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<b>Warning</b>:  imagewebp(/home/www/qunhe.com/wp-content/uploads/2026/10/qunhe-wp500-20261025/296-wp-guide-296-alter-lock-risk-cover-300x300.webp): Failed to open stream: Permission denied in <b>/home/www/qunhe.com/wp-includes/class-wp-image-editor.php</b> on line <b>577</b><br />
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<b>Warning</b>:  imagewebp(/home/www/qunhe.com/wp-content/uploads/2026/10/qunhe-wp500-20261025/296-wp-guide-296-alter-lock-risk-cover-100x100.webp): Failed to open stream: Permission denied in <b>/home/www/qunhe.com/wp-includes/class-wp-image-editor.php</b> on line <b>577</b><br />
{"id":5900,"date":"2026-10-25T18:35:10","date_gmt":"2026-10-25T10:35:10","guid":{"rendered":"https:\/\/www.qunhe.com\/?p=5900"},"modified":"2026-10-25T18:35:10","modified_gmt":"2026-10-25T10:35:10","slug":"wp-guide-296-alter-lock-risk","status":"publish","type":"post","link":"https:\/\/www.qunhe.com\/en\/wp-guide-296-alter-lock-risk\/","title":{"rendered":"\u7ed9\u5927\u8868\u52a0\u5b57\u6bb5\u6216\u7d22\u5f15\u80fd\u4fdd\u8bc1\u4e0d\u505c\u7ad9\u5417\uff1fALTER\u7684\u7b97\u6cd5\u548c\u5143\u6570\u636e\u9501\u8981\u5206\u5f00"},"content":{"rendered":"<div class=\"wp-block-group qh-wp500-article is-layout-flow wp-block-group-is-layout-flow\"><figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.qunhe.com\/wp-content\/uploads\/2026\/10\/qunhe-wp500-20261025\/296-wp-guide-296-alter-lock-risk-cover.webp\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/www.qunhe.com\/wp-content\/uploads\/2026\/10\/qunhe-wp500-20261025\/296-wp-guide-296-alter-lock-risk-cover.webp\" alt=\"\u6570\u636e\u5e93\u7ed3\u6784\u53d8\u66f4\u7684\u9501\u98ce\u9669\uff1aDDL\u7b97\u6cd5\uff0c\u51b3\u5b9a\u90e8\u5206\u6267\u884c\u65b9\u5f0f\uff0c\u6709\u7248\u672c\u548c\u64cd\u4f5c\u6761\u4ef6\uff1b\u5143\u6570\u636e\u9501\uff0c\u4fdd\u62a4\u7ed3\u6784\u8bbf\u95ee\u5173\u7cfb\uff0c\u5728\u7ebf\u64cd\u4f5c\u4e5f\u9700\u8003\u8651\uff1b\u53d8\u66f4\u5b8c\u6210\uff0c\u7ed3\u6784\u4e0e\u4e1a\u52a1\u5747\u6b63\u786e\uff0c\u4e0d\u53ea\u662f\u8bed\u53e5\u8fd4\u56de\u6210\u529f\" width=\"1200\" height=\"800\"\/><\/a><figcaption class=\"wp-element-caption\">\u6570\u636e\u5e93\u7ed3\u6784\u53d8\u66f4\u7684\u9501\u98ce\u9669\uff1a\u5173\u952e\u6982\u5ff5\u4e0e\u8fb9\u754c\u5bf9\u7167\u3002\u539f\u521b\u77e5\u8bc6\u793a\u610f\uff0c\u70b9\u51fb\u53ef\u67e5\u770b\u5927\u56fe\u3002<\/figcaption><\/figure><p 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class=\"wp-block-paragraph\">\u65b0\u589e\u5217\u3001\u6539\u7c7b\u578b\u3001\u5efa\u7d22\u5f15\u548c\u6539\u53d8\u5b57\u7b26\u96c6\u7684\u6210\u672c\u53ef\u80fd\u5b8c\u5168\u4e0d\u540c\u3002\u8bb0\u5f55\u8868\u5927\u5c0f\u3001\u5f15\u64ce\u3001\u6570\u636e\u5e93\u7248\u672c\u53ca\u4e1a\u52a1\u8bfb\u5199\uff0c\u4e0d\u80fd\u53ea\u8bf4\u201c\u6539\u4e00\u4e0b\u8868\u7ed3\u6784\u201d\u3002\u63d2\u4ef6\u5347\u7ea7\u81ea\u52a8\u6267\u884c\u7684DDL\u4e5f\u8981\u7eb3\u5165\u7ef4\u62a4\u8ba1\u5212\uff0c\u5c24\u5176\u662f\u8ba2\u5355\u3001\u4efb\u52a1\u548c\u6301\u7eed\u5199\u5165\u7684\u6570\u636e\u8868\u3002<\/p><h2 class=\"wp-block-heading\">\u67e5\u8be2\u5f53\u524d\u7248\u672c\u652f\u6301\u7684\u7b97\u6cd5<\/h2><p class=\"wp-block-paragraph\">\u6309\u5b98\u65b9\u6587\u6863\u6838\u5bf9\u8be5\u64cd\u4f5c\u53ef\u7528\u7b97\u6cd5\u3001\u662f\u5426\u91cd\u5efa\u8868\u53ca\u5e76\u53d1\u9650\u5236\uff0cMySQL\u4e0eMariaDB\u4e0d\u80fd\u6df7\u5957\u3002\u663e\u5f0f\u8981\u6c42\u67d0\u7b97\u6cd5\u5728\u4e0d\u652f\u6301\u65f6\u53ef\u80fd\u5931\u8d25\uff0c\u81ea\u52a8\u9009\u62e9\u5219\u9700\u7406\u89e3\u5176\u5b9e\u9645\u884c\u4e3a\u3002\u4e0d\u8981\u5c06\u6d4b\u8bd5\u5c0f\u8868\u77ac\u95f4\u5b8c\u6210\uff0c\u63a8\u65ad\u6b63\u5f0f\u5927\u8868\u4e5f\u6709\u76f8\u540c\u8017\u65f6\u548c\u7a7a\u95f4\u9700\u6c42\u3002<\/p><figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.qunhe.com\/wp-content\/uploads\/2026\/10\/qunhe-wp500-20261025\/296-wp-guide-296-alter-lock-risk-flow.webp\"><img decoding=\"async\" src=\"https:\/\/www.qunhe.com\/wp-content\/uploads\/2026\/10\/qunhe-wp500-20261025\/296-wp-guide-296-alter-lock-risk-flow.webp\" alt=\"\u6570\u636e\u5e93\u7ed3\u6784\u53d8\u66f4\u7684\u9501\u98ce\u9669\uff1a\u660e\u786e\u53d8\u66f4\u7c7b\u578b\u3001\u6838\u5bf9\u7b97\u6cd5\u6761\u4ef6\u3001\u89c2\u5bdf\u9501\u4e0e\u8d44\u6e90\u3001\u526f\u672c\u6f14\u7ec3\u540e\u6267\u884c\" width=\"1200\" height=\"800\"\/><\/a><figcaption class=\"wp-element-caption\">\u6392\u67e5\u6d41\u7a0b\uff1a\u660e\u786e\u53d8\u66f4\u7c7b\u578b \u2192 \u6838\u5bf9\u7b97\u6cd5\u6761\u4ef6 \u2192 \u89c2\u5bdf\u9501\u4e0e\u8d44\u6e90 \u2192 \u526f\u672c\u6f14\u7ec3\u540e\u6267\u884c\u3002\u539f\u521b\u77e5\u8bc6\u793a\u610f\uff0c\u70b9\u51fb\u53ef\u67e5\u770b\u5927\u56fe\u3002<\/figcaption><\/figure><h2 class=\"wp-block-heading\">\u68c0\u67e5\u5143\u6570\u636e\u9501\u548c\u957f\u4e8b\u52a1<\/h2><p class=\"wp-block-paragraph\">DDL\u53ef\u80fd\u7b49\u5f85\u5df2\u6709\u4e8b\u52a1\u91ca\u653e\u76f8\u5173\u5143\u6570\u636e\u9501\uff0c\u6392\u961f\u4e5f\u53ef\u80fd\u5f71\u54cd\u540e\u7eed\u8bf7\u6c42\u3002\u5148\u89c2\u5bdf\u957f\u4e8b\u52a1\u548c\u4e1a\u52a1\u9ad8\u5cf0\uff0c\u5b89\u6392\u5408\u9002\u7a97\u53e3\u4e0e\u76d1\u63a7\uff0c\u4e0d\u80fd\u89c1\u5230\u7b49\u5f85\u5c31\u76f4\u63a5\u7ec8\u6b62\u6240\u6709\u8fde\u63a5\u3002\u7a7a\u95f4\u3001\u65e5\u5fd7\u53ca\u590d\u5236\u7b49\u8d44\u6e90\u5f71\u54cd\u4e5f\u5e94\u8bb0\u5f55\uff0c\u4e0d\u628a\u5728\u7ebf\u5904\u7406\u8bef\u89e3\u6210\u5b8c\u5168\u514d\u8d39\u3002<\/p><h2 class=\"wp-block-heading\">\u5728\u526f\u672c\u9a8c\u8bc1\u5e76\u51c6\u5907\u5931\u8d25\u8def\u5f84<\/h2><p class=\"wp-block-paragraph\">\u590d\u5236\u4ee3\u8868\u6027\u7ed3\u6784\u4e0e\u6570\u636e\uff0c\u5728\u53d7\u63a7\u73af\u5883\u6d4b\u91cf\u53d8\u66f4\u548c\u56de\u5f52\uff0c\u786e\u8ba4\u5931\u8d25\u3001\u53d6\u6d88\u6216\u56de\u9000\u7684\u5b9e\u9645\u65b9\u5f0f\u3002\u5907\u4efd\u5b58\u5728\u4e0d\u7b49\u4e8e\u53ef\u4ee5\u5feb\u901f\u65e0\u635f\u9006\u8f6c\u4efb\u4f55DDL\u3002\u6b63\u5f0f\u6267\u884c\u540e\u68c0\u67e5\u7ed3\u6784\u3001\u5173\u952e\u67e5\u8be2\u4e0e\u5199\u5165\uff0c\u8bb0\u5f55\u7ef4\u62a4\u8fb9\u754c\uff0c\u4e0d\u7528SQL\u6210\u529f\u7ed3\u675f\u4ee3\u66ff\u7f51\u7ad9\u4e1a\u52a1\u9a8c\u6536\u3002<\/p><h2 class=\"wp-block-heading\">\u5173\u952e\u533a\u522b<\/h2><figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.qunhe.com\/wp-content\/uploads\/2026\/10\/qunhe-wp500-20261025\/296-wp-guide-296-alter-lock-risk-compare.webp\"><img decoding=\"async\" src=\"https:\/\/www.qunhe.com\/wp-content\/uploads\/2026\/10\/qunhe-wp500-20261025\/296-wp-guide-296-alter-lock-risk-compare.webp\" alt=\"\u6570\u636e\u5e93\u7ed3\u6784\u53d8\u66f4\u7684\u9501\u98ce\u9669\uff1aDDL\u7b97\u6cd5\uff0c\u51b3\u5b9a\u90e8\u5206\u6267\u884c\u65b9\u5f0f\uff0c\u6709\u7248\u672c\u548c\u64cd\u4f5c\u6761\u4ef6\uff1b\u5143\u6570\u636e\u9501\uff0c\u4fdd\u62a4\u7ed3\u6784\u8bbf\u95ee\u5173\u7cfb\uff0c\u5728\u7ebf\u64cd\u4f5c\u4e5f\u9700\u8003\u8651\uff1b\u53d8\u66f4\u5b8c\u6210\uff0c\u7ed3\u6784\u4e0e\u4e1a\u52a1\u5747\u6b63\u786e\uff0c\u4e0d\u53ea\u662f\u8bed\u53e5\u8fd4\u56de\u6210\u529f\" width=\"1200\" height=\"800\"\/><\/a><figcaption class=\"wp-element-caption\">\u6570\u636e\u5e93\u7ed3\u6784\u53d8\u66f4\u7684\u9501\u98ce\u9669\uff1a\u5173\u952e\u6982\u5ff5\u4e0e\u8fb9\u754c\u5bf9\u7167\u3002\u539f\u521b\u77e5\u8bc6\u793a\u610f\uff0c\u70b9\u51fb\u53ef\u67e5\u770b\u5927\u56fe\u3002<\/figcaption><\/figure><p class=\"wp-block-paragraph\"><strong>DDL\u7b97\u6cd5\uff1a<\/strong>\u51b3\u5b9a\u90e8\u5206\u6267\u884c\u65b9\u5f0f\uff1b\u6709\u7248\u672c\u548c\u64cd\u4f5c\u6761\u4ef6\u3002<\/p><p class=\"wp-block-paragraph\"><strong>\u5143\u6570\u636e\u9501\uff1a<\/strong>\u4fdd\u62a4\u7ed3\u6784\u8bbf\u95ee\u5173\u7cfb\uff1b\u5728\u7ebf\u64cd\u4f5c\u4e5f\u9700\u8003\u8651\u3002<\/p><p class=\"wp-block-paragraph\"><strong>\u53d8\u66f4\u5b8c\u6210\uff1a<\/strong>\u7ed3\u6784\u4e0e\u4e1a\u52a1\u5747\u6b63\u786e\uff1b\u4e0d\u53ea\u662f\u8bed\u53e5\u8fd4\u56de\u6210\u529f\u3002<\/p><h2 class=\"wp-block-heading\">\u600e\u6837\u786e\u8ba4\u5904\u7406\u5230\u4f4d<\/h2><p class=\"wp-block-paragraph\">\u6240\u9009\u7b97\u6cd5\u548c\u8d44\u6e90\u5f71\u54cd\u5df2\u9a8c\u8bc1\uff0c\u9501\u7b49\u5f85\u6709\u76d1\u63a7\u4e0e\u5904\u7f6e\u8fb9\u754c\uff0c\u76ee\u6807\u7ed3\u6784\u53ca\u5173\u952e\u8bfb\u5199\u6b63\u5e38\uff0c\u5931\u8d25\u6062\u590d\u65b9\u5f0f\u660e\u786e\u4e14\u672a\u5938\u5927\u96f6\u505c\u673a\u80fd\u529b\u3002<\/p><h2 class=\"wp-block-heading\">\u5bb9\u6613\u8bef\u5224\u7684\u8fb9\u754c<\/h2><p class=\"wp-block-paragraph\">\u672c\u6587\u4e0d\u4fdd\u8bc1\u4efb\u610fALTER\u90fd\u80fd\u5728\u7ebf\u5b8c\u6210\uff1b\u5bf9\u4e0d\u80fd\u5feb\u901f\u9006\u8f6c\u7684\u7ed3\u6784\u53d8\u5316\uff0c\u5e94\u5148\u786e\u8ba4\u5907\u4efd\u3001\u7a97\u53e3\u548c\u4e1a\u52a1\u56de\u9000\u8ba1\u5212\u3002<\/p><h2 class=\"wp-block-heading\">References<\/h2><p class=\"wp-block-paragraph\"><a href=\"https:\/\/dev.mysql.com\/doc\/refman\/8.4\/en\/innodb-online-ddl.html\" target=\"_blank\" rel=\"noopener\">MySQL\uff1aOnline DDL<\/a><\/p><p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.qunhe.com\/en\/knowledge\/\">\u8fd4\u56de\u7f51\u7ad9\u77e5\u8bc6\uff0c\u6309\u5177\u4f53\u95ee\u9898\u7ee7\u7eed\u9605\u8bfb<\/a><\/p><\/div>","protected":false},"excerpt":{"rendered":"<p>\u5728\u7ebfDDL\u3001INPLACE\u6216INSTANT\u7b49\u80fd\u529b\u6709\u660e\u786e\u7248\u672c\u3001\u5f15\u64ce\u4e0e\u64cd\u4f5c\u6761\u4ef6\uff0c\u5373\u4f7f\u652f\u6301\u67d0\u79cd\u7b97\u6cd5\uff0c\u4e5f\u4e0d\u4ee3\u8868\u5b8c\u5168\u6ca1\u6709\u5143\u6570\u636e\u9501\u6216\u8d44\u6e90\u5f71\u54cd\u3002\u5927\u8868\u7ed3\u6784\u53d8\u66f4\u5e94\u5148\u9a8c\u8bc1\u652f\u6301\u8303\u56f4\u3001\u9501\u7b49\u5f85\u53ca\u56de\u9000\uff0c\u4e0d\u6309\u4e00\u4e2a\u5173\u952e\u8bcd\u627f\u8bfa\u96f6\u5f71\u54cd\u3002<\/p>","protected":false},"author":1,"featured_media":5790,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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