字符串函数 | PingCAP 文档中心

相关文章推荐

耍酷的柳树 · Mysql查询今天到期、n天即将到期、还有n ...· 2 月前 ·

不拘小节的米饭 · mysql ...· 2 月前 ·

失恋的瀑布 · MySQL查询今天的数据（昨天、本月） - ...· 1 月前 ·

飘逸的米饭 · datetime和timestamp的区别-天翼云· 3 周前 ·

淡定的红薯 · php给pdf文件加上水印 - ...· 9 月前 ·

豪气的打火机 · DevExpress ...· 1 年前 ·

深沉的菠菜 · 使用Python在窗口中添加按钮的步骤 - ...· 1 年前 ·

任性的甜瓜 · Linux启动tomcat命令行关闭后服务会 ...· 1 年前 ·

想发财的脸盆 · 关于SQL解析，为何编程语言解析器ANTLR ...· 2 年前 ·

</noscript><div id="___gatsby"><div style="outline:none" tabindex="-1" id="gatsby-focus-wrapper"><style data-emotion="css 6ko3zs">.css-6ko3zs{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:column;-ms-flex-direction:column;flex-direction:column;width:100%;box-sizing:border-box;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;position:fixed;z-index:1100;top:0;left:auto;right:0;background-color:#1976d2;color:#fff;background-color:#f9f9f9;border-bottom:1px solid #e5e5e5;box-shadow:0px 1px 6px rgba(0, 0, 0, 0.08);height:5rem;}@media print{.css-6ko3zs{}}</style><style data-emotion="css foju0o">.css-foju0o{background-color:#fff;color:rgba(0, 0, 0, 0.87);-webkit-transition:box-shadow 300ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:box-shadow 300ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;box-shadow:0px 2px 4px -1px rgba(0,0,0,0.2),0px 4px 5px 0px rgba(0,0,0,0.14),0px 1px 10px 0px rgba(0,0,0,0.12);display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:column;-ms-flex-direction:column;flex-direction:column;width:100%;box-sizing:border-box;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;position:fixed;z-index:1100;top:0;left:auto;right:0;background-color:#1976d2;color:#fff;background-color:#f9f9f9;border-bottom:1px solid #e5e5e5;box-shadow:0px 1px 6px rgba(0, 0, 0, 0.08);height:5rem;}@media print{.css-foju0o{}}</style><header class="MuiPaper-root MuiPaper-elevation MuiPaper-elevation4 MuiAppBar-root MuiAppBar-colorPrimary MuiAppBar-positionFixed mui-fixed css-foju0o"><style data-emotion="css 1xw2ef0">.css-1xw2ef0{position:relative;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;padding-left:16px;padding-right:16px;min-height:56px;height:100%;}@media (min-width:600px){.css-1xw2ef0{padding-left:24px;padding-right:24px;}}@media (min-width:0px){@media (orientation: landscape){.css-1xw2ef0{min-height:48px;}}}@media (min-width:600px){.css-1xw2ef0{min-height:64px;}}@media (min-width:900px){.css-1xw2ef0{padding-left:2rem;padding-right:2rem;}}</style><div class="MuiToolbar-root MuiToolbar-gutters MuiToolbar-regular css-1xw2ef0"><style data-emotion="css 16bbyrv">.css-16bbyrv{text-align:center;-webkit-flex:0 0 auto;-ms-flex:0 0 auto;flex:0 0 auto;font-size:1.5rem;padding:8px;border-radius:50%;overflow:visible;color:rgba(0, 0, 0, 0.54);-webkit-transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;}.css-16bbyrv:hover{background-color:rgba(0, 0, 0, 0.04);}@media (hover: none){.css-16bbyrv:hover{background-color:transparent;}}.css-16bbyrv.Mui-disabled{background-color:transparent;color:rgba(0, 0, 0, 0.26);}@media (min-width:1200px){.css-16bbyrv{;}}</style><style data-emotion="css iuftj9">.css-iuftj9{display:-webkit-inline-box;display:-webkit-inline-flex;display:-ms-inline-flexbox;display:inline-flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-ms-flex-pack:center;-webkit-justify-content:center;justify-content:center;position:relative;box-sizing:border-box;-webkit-tap-highlight-color:transparent;background-color:transparent;outline:0;border:0;margin:0;border-radius:0;padding:0;cursor:pointer;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;vertical-align:middle;-moz-appearance:none;-webkit-appearance:none;-webkit-text-decoration:none;text-decoration:none;color:inherit;text-align:center;-webkit-flex:0 0 auto;-ms-flex:0 0 auto;flex:0 0 auto;font-size:1.5rem;padding:8px;border-radius:50%;overflow:visible;color:rgba(0, 0, 0, 0.54);-webkit-transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;}.css-iuftj9::-moz-focus-inner{border-style:none;}.css-iuftj9.Mui-disabled{pointer-events:none;cursor:default;}@media print{.css-iuftj9{-webkit-print-color-adjust:exact;color-adjust:exact;}}.css-iuftj9:hover{background-color:rgba(0, 0, 0, 0.04);}@media (hover: none){.css-iuftj9:hover{background-color:transparent;}}.css-iuftj9.Mui-disabled{background-color:transparent;color:rgba(0, 0, 0, 0.26);}@media (min-width:1200px){.css-iuftj9{;}}</style><button class="MuiButtonBase-root MuiIconButton-root MuiIconButton-sizeMedium css-iuftj9" tabindex="0" type="button" aria-label="menu"><style data-emotion="css vubbuv">.css-vubbuv{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;width:1em;height:1em;display:inline-block;fill:currentColor;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;-webkit-transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;font-size:1.5rem;}</style><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-vubbuv" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="MenuIcon"><path d="M3 18h18v-2H3v2zm0-5h18v-2H3v2zm0-7v2h18V6H3z"/></svg></button><style data-emotion="css a3xyjy">.css-a3xyjy{z-index:1200;}</style><style data-emotion="css 13tqxrv">@media (min-width:0px){.css-13tqxrv{;}}@media (min-width:900px){.css-13tqxrv{display:block;}}</style><div class="MuiBox-root css-13tqxrv"><style data-emotion="css tx8jsd">.css-tx8jsd{margin:0;font-size:1rem;line-height:1.5rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;}</style><a class="MuiTypography-root MuiTypography-body1 css-tx8jsd" target="_blank" href="https://cn.pingcap.com/" style="text-decoration:none"><style data-emotion="css uz5bjn">.css-uz5bjn{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;width:1em;height:1em;display:inline-block;fill:currentColor;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;-webkit-transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;font-size:1.5rem;width:6.75rem;}@media (min-width:0px){.css-uz5bjn{;}}@media (min-width:600px){.css-uz5bjn{display:block;}}</style><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-uz5bjn" focusable="false" aria-hidden="true" viewbox="0 0 769.89 203.08"><g id="Layer_2" data-name="Layer 2"><g id="Layer_1-2" data-name="Layer 1"><path fill="#082265" d="M100.11,47.34l-88-25.1A9.5,9.5,0,0,0,0,31.38v162.2a9.51,9.51,0,0,0,9.48,9.5,9.35,9.35,0,0,0,2.22-.26l88-21h0a9.48,9.48,0,0,0,7.3-9.25V56.48A9.54,9.54,0,0,0,100.11,47.34Z"/><path fill="#00aeef" d="M160.05,41.57a9.55,9.55,0,0,0-6.88-9.11L41.16.37A9.5,9.5,0,0,0,29,9.51V132.59a9.47,9.47,0,0,0,11.72,9.23l112.14-27a9.47,9.47,0,0,0,7.28-9.26Z"/><path fill="#303eab" d="M100.11,47.34,29,27.07V132.59a9.47,9.47,0,0,0,11.72,9.23L107,125.88V56.48A9.54,9.54,0,0,0,100.11,47.34Z"/><path fill="#082265" d="M576.1,126.26h0l-.23.37a40.12,40.12,0,0,1-13.72,13.09,36.62,36.62,0,0,1-18.78,5.43c-10.94,0-20.51-4.36-28.42-13a43.82,43.82,0,0,1-11.37-31,43.09,43.09,0,0,1,11.74-29.38c7.62-8.17,16.81-12.31,27.3-12.31,14.37-.13,25.2,5.8,33.13,18.13L576,78h.22l9.33-5.77a51.65,51.65,0,0,0-15.42-16.39,48.17,48.17,0,0,0-26.73-8.09A46.85,46.85,0,0,0,507.66,63c-9.94,10.23-15,23.28-15,38.77,0,15,5,28.08,14.84,38.9,9.81,10.64,21.69,16,35.33,16h.51c17.92-.37,32.69-9.06,42.11-24.6Z"/><polygon fill="#082265" points="645.84 49.09 633.16 49.09 586.01 154.63 601.05 154.63 615.63 119.55 615.65 119.55 620.8 108.59 620.78 108.59 639.76 64.05 658.36 108.59 631.66 108.59 626.79 119.55 662.69 119.55 677.4 154.63 690.66 154.63 645.84 49.09"/><path fill="#082265" d="M759.63,58.75c-7-6.32-15.81-9.52-26.18-9.52H699.3v105.4h12.44V113.34h0V102.25h0V60.59H734a24.73,24.73,0,0,1,16.22,5.63,18.12,18.12,0,0,1,7.37,14c.39,6.62-1.77,11.88-6.61,16.07a23.43,23.43,0,0,1-16.31,6H721.77v11.09h14.91a33.34,33.34,0,0,0,23.23-8.85,29,29,0,0,0,10-21.91C770,72.89,766.58,64.87,759.63,58.75Z"/><rect fill="#082265" x="296.25" y="51.17" width="12.44" height="12.44"/><rect fill="#082265" x="296.25" y="79.04" width="12.44" height="75.74"/><path fill="#082265" d="M483.63,147.21V114.69a38.6,38.6,0,0,0-12.25-29.2c-8.22-8.22-18.1-12.27-29.35-12a39.17,39.17,0,0,0-27.82,12.54,40.08,40.08,0,0,0-11.29,28.49,41,41,0,0,0,12.24,29.59c8.19,8.18,18,12.12,29.22,11.71a38.78,38.78,0,0,0,27.48-12.33v5.17m0,0c0,6.88-2.73,12.89-8.11,17.88a27.1,27.1,0,0,1-19,7.73,27.83,27.83,0,0,1-16.93-5.64,25.92,25.92,0,0,1-9-10.54l-9.52,5.5a36.63,36.63,0,0,0,9.94,12c6.6,5.25,14.75,8.13,24.23,8.54.59,0,1.18,0,1.77,0a40.89,40.89,0,0,0,26-9.25c8.17-6.52,12.32-14.86,12.32-24.8v-2.95m-12-31.74a29.23,29.23,0,0,1-8.41,20.22,25.68,25.68,0,0,1-19.5,8.38,27.3,27.3,0,0,1-20.2-8.39,28.22,28.22,0,0,1-8.66-20.34,28.66,28.66,0,0,1,7.88-20.61,27.21,27.21,0,0,1,19.53-9.45c.51,0,1,0,1.5,0,7.61,0,14,2.85,19.45,8.69A28.51,28.51,0,0,1,471.59,115.47Z"/><path fill="#082265" d="M274.1,58.75c-7-6.32-15.81-9.52-26.19-9.52H213.76v105.4h12.45V113.34h0V102.25h0V60.59h22.24a24.73,24.73,0,0,1,16.23,5.63,18.12,18.12,0,0,1,7.37,14c.39,6.62-1.77,11.88-6.61,16.07a23.43,23.43,0,0,1-16.31,6H236.24v11.09h14.91a33.34,33.34,0,0,0,23.23-8.85,29,29,0,0,0,10-21.91C284.5,72.89,281.05,64.87,274.1,58.75Z"/><path fill="#082265" d="M357.54,74.41c-9.92,0-18.3,3.43-24.94,10.2s-9.91,15.24-9.91,25.33v44.53h12V108.86a21.82,21.82,0,0,1,6.75-16.1A22.08,22.08,0,0,1,357.54,86a21.49,21.49,0,0,1,15.82,6.75,21.86,21.86,0,0,1,6.89,16.1v45.61h12V109.94c0-10.09-3.34-18.61-9.92-25.33A33.47,33.47,0,0,0,357.54,74.41Z"/></g></g></svg></a></div><style data-emotion="css 5qlh60">.css-5qlh60{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:row;-ms-flex-direction:row;flex-direction:row;padding-left:2rem;height:100%;}.css-5qlh60&gt;:not(style)+:not(style){margin:0;margin-left:24px;}@media (min-width:0px){.css-5qlh60{;}}@media (min-width:900px){.css-5qlh60{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;}}</style><div class="css-5qlh60"><style data-emotion="css kiou0g">.css-kiou0g{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;padding-top:0.25rem;padding-bottom:0.25rem;}</style><div class="MuiBox-root css-kiou0g"><a style="text-decoration:none" hreflang="zh" href="/zh/"><style data-emotion="css 2jgwiy">.css-2jgwiy{margin:0;font-size:1rem;line-height:1.5rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;color:#282a36;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,"IBM Plex Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji";display:-webkit-inline-box;display:-webkit-inline-flex;display:-ms-inline-flexbox;display:inline-flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;gap:4px;}</style><div class="MuiTypography-root MuiTypography-body1 css-2jgwiy">文档中心</div></a></div><div class="MuiBox-root css-kiou0g"><a style="text-decoration:none" hreflang="zh" href="/zh/tidb/stable"><div class="MuiTypography-root MuiTypography-body1 css-2jgwiy">TiDB</div></a></div><div class="MuiBox-root css-kiou0g"><a class="MuiTypography-root MuiTypography-body1 css-tx8jsd" target="_blank" href="https://asktug.com/" style="text-decoration:none"><div class="MuiTypography-root MuiTypography-body1 css-2jgwiy">社区</div></a></div><div class="MuiBox-root css-kiou0g"><a class="MuiTypography-root MuiTypography-body1 css-tx8jsd" target="_blank" href="https://cn.pingcap.com/contact/" style="text-decoration:none"><div class="MuiTypography-root MuiTypography-body1 css-2jgwiy">联系我们</div></a></div><div class="MuiBox-root css-kiou0g"><a class="MuiTypography-root MuiTypography-body1 css-tx8jsd" target="_blank" href="https://cn.pingcap.com/product/#SelectProduct" style="text-decoration:none"><div class="MuiTypography-root MuiTypography-body1 css-2jgwiy"><style data-emotion="css xnd31y">.css-xnd31y{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;width:1em;height:1em;display:inline-block;fill:currentColor;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;-webkit-transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;font-size:inherit;padding-top:0.5rem;}</style><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeInherit css-xnd31y" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="DownloadIcon"><path d="M5 20h14v-2H5v2zM19 9h-4V3H9v6H5l7 7 7-7z"/></svg></div></a></div></div><style data-emotion="css 1vn3uc0">.css-1vn3uc0{color:#282a36;}@media (min-width:900px){.css-1vn3uc0{;}}</style><div class="MuiBox-root css-1vn3uc0"><style data-emotion="css btg76o">.css-btg76o{text-transform:none;font-family:-apple-system,"Poppins","Helvetica Neue",sans-serif,"Noto Sans","Fira Code","IBM Plex Sans","sans-serif";font-weight:500;font-size:0.875rem;line-height:1.75;min-width:64px;padding:6px 8px;border-radius:4px;-webkit-transition:background-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,border-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:background-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,border-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;color:inherit;border-color:currentColor;box-shadow:none;}.css-btg76o:hover{-webkit-text-decoration:none;text-decoration:none;background-color:rgba(0, 0, 0, 0.04);}@media (hover: none){.css-btg76o:hover{background-color:transparent;}}.css-btg76o.Mui-disabled{color:rgba(0, 0, 0, 0.26);}.css-btg76o:hover{box-shadow:none;}.css-btg76o.Mui-focusVisible{box-shadow:none;}.css-btg76o:active{box-shadow:none;}.css-btg76o.Mui-disabled{box-shadow:none;}</style><style data-emotion="css 1ei260h">.css-1ei260h{display:-webkit-inline-box;display:-webkit-inline-flex;display:-ms-inline-flexbox;display:inline-flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-ms-flex-pack:center;-webkit-justify-content:center;justify-content:center;position:relative;box-sizing:border-box;-webkit-tap-highlight-color:transparent;background-color:transparent;outline:0;border:0;margin:0;border-radius:0;padding:0;cursor:pointer;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;vertical-align:middle;-moz-appearance:none;-webkit-appearance:none;-webkit-text-decoration:none;text-decoration:none;color:inherit;text-transform:none;font-family:-apple-system,"Poppins","Helvetica Neue",sans-serif,"Noto Sans","Fira Code","IBM Plex Sans","sans-serif";font-weight:500;font-size:0.875rem;line-height:1.75;min-width:64px;padding:6px 8px;border-radius:4px;-webkit-transition:background-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,border-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:background-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,border-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;color:inherit;border-color:currentColor;box-shadow:none;}.css-1ei260h::-moz-focus-inner{border-style:none;}.css-1ei260h.Mui-disabled{pointer-events:none;cursor:default;}@media print{.css-1ei260h{-webkit-print-color-adjust:exact;color-adjust:exact;}}.css-1ei260h:hover{-webkit-text-decoration:none;text-decoration:none;background-color:rgba(0, 0, 0, 0.04);}@media (hover: none){.css-1ei260h:hover{background-color:transparent;}}.css-1ei260h.Mui-disabled{color:rgba(0, 0, 0, 0.26);}.css-1ei260h:hover{box-shadow:none;}.css-1ei260h.Mui-focusVisible{box-shadow:none;}.css-1ei260h:active{box-shadow:none;}.css-1ei260h.Mui-disabled{box-shadow:none;}</style><button class="MuiButtonBase-root MuiButton-root MuiButton-text MuiButton-textInherit MuiButton-sizeMedium MuiButton-textSizeMedium MuiButton-colorInherit MuiButton-disableElevation css-1ei260h" tabindex="0" type="button" id="header-nav-items" aria-haspopup="true"><style data-emotion="css 6xugel">.css-6xugel{display:inherit;margin-right:8px;margin-left:-4px;}.css-6xugel&gt;*:nth-of-type(1){font-size:20px;}</style><span class="MuiButton-startIcon MuiButton-iconSizeMedium css-6xugel"><style data-emotion="css 1x9zct">.css-1x9zct{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;width:1em;height:1em;display:inline-block;fill:currentColor;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;-webkit-transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;font-size:1.5rem;width:6.75rem;height:1.5rem;}</style><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-1x9zct" focusable="false" aria-hidden="true" viewbox="0 0 769.89 203.08"><g id="Layer_2" data-name="Layer 2"><g id="Layer_1-2" data-name="Layer 1"><path fill="#082265" d="M100.11,47.34l-88-25.1A9.5,9.5,0,0,0,0,31.38v162.2a9.51,9.51,0,0,0,9.48,9.5,9.35,9.35,0,0,0,2.22-.26l88-21h0a9.48,9.48,0,0,0,7.3-9.25V56.48A9.54,9.54,0,0,0,100.11,47.34Z"/><path fill="#00aeef" d="M160.05,41.57a9.55,9.55,0,0,0-6.88-9.11L41.16.37A9.5,9.5,0,0,0,29,9.51V132.59a9.47,9.47,0,0,0,11.72,9.23l112.14-27a9.47,9.47,0,0,0,7.28-9.26Z"/><path fill="#303eab" d="M100.11,47.34,29,27.07V132.59a9.47,9.47,0,0,0,11.72,9.23L107,125.88V56.48A9.54,9.54,0,0,0,100.11,47.34Z"/><path fill="#082265" d="M576.1,126.26h0l-.23.37a40.12,40.12,0,0,1-13.72,13.09,36.62,36.62,0,0,1-18.78,5.43c-10.94,0-20.51-4.36-28.42-13a43.82,43.82,0,0,1-11.37-31,43.09,43.09,0,0,1,11.74-29.38c7.62-8.17,16.81-12.31,27.3-12.31,14.37-.13,25.2,5.8,33.13,18.13L576,78h.22l9.33-5.77a51.65,51.65,0,0,0-15.42-16.39,48.17,48.17,0,0,0-26.73-8.09A46.85,46.85,0,0,0,507.66,63c-9.94,10.23-15,23.28-15,38.77,0,15,5,28.08,14.84,38.9,9.81,10.64,21.69,16,35.33,16h.51c17.92-.37,32.69-9.06,42.11-24.6Z"/><polygon fill="#082265" points="645.84 49.09 633.16 49.09 586.01 154.63 601.05 154.63 615.63 119.55 615.65 119.55 620.8 108.59 620.78 108.59 639.76 64.05 658.36 108.59 631.66 108.59 626.79 119.55 662.69 119.55 677.4 154.63 690.66 154.63 645.84 49.09"/><path fill="#082265" d="M759.63,58.75c-7-6.32-15.81-9.52-26.18-9.52H699.3v105.4h12.44V113.34h0V102.25h0V60.59H734a24.73,24.73,0,0,1,16.22,5.63,18.12,18.12,0,0,1,7.37,14c.39,6.62-1.77,11.88-6.61,16.07a23.43,23.43,0,0,1-16.31,6H721.77v11.09h14.91a33.34,33.34,0,0,0,23.23-8.85,29,29,0,0,0,10-21.91C770,72.89,766.58,64.87,759.63,58.75Z"/><rect fill="#082265" x="296.25" y="51.17" width="12.44" height="12.44"/><rect fill="#082265" x="296.25" y="79.04" width="12.44" height="75.74"/><path fill="#082265" d="M483.63,147.21V114.69a38.6,38.6,0,0,0-12.25-29.2c-8.22-8.22-18.1-12.27-29.35-12a39.17,39.17,0,0,0-27.82,12.54,40.08,40.08,0,0,0-11.29,28.49,41,41,0,0,0,12.24,29.59c8.19,8.18,18,12.12,29.22,11.71a38.78,38.78,0,0,0,27.48-12.33v5.17m0,0c0,6.88-2.73,12.89-8.11,17.88a27.1,27.1,0,0,1-19,7.73,27.83,27.83,0,0,1-16.93-5.64,25.92,25.92,0,0,1-9-10.54l-9.52,5.5a36.63,36.63,0,0,0,9.94,12c6.6,5.25,14.75,8.13,24.23,8.54.59,0,1.18,0,1.77,0a40.89,40.89,0,0,0,26-9.25c8.17-6.52,12.32-14.86,12.32-24.8v-2.95m-12-31.74a29.23,29.23,0,0,1-8.41,20.22,25.68,25.68,0,0,1-19.5,8.38,27.3,27.3,0,0,1-20.2-8.39,28.22,28.22,0,0,1-8.66-20.34,28.66,28.66,0,0,1,7.88-20.61,27.21,27.21,0,0,1,19.53-9.45c.51,0,1,0,1.5,0,7.61,0,14,2.85,19.45,8.69A28.51,28.51,0,0,1,471.59,115.47Z"/><path fill="#082265" d="M274.1,58.75c-7-6.32-15.81-9.52-26.19-9.52H213.76v105.4h12.45V113.34h0V102.25h0V60.59h22.24a24.73,24.73,0,0,1,16.23,5.63,18.12,18.12,0,0,1,7.37,14c.39,6.62-1.77,11.88-6.61,16.07a23.43,23.43,0,0,1-16.31,6H236.24v11.09h14.91a33.34,33.34,0,0,0,23.23-8.85,29,29,0,0,0,10-21.91C284.5,72.89,281.05,64.87,274.1,58.75Z"/><path fill="#082265" d="M357.54,74.41c-9.92,0-18.3,3.43-24.94,10.2s-9.91,15.24-9.91,25.33v44.53h12V108.86a21.82,21.82,0,0,1,6.75-16.1A22.08,22.08,0,0,1,357.54,86a21.49,21.49,0,0,1,15.82,6.75,21.86,21.86,0,0,1,6.89,16.1v45.61h12V109.94c0-10.09-3.34-18.61-9.92-25.33A33.47,33.47,0,0,0,357.54,74.41Z"/></g></g></svg></span><style data-emotion="css 1n4a93h">.css-1n4a93h{display:inherit;margin-right:-4px;margin-left:8px;}.css-1n4a93h&gt;*:nth-of-type(1){font-size:20px;}</style><span class="MuiButton-endIcon MuiButton-iconSizeMedium css-1n4a93h"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-vubbuv" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="KeyboardArrowDownIcon"><path d="M7.41 8.59 12 13.17l4.59-4.58L18 10l-6 6-6-6 1.41-1.41z"/></svg></span></button></div><style data-emotion="css jnv64h">.css-jnv64h{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:row;-ms-flex-direction:row;flex-direction:row;margin-left:auto;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;}@media (min-width:0px){.css-jnv64h&gt;:not(style)+:not(style){margin:0;margin-left:8px;}}@media (min-width:1200px){.css-jnv64h&gt;:not(style)+:not(style){margin:0;margin-left:24px;}}</style><div class="css-jnv64h"><style data-emotion="css 1qlh2t1">.css-1qlh2t1{color:#282a36;}</style><div class="MuiBox-root css-1qlh2t1"><style data-emotion="css 1mvsusm">.css-1mvsusm{text-align:center;-webkit-flex:0 0 auto;-ms-flex:0 0 auto;flex:0 0 auto;font-size:1.5rem;padding:8px;border-radius:50%;overflow:visible;color:rgba(0, 0, 0, 0.54);-webkit-transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;color:inherit;}.css-1mvsusm:hover{background-color:rgba(0, 0, 0, 0.04);}@media (hover: none){.css-1mvsusm:hover{background-color:transparent;}}.css-1mvsusm.Mui-disabled{background-color:transparent;color:rgba(0, 0, 0, 0.26);}@media (min-width:1200px){.css-1mvsusm{;}}</style><style data-emotion="css jwr93t">.css-jwr93t{display:-webkit-inline-box;display:-webkit-inline-flex;display:-ms-inline-flexbox;display:inline-flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-ms-flex-pack:center;-webkit-justify-content:center;justify-content:center;position:relative;box-sizing:border-box;-webkit-tap-highlight-color:transparent;background-color:transparent;outline:0;border:0;margin:0;border-radius:0;padding:0;cursor:pointer;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;vertical-align:middle;-moz-appearance:none;-webkit-appearance:none;-webkit-text-decoration:none;text-decoration:none;color:inherit;text-align:center;-webkit-flex:0 0 auto;-ms-flex:0 0 auto;flex:0 0 auto;font-size:1.5rem;padding:8px;border-radius:50%;overflow:visible;color:rgba(0, 0, 0, 0.54);-webkit-transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;color:inherit;}.css-jwr93t::-moz-focus-inner{border-style:none;}.css-jwr93t.Mui-disabled{pointer-events:none;cursor:default;}@media print{.css-jwr93t{-webkit-print-color-adjust:exact;color-adjust:exact;}}.css-jwr93t:hover{background-color:rgba(0, 0, 0, 0.04);}@media (hover: none){.css-jwr93t:hover{background-color:transparent;}}.css-jwr93t.Mui-disabled{background-color:transparent;color:rgba(0, 0, 0, 0.26);}@media (min-width:1200px){.css-jwr93t{;}}</style><button class="MuiButtonBase-root MuiIconButton-root MuiIconButton-sizeMedium css-jwr93t" tabindex="0" type="button"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-vubbuv" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="LanguageIcon"><path d="M11.99 2C6.47 2 2 6.48 2 12s4.47 10 9.99 10C17.52 22 22 17.52 22 12S17.52 2 11.99 2zm6.93 6h-2.95c-.32-1.25-.78-2.45-1.38-3.56 1.84.63 3.37 1.91 4.33 3.56zM12 4.04c.83 1.2 1.48 2.53 1.91 3.96h-3.82c.43-1.43 1.08-2.76 1.91-3.96zM4.26 14C4.1 13.36 4 12.69 4 12s.1-1.36.26-2h3.38c-.08.66-.14 1.32-.14 2 0 .68.06 1.34.14 2H4.26zm.82 2h2.95c.32 1.25.78 2.45 1.38 3.56-1.84-.63-3.37-1.9-4.33-3.56zm2.95-8H5.08c.96-1.66 2.49-2.93 4.33-3.56C8.81 5.55 8.35 6.75 8.03 8zM12 19.96c-.83-1.2-1.48-2.53-1.91-3.96h3.82c-.43 1.43-1.08 2.76-1.91 3.96zM14.34 14H9.66c-.09-.66-.16-1.32-.16-2 0-.68.07-1.35.16-2h4.68c.09.65.16 1.32.16 2 0 .68-.07 1.34-.16 2zm.25 5.56c.6-1.11 1.06-2.31 1.38-3.56h2.95c-.96 1.65-2.49 2.93-4.33 3.56zM16.36 14c.08-.66.14-1.32.14-2 0-.68-.06-1.34-.14-2h3.38c.16.64.26 1.31.26 2s-.1 1.36-.26 2h-3.38z"/></svg></button><style data-emotion="css t5gsfy">.css-t5gsfy{text-transform:none;font-family:-apple-system,"Poppins","Helvetica Neue",sans-serif,"Noto Sans","Fira Code","IBM Plex Sans","sans-serif";font-weight:500;font-size:0.875rem;line-height:1.75;min-width:64px;padding:6px 8px;border-radius:4px;-webkit-transition:background-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,border-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:background-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,border-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;color:inherit;border-color:currentColor;box-shadow:none;}.css-t5gsfy:hover{-webkit-text-decoration:none;text-decoration:none;background-color:rgba(0, 0, 0, 0.04);}@media (hover: none){.css-t5gsfy:hover{background-color:transparent;}}.css-t5gsfy.Mui-disabled{color:rgba(0, 0, 0, 0.26);}.css-t5gsfy:hover{box-shadow:none;}.css-t5gsfy.Mui-focusVisible{box-shadow:none;}.css-t5gsfy:active{box-shadow:none;}.css-t5gsfy.Mui-disabled{box-shadow:none;}@media (min-width:0px){.css-t5gsfy{;}}@media (min-width:1200px){.css-t5gsfy{display:-webkit-inline-box;display:-webkit-inline-flex;display:-ms-inline-flexbox;display:inline-flex;}}</style><style data-emotion="css 1csz7wa">.css-1csz7wa{display:-webkit-inline-box;display:-webkit-inline-flex;display:-ms-inline-flexbox;display:inline-flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-ms-flex-pack:center;-webkit-justify-content:center;justify-content:center;position:relative;box-sizing:border-box;-webkit-tap-highlight-color:transparent;background-color:transparent;outline:0;border:0;margin:0;border-radius:0;padding:0;cursor:pointer;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;vertical-align:middle;-moz-appearance:none;-webkit-appearance:none;-webkit-text-decoration:none;text-decoration:none;color:inherit;text-transform:none;font-family:-apple-system,"Poppins","Helvetica Neue",sans-serif,"Noto Sans","Fira Code","IBM Plex Sans","sans-serif";font-weight:500;font-size:0.875rem;line-height:1.75;min-width:64px;padding:6px 8px;border-radius:4px;-webkit-transition:background-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,border-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:background-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,border-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;color:inherit;border-color:currentColor;box-shadow:none;}.css-1csz7wa::-moz-focus-inner{border-style:none;}.css-1csz7wa.Mui-disabled{pointer-events:none;cursor:default;}@media print{.css-1csz7wa{-webkit-print-color-adjust:exact;color-adjust:exact;}}.css-1csz7wa:hover{-webkit-text-decoration:none;text-decoration:none;background-color:rgba(0, 0, 0, 0.04);}@media (hover: none){.css-1csz7wa:hover{background-color:transparent;}}.css-1csz7wa.Mui-disabled{color:rgba(0, 0, 0, 0.26);}.css-1csz7wa:hover{box-shadow:none;}.css-1csz7wa.Mui-focusVisible{box-shadow:none;}.css-1csz7wa:active{box-shadow:none;}.css-1csz7wa.Mui-disabled{box-shadow:none;}@media (min-width:0px){.css-1csz7wa{;}}@media (min-width:1200px){.css-1csz7wa{display:-webkit-inline-box;display:-webkit-inline-flex;display:-ms-inline-flexbox;display:inline-flex;}}</style><button class="MuiButtonBase-root MuiButton-root MuiButton-text MuiButton-textInherit MuiButton-sizeMedium MuiButton-textSizeMedium MuiButton-colorInherit MuiButton-disableElevation css-1csz7wa" tabindex="0" type="button" id="header-lang-switch" aria-haspopup="true"><span class="MuiButton-startIcon MuiButton-iconSizeMedium css-6xugel"><style data-emotion="css 1slalk2">.css-1slalk2{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;width:1em;height:1em;display:inline-block;fill:currentColor;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;-webkit-transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;font-size:1.5rem;fill:#282a36;}</style><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-1slalk2" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="LanguageIcon"><path d="M11.99 2C6.47 2 2 6.48 2 12s4.47 10 9.99 10C17.52 22 22 17.52 22 12S17.52 2 11.99 2zm6.93 6h-2.95c-.32-1.25-.78-2.45-1.38-3.56 1.84.63 3.37 1.91 4.33 3.56zM12 4.04c.83 1.2 1.48 2.53 1.91 3.96h-3.82c.43-1.43 1.08-2.76 1.91-3.96zM4.26 14C4.1 13.36 4 12.69 4 12s.1-1.36.26-2h3.38c-.08.66-.14 1.32-.14 2 0 .68.06 1.34.14 2H4.26zm.82 2h2.95c.32 1.25.78 2.45 1.38 3.56-1.84-.63-3.37-1.9-4.33-3.56zm2.95-8H5.08c.96-1.66 2.49-2.93 4.33-3.56C8.81 5.55 8.35 6.75 8.03 8zM12 19.96c-.83-1.2-1.48-2.53-1.91-3.96h3.82c-.43 1.43-1.08 2.76-1.91 3.96zM14.34 14H9.66c-.09-.66-.16-1.32-.16-2 0-.68.07-1.35.16-2h4.68c.09.65.16 1.32.16 2 0 .68-.07 1.34-.16 2zm.25 5.56c.6-1.11 1.06-2.31 1.38-3.56h2.95c-.96 1.65-2.49 2.93-4.33 3.56zM16.36 14c.08-.66.14-1.32.14-2 0-.68-.06-1.34-.14-2h3.38c.16.64.26 1.31.26 2s-.1 1.36-.26 2h-3.38z"/></svg></span><style data-emotion="css 15r93eu">.css-15r93eu{margin:0;font-size:1rem;line-height:1.5rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;color:inherit;}</style><span class="MuiTypography-root MuiTypography-body1 css-15r93eu">语言</span><span class="MuiButton-endIcon MuiButton-iconSizeMedium css-1n4a93h"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-1slalk2" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="KeyboardArrowDownIcon"><path d="M7.41 8.59 12 13.17l4.59-4.58L18 10l-6 6-6-6 1.41-1.41z"/></svg></span></button></div><button class="MuiButtonBase-root MuiIconButton-root MuiIconButton-sizeMedium css-iuftj9" tabindex="0" type="button"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-vubbuv" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="SearchIcon"><path d="M15.5 14h-.79l-.28-.27C15.41 12.59 16 11.11 16 9.5 16 5.91 13.09 3 9.5 3S3 5.91 3 9.5 5.91 16 9.5 16c1.61 0 3.09-.59 4.23-1.57l.27.28v.79l5 4.99L20.49 19l-4.99-5zm-6 0C7.01 14 5 11.99 5 9.5S7.01 5 9.5 5 14 7.01 14 9.5 11.99 14 9.5 14z"/></svg></button><style data-emotion="css ahtg4s">.css-ahtg4s{max-width:13rem;}@media (min-width:0px){.css-ahtg4s{;}}@media (min-width:1200px){.css-ahtg4s{display:block;}}</style><form class="MuiBox-root css-ahtg4s" novalidate="" autocomplete="off"><style data-emotion="css 24u6h2">.css-24u6h2 .MuiOutlinedInput-root:hover fieldset{border-color:#0ca6f2;border-width:1px;}.css-24u6h2 .MuiOutlinedInput-root.Mui-focused fieldset{border-color:#0ca6f2;border-width:1px;}</style><style data-emotion="css fzbqas">.css-fzbqas .MuiOutlinedInput-root:hover fieldset{border-color:#0ca6f2;border-width:1px;}.css-fzbqas .MuiOutlinedInput-root.Mui-focused fieldset{border-color:#0ca6f2;border-width:1px;}</style><style data-emotion="css bj7gct">.css-bj7gct{display:-webkit-inline-box;display:-webkit-inline-flex;display:-ms-inline-flexbox;display:inline-flex;-webkit-flex-direction:column;-ms-flex-direction:column;flex-direction:column;position:relative;min-width:0;padding:0;margin:0;border:0;vertical-align:top;width:100%;}.css-bj7gct .MuiOutlinedInput-root:hover fieldset{border-color:#0ca6f2;border-width:1px;}.css-bj7gct .MuiOutlinedInput-root.Mui-focused fieldset{border-color:#0ca6f2;border-width:1px;}</style><div class="MuiFormControl-root MuiFormControl-fullWidth MuiTextField-root css-bj7gct"><style data-emotion="css-global 1prfaxn">@-webkit-keyframes mui-auto-fill{from{display:block;}}@keyframes mui-auto-fill{from{display:block;}}@-webkit-keyframes mui-auto-fill-cancel{from{display:block;}}@keyframes mui-auto-fill-cancel{from{display:block;}}</style><style data-emotion="css sv5gtw">.css-sv5gtw{font-size:1rem;line-height:1.4375em;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:rgba(0, 0, 0, 0.87);box-sizing:border-box;position:relative;cursor:text;display:-webkit-inline-box;display:-webkit-inline-flex;display:-ms-inline-flexbox;display:inline-flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;width:100%;position:relative;border-radius:4px;padding-left:14px;background:#fff;}.css-sv5gtw.Mui-disabled{color:rgba(0, 0, 0, 0.38);cursor:default;}.css-sv5gtw:hover .MuiOutlinedInput-notchedOutline{border-color:rgba(0, 0, 0, 0.87);}@media (hover: none){.css-sv5gtw:hover .MuiOutlinedInput-notchedOutline{border-color:rgba(0, 0, 0, 0.23);}}.css-sv5gtw.Mui-focused .MuiOutlinedInput-notchedOutline{border-color:#1976d2;border-width:2px;}.css-sv5gtw.Mui-error .MuiOutlinedInput-notchedOutline{border-color:#d32f2f;}.css-sv5gtw.Mui-disabled .MuiOutlinedInput-notchedOutline{border-color:rgba(0, 0, 0, 0.26);}</style><div class="MuiInputBase-root MuiOutlinedInput-root MuiInputBase-colorPrimary MuiInputBase-fullWidth MuiInputBase-formControl MuiInputBase-sizeSmall MuiInputBase-adornedStart css-sv5gtw"><style data-emotion="css 1a6giau">.css-1a6giau{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;height:0.01em;max-height:2em;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;white-space:nowrap;color:rgba(0, 0, 0, 0.54);margin-right:8px;}</style><div class="MuiInputAdornment-root MuiInputAdornment-positionStart MuiInputAdornment-outlined MuiInputAdornment-sizeSmall css-1a6giau"><span class="notranslate"></span><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-vubbuv" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="SearchIcon"><path d="M15.5 14h-.79l-.28-.27C15.41 12.59 16 11.11 16 9.5 16 5.91 13.09 3 9.5 3S3 5.91 3 9.5 5.91 16 9.5 16c1.61 0 3.09-.59 4.23-1.57l.27.28v.79l5 4.99L20.49 19l-4.99-5zm-6 0C7.01 14 5 11.99 5 9.5S7.01 5 9.5 5 14 7.01 14 9.5 11.99 14 9.5 14z"/></svg></div><style data-emotion="css f2zrvi">.css-f2zrvi{font:inherit;letter-spacing:inherit;color:currentColor;padding:4px 0 5px;border:0;box-sizing:content-box;background:none;height:1.4375em;margin:0;-webkit-tap-highlight-color:transparent;display:block;min-width:0;width:100%;-webkit-animation-name:mui-auto-fill-cancel;animation-name:mui-auto-fill-cancel;-webkit-animation-duration:10ms;animation-duration:10ms;padding-top:1px;-moz-appearance:textfield;padding:8.5px 14px;padding-left:0;}.css-f2zrvi::-webkit-input-placeholder{color:currentColor;opacity:0.42;-webkit-transition:opacity 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:opacity 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;}.css-f2zrvi::-moz-placeholder{color:currentColor;opacity:0.42;-webkit-transition:opacity 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:opacity 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;}.css-f2zrvi:-ms-input-placeholder{color:currentColor;opacity:0.42;-webkit-transition:opacity 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:opacity 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;}.css-f2zrvi::-ms-input-placeholder{color:currentColor;opacity:0.42;-webkit-transition:opacity 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:opacity 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;}.css-f2zrvi:focus{outline:0;}.css-f2zrvi:invalid{box-shadow:none;}.css-f2zrvi::-webkit-search-decoration{-webkit-appearance:none;}label[data-shrink=false]+.MuiInputBase-formControl .css-f2zrvi::-webkit-input-placeholder{opacity:0!important;}label[data-shrink=false]+.MuiInputBase-formControl .css-f2zrvi::-moz-placeholder{opacity:0!important;}label[data-shrink=false]+.MuiInputBase-formControl .css-f2zrvi:-ms-input-placeholder{opacity:0!important;}label[data-shrink=false]+.MuiInputBase-formControl .css-f2zrvi::-ms-input-placeholder{opacity:0!important;}label[data-shrink=false]+.MuiInputBase-formControl .css-f2zrvi:focus::-webkit-input-placeholder{opacity:0.42;}label[data-shrink=false]+.MuiInputBase-formControl .css-f2zrvi:focus::-moz-placeholder{opacity:0.42;}label[data-shrink=false]+.MuiInputBase-formControl .css-f2zrvi:focus:-ms-input-placeholder{opacity:0.42;}label[data-shrink=false]+.MuiInputBase-formControl .css-f2zrvi:focus::-ms-input-placeholder{opacity:0.42;}.css-f2zrvi.Mui-disabled{opacity:1;-webkit-text-fill-color:rgba(0, 0, 0, 0.38);}.css-f2zrvi:-webkit-autofill{-webkit-animation-duration:5000s;animation-duration:5000s;-webkit-animation-name:mui-auto-fill;animation-name:mui-auto-fill;}.css-f2zrvi:-webkit-autofill{border-radius:inherit;}</style><input type="search" aria-invalid="false" id="doc-search" placeholder="搜索文档" value="" class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputTypeSearch MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart css-f2zrvi"/><style data-emotion="css 19w1uun">.css-19w1uun{border-color:rgba(0, 0, 0, 0.23);}</style><style data-emotion="css igs3ac">.css-igs3ac{text-align:left;bottom:0;right:0;top:-5px;left:0;margin:0;padding:0 8px;pointer-events:none;border-radius:inherit;border-style:solid;border-width:1px;overflow:hidden;min-width:0%;border-color:rgba(0, 0, 0, 0.23);}</style><fieldset aria-hidden="true" class="MuiOutlinedInput-notchedOutline css-igs3ac"><style data-emotion="css hdw1oc">.css-hdw1oc{float:unset;overflow:hidden;padding:0;line-height:11px;-webkit-transition:width 150ms cubic-bezier(0.0, 0, 0.2, 1) 0ms;transition:width 150ms cubic-bezier(0.0, 0, 0.2, 1) 0ms;}</style><legend class="css-hdw1oc"><span class="notranslate"></span></legend></fieldset></div></div></form></div></div></header><style data-emotion="css s1brf2">.css-s1brf2{margin-top:5rem;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;}</style><div class="PingCAP-Doc MuiBox-root css-s1brf2"><style data-emotion="css hboir5">.css-hboir5{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;width:100%;}</style><div class="MuiBox-root css-hboir5"><style data-emotion="css 2tzg8">.css-2tzg8{width:18.75rem;border-right:1px solid #E5E4E4;}@media (min-width:0px){.css-2tzg8{;}}@media (min-width:1200px){.css-2tzg8{display:block;}}</style><aside class="MuiBox-root css-2tzg8"><style data-emotion="css 1eohm8p">.css-1eohm8p{position:-webkit-sticky;position:sticky;top:5rem;height:100%;max-height:calc(100vh - 7rem);overflow-y:auto;padding:1rem;}</style><div class="MuiBox-root css-1eohm8p"><style data-emotion="css fmyu0n">.css-fmyu0n{text-transform:none;font-family:-apple-system,"Poppins","Helvetica Neue",sans-serif,"Noto Sans","Fira Code","IBM Plex Sans","sans-serif";font-weight:500;font-size:0.875rem;line-height:1.75;min-width:64px;padding:6px 8px;border-radius:4px;-webkit-transition:background-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,border-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:background-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,border-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;color:#1976d2;width:100%;height:2rem;-webkit-box-pack:justify;-webkit-justify-content:space-between;justify-content:space-between;border-style:solid;border-width:1px;border-color:#e5e5e5;margin-bottom:1rem;}.css-fmyu0n:hover{-webkit-text-decoration:none;text-decoration:none;background-color:rgba(25, 118, 210, 0.04);}@media (hover: none){.css-fmyu0n:hover{background-color:transparent;}}.css-fmyu0n.Mui-disabled{color:rgba(0, 0, 0, 0.26);}</style><style data-emotion="css 1rq233s">.css-1rq233s{display:-webkit-inline-box;display:-webkit-inline-flex;display:-ms-inline-flexbox;display:inline-flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-ms-flex-pack:center;-webkit-justify-content:center;justify-content:center;position:relative;box-sizing:border-box;-webkit-tap-highlight-color:transparent;background-color:transparent;outline:0;border:0;margin:0;border-radius:0;padding:0;cursor:pointer;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;vertical-align:middle;-moz-appearance:none;-webkit-appearance:none;-webkit-text-decoration:none;text-decoration:none;color:inherit;text-transform:none;font-family:-apple-system,"Poppins","Helvetica Neue",sans-serif,"Noto Sans","Fira Code","IBM Plex Sans","sans-serif";font-weight:500;font-size:0.875rem;line-height:1.75;min-width:64px;padding:6px 8px;border-radius:4px;-webkit-transition:background-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,border-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:background-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,border-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;color:#1976d2;width:100%;height:2rem;-webkit-box-pack:justify;-webkit-justify-content:space-between;justify-content:space-between;border-style:solid;border-width:1px;border-color:#e5e5e5;margin-bottom:1rem;}.css-1rq233s::-moz-focus-inner{border-style:none;}.css-1rq233s.Mui-disabled{pointer-events:none;cursor:default;}@media print{.css-1rq233s{-webkit-print-color-adjust:exact;color-adjust:exact;}}.css-1rq233s:hover{-webkit-text-decoration:none;text-decoration:none;background-color:rgba(25, 118, 210, 0.04);}@media (hover: none){.css-1rq233s:hover{background-color:transparent;}}.css-1rq233s.Mui-disabled{color:rgba(0, 0, 0, 0.26);}</style><button class="MuiButtonBase-root MuiButton-root MuiButton-text MuiButton-textPrimary MuiButton-sizeMedium MuiButton-textSizeMedium css-1rq233s" tabindex="0" type="button" id="version-select-button" aria-haspopup="true"><style data-emotion="css 3cb5vr">.css-3cb5vr{margin:0;font-size:1rem;line-height:1.5rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;padding:0 0.25rem;font-size:0.875rem;line-height:1.25rem;}</style><div class="MuiTypography-root MuiTypography-body1 css-3cb5vr">v7.1</div><style data-emotion="css 1n4a93h">.css-1n4a93h{display:inherit;margin-right:-4px;margin-left:8px;}.css-1n4a93h&gt;*:nth-of-type(1){font-size:20px;}</style><span class="MuiButton-endIcon MuiButton-iconSizeMedium css-1n4a93h"><style data-emotion="css b5l66">.css-b5l66{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;width:1em;height:1em;display:inline-block;fill:currentColor;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;-webkit-transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;font-size:1.5rem;-webkit-transform:rotate(0deg);-moz-transform:rotate(0deg);-ms-transform:rotate(0deg);transform:rotate(0deg);height:1.5rem;width:1.5rem;fill:#999999;margin-right:0.25rem;}</style><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-b5l66" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></span></button><style data-emotion="css 1c58svf">.css-1c58svf .MuiPaper-root{border-radius:6px;margin-top:8px;min-width:268px;color:rgb(55, 65, 81);box-shadow:rgb(255, 255, 255) 0px 0px 0px 0px,rgba(0, 0, 0, 0.05) 0px 0px 0px 1px,rgba(0, 0, 0, 0.1) 0px 10px 15px -3px,rgba(0, 0, 0, 0.05) 0px 4px 6px -2px;}.css-1c58svf .MuiPaper-root .MuiMenu-list{padding:4px 0;}.css-1c58svf .MuiPaper-root .MuiMenuItem-root .MuiSvgIcon-root{font-size:18px;color:rgba(0, 0, 0, 0.6);margin-right:12px;}.css-1c58svf .MuiPaper-root .MuiMenuItem-root:active{background-color:rgba(25, 118, 210, 0.08);}</style><style data-emotion="css yvxbj">.css-yvxbj .MuiPaper-root{border-radius:6px;margin-top:8px;min-width:268px;color:rgb(55, 65, 81);box-shadow:rgb(255, 255, 255) 0px 0px 0px 0px,rgba(0, 0, 0, 0.05) 0px 0px 0px 1px,rgba(0, 0, 0, 0.1) 0px 10px 15px -3px,rgba(0, 0, 0, 0.05) 0px 4px 6px -2px;}.css-yvxbj .MuiPaper-root .MuiMenu-list{padding:4px 0;}.css-yvxbj .MuiPaper-root .MuiMenuItem-root .MuiSvgIcon-root{font-size:18px;color:rgba(0, 0, 0, 0.6);margin-right:12px;}.css-yvxbj .MuiPaper-root .MuiMenuItem-root:active{background-color:rgba(25, 118, 210, 0.08);}</style><style data-emotion="css oe3wem">.css-oe3wem .MuiPaper-root{border-radius:6px;margin-top:8px;min-width:268px;color:rgb(55, 65, 81);box-shadow:rgb(255, 255, 255) 0px 0px 0px 0px,rgba(0, 0, 0, 0.05) 0px 0px 0px 1px,rgba(0, 0, 0, 0.1) 0px 10px 15px -3px,rgba(0, 0, 0, 0.05) 0px 4px 6px -2px;}.css-oe3wem .MuiPaper-root .MuiMenu-list{padding:4px 0;}.css-oe3wem .MuiPaper-root .MuiMenuItem-root .MuiSvgIcon-root{font-size:18px;color:rgba(0, 0, 0, 0.6);margin-right:12px;}.css-oe3wem .MuiPaper-root .MuiMenuItem-root:active{background-color:rgba(25, 118, 210, 0.08);}</style><style data-emotion="css 12mehxg">.css-12mehxg{padding:0;margin:0;list-style:none;outline:0;}</style><ul role="tree" id="left-nav-treeview" aria-multiselectable="false" class="MuiTreeView-root css-12mehxg" tabindex="0" aria-label="left navigation"><style data-emotion="css 1gesgke">.css-1gesgke .MuiTreeItem-content{color:#282a36;border-radius:4px;}.css-1gesgke .MuiTreeItem-content:hover{background-color:#f9f9f9;}.css-1gesgke .MuiTreeItem-content.Mui-selected,.css-1gesgke .MuiTreeItem-content.Mui-selected.Mui-focused{background-color:var(--tree-view-bg-color, #EAF6FB);color:var(--tree-view-color, #0A85C2);}.css-1gesgke .MuiTreeItem-content.Mui-selected svg.MuiTreeItem-ChevronRightIcon,.css-1gesgke .MuiTreeItem-content.Mui-selected.Mui-focused svg.MuiTreeItem-ChevronRightIcon{fill:var(--tree-view-color, #0A85C2);}.css-1gesgke .MuiTreeItem-content.Mui-focused{background-color:#f9f9f9;}.css-1gesgke .MuiTreeItem-content .MuiTreeItem-label{font-weight:inherit;color:inherit;}.css-1gesgke .MuiTreeItem-content .MuiTreeItem-iconContainer{;}.css-1gesgke .MuiTreeItem-group{margin-left:0;}.css-1gesgke .MuiTreeItem-group .MuiTreeItem-content{padding-left:16px;}</style><style data-emotion="css 1oy5rnm">.css-1oy5rnm{list-style:none;margin:0;padding:0;outline:0;}.css-1oy5rnm .MuiTreeItem-content{color:#282a36;border-radius:4px;}.css-1oy5rnm .MuiTreeItem-content:hover{background-color:#f9f9f9;}.css-1oy5rnm .MuiTreeItem-content.Mui-selected,.css-1oy5rnm .MuiTreeItem-content.Mui-selected.Mui-focused{background-color:var(--tree-view-bg-color, #EAF6FB);color:var(--tree-view-color, #0A85C2);}.css-1oy5rnm .MuiTreeItem-content.Mui-selected svg.MuiTreeItem-ChevronRightIcon,.css-1oy5rnm .MuiTreeItem-content.Mui-selected.Mui-focused svg.MuiTreeItem-ChevronRightIcon{fill:var(--tree-view-color, #0A85C2);}.css-1oy5rnm .MuiTreeItem-content.Mui-focused{background-color:#f9f9f9;}.css-1oy5rnm .MuiTreeItem-content .MuiTreeItem-label{font-weight:inherit;color:inherit;}.css-1oy5rnm .MuiTreeItem-content .MuiTreeItem-iconContainer{;}.css-1oy5rnm .MuiTreeItem-group{margin-left:0;}.css-1oy5rnm .MuiTreeItem-group .MuiTreeItem-content{padding-left:16px;}</style><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-0" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><style data-emotion="css khel7y">.css-khel7y{padding:0 8px;width:100%;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;cursor:pointer;-webkit-tap-highlight-color:transparent;}.css-khel7y:hover{background-color:rgba(0, 0, 0, 0.04);}@media (hover: none){.css-khel7y:hover{background-color:transparent;}}.css-khel7y.Mui-disabled{opacity:0.38;background-color:transparent;}.css-khel7y.Mui-focused{background-color:rgba(0, 0, 0, 0.12);}.css-khel7y.Mui-selected{background-color:rgba(25, 118, 210, 0.08);}.css-khel7y.Mui-selected:hover{background-color:rgba(25, 118, 210, 0.12);}@media (hover: none){.css-khel7y.Mui-selected:hover{background-color:rgba(25, 118, 210, 0.08);}}.css-khel7y.Mui-selected.Mui-focused{background-color:rgba(25, 118, 210, 0.2);}.css-khel7y .MuiTreeItem-iconContainer{margin-right:4px;width:15px;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;-webkit-box-pack:center;-ms-flex-pack:center;-webkit-justify-content:center;justify-content:center;}.css-khel7y .MuiTreeItem-iconContainer svg{font-size:18px;}.css-khel7y .MuiTreeItem-label{width:100%;min-width:0;padding-left:4px;position:relative;font-size:1rem;line-height:1.5rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;}</style><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><style data-emotion="css znl8a3">.css-znl8a3{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:row;-ms-flex-direction:row;flex-direction:row;min-height:1.75rem;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;padding-left:0rem;padding-top:0.25rem;padding-bottom:0.25rem;}</style><div class="css-znl8a3"><style data-emotion="css tx8jsd">.css-tx8jsd{margin:0;font-size:1rem;line-height:1.5rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;}</style><a class="MuiTypography-root MuiTypography-body1 css-tx8jsd" target="_blank" href="https://docs.pingcap.com/zh" style="text-decoration:none;width:100%;color:inherit"><style data-emotion="css 8atqhb">.css-8atqhb{width:100%;}</style><div class="MuiBox-root css-8atqhb"><style data-emotion="css 1hwyipb">.css-1hwyipb{margin:0;font-size:1rem;line-height:1.5rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;color:inherit;font-size:0.875rem;line-height:1.25rem;}</style><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">文档中心</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-1" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">关于 TiDB</div></div><style data-emotion="css xjq79n">.css-xjq79n{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;width:1em;height:1em;display:inline-block;fill:currentColor;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;-webkit-transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;font-size:1.5rem;fill:#999999;height:1rem;width:1rem;margin-left:auto;-webkit-transform:none;-moz-transform:none;-ms-transform:none;transform:none;}</style><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div><style data-emotion="css 1jozaee">.css-1jozaee{margin:0;padding:0;margin-left:17px;}</style></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-2" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">快速上手</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-3" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">应用开发</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-4" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">部署标准集群</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-5" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">数据迁移</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-6" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">数据集成</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-7" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">运维操作</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-8" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">监控与告警</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-9" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">故障诊断</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-10" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">性能调优</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-11" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">教程</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-12" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">TiDB 工具</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="true" id="left-nav-treeview-0-13" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content Mui-expanded" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">参考指南</div></div><style data-emotion="css 171pefp">.css-171pefp{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;width:1em;height:1em;display:inline-block;fill:currentColor;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;-webkit-transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;font-size:1.5rem;fill:#999999;height:1rem;width:1rem;margin-left:auto;-webkit-transform:rotate(90deg);-moz-transform:rotate(90deg);-ms-transform:rotate(90deg);transform:rotate(90deg);}</style><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-171pefp" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div><style data-emotion="css 1xxsnna">.css-1xxsnna{height:auto;overflow:visible;-webkit-transition:height 300ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:height 300ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;margin:0;padding:0;margin-left:17px;}</style><ul class="MuiCollapse-root MuiCollapse-vertical MuiTreeItem-group MuiCollapse-entered css-1xxsnna" style="min-height:0px" role="group"><div class="MuiCollapse-wrapper MuiCollapse-vertical css-hboir5"><div class="MuiCollapse-wrapperInner MuiCollapse-vertical css-8atqhb"><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-13-0" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><style data-emotion="css kb2j4b">.css-kb2j4b{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:row;-ms-flex-direction:row;flex-direction:row;min-height:1.75rem;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;padding-left:0.5rem;padding-top:0.25rem;padding-bottom:0.25rem;}</style><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">架构</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-13-1" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">存储引擎 TiKV</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-13-2" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">存储引擎 TiFlash</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-3" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/system-variables"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">系统变量</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-13-4" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">配置文件参数</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-13-5" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">CLI</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-13-6" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">命令行参数</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-13-7" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">监控指标</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-13-8" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">安全加固</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-13-9" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">权限</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="true" id="left-nav-treeview-0-13-10" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content Mui-expanded" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">SQL</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-171pefp" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div><ul class="MuiCollapse-root MuiCollapse-vertical MuiTreeItem-group MuiCollapse-entered css-1xxsnna" style="min-height:0px" role="group"><div class="MuiCollapse-wrapper MuiCollapse-vertical css-hboir5"><div class="MuiCollapse-wrapperInner MuiCollapse-vertical css-8atqhb"><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-13-10-0" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><style data-emotion="css snygwd">.css-snygwd{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:row;-ms-flex-direction:row;flex-direction:row;min-height:1.75rem;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;padding-left:1rem;padding-top:0.25rem;padding-bottom:0.25rem;}</style><div class="css-snygwd"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">SQL 语言结构和语法</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-13-10-1" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-snygwd"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">SQL 语句</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-13-10-2" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-snygwd"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">数据类型</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="true" id="left-nav-treeview-0-13-10-3" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content Mui-expanded" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-snygwd"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">函数与操作符</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-171pefp" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div><ul class="MuiCollapse-root MuiCollapse-vertical MuiTreeItem-group MuiCollapse-entered css-1xxsnna" style="min-height:0px" role="group"><div class="MuiCollapse-wrapper MuiCollapse-vertical css-hboir5"><div class="MuiCollapse-wrapperInner MuiCollapse-vertical css-8atqhb"><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-3-0" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><style data-emotion="css 5fc025">.css-5fc025{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:row;-ms-flex-direction:row;flex-direction:row;min-height:1.75rem;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;padding-left:1.5rem;padding-top:0.25rem;padding-bottom:0.25rem;}</style><div class="css-5fc025"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/functions-and-operators-overview"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">函数与操作符概述</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-3-1" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-5fc025"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/type-conversion-in-expression-evaluation"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">表达式求值的类型转换</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-3-2" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-5fc025"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/operators"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">操作符</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-3-3" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-5fc025"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/control-flow-functions"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">控制流程函数</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-3-4" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content Mui-expanded" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-5fc025"><a aria-current="page" style="text-decoration:none;width:100%;color:inherit" class="" href="/zh/tidb/stable/string-functions"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">字符串函数</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-3-5" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-5fc025"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/numeric-functions-and-operators"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">数值函数与操作符</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-3-6" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-5fc025"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/date-and-time-functions"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">日期和时间函数</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-3-7" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-5fc025"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/bit-functions-and-operators"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">位函数和操作符</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-3-8" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-5fc025"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/cast-functions-and-operators"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">Cast 函数和操作符</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-3-9" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-5fc025"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/encryption-and-compression-functions"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">加密和压缩函数</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-3-10" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-5fc025"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/locking-functions"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">锁函数</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-3-11" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-5fc025"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/information-functions"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">信息函数</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-3-12" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-5fc025"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/json-functions"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">JSON 函数</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-3-13" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-5fc025"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/aggregate-group-by-functions"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">GROUP BY 聚合函数</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-3-14" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-5fc025"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/window-functions"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">窗口函数</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-3-15" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-5fc025"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/miscellaneous-functions"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">其它函数</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-3-16" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-5fc025"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/precision-math"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">精度数学</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-3-17" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-5fc025"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/set-operators"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">集合运算</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-3-18" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-5fc025"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/expressions-pushed-down"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">下推到 TiKV 的表达式列表</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-3-19" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-5fc025"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/tidb-functions"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">TiDB 特有的函数</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-3-20" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-5fc025"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/oracle-functions-to-tidb"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">Oracle 与 TiDB 函数和语法差异对照</div></div></a></div></div></div></li></div></div></ul></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-4" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-snygwd"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/clustered-indexes"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">聚簇索引</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-5" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-snygwd"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/constraints"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">约束</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-6" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-snygwd"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/generated-columns"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">生成列</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-7" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-snygwd"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/sql-mode"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">SQL 模式</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-8" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-snygwd"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/table-attributes"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">表属性</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-13-10-9" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-snygwd"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">事务</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-10" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-snygwd"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/views"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">视图</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-11" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-snygwd"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/partitioned-table"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">分区表</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-12" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-snygwd"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/temporary-tables"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">临时表</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-13" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-snygwd"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/cached-tables"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">缓存表</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-14" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-snygwd"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/foreign-key"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">外键约束</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-13-10-15" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-snygwd"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">字符集和排序</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-16" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-snygwd"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/placement-rules-in-sql"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">Placement Rules in SQL</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-13-10-17" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-snygwd"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">系统表</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-10-18" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-snygwd"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/metadata-lock"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">元数据锁</div></div></a></div></div></div></li></div></div></ul></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-13-11" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">UI</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-12" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/telemetry"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">遥测</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-13" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/error-codes"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">错误码</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-13-14" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/schedule-replicas-by-topology-labels"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">通过拓扑 label 进行副本调度</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-13-15" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">内部组件介绍</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li></div></div></ul></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-14" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">常见问题解答 (FAQ)</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-15" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">版本发布历史</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-16" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/glossary"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">术语表</div></div></a></div></div></div></li></ul></div></aside><style data-emotion="css sb2sd0">.css-sb2sd0{width:100%;}@media (min-width:1200px){.css-sb2sd0{max-width:calc(100% - 18.75rem);}}</style><main class="MuiBox-root css-sb2sd0"><style data-emotion="css 1rnnmjb">.css-1rnnmjb{max-width:1340px;width:100%;margin-left:auto;margin-right:auto;display:block;box-sizing:border-box;}</style><div class="MuiBox-root css-1rnnmjb"><style data-emotion="css 90fn5w">.css-90fn5w{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:column;-ms-flex-direction:column;flex-direction:column;}@media (min-width:0px){.css-90fn5w{-webkit-flex-direction:column-reverse;-ms-flex-direction:column-reverse;flex-direction:column-reverse;}}@media (min-width:600px){.css-90fn5w{-webkit-flex-direction:row;-ms-flex-direction:row;flex-direction:row;}}</style><div class="css-90fn5w"><style data-emotion="css vofosd">.css-vofosd{padding:1.5rem 0;}@media (min-width:0px){.css-vofosd{width:100%;}}@media (min-width:600px){.css-vofosd{width:calc(100% - 17.5rem);}}</style><div class="MuiBox-root css-vofosd"><style data-emotion="css 1ekb41w">.css-1ekb41w{width:100%;margin-left:auto;box-sizing:border-box;margin-right:auto;display:block;padding-left:16px;padding-right:16px;}@media (min-width:600px){.css-1ekb41w{padding-left:24px;padding-right:24px;}}@media (min-width:1536px){.css-1ekb41w{max-width:1536px;}}</style><div class="MuiContainer-root MuiContainer-maxWidthXl doc-content css-1ekb41w"><div class="markdown-body MuiBox-root css-0"><h1 id="字符串函数" style="position:relative"><a href="#%E5%AD%97%E7%AC%A6%E4%B8%B2%E5%87%BD%E6%95%B0" aria-label="字符串函数 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>字符串函数</h1><p>TiDB 支持使用大部分 MySQL 5.7 中提供的<a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html" target="_blank" referrerpolicy="no-referrer-when-downgrade">字符串函数</a>、一部分 MySQL 8.0 中提供的<a href="https://dev.mysql.com/doc/refman/8.0/en/string-functions.html" target="_blank" referrerpolicy="no-referrer-when-downgrade">字符串函数</a>和一部分 Oracle 21 所提供的<a href="https://docs.oracle.com/en/database/oracle/oracle-database/21/sqlqr/SQL-Functions.html#GUID-93EC62F8-415D-4A7E-B050-5D5B2C127009" target="_blank" referrerpolicy="no-referrer-when-downgrade">函数</a>。</p><p>关于 Oracle 函数和 TiDB 函数的对照关系，请参考 <a href="/zh/tidb/stable/oracle-functions-to-tidb">Oracle 与 TiDB 函数和语法差异对照</a>。</p><h2 id="支持的函数" style="position:relative"><a href="#%E6%94%AF%E6%8C%81%E7%9A%84%E5%87%BD%E6%95%B0" aria-label="支持的函数 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>支持的函数</h2><table><thead><tr><th align="left">函数名</th><th align="left">功能描述</th></tr></thead><tbody><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_ascii" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>ASCII()</code></a></td><td align="left">返回最左字符的数值</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_bin" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>BIN()</code></a></td><td align="left">返回一个数的二进制值的字符串表示</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_bit-length" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>BIT_LENGTH()</code></a></td><td align="left">返回字符串的位长度</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_char" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>CHAR()</code></a> </td><td align="left">返回由整数的代码值所给出的字符组成的字符串</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_char-length" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>CHAR_LENGTH()</code></a></td><td align="left">返回字符串的字符长度</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_character-length" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>CHARACTER_LENGTH()</code></a></td><td align="left">与 <code>CHAR_LENGTH()</code> 功能相同</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_concat" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>CONCAT()</code></a></td><td align="left">返回连接的字符串</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_concat-ws" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>CONCAT_WS()</code></a></td><td align="left">返回由分隔符连接的字符串</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_elt" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>ELT()</code></a></td><td align="left">返回指定位置的字符串</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_export-set" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>EXPORT_SET()</code></a></td><td align="left">返回一个字符串，其中值位中设置的每个位，可以得到一个 on 字符串，而每个未设置的位，可以得到一个 off 字符串</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_field" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>FIELD()</code></a></td><td align="left">返回参数在后续参数中出现的第一个位置</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_find-in-set" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>FIND_IN_SET()</code></a></td><td align="left">返回第一个参数在第二个参数中出现的位置</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_format" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>FORMAT()</code></a></td><td align="left">返回指定小数位数格式的数字</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_from-base64" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>FROM_BASE64()</code></a></td><td align="left">解码 base-64 表示的字符串，并返回结果</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_hex" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>HEX()</code></a></td><td align="left">返回一个十进制数或字符串值的 16 进制表示</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_insert" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>INSERT()</code></a></td><td align="left">在指定位置插入一个子字符串，最多不超过指定字符数</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_instr" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>INSTR()</code></a></td><td align="left">返回第一次出现的子字符串的索引</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_lcase" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>LCASE()</code></a></td><td align="left">与 <code>LOWER()</code> 功能相同</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_left" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>LEFT()</code></a></td><td align="left">返回最左侧指定长度的字符</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_length" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>LENGTH()</code></a></td><td align="left">返回字符串长度，单位为字节</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-comparison-functions.html#operator_like" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>LIKE</code></a></td><td align="left">进行简单模式匹配</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_locate" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>LOCATE()</code></a></td><td align="left">返回第一次出现的子字符串的位置</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_lower" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>LOWER()</code></a></td><td align="left">返回全小写的参数</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_lpad" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>LPAD()</code></a></td><td align="left">返回字符串参数，左侧添加指定字符串</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_ltrim" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>LTRIM()</code></a></td><td align="left">去掉前缀空格</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_make-set" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>MAKE_SET()</code></a></td><td align="left">返回一组用逗号分隔的字符串，这些字符串的位数与给定的 bits 参数对应</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_mid" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>MID()</code></a></td><td align="left">返回一个以指定位置开始的子字符串</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-comparison-functions.html#operator_not-like" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>NOT LIKE</code></a></td><td align="left">否定简单模式匹配</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/regexp.html#operator_not-regexp" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>NOT REGEXP</code></a></td><td align="left"><code>REGEXP</code> 的否定形式</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_oct" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>OCT()</code></a></td><td align="left">返回一个数值的八进制表示，形式为字符串</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_octet-length" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>OCTET_LENGTH()</code></a></td><td align="left">与 <code>LENGTH()</code> 功能相同</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_ord" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>ORD()</code></a></td><td align="left">返回该参数最左侧字符的字符编码</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_position" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>POSITION()</code></a></td><td align="left">与 <code>LOCATE()</code> 功能相同</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_quote" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>QUOTE()</code></a></td><td align="left">使参数逃逸，为了在 SQL 语句中使用</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/regexp.html#operator_regexp" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>REGEXP</code></a></td><td align="left">使用正则表达式匹配模式</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/8.0/en/regexp.html#function_regexp-instr" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>REGEXP_INSTR()</code></a></td><td align="left">返回满足正则的子字符串的第一个索引位置（与 MySQL 不完全兼容，具体请参考<a href="#%E6%AD%A3%E5%88%99%E5%87%BD%E6%95%B0%E4%B8%8E-mysql-%E7%9A%84%E5%85%BC%E5%AE%B9%E6%80%A7">正则函数与 MySQL 的兼容性</a>）</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/8.0/en/regexp.html#function_regexp-like" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>REGEXP_LIKE()</code></a></td><td align="left">判断字符串是否满足正则表达式（与 MySQL 不完全兼容，具体请参考<a href="#%E6%AD%A3%E5%88%99%E5%87%BD%E6%95%B0%E4%B8%8E-mysql-%E7%9A%84%E5%85%BC%E5%AE%B9%E6%80%A7">正则函数与 MySQL 的兼容性</a>）</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/8.0/en/regexp.html#function_regexp-replace" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>REGEXP_REPLACE()</code></a></td><td align="left">替换满足正则表达式的子字符串（与 MySQL 不完全兼容，具体请参考<a href="#%E6%AD%A3%E5%88%99%E5%87%BD%E6%95%B0%E4%B8%8E-mysql-%E7%9A%84%E5%85%BC%E5%AE%B9%E6%80%A7">正则函数与 MySQL 的兼容性</a>）</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/8.0/en/regexp.html#function_regexp-substr" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>REGEXP_SUBSTR()</code></a></td><td align="left">返回满足正则表达式的子字符串（与 MySQL 不完全兼容，具体请参考<a href="#%E6%AD%A3%E5%88%99%E5%87%BD%E6%95%B0%E4%B8%8E-mysql-%E7%9A%84%E5%85%BC%E5%AE%B9%E6%80%A7">正则函数与 MySQL 的兼容性</a>）</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_repeat" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>REPEAT()</code></a></td><td align="left">以指定次数重复一个字符串</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_replace" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>REPLACE()</code></a></td><td align="left">替换所有出现的指定字符串</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_reverse" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>REVERSE()</code></a></td><td align="left">反转字符串里的所有字符</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_right" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>RIGHT()</code></a></td><td align="left">返回指定数量的最右侧的字符</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/regexp.html#operator_regexp" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>RLIKE</code></a></td><td align="left">与 <code>REGEXP</code> 功能相同</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_rpad" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>RPAD()</code></a></td><td align="left">以指定次数添加字符串</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_rtrim" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>RTRIM()</code></a></td><td align="left">去掉后缀空格</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_space" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>SPACE()</code></a></td><td align="left">返回指定数量的空格，形式为字符串</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-comparison-functions.html#function_strcmp" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>STRCMP()</code></a></td><td align="left">比较两个字符串</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_substr" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>SUBSTR()</code></a></td><td align="left">返回指定的子字符串</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_substring" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>SUBSTRING()</code></a></td><td align="left">返回指定的子字符串</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_substring-index" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>SUBSTRING_INDEX()</code></a></td><td align="left">从一个字符串中返回指定出现次数的定界符之前的子字符串</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_to-base64" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>TO_BASE64()</code></a></td><td align="left">返回转化为 base-64 表示的字符串参数</td></tr><tr><td align="left"><a href="https://docs.oracle.com/en/database/oracle/oracle-database/21/sqlrf/TRANSLATE.html#GUID-80F85ACB-092C-4CC7-91F6-B3A585E3A690" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>TRANSLATE()</code></a></td><td align="left">将字符串中出现的所有指定字符替换为其它字符。这个函数不会像 Oracle 一样将空字符串视为<code>NULL</code></td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_trim" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>TRIM()</code></a></td><td align="left">去掉前缀和后缀空格</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_ucase" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>UCASE()</code></a></td><td align="left">与 <code>UPPER()</code> 功能相同</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_unhex" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>UNHEX()</code></a></td><td align="left">返回一个数的十六进制表示，形式为字符串</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_upper" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>UPPER()</code></a></td><td align="left">参数转换为大写形式</td></tr><tr><td align="left"><a href="https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_weight-string" target="_blank" referrerpolicy="no-referrer-when-downgrade"><code>WEIGHT_STRING()</code></a></td><td align="left">返回字符串的权重</td></tr></tbody></table><h2 id="不支持的函数" style="position:relative"><a href="#%E4%B8%8D%E6%94%AF%E6%8C%81%E7%9A%84%E5%87%BD%E6%95%B0" aria-label="不支持的函数 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>不支持的函数</h2><ul><li><code>LOAD_FILE()</code></li><li><code>MATCH()</code></li><li><code>SOUNDEX()</code></li></ul><h2 id="正则函数与-mysql-的兼容性" style="position:relative"><a href="#%E6%AD%A3%E5%88%99%E5%87%BD%E6%95%B0%E4%B8%8E-mysql-%E7%9A%84%E5%85%BC%E5%AE%B9%E6%80%A7" aria-label="正则函数与 mysql 的兼容性 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>正则函数与 MySQL 的兼容性</h2><p>本节介绍 TiDB 中正则函数 <code>REGEXP_INSTR()</code>、<code>REGEXP_LIKE()</code>、<code>REGEXP_REPLACE()</code>、<code>REGEXP_SUBSTR()</code> 与 MySQL 的兼容情况。</p><h3 id="语法兼容性" style="position:relative"><a href="#%E8%AF%AD%E6%B3%95%E5%85%BC%E5%AE%B9%E6%80%A7" aria-label="语法兼容性 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>语法兼容性</h3><p>MySQL 的实现使用的是 <a href="https://github.com/unicode-org/icu" target="_blank" referrerpolicy="no-referrer-when-downgrade">ICU</a> (International Components for Unicode) 库，TiDB 的实现使用的是 <a href="https://github.com/google/re2" target="_blank" referrerpolicy="no-referrer-when-downgrade">RE2</a> 库，两个库之间的语法差异可以查阅 <a href="https://unicode-org.github.io/icu/userguide/" target="_blank" referrerpolicy="no-referrer-when-downgrade">ICU 文档</a>和 <a href="https://github.com/google/re2/wiki/Syntax" target="_blank" referrerpolicy="no-referrer-when-downgrade">RE2 文档</a>。</p><h3 id="匹配模式-match_type-兼容性" style="position:relative"><a href="#%E5%8C%B9%E9%85%8D%E6%A8%A1%E5%BC%8F-match_type-%E5%85%BC%E5%AE%B9%E6%80%A7" aria-label="匹配模式 match_type 兼容性 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>匹配模式 <code>match_type</code> 兼容性</h3><p>TiDB 与 MySQL 在 <code>match_type</code> 上的差异：</p><ul><li><p>TiDB 中 <code>match_type</code> 可选值为：<code>"c"</code>、<code>"i"</code>、<code>"m"</code>、<code>"s"</code>。MySQL 中 <code>match_type</code> 可选值为：<code>"c"</code>、<code>"i"</code>、<code>"m"</code>、<code>"n"</code>、<code>"u"</code>。</p></li><li><p>TiDB 中 <code>"s"</code> 对应 MySQL 中的 <code>"n"</code>，即 <code>.</code> 字符匹配行结束符。</p><p> 例如：MySQL 中 <code>SELECT REGEXP_LIKE(a, b, "n") FROM t1;</code> 在 TiDB 中需要修改为 <code>SELECT REGEXP_LIKE(a, b, "s") FROM t1;</code>。</p></li><li><p>TiDB 不支持 <code>match_type</code> 为 <code>"u"</code>。</p></li></ul><h3 id="数据类型兼容性" style="position:relative"><a href="#%E6%95%B0%E6%8D%AE%E7%B1%BB%E5%9E%8B%E5%85%BC%E5%AE%B9%E6%80%A7" aria-label="数据类型兼容性 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>数据类型兼容性</h3><p>TiDB 与 MySQL 在二进制字符串 (binary string) 数据类型上的差异：</p><ul><li>MySQL 8.0.22 及以上版本中正则函数不支持二进制字符串，具体信息可查看 <a href="https://dev.mysql.com/doc/refman/8.0/en/regexp.html" target="_blank" referrerpolicy="no-referrer-when-downgrade">MySQL 文档</a>。但在实际使用过程中，如果所有参数或者返回值的数据类型都是二进制字符串，则正则函数可以正常使用，否则报错。</li><li>TiDB 目前完全禁止使用二进制字符串，无论什么情况都会报错。</li></ul><h3 id="其它兼容性" style="position:relative"><a href="#%E5%85%B6%E5%AE%83%E5%85%BC%E5%AE%B9%E6%80%A7" aria-label="其它兼容性 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>其它兼容性</h3><p>TiDB 与 MySQL 在替换空字符串上的差异：</p><p>下面以 <code>REGEXP_REPLACE("", "^$", "123")</code> 为例：</p><ul><li>MySQL 不会对空串进行替换，其结果为 <code>""</code>。</li><li>TiDB 会对空串进行替换，其结果为 <code>"123"</code>。</li></ul></div></div></div><style data-emotion="css 11q09s7">.css-11q09s7{width:17.5rem;}@media (min-width:0px){.css-11q09s7{;}}@media (min-width:600px){.css-11q09s7{display:block;}}</style><div class="MuiBox-root css-11q09s7"><style data-emotion="css nljo0q">.css-nljo0q{position:-webkit-sticky;position:sticky;top:5rem;height:100%;max-height:calc(100vh - 5rem);overflow-y:auto;padding-left:1rem;padding-right:1rem;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:column;-ms-flex-direction:column;flex-direction:column;}</style><div class="MuiBox-root css-nljo0q"><style data-emotion="css 7gtni6">.css-7gtni6{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:column;-ms-flex-direction:column;flex-direction:column;padding:2rem 0.5rem 1rem 0.5rem;}.css-7gtni6&gt;:not(style)+:not(style){margin:0;margin-top:8px;}</style><div class="css-7gtni6"><style data-emotion="css w6413i">.css-w6413i{margin:0;font-size:1rem;line-height:1.5rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;width:-webkit-fit-content;width:-moz-fit-content;width:fit-content;-webkit-text-decoration:none;text-decoration:none;font-size:14px;line-height:1.25rem;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;gap:0.25rem;}.css-w6413i:hover,.css-w6413i:focus,.css-w6413i:active{color:#0A85C2;}</style><a class="MuiTypography-root MuiTypography-body1 css-w6413i" href="https://download.pingcap.org/tidb-stable-zh-manual.pdf" target="_blank" icon="[object Object]" rel="noreferrer" download=""><style data-emotion="css 1dzhlmu">.css-1dzhlmu{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;width:1em;height:1em;display:inline-block;fill:currentColor;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;-webkit-transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;font-size:1.5rem;width:1.25rem;height:1.25rem;}</style><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-1dzhlmu" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="SimCardDownloadIcon"><path d="M18 2h-8L4 8v12c0 1.1.9 2 2 2h12c1.1 0 2-.9 2-2V4c0-1.1-.9-2-2-2zm-6 15-4-4h3V9.02L13 9v4h3l-4 4z"/></svg>下载 PDF</a><a class="MuiTypography-root MuiTypography-body1 css-w6413i" href="https://github.com/pingcap/docs-cn/issues/new?body=File:%20[/release-7.1/functions-and-operators/string-functions.md](https://docs.pingcap.com/zh/tidb/stable/string-functions)" target="_blank" icon="[object Object]" rel="noreferrer"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-1dzhlmu" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="GitHubIcon"><path d="M12 1.27a11 11 0 00-3.48 21.46c.55.09.73-.28.73-.55v-1.84c-3.03.64-3.67-1.46-3.67-1.46-.55-1.29-1.28-1.65-1.28-1.65-.92-.65.1-.65.1-.65 1.1 0 1.73 1.1 1.73 1.1.92 1.65 2.57 1.2 3.21.92a2 2 0 01.64-1.47c-2.47-.27-5.04-1.19-5.04-5.5 0-1.1.46-2.1 1.2-2.84a3.76 3.76 0 010-2.93s.91-.28 3.11 1.1c1.8-.49 3.7-.49 5.5 0 2.1-1.38 3.02-1.1 3.02-1.1a3.76 3.76 0 010 2.93c.83.74 1.2 1.74 1.2 2.94 0 4.21-2.57 5.13-5.04 5.4.45.37.82.92.82 2.02v3.03c0 .27.1.64.73.55A11 11 0 0012 1.27"/></svg>文档反馈</a><a class="MuiTypography-root MuiTypography-body1 css-w6413i" href="https://asktug.com/?utm_source=doc" target="_blank" icon="[object Object]" rel="noreferrer"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-1dzhlmu" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="QuestionAnswerIcon"><path d="M21 6h-2v9H6v2c0 .55.45 1 1 1h11l4 4V7c0-.55-.45-1-1-1zm-4 6V3c0-.55-.45-1-1-1H3c-.55 0-1 .45-1 1v14l4-4h10c.55 0 1-.45 1-1z"/></svg>社区交流</a></div><style data-emotion="css nyz3gr">.css-nyz3gr{padding-top:1rem;padding-bottom:2rem;}</style><nav class="MuiBox-root css-nyz3gr" id="toc-container" aria-label="toc"><style data-emotion="css tucxab">.css-tucxab{margin:0;font-size:1rem;line-height:1.5rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;color:#282a36;padding-left:0.5rem;font-family:Helvetica Neue;font-size:0.875rem;font-weight:700;line-height:1.25rem;padding-bottom:0.5rem;}</style><div class="MuiTypography-root MuiTypography-body1 css-tucxab">本页导航</div><style data-emotion="css qoh4zo">.css-qoh4zo{margin:0;font-size:1rem;line-height:1.5rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;list-style:none;padding:0px;}</style><ul class="MuiTypography-root MuiTypography-body1 css-qoh4zo"><li class="MuiTypography-root MuiTypography-body1 css-tx8jsd"><style data-emotion="css swx9es">.css-swx9es{margin:0;font-size:1rem;line-height:1.5rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-text-decoration:none;text-decoration:none;font-size:14px;line-height:1.25rem;border-left:1px solid transparent;padding-left:0.5rem;padding-top:0.25rem;padding-bottom:0.25rem;}.css-swx9es:hover{color:#999999;border-left:1px solid #999999;}</style><a class="MuiTypography-root MuiTypography-body1 css-swx9es" href="#支持的函数">支持的函数</a></li><li class="MuiTypography-root MuiTypography-body1 css-tx8jsd"><a class="MuiTypography-root MuiTypography-body1 css-swx9es" href="#不支持的函数">不支持的函数</a></li><li class="MuiTypography-root MuiTypography-body1 css-tx8jsd"><a class="MuiTypography-root MuiTypography-body1 css-swx9es" href="#正则函数与-mysql-的兼容性">正则函数与 MySQL 的兼容性</a><ul class="MuiTypography-root MuiTypography-body1 css-qoh4zo"><li class="MuiTypography-root MuiTypography-body1 css-tx8jsd"><style data-emotion="css o4rcgq">.css-o4rcgq{margin:0;font-size:1rem;line-height:1.5rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-text-decoration:none;text-decoration:none;font-size:14px;line-height:1.25rem;border-left:1px solid transparent;padding-left:1.5rem;padding-top:0.25rem;padding-bottom:0.25rem;}.css-o4rcgq:hover{color:#999999;border-left:1px solid #999999;}</style><a class="MuiTypography-root MuiTypography-body1 css-o4rcgq" href="#语法兼容性">语法兼容性</a></li><li class="MuiTypography-root MuiTypography-body1 css-tx8jsd"><a class="MuiTypography-root MuiTypography-body1 css-o4rcgq" href="#匹配模式-match_type-兼容性">匹配模式 match_type 兼容性</a></li><li class="MuiTypography-root MuiTypography-body1 css-tx8jsd"><a class="MuiTypography-root MuiTypography-body1 css-o4rcgq" href="#数据类型兼容性">数据类型兼容性</a></li><li class="MuiTypography-root MuiTypography-body1 css-tx8jsd"><a class="MuiTypography-root MuiTypography-body1 css-o4rcgq" href="#其它兼容性">其它兼容性</a></li></ul></li></ul></nav></div></div><style data-emotion="css kpren5">.css-kpren5{padding:1rem;}@media (min-width:600px){.css-kpren5{;}}</style><div class="MuiBox-root css-kpren5"><div class="MuiBox-root css-0"><style data-emotion="css 1ea16oy">.css-1ea16oy{text-transform:none;font-family:-apple-system,"Poppins","Helvetica Neue",sans-serif,"Noto Sans","Fira Code","IBM Plex Sans","sans-serif";font-weight:500;font-size:0.875rem;line-height:1.75;min-width:64px;padding:5px 15px;border-radius:4px;-webkit-transition:background-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,border-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:background-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,border-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;border:1px solid rgba(25, 118, 210, 0.5);color:#1976d2;width:100%;}.css-1ea16oy:hover{-webkit-text-decoration:none;text-decoration:none;background-color:rgba(25, 118, 210, 0.04);border:1px solid #1976d2;}@media (hover: none){.css-1ea16oy:hover{background-color:transparent;}}.css-1ea16oy.Mui-disabled{color:rgba(0, 0, 0, 0.26);border:1px solid rgba(0, 0, 0, 0.12);}</style><style data-emotion="css 1eluyo9">.css-1eluyo9{display:-webkit-inline-box;display:-webkit-inline-flex;display:-ms-inline-flexbox;display:inline-flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-ms-flex-pack:center;-webkit-justify-content:center;justify-content:center;position:relative;box-sizing:border-box;-webkit-tap-highlight-color:transparent;background-color:transparent;outline:0;border:0;margin:0;border-radius:0;padding:0;cursor:pointer;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;vertical-align:middle;-moz-appearance:none;-webkit-appearance:none;-webkit-text-decoration:none;text-decoration:none;color:inherit;text-transform:none;font-family:-apple-system,"Poppins","Helvetica Neue",sans-serif,"Noto Sans","Fira Code","IBM Plex Sans","sans-serif";font-weight:500;font-size:0.875rem;line-height:1.75;min-width:64px;padding:5px 15px;border-radius:4px;-webkit-transition:background-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,border-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:background-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,border-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;border:1px solid rgba(25, 118, 210, 0.5);color:#1976d2;width:100%;}.css-1eluyo9::-moz-focus-inner{border-style:none;}.css-1eluyo9.Mui-disabled{pointer-events:none;cursor:default;}@media print{.css-1eluyo9{-webkit-print-color-adjust:exact;color-adjust:exact;}}.css-1eluyo9:hover{-webkit-text-decoration:none;text-decoration:none;background-color:rgba(25, 118, 210, 0.04);border:1px solid #1976d2;}@media (hover: none){.css-1eluyo9:hover{background-color:transparent;}}.css-1eluyo9.Mui-disabled{color:rgba(0, 0, 0, 0.26);border:1px solid rgba(0, 0, 0, 0.12);}</style><button class="MuiButtonBase-root MuiButton-root MuiButton-outlined MuiButton-outlinedPrimary MuiButton-sizeMedium MuiButton-outlinedSizeMedium css-1eluyo9" tabindex="0" type="button" id="toc-mobile-button" aria-haspopup="true">本页导航<span class="MuiButton-endIcon MuiButton-iconSizeMedium css-1n4a93h"><style data-emotion="css vubbuv">.css-vubbuv{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;width:1em;height:1em;display:inline-block;fill:currentColor;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;-webkit-transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;font-size:1.5rem;}</style><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-vubbuv" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="KeyboardArrowDownIcon"><path d="M7.41 8.59 12 13.17l4.59-4.58L18 10l-6 6-6-6 1.41-1.41z"/></svg></span></button></div></div></div><style data-emotion="css e1o27d">.css-e1o27d{width:-webkit-fit-content;width:-moz-fit-content;width:fit-content;position:fixed;bottom:4rem;right:1rem;}</style><div class="MuiBox-root css-e1o27d"><style data-emotion="css ifa2st">.css-ifa2st{text-transform:none;font-family:-apple-system,"Poppins","Helvetica Neue",sans-serif,"Noto Sans","Fira Code","IBM Plex Sans","sans-serif";font-weight:500;font-size:0.875rem;line-height:1.75;min-height:auto;-webkit-transition:background-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,border-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:background-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,border-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;border-radius:17px;padding:0 8px;min-width:34px;width:auto;height:34px;z-index:1050;box-shadow:0px 3px 5px -1px rgba(0,0,0,0.2),0px 6px 10px 0px rgba(0,0,0,0.14),0px 1px 18px 0px rgba(0,0,0,0.12);color:rgba(0, 0, 0, 0.87);background-color:#e0e0e0;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;color:#666666;background-color:#eff4f7;border-radius:0.5rem;height:2rem;width:2rem;box-shadow:none;}.css-ifa2st:active{box-shadow:0px 7px 8px -4px rgba(0,0,0,0.2),0px 12px 17px 2px rgba(0,0,0,0.14),0px 5px 22px 4px rgba(0,0,0,0.12);}.css-ifa2st:hover{background-color:#f5f5f5;-webkit-text-decoration:none;text-decoration:none;}@media (hover: none){.css-ifa2st:hover{background-color:#e0e0e0;}}.css-ifa2st.Mui-focusVisible{box-shadow:0px 3px 5px -1px rgba(0,0,0,0.2),0px 6px 10px 0px rgba(0,0,0,0.14),0px 1px 18px 0px rgba(0,0,0,0.12);}.css-ifa2st.Mui-disabled{color:rgba(0, 0, 0, 0.26);box-shadow:none;background-color:rgba(0, 0, 0, 0.12);}.css-ifa2st:hover{color:#fff;background-color:#0ca6f2;}</style><style data-emotion="css 85n127">.css-85n127{display:-webkit-inline-box;display:-webkit-inline-flex;display:-ms-inline-flexbox;display:inline-flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-ms-flex-pack:center;-webkit-justify-content:center;justify-content:center;position:relative;box-sizing:border-box;-webkit-tap-highlight-color:transparent;background-color:transparent;outline:0;border:0;margin:0;border-radius:0;padding:0;cursor:pointer;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;vertical-align:middle;-moz-appearance:none;-webkit-appearance:none;-webkit-text-decoration:none;text-decoration:none;color:inherit;text-transform:none;font-family:-apple-system,"Poppins","Helvetica Neue",sans-serif,"Noto Sans","Fira Code","IBM Plex Sans","sans-serif";font-weight:500;font-size:0.875rem;line-height:1.75;min-height:auto;-webkit-transition:background-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,border-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:background-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,border-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;border-radius:17px;padding:0 8px;min-width:34px;width:auto;height:34px;z-index:1050;box-shadow:0px 3px 5px -1px rgba(0,0,0,0.2),0px 6px 10px 0px rgba(0,0,0,0.14),0px 1px 18px 0px rgba(0,0,0,0.12);color:rgba(0, 0, 0, 0.87);background-color:#e0e0e0;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;color:#666666;background-color:#eff4f7;border-radius:0.5rem;height:2rem;width:2rem;box-shadow:none;}.css-85n127::-moz-focus-inner{border-style:none;}.css-85n127.Mui-disabled{pointer-events:none;cursor:default;}@media print{.css-85n127{-webkit-print-color-adjust:exact;color-adjust:exact;}}.css-85n127:active{box-shadow:0px 7px 8px -4px rgba(0,0,0,0.2),0px 12px 17px 2px rgba(0,0,0,0.14),0px 5px 22px 4px rgba(0,0,0,0.12);}.css-85n127:hover{background-color:#f5f5f5;-webkit-text-decoration:none;text-decoration:none;}@media (hover: none){.css-85n127:hover{background-color:#e0e0e0;}}.css-85n127.Mui-focusVisible{box-shadow:0px 3px 5px -1px rgba(0,0,0,0.2),0px 6px 10px 0px rgba(0,0,0,0.14),0px 1px 18px 0px rgba(0,0,0,0.12);}.css-85n127.Mui-disabled{color:rgba(0, 0, 0, 0.26);box-shadow:none;background-color:rgba(0, 0, 0, 0.12);}.css-85n127:hover{color:#fff;background-color:#0ca6f2;}</style><button class="MuiButtonBase-root MuiFab-root MuiFab-extended MuiFab-sizeSmall MuiFab-default css-85n127" tabindex="0" type="button" aria-label="feedback"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-vubbuv" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="RateReviewIcon"><path d="M20 2H4c-1.1 0-1.99.9-1.99 2L2 22l4-4h14c1.1 0 2-.9 2-2V4c0-1.1-.9-2-2-2zM6 14v-2.47l6.88-6.88c.2-.2.51-.2.71 0l1.77 1.77c.2.2.2.51 0 .71L8.47 14H6zm12 0h-7.5l2-2H18v2z"/></svg></button><style data-emotion="css 1e2dcm1">.css-1e2dcm1{z-index:1500;pointer-events:none;}</style><style data-emotion="css okvapm">.css-okvapm{z-index:1500;pointer-events:none;}</style><style data-emotion="css sao3qo">.css-sao3qo{width:14.5rem;bottom:2.5rem;right:0.5rem;border-radius:0.25rem;;}</style><div class="MuiBox-root css-sao3qo"><style data-emotion="css 14ym7v5">.css-14ym7v5{height:2.625rem;width:100%;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;background-color:#282a36;border-radius:0.25rem 0.25rem 0 0;}</style><div class="MuiBox-root css-14ym7v5"><style data-emotion="css 1q162ds">.css-1q162ds{margin:0;font-size:1rem;line-height:1.5rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;color:#fff;padding:0 1rem;}</style><span class="MuiTypography-root MuiTypography-body1 css-1q162ds">文档内容是否有帮助？</span><style data-emotion="css sakgg6">.css-sakgg6{text-align:center;-webkit-flex:0 0 auto;-ms-flex:0 0 auto;flex:0 0 auto;font-size:1.5rem;padding:8px;border-radius:50%;overflow:visible;color:rgba(0, 0, 0, 0.54);-webkit-transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;padding:5px;font-size:1.125rem;}.css-sakgg6:hover{background-color:rgba(0, 0, 0, 0.04);}@media (hover: none){.css-sakgg6:hover{background-color:transparent;}}.css-sakgg6.Mui-disabled{background-color:transparent;color:rgba(0, 0, 0, 0.26);}</style><style data-emotion="css 1j7qk7u">.css-1j7qk7u{display:-webkit-inline-box;display:-webkit-inline-flex;display:-ms-inline-flexbox;display:inline-flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-ms-flex-pack:center;-webkit-justify-content:center;justify-content:center;position:relative;box-sizing:border-box;-webkit-tap-highlight-color:transparent;background-color:transparent;outline:0;border:0;margin:0;border-radius:0;padding:0;cursor:pointer;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;vertical-align:middle;-moz-appearance:none;-webkit-appearance:none;-webkit-text-decoration:none;text-decoration:none;color:inherit;text-align:center;-webkit-flex:0 0 auto;-ms-flex:0 0 auto;flex:0 0 auto;font-size:1.5rem;padding:8px;border-radius:50%;overflow:visible;color:rgba(0, 0, 0, 0.54);-webkit-transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;padding:5px;font-size:1.125rem;}.css-1j7qk7u::-moz-focus-inner{border-style:none;}.css-1j7qk7u.Mui-disabled{pointer-events:none;cursor:default;}@media print{.css-1j7qk7u{-webkit-print-color-adjust:exact;color-adjust:exact;}}.css-1j7qk7u:hover{background-color:rgba(0, 0, 0, 0.04);}@media (hover: none){.css-1j7qk7u:hover{background-color:transparent;}}.css-1j7qk7u.Mui-disabled{background-color:transparent;color:rgba(0, 0, 0, 0.26);}</style><button class="MuiButtonBase-root MuiIconButton-root MuiIconButton-sizeSmall css-1j7qk7u" tabindex="0" type="button" aria-label="close"><style data-emotion="css 1v748dk">.css-1v748dk{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;width:1em;height:1em;display:inline-block;fill:currentColor;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;-webkit-transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;font-size:inherit;color:#fff;}</style><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeInherit css-1v748dk" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="CloseIcon"><path d="M19 6.41 17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12z"/></svg></button></div><style data-emotion="css p1mlx6">.css-p1mlx6{background-color:#F7F8F9;padding:1rem;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:column;-ms-flex-direction:column;flex-direction:column;max-height:calc(100vh - 20rem);overflow-y:auto;}</style><div class="FeedbackBtn-module--feedbackForm--ffVBb MuiBox-root css-p1mlx6"><style data-emotion="css ol10w6">.css-ol10w6{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:row;-ms-flex-direction:row;flex-direction:row;-webkit-box-pack:space-evenly;-ms-flex-pack:space-evenly;-webkit-justify-content:space-evenly;justify-content:space-evenly;}</style><div class="css-ol10w6"><style data-emotion="css 1wf493t">.css-1wf493t{text-align:center;-webkit-flex:0 0 auto;-ms-flex:0 0 auto;flex:0 0 auto;font-size:1.5rem;padding:8px;border-radius:50%;overflow:visible;color:rgba(0, 0, 0, 0.54);-webkit-transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;}.css-1wf493t:hover{background-color:rgba(0, 0, 0, 0.04);}@media (hover: none){.css-1wf493t:hover{background-color:transparent;}}.css-1wf493t.Mui-disabled{background-color:transparent;color:rgba(0, 0, 0, 0.26);}</style><style data-emotion="css 1yxmbwk">.css-1yxmbwk{display:-webkit-inline-box;display:-webkit-inline-flex;display:-ms-inline-flexbox;display:inline-flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-ms-flex-pack:center;-webkit-justify-content:center;justify-content:center;position:relative;box-sizing:border-box;-webkit-tap-highlight-color:transparent;background-color:transparent;outline:0;border:0;margin:0;border-radius:0;padding:0;cursor:pointer;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;vertical-align:middle;-moz-appearance:none;-webkit-appearance:none;-webkit-text-decoration:none;text-decoration:none;color:inherit;text-align:center;-webkit-flex:0 0 auto;-ms-flex:0 0 auto;flex:0 0 auto;font-size:1.5rem;padding:8px;border-radius:50%;overflow:visible;color:rgba(0, 0, 0, 0.54);-webkit-transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;}.css-1yxmbwk::-moz-focus-inner{border-style:none;}.css-1yxmbwk.Mui-disabled{pointer-events:none;cursor:default;}@media print{.css-1yxmbwk{-webkit-print-color-adjust:exact;color-adjust:exact;}}.css-1yxmbwk:hover{background-color:rgba(0, 0, 0, 0.04);}@media (hover: none){.css-1yxmbwk:hover{background-color:transparent;}}.css-1yxmbwk.Mui-disabled{background-color:transparent;color:rgba(0, 0, 0, 0.26);}</style><button class="MuiButtonBase-root MuiIconButton-root MuiIconButton-sizeMedium css-1yxmbwk" tabindex="0" type="button" aria-label="Thumb Up"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-vubbuv" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ThumbUpIcon"><path d="M1 21h4V9H1v12zm22-11c0-1.1-.9-2-2-2h-6.31l.95-4.57.03-.32c0-.41-.17-.79-.44-1.06L14.17 1 7.59 7.59C7.22 7.95 7 8.45 7 9v10c0 1.1.9 2 2 2h9c.83 0 1.54-.5 1.84-1.22l3.02-7.05c.09-.23.14-.47.14-.73v-2z"/></svg></button><button class="MuiButtonBase-root MuiIconButton-root MuiIconButton-sizeMedium css-1yxmbwk" tabindex="0" type="button" aria-label="Thumb Down"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-vubbuv" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ThumbDownIcon"><path d="M15 3H6c-.83 0-1.54.5-1.84 1.22l-3.02 7.05c-.09.23-.14.47-.14.73v2c0 1.1.9 2 2 2h6.31l-.95 4.57-.03.32c0 .41.17.79.44 1.06L9.83 23l6.59-6.59c.36-.36.58-.86.58-1.41V5c0-1.1-.9-2-2-2zm4 0v12h4V3h-4z"/></svg></button></div></div></div></div><style data-emotion="css 18rapy9">.css-18rapy9{width:-webkit-fit-content;width:-moz-fit-content;width:fit-content;position:fixed;bottom:1rem;right:1rem;}</style><div class="MuiBox-root css-18rapy9"><style data-emotion="css 1ez406v">.css-1ez406v{text-transform:none;font-family:-apple-system,"Poppins","Helvetica Neue",sans-serif,"Noto Sans","Fira Code","IBM Plex Sans","sans-serif";font-weight:500;font-size:0.875rem;line-height:1.75;min-height:auto;-webkit-transition:background-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,border-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:background-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,border-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;border-radius:17px;padding:0 8px;min-width:34px;width:auto;height:34px;z-index:1050;box-shadow:0px 3px 5px -1px rgba(0,0,0,0.2),0px 6px 10px 0px rgba(0,0,0,0.14),0px 1px 18px 0px rgba(0,0,0,0.12);color:rgba(0, 0, 0, 0.87);background-color:#e0e0e0;;color:#666666;background-color:#eff4f7;border-radius:0.5rem;height:2rem;width:2rem;box-shadow:none;}.css-1ez406v:active{box-shadow:0px 7px 8px -4px rgba(0,0,0,0.2),0px 12px 17px 2px rgba(0,0,0,0.14),0px 5px 22px 4px rgba(0,0,0,0.12);}.css-1ez406v:hover{background-color:#f5f5f5;-webkit-text-decoration:none;text-decoration:none;}@media (hover: none){.css-1ez406v:hover{background-color:#e0e0e0;}}.css-1ez406v.Mui-focusVisible{box-shadow:0px 3px 5px -1px rgba(0,0,0,0.2),0px 6px 10px 0px rgba(0,0,0,0.14),0px 1px 18px 0px rgba(0,0,0,0.12);}.css-1ez406v.Mui-disabled{color:rgba(0, 0, 0, 0.26);box-shadow:none;background-color:rgba(0, 0, 0, 0.12);}.css-1ez406v:hover{color:#fff;background-color:#0ca6f2;}</style><style data-emotion="css d4rjj9">.css-d4rjj9{display:-webkit-inline-box;display:-webkit-inline-flex;display:-ms-inline-flexbox;display:inline-flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-ms-flex-pack:center;-webkit-justify-content:center;justify-content:center;position:relative;box-sizing:border-box;-webkit-tap-highlight-color:transparent;background-color:transparent;outline:0;border:0;margin:0;border-radius:0;padding:0;cursor:pointer;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;vertical-align:middle;-moz-appearance:none;-webkit-appearance:none;-webkit-text-decoration:none;text-decoration:none;color:inherit;text-transform:none;font-family:-apple-system,"Poppins","Helvetica Neue",sans-serif,"Noto Sans","Fira Code","IBM Plex Sans","sans-serif";font-weight:500;font-size:0.875rem;line-height:1.75;min-height:auto;-webkit-transition:background-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,border-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:background-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,border-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;border-radius:17px;padding:0 8px;min-width:34px;width:auto;height:34px;z-index:1050;box-shadow:0px 3px 5px -1px rgba(0,0,0,0.2),0px 6px 10px 0px rgba(0,0,0,0.14),0px 1px 18px 0px rgba(0,0,0,0.12);color:rgba(0, 0, 0, 0.87);background-color:#e0e0e0;;color:#666666;background-color:#eff4f7;border-radius:0.5rem;height:2rem;width:2rem;box-shadow:none;}.css-d4rjj9::-moz-focus-inner{border-style:none;}.css-d4rjj9.Mui-disabled{pointer-events:none;cursor:default;}@media print{.css-d4rjj9{-webkit-print-color-adjust:exact;color-adjust:exact;}}.css-d4rjj9:active{box-shadow:0px 7px 8px -4px rgba(0,0,0,0.2),0px 12px 17px 2px rgba(0,0,0,0.14),0px 5px 22px 4px rgba(0,0,0,0.12);}.css-d4rjj9:hover{background-color:#f5f5f5;-webkit-text-decoration:none;text-decoration:none;}@media (hover: none){.css-d4rjj9:hover{background-color:#e0e0e0;}}.css-d4rjj9.Mui-focusVisible{box-shadow:0px 3px 5px -1px rgba(0,0,0,0.2),0px 6px 10px 0px rgba(0,0,0,0.14),0px 1px 18px 0px rgba(0,0,0,0.12);}.css-d4rjj9.Mui-disabled{color:rgba(0, 0, 0, 0.26);box-shadow:none;background-color:rgba(0, 0, 0, 0.12);}.css-d4rjj9:hover{color:#fff;background-color:#0ca6f2;}</style><button class="MuiButtonBase-root MuiFab-root MuiFab-extended MuiFab-sizeSmall MuiFab-default css-d4rjj9" tabindex="0" type="button" id="scroll-to-top" aria-label="scroll-to-top"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-vubbuv" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="VerticalAlignTopIcon"><path d="M8 11h3v10h2V11h3l-4-4-4 4zM4 3v2h16V3H4z"/></svg></button></div></div></main></div></div><style data-emotion="css meijt3">.css-meijt3{background-color:#20222B;padding:3.5rem 0;}</style><footer class="MuiBox-root css-meijt3"><style data-emotion="css 1qsxih2">.css-1qsxih2{width:100%;margin-left:auto;box-sizing:border-box;margin-right:auto;display:block;padding-left:16px;padding-right:16px;}@media (min-width:600px){.css-1qsxih2{padding-left:24px;padding-right:24px;}}@media (min-width:1200px){.css-1qsxih2{max-width:1200px;}}</style><div class="MuiContainer-root MuiContainer-maxWidthLg css-1qsxih2"><style data-emotion="css ha8tv0">.css-ha8tv0{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:row;-ms-flex-direction:row;flex-direction:row;-webkit-box-pack:justify;-webkit-justify-content:space-between;justify-content:space-between;row-gap:4rem;}@media (min-width:0px){.css-ha8tv0{-webkit-box-flex-wrap:wrap;-webkit-flex-wrap:wrap;-ms-flex-wrap:wrap;flex-wrap:wrap;}}@media (min-width:900px){.css-ha8tv0{-webkit-box-flex-wrap:nowrap;-webkit-flex-wrap:nowrap;-ms-flex-wrap:nowrap;flex-wrap:nowrap;}}</style><div class="css-ha8tv0"><style data-emotion="css 1m5txad">.css-1m5txad{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:column;-ms-flex-direction:column;flex-direction:column;gap:2rem;}@media (min-width:0px){.css-1m5txad{;}}@media (min-width:900px){.css-1m5txad{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;}}</style><div class="css-1m5txad"><style data-emotion="css 1pmugoj">.css-1pmugoj{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;width:1em;height:1em;display:inline-block;fill:currentColor;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;-webkit-transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;font-size:1.5rem;width:6.125rem;height:1.625rem;}</style><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-1pmugoj" focusable="false" aria-hidden="true" viewbox="0 0 98 26" fill="none"><path d="M39.8024 6.68462H38.2456V8.23794H39.8024V6.68462Z" fill="white"/><path d="M39.8024 10.1767H38.2456V19.6531H39.8024V10.1767Z" fill="white"/><path d="M45.8612 9.58899C45.2783 9.57411 44.6988 9.67987 44.1589 9.89959C43.6191 10.1193 43.1308 10.4482 42.7247 10.8656C42.3149 11.2856 41.9939 11.7834 41.7807 12.3295C41.5675 12.8756 41.4664 13.4589 41.4835 14.0448V19.6417H42.9886V13.9169C42.9819 13.5402 43.0543 13.1663 43.2012 12.8192C43.3482 12.4722 43.5663 12.1597 43.8416 11.9018C44.1029 11.6309 44.4167 11.4157 44.7638 11.2694C45.111 11.1231 45.4843 11.0487 45.8612 11.0507C46.2338 11.0465 46.6033 11.1191 46.9465 11.2639C47.2897 11.4087 47.5993 11.6226 47.8559 11.8923C48.1311 12.1509 48.35 12.4633 48.4991 12.8099C48.6481 13.1566 48.7241 13.5302 48.7222 13.9074V19.6417H50.2274V14.0448C50.2442 13.4571 50.1409 12.8722 49.9239 12.3257C49.7069 11.7791 49.3807 11.2823 48.9651 10.8656C48.565 10.4493 48.0824 10.1208 47.5479 9.90096C47.0135 9.68116 46.439 9.57491 45.8612 9.58899Z" fill="white"/><path d="M61.7596 18.7143V14.6459C61.7756 13.9638 61.6477 13.2859 61.3841 12.6564C61.1205 12.0268 60.7272 11.4596 60.2296 10.9916C59.7774 10.5253 59.2376 10.1525 58.6411 9.89442C58.0445 9.63633 57.4028 9.49802 56.7526 9.48739C56.1024 9.47676 55.4565 9.59401 54.8518 9.83245C54.247 10.0709 53.6953 10.4259 53.228 10.8771C53.1687 10.9343 53.1114 10.9935 53.054 11.0526C52.1288 12.0089 51.6213 13.2921 51.6426 14.6211C51.6367 15.3083 51.7691 15.9897 52.0319 16.6249C52.2947 17.2601 52.6826 17.8363 53.1726 18.3193C53.6426 18.8105 54.2127 19.1955 54.8445 19.4484C55.4763 19.7012 56.155 19.8159 56.835 19.7848C57.4825 19.769 58.1204 19.6247 58.7114 19.3603C59.3025 19.0959 59.8348 18.7167 60.2774 18.2448V18.8917M60.2774 18.8784C60.2792 19.3029 60.1895 19.7229 60.0143 20.1098C59.839 20.4967 59.5825 20.8414 59.2619 21.1206C58.947 21.4286 58.5743 21.6715 58.165 21.8353C57.7557 21.999 57.318 22.0804 56.877 22.0747C56.1126 22.0789 55.368 21.8321 54.758 21.3725C54.2743 21.0384 53.885 20.5856 53.6277 20.0577L52.4363 20.7466C52.735 21.3328 53.1594 21.8461 53.6794 22.2503C54.5478 22.9254 55.6137 23.2986 56.7145 23.3132H56.9402C58.1311 23.32 59.2863 22.9079 60.2029 22.1491C60.6874 21.7899 61.0799 21.3213 61.3481 20.7816C61.6163 20.242 61.7528 19.6467 61.7462 19.0444V18.7009M60.2488 14.7337C60.2385 15.6811 59.86 16.5876 59.1931 17.2621C58.8825 17.6017 58.5031 17.8716 58.0801 18.0539C57.6571 18.2362 57.2001 18.3266 56.7393 18.3193C56.267 18.3286 55.7979 18.24 55.3617 18.059C54.9255 17.878 54.5317 17.6086 54.2053 17.2678C53.5237 16.5954 53.1319 15.6842 53.1134 14.728C53.0948 13.7719 53.4509 12.8462 54.1059 12.148C54.4082 11.7918 54.7822 11.5029 55.2036 11.3001C55.625 11.0973 56.0843 10.985 56.5519 10.9706H56.7432C57.2041 10.9639 57.6609 11.0579 58.0815 11.2462C58.5021 11.4344 58.8763 11.7123 59.1778 12.0602C59.5361 12.4039 59.8168 12.8201 60.0008 13.2808C60.1849 13.7416 60.2681 14.2363 60.2449 14.7317L60.2488 14.7337Z" fill="white"/><path d="M73.3512 16.0866L73.3149 16.1362C72.8848 16.8154 72.2936 17.3784 71.5936 17.7754C70.8841 18.2096 70.0697 18.4431 69.2374 18.4509C67.87 18.4509 66.6651 17.9014 65.6726 16.8251C64.7087 15.7657 64.1956 14.3738 64.242 12.9437C64.2483 11.5757 64.773 10.2606 65.7108 9.26268C66.1382 8.77658 66.6651 8.38758 67.256 8.12193C67.8469 7.85627 68.488 7.72014 69.1361 7.72272C70.9434 7.70936 72.2974 8.44785 73.29 9.98782L73.3149 10.0393H73.3397L74.5063 9.31229C74.0185 8.49472 73.3596 7.79176 72.5747 7.25138C71.5806 6.59524 70.416 6.24307 69.224 6.23809C68.3844 6.21999 67.5505 6.38084 66.7781 6.70991C66.0057 7.03898 65.3126 7.52869 64.745 8.14635C63.5 9.42679 62.8631 11.0679 62.8631 13.0067C62.8348 14.8078 63.4994 16.5513 64.7201 17.8785C65.9499 19.2142 67.4416 19.8802 69.1495 19.8802H69.2107C71.4578 19.8306 73.3149 18.7353 74.4929 16.8003L73.3512 16.0866Z" fill="white"/><path d="M82.1104 6.43273H80.5211L74.5924 19.6417H76.4877L78.3179 15.2527L78.9586 13.8883L81.3435 8.29901L83.6786 13.8826H80.3298L79.7159 15.247H84.2198L86.0635 19.636H87.7331L82.1104 6.43273Z" fill="white"/><path d="M96.3947 7.63303C95.4904 6.83506 94.3158 6.41006 93.1091 6.44418H88.8098V19.6398H90.3646V14.4703V13.0811V7.87347H93.1435C93.8829 7.85905 94.6034 8.10726 95.1765 8.5738C95.4521 8.77883 95.6784 9.04265 95.8389 9.34604C95.9993 9.64943 96.0899 9.98473 96.104 10.3275C96.1399 10.7052 96.0833 11.0859 95.9391 11.437C95.7948 11.788 95.5672 12.0988 95.2759 12.3426C94.7187 12.8445 93.9895 13.1136 93.2391 13.0945H91.6135V14.4837H93.4839C94.5638 14.4995 95.6076 14.0958 96.3947 13.3578C96.7877 13.0165 97.103 12.5952 97.3194 12.1222C97.5358 11.6492 97.6483 11.1355 97.6493 10.6156C97.6813 10.056 97.5849 9.49648 97.3675 8.97963C97.1501 8.46277 96.8174 8.00222 96.3947 7.63303Z" fill="white"/><path d="M35.4611 7.63303C34.5559 6.8351 33.3808 6.41014 32.1735 6.44418H27.8819V19.6398H29.4386V14.4703V13.0811V7.87347H32.2232C32.9628 7.85788 33.6838 8.10622 34.2562 8.5738C34.5326 8.77806 34.7595 9.04172 34.9201 9.34527C35.0806 9.64882 35.1707 9.9845 35.1837 10.3275C35.2205 10.7053 35.1643 11.0863 35.02 11.4374C34.8756 11.7886 34.6476 12.0993 34.3556 12.3426C33.7975 12.848 33.0646 13.1176 32.3112 13.0945H30.6932V14.4837H32.5617C33.6423 14.4998 34.6868 14.096 35.4744 13.3578C35.8649 13.017 36.1782 12.5973 36.3939 12.1265C36.6095 11.6558 36.7224 11.1447 36.7252 10.6271C36.76 10.0646 36.664 9.50163 36.4447 8.98225C36.2254 8.46287 35.8888 8.00111 35.4611 7.63303Z" fill="white"/><path d="M45.9376 9.60044C45.3565 9.58541 44.7786 9.69114 44.2406 9.91092C43.7026 10.1307 43.2164 10.4597 42.8126 10.8771C42.403 11.2947 42.0819 11.7905 41.8687 12.3348C41.6554 12.879 41.5543 13.4606 41.5714 14.0448V19.6169H43.0766V13.9074C43.0699 13.5307 43.1423 13.1568 43.2892 12.8097C43.4361 12.4626 43.6542 12.1501 43.9295 11.8923C44.1906 11.621 44.5043 11.4056 44.8515 11.2593C45.1987 11.113 45.5722 11.0387 45.9491 11.0412C46.3208 11.0379 46.6891 11.1119 47.0305 11.2584C47.372 11.405 47.6791 11.6208 47.9324 11.8923C48.2076 12.1508 48.4264 12.4632 48.5752 12.8099C48.7239 13.1566 48.7994 13.5302 48.7968 13.9074V19.6169H50.3038V14.0448C50.3207 13.4605 50.2193 12.8788 50.0057 12.3345C49.7922 11.7903 49.4707 11.2946 49.0607 10.8771C48.6549 10.463 48.1685 10.1361 47.6315 9.9166C47.0944 9.69706 46.518 9.58946 45.9376 9.60044Z" fill="white"/><path d="M20.3582 4.0798L6.31671 0.0610093C6.1291 0.00562615 5.9324 -0.0123436 5.73783 0.00812623C5.54326 0.028596 5.35463 0.0871044 5.18272 0.180311C5.01082 0.273517 4.85899 0.399596 4.73592 0.551349C4.61284 0.703102 4.52093 0.877557 4.46543 1.06475C4.42506 1.19845 4.40445 1.3373 4.40423 1.47694V3.28978L2.65622 2.79172C2.43668 2.72681 2.20475 2.71529 1.97983 2.75811C1.75491 2.80094 1.54354 2.89687 1.36338 3.03789C1.17948 3.17495 1.03015 3.3529 0.927234 3.55762C0.824319 3.76233 0.770656 3.98817 0.770508 4.21719L0.770508 24.5249C0.772032 24.7498 0.824418 24.9714 0.923761 25.1733C1.0231 25.3752 1.16684 25.5521 1.34425 25.6908C1.60756 25.8896 1.92825 25.998 2.25842 25.9999C2.37094 25.9985 2.4828 25.9824 2.59119 25.9522L13.63 23.3227C13.9565 23.2518 14.2487 23.0711 14.4576 22.8109C14.6665 22.5507 14.7795 22.2268 14.7775 21.8934V16.264L20.3008 14.9282C20.6296 14.8562 20.9233 14.6731 21.1324 14.4099C21.3414 14.1467 21.453 13.8195 21.4483 13.4837V5.49572C21.4483 5.17286 21.3414 4.85904 21.1443 4.603C20.9472 4.34696 20.6708 4.16304 20.3582 4.0798ZM6.13503 16.8651C6.08029 16.8782 6.02258 16.8693 5.97438 16.8403C5.95046 16.8258 5.92969 16.8067 5.91327 16.7841C5.89685 16.7615 5.88511 16.7358 5.87875 16.7086C5.87684 16.6909 5.87684 16.673 5.87875 16.6552L5.85963 5.20567L13.0831 7.25132C13.154 7.2719 13.2163 7.31479 13.2607 7.37359C13.3052 7.4324 13.3294 7.50397 13.3298 7.57763V15.1343L6.13503 16.8651ZM5.86154 18.3574H5.88831C6.00362 18.3599 6.11875 18.3471 6.23065 18.3192L13.3298 16.6018V21.3724L13.3183 21.6548C13.3178 21.7314 13.2926 21.8058 13.2464 21.8669C13.2003 21.9281 13.1356 21.9728 13.062 21.9945L2.49174 24.4962C2.46455 24.5029 2.43629 24.5039 2.40867 24.4993C2.38105 24.4948 2.35466 24.4846 2.33109 24.4695C2.30718 24.455 2.28641 24.4359 2.26999 24.4133C2.25357 24.3907 2.24183 24.365 2.23547 24.3379C2.23356 24.3207 2.23356 24.3034 2.23547 24.2863V4.45C2.2344 4.39762 2.25373 4.34687 2.2894 4.30843C2.32507 4.26999 2.3743 4.24686 2.42672 4.24391C2.45024 4.24466 2.47348 4.24917 2.49557 4.25727L4.40805 4.79539V16.8842C4.40629 17.0767 4.44253 17.2676 4.51472 17.4461C4.5869 17.6245 4.69362 17.7871 4.82877 17.9244C4.96391 18.0618 5.12485 18.1712 5.30238 18.2464C5.47991 18.3217 5.67057 18.3614 5.86345 18.3631L5.86154 18.3574ZM13.7027 5.92699L5.86154 3.69433L5.84815 1.71738C5.84814 1.66034 5.87059 1.60557 5.91065 1.56489C5.95072 1.5242 6.00519 1.50084 6.06235 1.49984H6.12546L19.7232 5.37932C19.7972 5.40126 19.8617 5.44709 19.9067 5.50961C19.9517 5.57213 19.9746 5.64779 19.9718 5.72472L19.9833 13.2738C19.9879 13.3477 19.9655 13.4208 19.9201 13.4795C19.8747 13.5381 19.8095 13.5782 19.7366 13.5925L14.7699 14.787V7.35818C14.7696 7.03703 14.6652 6.72459 14.4721 6.46763C14.2791 6.21067 14.0078 6.023 13.6989 5.93272L13.7027 5.92699Z" fill="white"/></svg><style data-emotion="css 151f6uh">.css-151f6uh{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:column;-ms-flex-direction:column;flex-direction:column;-webkit-box-flex-wrap:wrap;-webkit-flex-wrap:wrap;-ms-flex-wrap:wrap;flex-wrap:wrap;-webkit-box-pack:center;-ms-flex-pack:center;-webkit-justify-content:center;justify-content:center;}@media (min-width:0px){.css-151f6uh{-webkit-flex-direction:row;-ms-flex-direction:row;flex-direction:row;gap:1rem;}}@media (min-width:900px){.css-151f6uh{-webkit-flex-direction:column;-ms-flex-direction:column;flex-direction:column;gap:0;}}</style><div class="css-151f6uh"><style data-emotion="css 1odbrpm">.css-1odbrpm{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:row;-ms-flex-direction:row;flex-direction:row;color:#e5e5e5;padding-top:0.5rem;padding-bottom:0.5rem;}.css-1odbrpm&gt;:not(style)+:not(style){margin:0;margin-left:16px;}</style><div class="css-1odbrpm"><style data-emotion="css s0h87z">.css-s0h87z{text-align:center;-webkit-flex:0 0 auto;-ms-flex:0 0 auto;flex:0 0 auto;font-size:1.5rem;padding:8px;border-radius:50%;overflow:visible;color:rgba(0, 0, 0, 0.54);-webkit-transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;color:inherit;}.css-s0h87z:hover{background-color:rgba(0, 0, 0, 0.04);}@media (hover: none){.css-s0h87z:hover{background-color:transparent;}}.css-s0h87z.Mui-disabled{background-color:transparent;color:rgba(0, 0, 0, 0.26);}</style><style data-emotion="css 1deacqj">.css-1deacqj{display:-webkit-inline-box;display:-webkit-inline-flex;display:-ms-inline-flexbox;display:inline-flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-ms-flex-pack:center;-webkit-justify-content:center;justify-content:center;position:relative;box-sizing:border-box;-webkit-tap-highlight-color:transparent;background-color:transparent;outline:0;border:0;margin:0;border-radius:0;padding:0;cursor:pointer;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;vertical-align:middle;-moz-appearance:none;-webkit-appearance:none;-webkit-text-decoration:none;text-decoration:none;color:inherit;text-align:center;-webkit-flex:0 0 auto;-ms-flex:0 0 auto;flex:0 0 auto;font-size:1.5rem;padding:8px;border-radius:50%;overflow:visible;color:rgba(0, 0, 0, 0.54);-webkit-transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;color:inherit;}.css-1deacqj::-moz-focus-inner{border-style:none;}.css-1deacqj.Mui-disabled{pointer-events:none;cursor:default;}@media print{.css-1deacqj{-webkit-print-color-adjust:exact;color-adjust:exact;}}.css-1deacqj:hover{background-color:rgba(0, 0, 0, 0.04);}@media (hover: none){.css-1deacqj:hover{background-color:transparent;}}.css-1deacqj.Mui-disabled{background-color:transparent;color:rgba(0, 0, 0, 0.26);}</style><a class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorInherit MuiIconButton-sizeMedium css-1deacqj" tabindex="0" aria-label="github" href="https://github.com/pingcap" target="_blank"><style data-emotion="css vubbuv">.css-vubbuv{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;width:1em;height:1em;display:inline-block;fill:currentColor;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;-webkit-transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;font-size:1.5rem;}</style><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-vubbuv" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="GitHubIcon"><path d="M12 1.27a11 11 0 00-3.48 21.46c.55.09.73-.28.73-.55v-1.84c-3.03.64-3.67-1.46-3.67-1.46-.55-1.29-1.28-1.65-1.28-1.65-.92-.65.1-.65.1-.65 1.1 0 1.73 1.1 1.73 1.1.92 1.65 2.57 1.2 3.21.92a2 2 0 01.64-1.47c-2.47-.27-5.04-1.19-5.04-5.5 0-1.1.46-2.1 1.2-2.84a3.76 3.76 0 010-2.93s.91-.28 3.11 1.1c1.8-.49 3.7-.49 5.5 0 2.1-1.38 3.02-1.1 3.02-1.1a3.76 3.76 0 010 2.93c.83.74 1.2 1.74 1.2 2.94 0 4.21-2.57 5.13-5.04 5.4.45.37.82.92.82 2.02v3.03c0 .27.1.64.73.55A11 11 0 0012 1.27"/></svg></a><a class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorInherit MuiIconButton-sizeMedium css-1deacqj" tabindex="0" aria-label="asktug" href="https://asktug.com/" target="_blank"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-vubbuv" focusable="false" aria-hidden="true" viewbox="0 0 40 40"><g xmlns="http://www.w3.org/2000/svg" data-name="组 4428" fill="currentColor"><g data-name="组 4427"><path d="m11.261 20.637-.172-.172.007.008-.007-.007-.074.068v.044l-.022-.024-.109.109-.043.681.174-.175v.008l.4-.4-.145-.146Z" data-name="路径 13710" transform="translate(-1539 -1382) translate(149 -167) translate(-14 2.909) translate(1415.989 1553.091)"/><path d="M20.011 8.611a8.61 8.61 0 0 0-14.78-6.006L2.695 5.147c-.112.1-.22.211-.321.315L-.001 7.849l.306.33a8.189 8.189 0 0 1 1.772-1.155l.035-.017 1.2-1.2a7.709 7.709 0 0 1 11.02 10.757L13 17.901l-.016.034a8.182 8.182 0 0 1-1.294 1.931l.327.309 2.4-2.4c.2-.183.395-.385.576-.59l2.041-2.05a8.7 8.7 0 0 0 .913-.916l.346-.348-.034-.039a8.641 8.641 0 0 0 1.752-5.221Zm-2.841 2.841A8.627 8.627 0 0 0 5.83 3.279l.042-.042a7.71 7.71 0 0 1 11.449 10.312l-.055.065a7.917 7.917 0 0 1-.551.581 8.622 8.622 0 0 0 .455-2.744Z" data-name="路径 13711" transform="translate(-1539 -1382) translate(149 -167) translate(-14 2.909) translate(1415.989 1553.091)"/></g><path d="M1421.629 1558.829a8.629 8.629 0 0 0-2.129 16.992v5.932l7.775-7.775a8.628 8.628 0 0 0-5.651-15.148Zm-.011 5.995v7.883l-2.266-1.307v-5.269l-2.267 1.309v-2.617l4.533-2.617 2.266 1.308Zm4.554 5.26-2.275 1.313v-5.247l2.275-1.315Z" data-name="路径 13712" transform="translate(-1539 -1382) translate(149 -167) translate(-14 2.909)"/></g></svg></a><a class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorInherit MuiIconButton-sizeMedium css-1deacqj" tabindex="0" aria-label="twitter" href="https://twitter.com/PingCAP" target="_blank"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-vubbuv" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="TwitterIcon"><path d="M22.46 6c-.77.35-1.6.58-2.46.69.88-.53 1.56-1.37 1.88-2.38-.83.5-1.75.85-2.72 1.05C18.37 4.5 17.26 4 16 4c-2.35 0-4.27 1.92-4.27 4.29 0 .34.04.67.11.98C8.28 9.09 5.11 7.38 3 4.79c-.37.63-.58 1.37-.58 2.15 0 1.49.75 2.81 1.91 3.56-.71 0-1.37-.2-1.95-.5v.03c0 2.08 1.48 3.82 3.44 4.21a4.22 4.22 0 0 1-1.93.07 4.28 4.28 0 0 0 4 2.98 8.521 8.521 0 0 1-5.33 1.84c-.34 0-.68-.02-1.02-.06C3.44 20.29 5.7 21 8.12 21 16 21 20.33 14.46 20.33 8.79c0-.19 0-.37-.01-.56.84-.6 1.56-1.36 2.14-2.23z"/></svg></a></div><div class="css-1odbrpm"><a class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorInherit MuiIconButton-sizeMedium css-1deacqj" tabindex="0" aria-label="linkedin" href="https://linkedin.com/company/pingcap" target="_blank"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-vubbuv" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="LinkedInIcon"><path d="M19 3a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h14m-.5 15.5v-5.3a3.26 3.26 0 0 0-3.26-3.26c-.85 0-1.84.52-2.32 1.3v-1.11h-2.79v8.37h2.79v-4.93c0-.77.62-1.4 1.39-1.4a1.4 1.4 0 0 1 1.4 1.4v4.93h2.79M6.88 8.56a1.68 1.68 0 0 0 1.68-1.68c0-.93-.75-1.69-1.68-1.69a1.69 1.69 0 0 0-1.69 1.69c0 .93.76 1.68 1.69 1.68m1.39 9.94v-8.37H5.5v8.37h2.77z"/></svg></a><a class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorInherit MuiIconButton-sizeMedium css-1deacqj" tabindex="0" aria-label="facebook" href="https://facebook.com/pingcap2015" target="_blank"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-vubbuv" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="FacebookIcon"><path d="M5 3h14a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2m13 2h-2.5A3.5 3.5 0 0 0 12 8.5V11h-2v3h2v7h3v-7h3v-3h-3V9a1 1 0 0 1 1-1h2V5z"/></svg></a><a class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorInherit MuiIconButton-sizeMedium css-1deacqj" tabindex="0" aria-label="slack" href="https://slack.tidb.io/invite?team=tidb-community&amp;channel=everyone&amp;ref=pingcap-docs" target="_blank"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-vubbuv" focusable="false" aria-hidden="true" viewbox="0 0 24 24"><path fill="currentColor" d="M6 15a2 2 0 0 1-2 2a2 2 0 0 1-2-2a2 2 0 0 1 2-2h2v2m1 0a2 2 0 0 1 2-2a2 2 0 0 1 2 2v5a2 2 0 0 1-2 2a2 2 0 0 1-2-2v-5m2-8a2 2 0 0 1-2-2a2 2 0 0 1 2-2a2 2 0 0 1 2 2v2H9m0 1a2 2 0 0 1 2 2a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2a2 2 0 0 1 2-2h5m8 2a2 2 0 0 1 2-2a2 2 0 0 1 2 2a2 2 0 0 1-2 2h-2v-2m-1 0a2 2 0 0 1-2 2a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2a2 2 0 0 1 2 2v5m-2 8a2 2 0 0 1 2 2a2 2 0 0 1-2 2a2 2 0 0 1-2-2v-2h2m0-1a2 2 0 0 1-2-2a2 2 0 0 1 2-2h5a2 2 0 0 1 2 2a2 2 0 0 1-2 2h-5Z"/></svg></a></div><div class="css-1odbrpm"><a class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorInherit MuiIconButton-sizeMedium css-1deacqj" tabindex="0" aria-label="youtube" href="https://youtube.com/channel/UCuq4puT32DzHKT5rU1IZpIA" target="_blank"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-vubbuv" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="YouTubeIcon"><path d="M10 15l5.19-3L10 9v6m11.56-7.83c.13.47.22 1.1.28 1.9.07.8.1 1.49.1 2.09L22 12c0 2.19-.16 3.8-.44 4.83-.25.9-.83 1.48-1.73 1.73-.47.13-1.33.22-2.65.28-1.3.07-2.49.1-3.59.1L12 19c-4.19 0-6.8-.16-7.83-.44-.9-.25-1.48-.83-1.73-1.73-.13-.47-.22-1.1-.28-1.9-.07-.8-.1-1.49-.1-2.09L2 12c0-2.19.16-3.8.44-4.83.25-.9.83-1.48 1.73-1.73.47-.13 1.33-.22 2.65-.28 1.3-.07 2.49-.1 3.59-.1L12 5c4.19 0 6.8.16 7.83.44.9.25 1.48.83 1.73 1.73z"/></svg></a><a class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorInherit MuiIconButton-sizeMedium css-1deacqj" tabindex="0" aria-label="reddit" href="https://reddit.com/r/TiDB/" target="_blank"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-vubbuv" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="RedditIcon"><path d="M22 12.14a2.19 2.19 0 0 0-3.71-1.57 10.93 10.93 0 0 0-5.86-1.87l1-4.7 3.27.71a1.56 1.56 0 1 0 .16-.76l-3.64-.77c-.11-.02-.22 0-.29.06-.09.05-.14.14-.16.26l-1.11 5.22c-2.33.07-4.43.78-5.95 1.86A2.2 2.2 0 0 0 4.19 10a2.16 2.16 0 0 0-.9 4.15 3.6 3.6 0 0 0-.05.66c0 3.37 3.92 6.12 8.76 6.12s8.76-2.73 8.76-6.12c0-.21-.01-.44-.05-.66A2.21 2.21 0 0 0 22 12.14M7 13.7c0-.86.68-1.56 1.54-1.56s1.56.7 1.56 1.56a1.56 1.56 0 0 1-1.56 1.56c-.86.02-1.54-.7-1.54-1.56m8.71 4.14C14.63 18.92 12.59 19 12 19c-.61 0-2.65-.1-3.71-1.16a.4.4 0 0 1 0-.57.4.4 0 0 1 .57 0c.68.68 2.14.91 3.14.91s2.47-.23 3.14-.91a.4.4 0 0 1 .57 0c.14.16.14.41 0 .57m-.29-2.56c-.86 0-1.56-.7-1.56-1.56a1.56 1.56 0 0 1 1.56-1.56c.86 0 1.58.7 1.58 1.56a1.6 1.6 0 0 1-1.58 1.56z"/></svg></a></div></div></div><style data-emotion="css 1yi9cru">.css-1yi9cru{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:column;-ms-flex-direction:column;flex-direction:column;gap:0.75rem;min-width:6.75rem;}</style><div class="css-1yi9cru"><style data-emotion="css u73tmc">.css-u73tmc{margin:0;font-size:1rem;line-height:1.5rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;color:#7E7F86;}</style><div class="MuiTypography-root MuiTypography-body1 css-u73tmc">产品</div><style data-emotion="css 1q3grm8">.css-1q3grm8{margin:0;font-size:1rem;line-height:1.5rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;width:-webkit-fit-content;width:-moz-fit-content;width:fit-content;}</style><a class="MuiTypography-root MuiTypography-body1 css-1q3grm8" target="_blank" href="https://cn.pingcap.com/product/#SelectProduct" style="text-decoration:none"><style data-emotion="css rmfl9z">.css-rmfl9z{margin:0;font-size:1rem;line-height:1.5rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;color:#e5e5e5;}</style><div class="MuiTypography-root MuiTypography-body1 css-rmfl9z">TiDB</div></a><a class="MuiTypography-root MuiTypography-body1 css-1q3grm8" target="_blank" href="https://www.pingcap.com/tidb-cloud" style="text-decoration:none"><div class="MuiTypography-root MuiTypography-body1 css-rmfl9z">TiDB Cloud</div></a></div><div class="css-1yi9cru"><div class="MuiTypography-root MuiTypography-body1 css-u73tmc">生态</div><a class="MuiTypography-root MuiTypography-body1 css-1q3grm8" target="_blank" href="https://github.com/tikv/tikv" style="text-decoration:none"><div class="MuiTypography-root MuiTypography-body1 css-rmfl9z">TiKV</div></a><a class="MuiTypography-root MuiTypography-body1 css-1q3grm8" target="_blank" href="https://github.com/pingcap/tiflash" style="text-decoration:none"><div class="MuiTypography-root MuiTypography-body1 css-rmfl9z">TiFlash</div></a><a class="MuiTypography-root MuiTypography-body1 css-1q3grm8" target="_blank" href="https://ossinsight.io/" style="text-decoration:none"><div class="MuiTypography-root MuiTypography-body1 css-rmfl9z">OSS Insight</div></a></div><div class="css-1yi9cru"><div class="MuiTypography-root MuiTypography-body1 css-u73tmc">资源</div><a class="MuiTypography-root MuiTypography-body1 css-1q3grm8" target="_blank" href="https://docs.pingcap.com/zh/tidb/dev/tidb-roadmap" style="text-decoration:none"><div class="MuiTypography-root MuiTypography-body1 css-rmfl9z">TiDB 路线图</div></a><a style="text-decoration:none" sx="[object Object]" hreflang="zh" href="/zh/tidb/stable/faq-overview"><div class="MuiTypography-root MuiTypography-body1 css-rmfl9z">常见问题解答</div></a><a style="text-decoration:none" sx="[object Object]" hreflang="zh" href="/zh/tidb/stable/dev-guide-overview"><div class="MuiTypography-root MuiTypography-body1 css-rmfl9z">开发者手册</div></a><a class="MuiTypography-root MuiTypography-body1 css-1q3grm8" target="_blank" href="https://cn.pingcap.com/blog/" style="text-decoration:none"><div class="MuiTypography-root MuiTypography-body1 css-rmfl9z">博客</div></a><a class="MuiTypography-root MuiTypography-body1 css-1q3grm8" target="_blank" href="https://cn.pingcap.com/education/" style="text-decoration:none"><div class="MuiTypography-root MuiTypography-body1 css-rmfl9z">Education</div></a></div><div class="css-1yi9cru"><div class="MuiTypography-root MuiTypography-body1 css-u73tmc">支持</div><a class="MuiTypography-root MuiTypography-body1 css-1q3grm8" target="_blank" href="https://asktug.com" style="text-decoration:none"><div class="MuiTypography-root MuiTypography-body1 css-rmfl9z">社区</div></a><a class="MuiTypography-root MuiTypography-body1 css-1q3grm8" target="_blank" href="https://cn.pingcap.com/contact/" style="text-decoration:none"><div class="MuiTypography-root MuiTypography-body1 css-rmfl9z">联系我们</div></a></div><div class="css-1yi9cru"><div class="MuiTypography-root MuiTypography-body1 css-u73tmc">公司</div><a class="MuiTypography-root MuiTypography-body1 css-1q3grm8" target="_blank" href="https://cn.pingcap.com/about-us?tab=companyOverview" style="text-decoration:none"><div class="MuiTypography-root MuiTypography-body1 css-rmfl9z">关于我们</div></a><a class="MuiTypography-root MuiTypography-body1 css-1q3grm8" target="_blank" href="https://careers.pingcap.com" style="text-decoration:none"><div class="MuiTypography-root MuiTypography-body1 css-rmfl9z">招贤纳士</div></a><a class="MuiTypography-root MuiTypography-body1 css-1q3grm8" target="_blank" href="https://cn.pingcap.com/about-us?tab=news" style="text-decoration:none"><div class="MuiTypography-root MuiTypography-body1 css-rmfl9z">新闻报道</div></a></div></div><style data-emotion="css 1207o6v">.css-1207o6v{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:column;-ms-flex-direction:column;flex-direction:column;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;padding-top:4.5rem;gap:2.5rem;}@media (min-width:900px){.css-1207o6v{;}}</style><div class="css-1207o6v"><div class="css-151f6uh"><div class="css-1odbrpm"><a class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorInherit MuiIconButton-sizeMedium css-1deacqj" tabindex="0" aria-label="github" href="https://github.com/pingcap" target="_blank"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-vubbuv" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="GitHubIcon"><path d="M12 1.27a11 11 0 00-3.48 21.46c.55.09.73-.28.73-.55v-1.84c-3.03.64-3.67-1.46-3.67-1.46-.55-1.29-1.28-1.65-1.28-1.65-.92-.65.1-.65.1-.65 1.1 0 1.73 1.1 1.73 1.1.92 1.65 2.57 1.2 3.21.92a2 2 0 01.64-1.47c-2.47-.27-5.04-1.19-5.04-5.5 0-1.1.46-2.1 1.2-2.84a3.76 3.76 0 010-2.93s.91-.28 3.11 1.1c1.8-.49 3.7-.49 5.5 0 2.1-1.38 3.02-1.1 3.02-1.1a3.76 3.76 0 010 2.93c.83.74 1.2 1.74 1.2 2.94 0 4.21-2.57 5.13-5.04 5.4.45.37.82.92.82 2.02v3.03c0 .27.1.64.73.55A11 11 0 0012 1.27"/></svg></a><a class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorInherit MuiIconButton-sizeMedium css-1deacqj" tabindex="0" aria-label="asktug" href="https://asktug.com/" target="_blank"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-vubbuv" focusable="false" aria-hidden="true" viewbox="0 0 40 40"><g xmlns="http://www.w3.org/2000/svg" data-name="组 4428" fill="currentColor"><g data-name="组 4427"><path d="m11.261 20.637-.172-.172.007.008-.007-.007-.074.068v.044l-.022-.024-.109.109-.043.681.174-.175v.008l.4-.4-.145-.146Z" data-name="路径 13710" transform="translate(-1539 -1382) translate(149 -167) translate(-14 2.909) translate(1415.989 1553.091)"/><path d="M20.011 8.611a8.61 8.61 0 0 0-14.78-6.006L2.695 5.147c-.112.1-.22.211-.321.315L-.001 7.849l.306.33a8.189 8.189 0 0 1 1.772-1.155l.035-.017 1.2-1.2a7.709 7.709 0 0 1 11.02 10.757L13 17.901l-.016.034a8.182 8.182 0 0 1-1.294 1.931l.327.309 2.4-2.4c.2-.183.395-.385.576-.59l2.041-2.05a8.7 8.7 0 0 0 .913-.916l.346-.348-.034-.039a8.641 8.641 0 0 0 1.752-5.221Zm-2.841 2.841A8.627 8.627 0 0 0 5.83 3.279l.042-.042a7.71 7.71 0 0 1 11.449 10.312l-.055.065a7.917 7.917 0 0 1-.551.581 8.622 8.622 0 0 0 .455-2.744Z" data-name="路径 13711" transform="translate(-1539 -1382) translate(149 -167) translate(-14 2.909) translate(1415.989 1553.091)"/></g><path d="M1421.629 1558.829a8.629 8.629 0 0 0-2.129 16.992v5.932l7.775-7.775a8.628 8.628 0 0 0-5.651-15.148Zm-.011 5.995v7.883l-2.266-1.307v-5.269l-2.267 1.309v-2.617l4.533-2.617 2.266 1.308Zm4.554 5.26-2.275 1.313v-5.247l2.275-1.315Z" data-name="路径 13712" transform="translate(-1539 -1382) translate(149 -167) translate(-14 2.909)"/></g></svg></a><a class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorInherit MuiIconButton-sizeMedium css-1deacqj" tabindex="0" aria-label="twitter" href="https://twitter.com/PingCAP" target="_blank"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-vubbuv" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="TwitterIcon"><path d="M22.46 6c-.77.35-1.6.58-2.46.69.88-.53 1.56-1.37 1.88-2.38-.83.5-1.75.85-2.72 1.05C18.37 4.5 17.26 4 16 4c-2.35 0-4.27 1.92-4.27 4.29 0 .34.04.67.11.98C8.28 9.09 5.11 7.38 3 4.79c-.37.63-.58 1.37-.58 2.15 0 1.49.75 2.81 1.91 3.56-.71 0-1.37-.2-1.95-.5v.03c0 2.08 1.48 3.82 3.44 4.21a4.22 4.22 0 0 1-1.93.07 4.28 4.28 0 0 0 4 2.98 8.521 8.521 0 0 1-5.33 1.84c-.34 0-.68-.02-1.02-.06C3.44 20.29 5.7 21 8.12 21 16 21 20.33 14.46 20.33 8.79c0-.19 0-.37-.01-.56.84-.6 1.56-1.36 2.14-2.23z"/></svg></a></div><div class="css-1odbrpm"><a class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorInherit MuiIconButton-sizeMedium css-1deacqj" tabindex="0" aria-label="linkedin" href="https://linkedin.com/company/pingcap" target="_blank"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-vubbuv" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="LinkedInIcon"><path d="M19 3a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h14m-.5 15.5v-5.3a3.26 3.26 0 0 0-3.26-3.26c-.85 0-1.84.52-2.32 1.3v-1.11h-2.79v8.37h2.79v-4.93c0-.77.62-1.4 1.39-1.4a1.4 1.4 0 0 1 1.4 1.4v4.93h2.79M6.88 8.56a1.68 1.68 0 0 0 1.68-1.68c0-.93-.75-1.69-1.68-1.69a1.69 1.69 0 0 0-1.69 1.69c0 .93.76 1.68 1.69 1.68m1.39 9.94v-8.37H5.5v8.37h2.77z"/></svg></a><a class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorInherit MuiIconButton-sizeMedium css-1deacqj" tabindex="0" aria-label="facebook" href="https://facebook.com/pingcap2015" target="_blank"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-vubbuv" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="FacebookIcon"><path d="M5 3h14a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2m13 2h-2.5A3.5 3.5 0 0 0 12 8.5V11h-2v3h2v7h3v-7h3v-3h-3V9a1 1 0 0 1 1-1h2V5z"/></svg></a><a class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorInherit MuiIconButton-sizeMedium css-1deacqj" tabindex="0" aria-label="slack" href="https://slack.tidb.io/invite?team=tidb-community&amp;channel=everyone&amp;ref=pingcap-docs" target="_blank"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-vubbuv" focusable="false" aria-hidden="true" viewbox="0 0 24 24"><path fill="currentColor" d="M6 15a2 2 0 0 1-2 2a2 2 0 0 1-2-2a2 2 0 0 1 2-2h2v2m1 0a2 2 0 0 1 2-2a2 2 0 0 1 2 2v5a2 2 0 0 1-2 2a2 2 0 0 1-2-2v-5m2-8a2 2 0 0 1-2-2a2 2 0 0 1 2-2a2 2 0 0 1 2 2v2H9m0 1a2 2 0 0 1 2 2a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2a2 2 0 0 1 2-2h5m8 2a2 2 0 0 1 2-2a2 2 0 0 1 2 2a2 2 0 0 1-2 2h-2v-2m-1 0a2 2 0 0 1-2 2a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2a2 2 0 0 1 2 2v5m-2 8a2 2 0 0 1 2 2a2 2 0 0 1-2 2a2 2 0 0 1-2-2v-2h2m0-1a2 2 0 0 1-2-2a2 2 0 0 1 2-2h5a2 2 0 0 1 2 2a2 2 0 0 1-2 2h-5Z"/></svg></a></div><div class="css-1odbrpm"><a class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorInherit MuiIconButton-sizeMedium css-1deacqj" tabindex="0" aria-label="youtube" href="https://youtube.com/channel/UCuq4puT32DzHKT5rU1IZpIA" target="_blank"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-vubbuv" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="YouTubeIcon"><path d="M10 15l5.19-3L10 9v6m11.56-7.83c.13.47.22 1.1.28 1.9.07.8.1 1.49.1 2.09L22 12c0 2.19-.16 3.8-.44 4.83-.25.9-.83 1.48-1.73 1.73-.47.13-1.33.22-2.65.28-1.3.07-2.49.1-3.59.1L12 19c-4.19 0-6.8-.16-7.83-.44-.9-.25-1.48-.83-1.73-1.73-.13-.47-.22-1.1-.28-1.9-.07-.8-.1-1.49-.1-2.09L2 12c0-2.19.16-3.8.44-4.83.25-.9.83-1.48 1.73-1.73.47-.13 1.33-.22 2.65-.28 1.3-.07 2.49-.1 3.59-.1L12 5c4.19 0 6.8.16 7.83.44.9.25 1.48.83 1.73 1.73z"/></svg></a><a class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorInherit MuiIconButton-sizeMedium css-1deacqj" tabindex="0" aria-label="reddit" href="https://reddit.com/r/TiDB/" target="_blank"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-vubbuv" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="RedditIcon"><path d="M22 12.14a2.19 2.19 0 0 0-3.71-1.57 10.93 10.93 0 0 0-5.86-1.87l1-4.7 3.27.71a1.56 1.56 0 1 0 .16-.76l-3.64-.77c-.11-.02-.22 0-.29.06-.09.05-.14.14-.16.26l-1.11 5.22c-2.33.07-4.43.78-5.95 1.86A2.2 2.2 0 0 0 4.19 10a2.16 2.16 0 0 0-.9 4.15 3.6 3.6 0 0 0-.05.66c0 3.37 3.92 6.12 8.76 6.12s8.76-2.73 8.76-6.12c0-.21-.01-.44-.05-.66A2.21 2.21 0 0 0 22 12.14M7 13.7c0-.86.68-1.56 1.54-1.56s1.56.7 1.56 1.56a1.56 1.56 0 0 1-1.56 1.56c-.86.02-1.54-.7-1.54-1.56m8.71 4.14C14.63 18.92 12.59 19 12 19c-.61 0-2.65-.1-3.71-1.16a.4.4 0 0 1 0-.57.4.4 0 0 1 .57 0c.68.68 2.14.91 3.14.91s2.47-.23 3.14-.91a.4.4 0 0 1 .57 0c.14.16.14.41 0 .57m-.29-2.56c-.86 0-1.56-.7-1.56-1.56a1.56 1.56 0 0 1 1.56-1.56c.86 0 1.58.7 1.58 1.56a1.6 1.6 0 0 1-1.58 1.56z"/></svg></a></div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-1pmugoj" focusable="false" aria-hidden="true" viewbox="0 0 98 26" fill="none"><path d="M39.8024 6.68462H38.2456V8.23794H39.8024V6.68462Z" fill="white"/><path d="M39.8024 10.1767H38.2456V19.6531H39.8024V10.1767Z" fill="white"/><path d="M45.8612 9.58899C45.2783 9.57411 44.6988 9.67987 44.1589 9.89959C43.6191 10.1193 43.1308 10.4482 42.7247 10.8656C42.3149 11.2856 41.9939 11.7834 41.7807 12.3295C41.5675 12.8756 41.4664 13.4589 41.4835 14.0448V19.6417H42.9886V13.9169C42.9819 13.5402 43.0543 13.1663 43.2012 12.8192C43.3482 12.4722 43.5663 12.1597 43.8416 11.9018C44.1029 11.6309 44.4167 11.4157 44.7638 11.2694C45.111 11.1231 45.4843 11.0487 45.8612 11.0507C46.2338 11.0465 46.6033 11.1191 46.9465 11.2639C47.2897 11.4087 47.5993 11.6226 47.8559 11.8923C48.1311 12.1509 48.35 12.4633 48.4991 12.8099C48.6481 13.1566 48.7241 13.5302 48.7222 13.9074V19.6417H50.2274V14.0448C50.2442 13.4571 50.1409 12.8722 49.9239 12.3257C49.7069 11.7791 49.3807 11.2823 48.9651 10.8656C48.565 10.4493 48.0824 10.1208 47.5479 9.90096C47.0135 9.68116 46.439 9.57491 45.8612 9.58899Z" fill="white"/><path d="M61.7596 18.7143V14.6459C61.7756 13.9638 61.6477 13.2859 61.3841 12.6564C61.1205 12.0268 60.7272 11.4596 60.2296 10.9916C59.7774 10.5253 59.2376 10.1525 58.6411 9.89442C58.0445 9.63633 57.4028 9.49802 56.7526 9.48739C56.1024 9.47676 55.4565 9.59401 54.8518 9.83245C54.247 10.0709 53.6953 10.4259 53.228 10.8771C53.1687 10.9343 53.1114 10.9935 53.054 11.0526C52.1288 12.0089 51.6213 13.2921 51.6426 14.6211C51.6367 15.3083 51.7691 15.9897 52.0319 16.6249C52.2947 17.2601 52.6826 17.8363 53.1726 18.3193C53.6426 18.8105 54.2127 19.1955 54.8445 19.4484C55.4763 19.7012 56.155 19.8159 56.835 19.7848C57.4825 19.769 58.1204 19.6247 58.7114 19.3603C59.3025 19.0959 59.8348 18.7167 60.2774 18.2448V18.8917M60.2774 18.8784C60.2792 19.3029 60.1895 19.7229 60.0143 20.1098C59.839 20.4967 59.5825 20.8414 59.2619 21.1206C58.947 21.4286 58.5743 21.6715 58.165 21.8353C57.7557 21.999 57.318 22.0804 56.877 22.0747C56.1126 22.0789 55.368 21.8321 54.758 21.3725C54.2743 21.0384 53.885 20.5856 53.6277 20.0577L52.4363 20.7466C52.735 21.3328 53.1594 21.8461 53.6794 22.2503C54.5478 22.9254 55.6137 23.2986 56.7145 23.3132H56.9402C58.1311 23.32 59.2863 22.9079 60.2029 22.1491C60.6874 21.7899 61.0799 21.3213 61.3481 20.7816C61.6163 20.242 61.7528 19.6467 61.7462 19.0444V18.7009M60.2488 14.7337C60.2385 15.6811 59.86 16.5876 59.1931 17.2621C58.8825 17.6017 58.5031 17.8716 58.0801 18.0539C57.6571 18.2362 57.2001 18.3266 56.7393 18.3193C56.267 18.3286 55.7979 18.24 55.3617 18.059C54.9255 17.878 54.5317 17.6086 54.2053 17.2678C53.5237 16.5954 53.1319 15.6842 53.1134 14.728C53.0948 13.7719 53.4509 12.8462 54.1059 12.148C54.4082 11.7918 54.7822 11.5029 55.2036 11.3001C55.625 11.0973 56.0843 10.985 56.5519 10.9706H56.7432C57.2041 10.9639 57.6609 11.0579 58.0815 11.2462C58.5021 11.4344 58.8763 11.7123 59.1778 12.0602C59.5361 12.4039 59.8168 12.8201 60.0008 13.2808C60.1849 13.7416 60.2681 14.2363 60.2449 14.7317L60.2488 14.7337Z" fill="white"/><path d="M73.3512 16.0866L73.3149 16.1362C72.8848 16.8154 72.2936 17.3784 71.5936 17.7754C70.8841 18.2096 70.0697 18.4431 69.2374 18.4509C67.87 18.4509 66.6651 17.9014 65.6726 16.8251C64.7087 15.7657 64.1956 14.3738 64.242 12.9437C64.2483 11.5757 64.773 10.2606 65.7108 9.26268C66.1382 8.77658 66.6651 8.38758 67.256 8.12193C67.8469 7.85627 68.488 7.72014 69.1361 7.72272C70.9434 7.70936 72.2974 8.44785 73.29 9.98782L73.3149 10.0393H73.3397L74.5063 9.31229C74.0185 8.49472 73.3596 7.79176 72.5747 7.25138C71.5806 6.59524 70.416 6.24307 69.224 6.23809C68.3844 6.21999 67.5505 6.38084 66.7781 6.70991C66.0057 7.03898 65.3126 7.52869 64.745 8.14635C63.5 9.42679 62.8631 11.0679 62.8631 13.0067C62.8348 14.8078 63.4994 16.5513 64.7201 17.8785C65.9499 19.2142 67.4416 19.8802 69.1495 19.8802H69.2107C71.4578 19.8306 73.3149 18.7353 74.4929 16.8003L73.3512 16.0866Z" fill="white"/><path d="M82.1104 6.43273H80.5211L74.5924 19.6417H76.4877L78.3179 15.2527L78.9586 13.8883L81.3435 8.29901L83.6786 13.8826H80.3298L79.7159 15.247H84.2198L86.0635 19.636H87.7331L82.1104 6.43273Z" fill="white"/><path d="M96.3947 7.63303C95.4904 6.83506 94.3158 6.41006 93.1091 6.44418H88.8098V19.6398H90.3646V14.4703V13.0811V7.87347H93.1435C93.8829 7.85905 94.6034 8.10726 95.1765 8.5738C95.4521 8.77883 95.6784 9.04265 95.8389 9.34604C95.9993 9.64943 96.0899 9.98473 96.104 10.3275C96.1399 10.7052 96.0833 11.0859 95.9391 11.437C95.7948 11.788 95.5672 12.0988 95.2759 12.3426C94.7187 12.8445 93.9895 13.1136 93.2391 13.0945H91.6135V14.4837H93.4839C94.5638 14.4995 95.6076 14.0958 96.3947 13.3578C96.7877 13.0165 97.103 12.5952 97.3194 12.1222C97.5358 11.6492 97.6483 11.1355 97.6493 10.6156C97.6813 10.056 97.5849 9.49648 97.3675 8.97963C97.1501 8.46277 96.8174 8.00222 96.3947 7.63303Z" fill="white"/><path d="M35.4611 7.63303C34.5559 6.8351 33.3808 6.41014 32.1735 6.44418H27.8819V19.6398H29.4386V14.4703V13.0811V7.87347H32.2232C32.9628 7.85788 33.6838 8.10622 34.2562 8.5738C34.5326 8.77806 34.7595 9.04172 34.9201 9.34527C35.0806 9.64882 35.1707 9.9845 35.1837 10.3275C35.2205 10.7053 35.1643 11.0863 35.02 11.4374C34.8756 11.7886 34.6476 12.0993 34.3556 12.3426C33.7975 12.848 33.0646 13.1176 32.3112 13.0945H30.6932V14.4837H32.5617C33.6423 14.4998 34.6868 14.096 35.4744 13.3578C35.8649 13.017 36.1782 12.5973 36.3939 12.1265C36.6095 11.6558 36.7224 11.1447 36.7252 10.6271C36.76 10.0646 36.664 9.50163 36.4447 8.98225C36.2254 8.46287 35.8888 8.00111 35.4611 7.63303Z" fill="white"/><path d="M45.9376 9.60044C45.3565 9.58541 44.7786 9.69114 44.2406 9.91092C43.7026 10.1307 43.2164 10.4597 42.8126 10.8771C42.403 11.2947 42.0819 11.7905 41.8687 12.3348C41.6554 12.879 41.5543 13.4606 41.5714 14.0448V19.6169H43.0766V13.9074C43.0699 13.5307 43.1423 13.1568 43.2892 12.8097C43.4361 12.4626 43.6542 12.1501 43.9295 11.8923C44.1906 11.621 44.5043 11.4056 44.8515 11.2593C45.1987 11.113 45.5722 11.0387 45.9491 11.0412C46.3208 11.0379 46.6891 11.1119 47.0305 11.2584C47.372 11.405 47.6791 11.6208 47.9324 11.8923C48.2076 12.1508 48.4264 12.4632 48.5752 12.8099C48.7239 13.1566 48.7994 13.5302 48.7968 13.9074V19.6169H50.3038V14.0448C50.3207 13.4605 50.2193 12.8788 50.0057 12.3345C49.7922 11.7903 49.4707 11.2946 49.0607 10.8771C48.6549 10.463 48.1685 10.1361 47.6315 9.9166C47.0944 9.69706 46.518 9.58946 45.9376 9.60044Z" fill="white"/><path d="M20.3582 4.0798L6.31671 0.0610093C6.1291 0.00562615 5.9324 -0.0123436 5.73783 0.00812623C5.54326 0.028596 5.35463 0.0871044 5.18272 0.180311C5.01082 0.273517 4.85899 0.399596 4.73592 0.551349C4.61284 0.703102 4.52093 0.877557 4.46543 1.06475C4.42506 1.19845 4.40445 1.3373 4.40423 1.47694V3.28978L2.65622 2.79172C2.43668 2.72681 2.20475 2.71529 1.97983 2.75811C1.75491 2.80094 1.54354 2.89687 1.36338 3.03789C1.17948 3.17495 1.03015 3.3529 0.927234 3.55762C0.824319 3.76233 0.770656 3.98817 0.770508 4.21719L0.770508 24.5249C0.772032 24.7498 0.824418 24.9714 0.923761 25.1733C1.0231 25.3752 1.16684 25.5521 1.34425 25.6908C1.60756 25.8896 1.92825 25.998 2.25842 25.9999C2.37094 25.9985 2.4828 25.9824 2.59119 25.9522L13.63 23.3227C13.9565 23.2518 14.2487 23.0711 14.4576 22.8109C14.6665 22.5507 14.7795 22.2268 14.7775 21.8934V16.264L20.3008 14.9282C20.6296 14.8562 20.9233 14.6731 21.1324 14.4099C21.3414 14.1467 21.453 13.8195 21.4483 13.4837V5.49572C21.4483 5.17286 21.3414 4.85904 21.1443 4.603C20.9472 4.34696 20.6708 4.16304 20.3582 4.0798ZM6.13503 16.8651C6.08029 16.8782 6.02258 16.8693 5.97438 16.8403C5.95046 16.8258 5.92969 16.8067 5.91327 16.7841C5.89685 16.7615 5.88511 16.7358 5.87875 16.7086C5.87684 16.6909 5.87684 16.673 5.87875 16.6552L5.85963 5.20567L13.0831 7.25132C13.154 7.2719 13.2163 7.31479 13.2607 7.37359C13.3052 7.4324 13.3294 7.50397 13.3298 7.57763V15.1343L6.13503 16.8651ZM5.86154 18.3574H5.88831C6.00362 18.3599 6.11875 18.3471 6.23065 18.3192L13.3298 16.6018V21.3724L13.3183 21.6548C13.3178 21.7314 13.2926 21.8058 13.2464 21.8669C13.2003 21.9281 13.1356 21.9728 13.062 21.9945L2.49174 24.4962C2.46455 24.5029 2.43629 24.5039 2.40867 24.4993C2.38105 24.4948 2.35466 24.4846 2.33109 24.4695C2.30718 24.455 2.28641 24.4359 2.26999 24.4133C2.25357 24.3907 2.24183 24.365 2.23547 24.3379C2.23356 24.3207 2.23356 24.3034 2.23547 24.2863V4.45C2.2344 4.39762 2.25373 4.34687 2.2894 4.30843C2.32507 4.26999 2.3743 4.24686 2.42672 4.24391C2.45024 4.24466 2.47348 4.24917 2.49557 4.25727L4.40805 4.79539V16.8842C4.40629 17.0767 4.44253 17.2676 4.51472 17.4461C4.5869 17.6245 4.69362 17.7871 4.82877 17.9244C4.96391 18.0618 5.12485 18.1712 5.30238 18.2464C5.47991 18.3217 5.67057 18.3614 5.86345 18.3631L5.86154 18.3574ZM13.7027 5.92699L5.86154 3.69433L5.84815 1.71738C5.84814 1.66034 5.87059 1.60557 5.91065 1.56489C5.95072 1.5242 6.00519 1.50084 6.06235 1.49984H6.12546L19.7232 5.37932C19.7972 5.40126 19.8617 5.44709 19.9067 5.50961C19.9517 5.57213 19.9746 5.64779 19.9718 5.72472L19.9833 13.2738C19.9879 13.3477 19.9655 13.4208 19.9201 13.4795C19.8747 13.5381 19.8095 13.5782 19.7366 13.5925L14.7699 14.787V7.35818C14.7696 7.03703 14.6652 6.72459 14.4721 6.46763C14.2791 6.21067 14.0078 6.023 13.6989 5.93272L13.7027 5.92699Z" fill="white"/></svg></div><style data-emotion="css g9p39z">.css-g9p39z{margin:0;font-size:0.875rem;line-height:1.25rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;color:rgba(255, 255, 255, 0.5);padding-top:3rem;}@media (min-width:0px){.css-g9p39z{text-align:center;}}@media (min-width:900px){.css-g9p39z{text-align:left;}}</style><div class="MuiTypography-root MuiTypography-body2 css-g9p39z">© 2023 PingCAP. All Rights Reserved.</div></div></footer></div><div id="gatsby-announcer" style="top:0;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0, 0, 0, 0);white-space:nowrap;border:0" aria-live="assertive" aria-atomic="true"/></div></body>