00e9 ov\u011b\u0159it p\u0159ipojen\u00ed k datab\u00e1zi. Pro m\u00edstn\u00ed nastaven\u00ed zva\u017ete pou\u017eit\u00ed <code>127.0.0.1<\/code>nam\u00edsto <code>localhost<\/code>.<\/p>\n<h3 id=\"h-1-check-your-code\">1. D\u016fkladn\u011b zkontrolujte sv\u016fj k\u00f3d<\/h3>\n<ul>\n<li>Nepou\u017e\u00edvejte uvozovky v \u0159et\u011bzc\u00edch n\u00e1zvu souboru. M\u00edsto <code><strong>general_log_file=\"A.log\"<\/strong><\/code>, pou\u017eijte <code><strong>general_log_file=.\/general.log<\/strong><\/code>pro spr\u00e1vnou syntaxi.<\/li>\n<li>Zkontrolujte konzistentn\u00ed pou\u017e\u00edv\u00e1n\u00ed uvozovek. M\u00edch\u00e1n\u00ed jednoduch\u00fdch uvozovek s dvojit\u00fdmi uvozovkami a apostrofy m\u016f\u017ee v\u00e9st k neo\u010dek\u00e1van\u00fdm chyb\u00e1m.<\/li>\n<li>P\u0159ed dal\u0161\u00edm testov\u00e1n\u00edm p\u0159ipojen\u00ed nezapome\u0148te ulo\u017eit v\u0161echny zm\u011bny proveden\u00e9 ve va\u0161em k\u00f3du.<\/li>\n<\/ul>\n<h3 id=\"h-2-try-upgrading-mysql\">2. Upgradujte svou verzi MySQL<\/h3>\n<ul>\n<li>Otev\u0159ete na sv\u00e9m po\u010d\u00edta\u010di aplikaci Terminal.<\/li>\n<li>Prove\u010fte p\u0159\u00edkaz: <code><strong>\/etc\/init.d\/mysqld start --skip-grant-tables &amp;&amp; mysql_upgrade<\/strong><\/code> <img alt=\"upgrade mysql\" class=\"wp-image\" decoding=\"async\" height=\"244\" loading=\"lazy\" src=\"https:\/\/cdn.howtogeek.blog\/wp-content\/uploads\/2025\/02\/mysql-upgrade.webp\" title=\"upgrade mysql\" width=\"690\"\/> <\/li>\n<li>Po dokon\u010den\u00ed upgradu restartujte slu\u017ebu MySQL pomoc\u00ed: <code><strong>\/etc\/init.d\/mysqld restart<\/strong><\/code> <img alt=\"\" class=\"wp-image\" decoding=\"async\" height=\"168\" loading=\"lazy\" src=\"https:\/\/cdn.howtogeek.blog\/wp-content\/uploads\/2025\/02\/mysqld-restart.webp\" title=\"\" width=\"533\"\/> <\/li>\n<\/ul>\n<p>Tento proces je zvl\u00e1\u0161t\u011b \u00fa\u010dinn\u00fd, kdy\u017e naraz\u00edte na fat\u00e1ln\u00ed chybu indikuj\u00edc\u00ed, \u017ee <code>mysql.user<\/code>tabulka je po\u0161kozena, obvykle kv\u016fli tomu, \u017ee m\u00e1te na sv\u00e9m za\u0159\u00edzen\u00ed nainstalov\u00e1no v\u00edce verz\u00ed MySQL.<\/p>\n<h3 id=\"h-3-increase-the-timeouts\">3. Zvy\u0161te \u010dasov\u00e9 limity p\u0159\u00edkaz\u016f<\/h3>\n<ul>\n<li>Otev\u0159ete sv\u016fj programovac\u00ed k\u00f3d, kde je nav\u00e1z\u00e1no p\u0159ipojen\u00ed k datab\u00e1zi.<\/li>\n<li>Chcete-li prodlou\u017eit dobu trv\u00e1n\u00ed \u010dasov\u00e9ho limitu p\u0159\u00edkazu, p\u0159idejte n\u00e1sleduj\u00edc\u00ed \u0159\u00e1dek: <code><strong>cmd. CommandTimeout = 86400<\/strong><\/code> <img alt=\"\u010dasov\u00fd limit p\u0159\u00edkazu\" class=\"wp-image\" decoding=\"async\" height=\"123\" loading=\"lazy\" src=\"https:\/\/cdn.howtogeek.blog\/wp-content\/uploads\/2025\/02\/command-timeout.webp\" title=\"\u010dasov\u00fd limit p\u0159\u00edkazu\" width=\"484\"\/> <\/li>\n<li>Zva\u017ete vytvo\u0159en\u00ed index\u016f pro urychlen\u00ed procesu JOIN pomoc\u00ed syntaxe, jako je tato: <code><strong>CREATE INDEX bilan_siren ON bilan(siren); CREATE INDEX data_siren ON data(siren);<\/strong><\/code> <img alt=\"\" class=\"wp-image\" decoding=\"async\" height=\"201\" loading=\"lazy\" src=\"https:\/\/cdn.howtogeek.blog\/wp-content\/uploads\/2025\/02\/create-index-code.webp\" title=\"\" width=\"601\"\/> <\/li>\n<li>Po implementaci t\u011bchto zm\u011bn ulo\u017ete k\u00f3d a znovu otestujte p\u0159ipojen\u00ed, abyste zjistili, zda probl\u00e9m p\u0159etrv\u00e1v\u00e1.<\/li>\n<\/ul>\n<h3 id=\"h-4-add-timeouts-if-not-added\">4. Implementujte \u010dasov\u00e9 limity p\u0159ipojen\u00ed<\/h3>\n<ul>\n<li>Vra\u0165te se ke sv\u00e9mu k\u00f3du a ujist\u011bte se, \u017ee \u010dasov\u00e9 limity jsou spr\u00e1vn\u011b implementov\u00e1ny.<\/li>\n<li>Vlo\u017ete nastaven\u00ed \u010dasov\u00e9ho limitu mezi hovory <code>connection. Open()<\/code>a <code>ExecuteNonQuery()<\/code>n\u00e1sledovn\u011b: <code><strong>connection. Open(); MySqlCommand cmd = new MySqlCommand(\"set net_write_timeout=99999; set net_read_timeout=99999\", connection); cmd. ExecuteNonQuery(); int numOfRecordsUpdated = command. ExecuteNonQuery();<\/strong><\/code> <img alt=\"\" class=\"wp-image\" decoding=\"async\" height=\"242\" loading=\"lazy\" src=\"https:\/\/cdn.howtogeek.blog\/wp-content\/uploads\/2025\/02\/timeout-cmd.webp\" title=\"\" width=\"867\"\/> <\/li>\n<li>Nezapome\u0148te ulo\u017eit v\u0161echny zm\u011bny!<\/li>\n<\/ul>\n<h3 id=\"h-5-use-try-catch\">5. Implementujte Try-Catch pro zpracov\u00e1n\u00ed chyb<\/h3>\n<ul>\n<li>Otev\u0159ete sv\u016fj p\u0159ipojovac\u00ed k\u00f3d MySQL.<\/li>\n<li>Zave\u010fte blok try-catch pro efektivn\u00ed spr\u00e1vu v\u00fdjimek t\u00edm, \u017ee jej zak\u00f3dujete takto: <code><strong>function dbConnect() { try { return new mysqli('localhost', 'centr120_genuser', 'Baroque73!', 'centr120_cmp'); } catch(mysqli_sql_exception) {} return new mysqli('localhost', 'pract458_genuser', 'Gunjur64!', 'pract458_cmp'); }<\/strong><\/code> <img alt=\"zkus chytit mysql\" class=\"wp-image\" decoding=\"async\" height=\"234\" loading=\"lazy\" src=\"https:\/\/cdn.howtogeek.blog\/wp-content\/uploads\/2025\/02\/try-catch-mysql.webp\" title=\"zkus chytit mysql\" width=\"822\"\/> <\/li>\n<li>Po nastaven\u00ed si pr\u00e1ci ulo\u017ete.<\/li>\n<\/ul>\n<p>Existuje cel\u00e1 \u0159ada chybov\u00fdch zpr\u00e1v MySQL Fatal, z nich\u017e ka\u017ed\u00e1 vy\u017eaduje p\u0159izp\u016fsoben\u00fd p\u0159\u00edstup zalo\u017een\u00fd na jej\u00edch specifik\u00e1ch. Obecn\u011b v\u0161ak plat\u00ed, \u017ee p\u0159ed prozkoum\u00e1n\u00edm slo\u017eit\u011bj\u0161\u00edch \u0159e\u0161en\u00ed za\u010dn\u011bte ov\u011b\u0159en\u00edm k\u00f3du a implementac\u00ed \u010dasov\u00e9ho limitu.<\/p>\n<p>Krom\u011b toho je d\u016fle\u017eit\u00e9 pravideln\u011b z\u00e1lohovat datab\u00e1zi MySQL a pokusit se opravit jakoukoli po\u0161kozenou datab\u00e1zi na serveru SQL, ne\u017e za\u010dnete \u0159e\u0161it jin\u00e9 probl\u00e9my.<\/p>\n<h2>\u010casto kladen\u00e9 ot\u00e1zky<\/h2>\n<h3><strong>1. Co zp\u016fsobuje fat\u00e1ln\u00ed chybu MySQL?<\/strong><\/h3>\n<p>Z\u00e1va\u017en\u00e1 chyba MySQL m\u016f\u017ee b\u00fdt vyvol\u00e1na r\u016fzn\u00fdmi faktory, v\u010detn\u011b nespr\u00e1vn\u00fdch parametr\u016f p\u0159ipojen\u00ed, po\u0161kozen\u00fdch datab\u00e1zov\u00fdch tabulek nebo konflikt\u016f zp\u016fsoben\u00fdch v\u00edce verzemi MySQL nainstalovan\u00fdmi na stejn\u00e9m syst\u00e9mu.<\/p>\n<h3><strong>2. Jak pozn\u00e1m konkr\u00e9tn\u00ed chybovou zpr\u00e1vu se z\u00e1va\u017enou chybou?<\/strong><\/h3>\n<p>Chcete-li ur\u010dit p\u0159esnou zpr\u00e1vu o fat\u00e1ln\u00ed chyb\u011b, pod\u00edvejte se do protokolu chyb MySQL, kter\u00fd lze obvykle nal\u00e9zt v instala\u010dn\u00edm adres\u00e1\u0159i MySQL. Anal\u00fdza protokolu poskytne p\u0159ehled o p\u0159\u00ed\u010din\u011b chyby.<\/p>\n<h3><strong>3. Mohu obnovit po\u0161kozenou datab\u00e1zi MySQL?<\/strong><\/h3>\n<p>Ano, je mo\u017en\u00e9 obnovit po\u0161kozenou datab\u00e1zi MySQL. Tento n\u00e1stroj m\u016f\u017eete pou\u017e\u00edt <code>mysqlcheck<\/code>k oprav\u011b tabulek a v\u017edy se ujist\u011bte, \u017ee m\u00e1te z\u00e1lo\u017en\u00ed kopie, ne\u017e se pokus\u00edte o jak\u00e9koli procesy obnovy.<\/p>\n<p><a class=\"xiaomi\" href=\"https:\/\/windowsreport.com\/mysql-fatal-error\/\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">Zdroj a obr\u00e1zky<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Setk\u00e1n\u00ed se z\u00e1va\u017enou chybou MySQL m\u016f\u017ee b\u00fdt pro v\u00fdvoj\u00e1\u0159e skli\u010duj\u00edc\u00ed, proto\u017ee tento probl\u00e9m \u010dasto br\u00e1n\u00ed spr\u00e1vn\u00e9mu p\u0159\u00edstupu k datab\u00e1zi. Na\u0161t\u011bst\u00ed jsme vytvo\u0159ili \u0159adu jednoduch\u00fdch \u0159e\u0161en\u00ed, kter\u00e1 v\u00e1m pomohou tyto chyby efektivn\u011b vy\u0159e\u0161it. Jak opravit z\u00e1va\u017enou chybu v MySQL Ne\u017e se pust\u00edte do pokro\u010dil\u00e9ho \u0159e\u0161en\u00ed probl\u00e9m\u016f, je d\u016fle\u017eit\u00e9 ov\u011b\u0159it p\u0159ipojen\u00ed k datab\u00e1zi. Pro m\u00edstn\u00ed nastaven\u00ed zva\u017ete [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[5],"class_list":["post-8634","post","type-post","status-publish","format-standard","hentry","category-how-to","tag-windows"],"acf":[],"_links":{"self":[{"href":"https:\/\/howtogeek.blog\/cs\/wp-json\/wp\/v2\/posts\/8634","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/howtogeek.blog\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/howtogeek.blog\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/howtogeek.blog\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/howtogeek.blog\/cs\/wp-json\/wp\/v2\/comments?post=8634"}],"version-history":[{"count":1,"href":"https:\/\/howtogeek.blog\/cs\/wp-json\/wp\/v2\/posts\/8634\/revisions"}],"predecessor-version":[{"id":8635,"href":"https:\/\/howtogeek.blog\/cs\/wp-json\/wp\/v2\/posts\/8634\/revisions\/8635"}],"wp:attachment":[{"href":"https:\/\/howtogeek.blog\/cs\/wp-json\/wp\/v2\/media?parent=8634"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/howtogeek.blog\/cs\/wp-json\/wp\/v2\/categories?post=8634"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/howtogeek.blog\/cs\/wp-json\/wp\/v2\/tags?post=8634"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}