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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="false" id="left-nav-treeview-0-13" 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-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">参考指南</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-0-14" 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="true" id="left-nav-treeview-0-15" 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">版本发布历史</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" id="left-nav-treeview-0-15-0" 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"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/v7.2/release-notes"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">发布版本汇总</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-1" 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"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/v7.2/release-timeline"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">版本发布时间线</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-2" 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"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/v7.2/versioning"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">TiDB 版本规则</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-3" 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/v7.2/binary-package"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">TiDB 离线包</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-15-4" 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">v7.2</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-0-15-5" 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">v7.1</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-0-15-6" 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">v7.0</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-0-15-7" 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">v6.6</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-0-15-8" 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">v6.5</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-0-15-9" 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">v6.4</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-0-15-10" 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-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">v6.3</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-0-15-11" 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">v6.2</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-0-15-12" 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"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">v6.1</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-0-15-13" 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"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">v6.0</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-0-15-14" 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"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">v5.4</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-0-15-15" 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">v5.3</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-0-15-16" 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-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">v5.2</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-0-15-17" 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-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">v5.1</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-0-15-18" 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-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">v5.0</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-0-15-19" 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">v4.0</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-0-15-19-0" 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"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/v7.2/release-4.0.16"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">4.0.16</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-19-1" 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"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/v7.2/release-4.0.15"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">4.0.15</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-19-2" 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"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/v7.2/release-4.0.14"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">4.0.14</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-19-3" 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-snygwd"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/v7.2/release-4.0.13"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">4.0.13</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-19-4" 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/v7.2/release-4.0.12"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">4.0.12</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-19-5" 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/v7.2/release-4.0.11"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">4.0.11</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-19-6" 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/v7.2/release-4.0.10"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">4.0.10</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-19-7" 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"><a aria-current="page" style="text-decoration:none;width:100%;color:inherit" class="" href="/zh/tidb/v7.2/release-4.0.9"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">4.0.9</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-19-8" 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/v7.2/release-4.0.8"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">4.0.8</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-19-9" 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"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/v7.2/release-4.0.7"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">4.0.7</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-19-10" 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/v7.2/release-4.0.6"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">4.0.6</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-19-11" 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/v7.2/release-4.0.5"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">4.0.5</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-19-12" 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/v7.2/release-4.0.4"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">4.0.4</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-19-13" 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/v7.2/release-4.0.3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">4.0.3</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-19-14" 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/v7.2/release-4.0.2"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">4.0.2</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-19-15" 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"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/v7.2/release-4.0.1"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">4.0.1</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-19-16" 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/v7.2/release-4.0-ga"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">4.0 GA</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-19-17" 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"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/v7.2/release-4.0.0-rc.2"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">4.0.0-rc.2</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-19-18" 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/v7.2/release-4.0.0-rc.1"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">4.0.0-rc.1</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-19-19" 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css-1hwyipb">4.0.0-beta.2</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-19-21" 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/v7.2/release-4.0.0-beta.1"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">4.0.0-beta.1</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-15-19-22" 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 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0ms;border-radius:4px;box-shadow:none;font-size:0.875rem;line-height:1.25rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:rgb(1, 67, 97);background-color:rgb(229, 246, 253);display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;padding:6px 16px;}.css-152gid5 .MuiAlert-icon{color:#03a9f4;}</style><div class="MuiPaper-root MuiPaper-elevation MuiPaper-rounded MuiPaper-elevation0 MuiAlert-root MuiAlert-standardInfo MuiAlert-standard css-152gid5" role="alert"><style data-emotion="css 1l54tgj">.css-1l54tgj{margin-right:12px;padding:7px 0;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;font-size:22px;opacity:0.9;}</style><div class="MuiAlert-icon css-1l54tgj"><style data-emotion="css 1cw4hi4">.css-1cw4hi4{-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;}</style><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeInherit css-1cw4hi4" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="InfoOutlinedIcon"><path d="M11,9H13V7H11M12,20C7.59,20 4,16.41 4,12C4,7.59 7.59,4 12,4C16.41,4 20,7.59 20, 12C20,16.41 16.41,20 12,20M12,2A10,10 0 0,0 2,12A10,10 0 0,0 12,22A10,10 0 0,0 22,12A10, 10 0 0,0 12,2M11,17H13V11H11V17Z"/></svg></div><style data-emotion="css 1xsto0d">.css-1xsto0d{padding:8px 0;min-width:0;overflow:auto;}</style><div class="MuiAlert-message css-1xsto0d"><style data-emotion="css 1h2y6o4">.css-1h2y6o4{font-weight:500;margin-top:-2px;}</style><style data-emotion="css 17ioyuk">.css-17ioyuk{margin:0;font-size:1rem;line-height:1.5rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;margin-bottom:0.35em;font-weight:500;margin-top:-2px;}</style><div class="MuiTypography-root MuiTypography-body1 MuiTypography-gutterBottom MuiAlertTitle-root css-17ioyuk">重要</div><p class="MuiTypography-root MuiTypography-body1 css-tx8jsd">你正在查看 TiDB v7.2 (<a hreflang="zh" href="/zh/tidb/v7.2/versioning">DMR</a>) 的文档。PingCAP 不提供基于 v7.2 的 bug 修复版本，如有 bug，会在后续版本中修复。如无特殊需求，建议使用 TiDB 数据库的<a hreflang="zh" href="/zh/tidb/stable/release-4.0.9">最新 LTS 版本</a>。</p></div></div></div><h1 id="tidb-409-release-notes" style="position:relative"><a href="#tidb-409-release-notes" aria-label="tidb 409 release notes 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>TiDB 4.0.9 Release Notes</h1><p>发版日期：2020 年 12 月 21 日</p><p>TiDB 版本：4.0.9</p><h2 id="兼容性更改" style="position:relative"><a href="#%E5%85%BC%E5%AE%B9%E6%80%A7%E6%9B%B4%E6%94%B9" aria-label="兼容性更改 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>兼容性更改</h2><ul><li><p>TiDB</p><ul><li>废弃配置文件中 <code>enable-streaming</code> 配置项 <a href="https://github.com/pingcap/tidb/pull/21055" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21055</a></li></ul></li><li><p>TiKV</p><ul><li>减少开启加密时的 I/O 开销和锁冲突。该修改向下不兼容。如果需要降级至 v4.0.9 以下，需要将 <code>security.encryption.enable-file-dictionary-log</code> 配置为 <code>false</code>，并在降级前重启 <a href="https://github.com/tikv/tikv/pull/9195" target="_blank" referrerpolicy="no-referrer-when-downgrade">#9195</a></li></ul></li></ul><h2 id="新功能" style="position:relative"><a href="#%E6%96%B0%E5%8A%9F%E8%83%BD" aria-label="新功能 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>新功能</h2><ul><li><p>TiFlash</p><ul><li>支持将存储引擎的新数据分布在多个硬盘上，分摊 I/O 压力（实验特性）</li></ul></li><li><p>TiDB Dashboard</p><ul><li>SQL 语句分析功能的列表界面支持显示所有字段并排序 <a href="https://github.com/pingcap/tidb-dashboard/pull/749" target="_blank" referrerpolicy="no-referrer-when-downgrade">#749</a></li><li>集群拓扑页面支持缩放 <a href="https://github.com/pingcap/tidb-dashboard/pull/772" target="_blank" referrerpolicy="no-referrer-when-downgrade">#772</a></li><li>SQL 语句分析及慢日志页面支持显示 SQL 语句的临时存储占用大小 <a href="https://github.com/pingcap/tidb-dashboard/pull/777" target="_blank" referrerpolicy="no-referrer-when-downgrade">#777</a></li><li>SQL 语句分析及慢日志列表界面支持导出列表数据 <a href="https://github.com/pingcap/tidb-dashboard/pull/778" target="_blank" referrerpolicy="no-referrer-when-downgrade">#778</a></li><li>支持配置自定义 Prometheus 地址 <a href="https://github.com/pingcap/tidb-dashboard/pull/808" target="_blank" referrerpolicy="no-referrer-when-downgrade">#808</a></li><li>新增集群实例统计摘要页面 <a href="https://github.com/pingcap/tidb-dashboard/pull/815" target="_blank" referrerpolicy="no-referrer-when-downgrade">#815</a></li><li>慢日志详情页面新增更多时间字段 <a href="https://github.com/pingcap/tidb-dashboard/pull/810" target="_blank" referrerpolicy="no-referrer-when-downgrade">#810</a></li></ul></li></ul><h2 id="优化提升" style="position:relative"><a href="#%E4%BC%98%E5%8C%96%E6%8F%90%E5%8D%87" aria-label="优化提升 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>优化提升</h2><ul><li><p>TiDB</p><ul><li>在转换等值条件为其它条件时，通过使用启发式规则，避免生成 (index) merge join 以得到更好的执行计划 <a href="https://github.com/pingcap/tidb/pull/21146" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21146</a></li><li>区分用户变量的类型 <a href="https://github.com/pingcap/tidb/pull/21107" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21107</a></li><li>在配置文件中添加了 <code>performance.gogc</code> 配置项，用于设置 <code>GOGC</code> <a href="https://github.com/pingcap/tidb/pull/20922" target="_blank" referrerpolicy="no-referrer-when-downgrade">#20922</a></li><li>提升 <code>Timestamp</code> 和 <code>Datetime</code> 类型的二进制输出结果与 MySQL 的兼容性 <a href="https://github.com/pingcap/tidb/pull/21135" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21135</a></li><li>优化用户使用 <code>LOCK IN SHARE MODE</code> SQL 语句时输出的报错信息 <a href="https://github.com/pingcap/tidb/pull/21005" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21005</a></li><li>优化在可剪切的表达式进行常量折叠时输出的错误信息，避免输出不必要的警告或错误信息 <a href="https://github.com/pingcap/tidb/pull/21040" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21040</a></li><li>优化 <code>LOAD DATA</code> 语句执行 <code>PREPARE</code> 时的报错信息 <a href="https://github.com/pingcap/tidb/pull/21199" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21199</a></li><li>修改整型列的类型时，忽略掉整型字段的零值填充的属性 <a href="https://github.com/pingcap/tidb/pull/20986" target="_blank" referrerpolicy="no-referrer-when-downgrade">#20986</a></li><li>在 <code>EXPLAIN ANALYZE</code> 结果中输出 DML 语句执行器相关运行时的信息 <a href="https://github.com/pingcap/tidb/pull/21066" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21066</a></li><li>禁止在一条语句中对主键做出多次不同的修改 <a href="https://github.com/pingcap/tidb/pull/21113" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21113</a></li><li>添加连接空闲时间的监控项 <a href="https://github.com/pingcap/tidb/pull/21301" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21301</a></li><li>新增运行 <code>runtime/trace</code> 分析工具时系统自动临时开启慢日志的功能 <a href="https://github.com/pingcap/tidb/pull/20578" target="_blank" referrerpolicy="no-referrer-when-downgrade">#20578</a></li></ul></li><li><p>TiKV</p><ul><li>添加标记以跟踪 <code>split</code> 命令的来源 <a href="https://github.com/tikv/tikv/pull/8936" target="_blank" referrerpolicy="no-referrer-when-downgrade">#8936</a></li><li>支持动态修改 <code>pessimistic-txn.pipelined</code> 配置项 <a href="https://github.com/tikv/tikv/pull/9100" target="_blank" referrerpolicy="no-referrer-when-downgrade">#9100</a></li><li>减少运行 Backup &amp; Restore 和 TiDB Lightning 时对系统的性能影响 <a href="https://github.com/tikv/tikv/pull/9098" target="_blank" referrerpolicy="no-referrer-when-downgrade">#9098</a></li><li>添加 Ingesting SST 报错的监控项 <a href="https://github.com/tikv/tikv/pull/9096" target="_blank" referrerpolicy="no-referrer-when-downgrade">#9096</a></li><li>阻止 Leader 在任意副本需要复制日志时进入休眠状态 <a href="https://github.com/tikv/tikv/pull/9093" target="_blank" referrerpolicy="no-referrer-when-downgrade">#9093</a></li><li>提高 Pipelined locking 的成功率 <a href="https://github.com/tikv/tikv/pull/9086" target="_blank" referrerpolicy="no-referrer-when-downgrade">#9086</a></li><li>调整配置项 <code>apply-max-batch-size</code> 和 <code>store-max-batch-size</code> 的默认值为 <code>1024</code> <a href="https://github.com/tikv/tikv/pull/9020" target="_blank" referrerpolicy="no-referrer-when-downgrade">#9020</a></li><li>添加 <code>max-background-flushes</code> 配置 <a href="https://github.com/tikv/tikv/pull/8947" target="_blank" referrerpolicy="no-referrer-when-downgrade">#8947</a></li><li>默认关闭 RocksDB consistency check 以提高性能 <a href="https://github.com/tikv/tikv/pull/9029" target="_blank" referrerpolicy="no-referrer-when-downgrade">#9029</a></li><li>将 Region 大小的查询操作移出 <code>pd heartbeat worker</code> 以减轻其压力 <a href="https://github.com/tikv/tikv/pull/9185" target="_blank" referrerpolicy="no-referrer-when-downgrade">#9185</a></li></ul></li><li><p>PD</p><ul><li>TiKV store 转变为 <code>Tombstone</code> 状态时检查 TiKV 集群的版本号，防止用户降级和升级过程中的开启不兼容特性<a href="https://github.com/pingcap/pd/pull/3213" target="_blank" referrerpolicy="no-referrer-when-downgrade">#3213</a></li><li>禁止低版本的 TiKV 强制从 <code>Tombstone</code> 状态转为 <code>Up</code> <a href="https://github.com/pingcap/pd/pull/3206" target="_blank" referrerpolicy="no-referrer-when-downgrade">#3206</a></li></ul></li><li><p>TiDB Dashboard</p><ul><li>对于 SQL 语句文本点击 “展开” 后支持保持展开状态 <a href="https://github.com/pingcap/tidb-dashboard/pull/775" target="_blank" referrerpolicy="no-referrer-when-downgrade">#775</a></li><li>默认在新窗口打开 SQL 语句分析和慢日志详情 <a href="https://github.com/pingcap/tidb-dashboard/pull/816" target="_blank" referrerpolicy="no-referrer-when-downgrade">#816</a></li><li>改进慢日志页面部分时间字段描述 <a href="https://github.com/pingcap/tidb-dashboard/pull/817" target="_blank" referrerpolicy="no-referrer-when-downgrade">#817</a></li><li>改进错误信息提示，显示更完整的错误内容 <a href="https://github.com/pingcap/tidb-dashboard/pull/794" target="_blank" referrerpolicy="no-referrer-when-downgrade">#794</a></li></ul></li><li><p>TiFlash</p><ul><li>降低 Replica read 时的延迟</li><li>优化 TiFlash 的错误信息</li><li>优化在大数据量下，对缓存数据大小的限制</li><li>添加正在处理的 Coprocessor 请求数量的 metric</li></ul></li><li><p>Tools</p><ul><li><p>Backup &amp; Restore (BR)</p><ul><li>BR 不再接受存在歧义的 <code>--checksum false</code>（不会正确关闭 checksum）命令行参数，正确用法为 <code>--checksum=false</code> <a href="https://github.com/pingcap/br/pull/588" target="_blank" referrerpolicy="no-referrer-when-downgrade">#588</a></li><li>支持暂时性地调整 PD 的参数，在 BR 意外退出后，PD 能自动恢复回正常参数 <a href="https://github.com/pingcap/br/pull/596" target="_blank" referrerpolicy="no-referrer-when-downgrade">#596</a></li><li>支持恢复数据表的统计信息 <a href="https://github.com/pingcap/br/pull/622" target="_blank" referrerpolicy="no-referrer-when-downgrade">#622</a></li><li>系统自动重试 <code>read index not ready</code> 和 <code>proposal in merging mode</code> 两种错误 <a href="https://github.com/pingcap/br/pull/626" target="_blank" referrerpolicy="no-referrer-when-downgrade">#626</a></li></ul></li><li><p>TiCDC</p><ul><li>添加对 TiKV 开启 Hibernate Region 的告警规则 <a href="https://github.com/pingcap/tiflow/pull/1120" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1120</a></li><li>优化 schema storage 的内存使用 <a href="https://github.com/pingcap/tiflow/pull/1127" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1127</a></li><li>增加 Unified Sorter 功能，可以在数据量较大的情况下提升增量扫阶段的同步速度（实验特性）<a href="https://github.com/pingcap/tiflow/pull/1122" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1122</a></li><li>支持在 TiCDC Open Protocol 中配置单条 Kafka 消息的最大大小和包含的最大行变更数量（仅在 Kafka sink 生效）<a href="https://github.com/pingcap/tiflow/pull/1079" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1079</a></li></ul></li><li><p>Dumpling</p><ul><li>对导出失败部分的数据进行重试 <a href="https://github.com/pingcap/dumpling/pull/182" target="_blank" referrerpolicy="no-referrer-when-downgrade">#182</a></li><li>支持同时设置 <code>-F</code> 和 <code>-r</code> 两个参数 <a href="https://github.com/pingcap/dumpling/pull/177" target="_blank" referrerpolicy="no-referrer-when-downgrade">#177</a></li><li>默认不导出系统表 <a href="https://github.com/pingcap/dumpling/pull/194" target="_blank" referrerpolicy="no-referrer-when-downgrade">#194</a></li><li>在设置 <code>--transactional-consistency</code> 参数时支持重建 MySQL 链接 <a href="https://github.com/pingcap/dumpling/pull/199" target="_blank" referrerpolicy="no-referrer-when-downgrade">#199</a></li><li>支持使用 <code>-c,--compress</code> 参数指定 Dumpling 使用的压缩算法，空字符串代表不压缩 <a href="https://github.com/pingcap/dumpling/pull/202" target="_blank" referrerpolicy="no-referrer-when-downgrade">#202</a></li></ul></li><li><p>TiDB Lightning</p><ul><li>默认不恢复系统表 <a href="https://github.com/pingcap/tidb-lightning/pull/459" target="_blank" referrerpolicy="no-referrer-when-downgrade">#459</a></li><li>支持为 auto-random 的主键设置默认值 <a href="https://github.com/pingcap/tidb-lightning/pull/457" target="_blank" referrerpolicy="no-referrer-when-downgrade">#457</a></li><li>完善 Local 模式下分裂 Region 的精度 <a href="https://github.com/pingcap/tidb-lightning/pull/422" target="_blank" referrerpolicy="no-referrer-when-downgrade">#422</a></li><li>支持给 <code>tikv-importer.region-split-size</code>、<code>mydumper.read-block-size</code>、<code>mydumper.batch-size</code> 和 <code>mydumper.max-region-size</code> 设置可读的参数（比如 "2.5 GiB"）<a href="https://github.com/pingcap/tidb-lightning/pull/471" target="_blank" referrerpolicy="no-referrer-when-downgrade">#471</a></li></ul></li><li><p>TiDB Binlog</p><ul><li>在写下游出错时给 Drainer 设置非零退出码 <a href="https://github.com/pingcap/tidb-binlog/pull/1012" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1012</a></li></ul></li></ul></li></ul><h2 id="bug-修复" style="position:relative"><a href="#bug-%E4%BF%AE%E5%A4%8D" aria-label="bug 修复 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>Bug 修复</h2><ul><li><p>TiDB</p><ul><li>修复了前缀索引和 <code>OR</code> 条件一起使用时结果不正确的问题 <a href="https://github.com/pingcap/tidb/pull/21287" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21287</a></li><li>修复了开启自动重试后可能出现的一处 panic <a href="https://github.com/pingcap/tidb/pull/21285" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21285</a></li><li>修复了根据列类型检查分区表定义时出现的一处问题 <a href="https://github.com/pingcap/tidb/pull/21273" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21273</a></li><li>修复了分区表对于列的类型检查的一处问题。分区表达式的值的类型和分区列的类型必须一致 <a href="https://github.com/pingcap/tidb/pull/21136" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21136</a></li><li>修复了哈希分区表对于分区名唯一性检查的问题 <a href="https://github.com/pingcap/tidb/pull/21257" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21257</a></li><li>修复非 <code>INT</code> 类型的值，插入到哈希分区表后结果不正确的问题 <a href="https://github.com/pingcap/tidb/pull/21238" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21238</a></li><li>修复了在部分写入类的场景中，使用了 index join 会遇到非预期报错的问题 <a href="https://github.com/pingcap/tidb/pull/21249" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21249</a></li><li>修复了在 <code>CASE WHEN</code> 中 <code>BigInt</code> 无符列的值被错误地转换成有符类型的问题 <a href="https://github.com/pingcap/tidb/pull/21236" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21236</a></li><li>修复了 index hash join 和 index merge join 没有考虑 collation 的问题 <a href="https://github.com/pingcap/tidb/pull/21219" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21219</a></li><li>修复了分区表在建表和查询时，没有考虑 collation 的问题 <a href="https://github.com/pingcap/tidb/pull/21181" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21181</a></li><li>修复了慢日志记录的查询结果可能不全的问题 <a href="https://github.com/pingcap/tidb/pull/21211" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21211</a></li><li>修复了一处数据库名大小写处理不当，导致的 <code>DELETE</code> 未正确删除数据的问题 <a href="https://github.com/pingcap/tidb/pull/21206" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21206</a></li><li>修复了执行 DML 语句导致 schema 的内存被覆盖的问题 <a href="https://github.com/pingcap/tidb/pull/21050" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21050</a></li><li>修复了使用 join 时，无法查询到合并后的列的问题 <a href="https://github.com/pingcap/tidb/pull/21021" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21021</a></li><li>修复了一些 semi-join 的查询结果不正确的问题 <a href="https://github.com/pingcap/tidb/pull/21019" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21019</a></li><li>修复了表锁对于 <code>UPDATE</code> 语句不生效的问题 <a href="https://github.com/pingcap/tidb/pull/21002" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21002</a></li><li>修复创建递归的视图出现栈溢出的问题 <a href="https://github.com/pingcap/tidb/pull/21001" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21001</a></li><li>修复了 index merge join 在执行外连接的时候，结果不符合预期的问题 <a href="https://github.com/pingcap/tidb/pull/20954" target="_blank" referrerpolicy="no-referrer-when-downgrade">#20954</a></li><li>修复了一处事务问题，该场景下应该返回结果未知，但是却返回了执行失败 <a href="https://github.com/pingcap/tidb/pull/20925" target="_blank" referrerpolicy="no-referrer-when-downgrade">#20925</a></li><li>修复 <code>explain for connection</code> 无法显示最后一次执行计划的问题 <a href="https://github.com/pingcap/tidb/pull/21315" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21315</a></li><li>修复在 Read Committed 隔离级别下，Index Merge 结果不正确的问题 <a href="https://github.com/pingcap/tidb/pull/21253" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21253</a></li><li>修复了由于事务写冲突重试导致的 auto-ID 分配失败 <a href="https://github.com/pingcap/tidb/pull/21079" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21079</a></li><li>修复了 JSON 数据无法通过 <code>load data</code> 无法正确导入到 TiDB 的问题 <a href="https://github.com/pingcap/tidb/pull/21074" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21074</a></li><li>修复新增加 <code>Enum</code> 类型列的默认值问题 <a href="https://github.com/pingcap/tidb/pull/20998" target="_blank" referrerpolicy="no-referrer-when-downgrade">#20998</a></li><li>对于日期类型的数学计算，保留原始的数据类型信息，修复 <code>adddate</code> 函数插入非法值的问题 <a href="https://github.com/pingcap/tidb/pull/21176" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21176</a></li><li>修复了部分场景错误地生成了 <code>PointGet</code> 的执行计划，导致执行结果不正确 <a href="https://github.com/pingcap/tidb/pull/21244" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21244</a></li><li>在 <code>ADD_DATE</code> 函数中忽略夏令时的转换，以和 MySQL 兼容 <a href="https://github.com/pingcap/tidb/pull/20888" target="_blank" referrerpolicy="no-referrer-when-downgrade">#20888</a></li><li>修复了插入尾部带有超出 <code>varchar</code> 和 <code>char</code> 长度限制的空白字符的字符串时报错的 bug <a href="https://github.com/pingcap/tidb/pull/21282" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21282</a></li><li>修复了对比 <code>int</code> 和 <code>year</code> 类型时没有将 <code>[1, 69]</code> 的整数转换为 <code>[2001, 2060]</code> 以及没有将 <code>[70, 99]</code> 的整数转换为 <code>[1970, 1999]</code> 的兼容性 bug <a href="https://github.com/pingcap/tidb/pull/21283" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21283</a></li><li>修复了 <code>sum()</code> 函数计算 <code>Double</code> 类型字段的结果溢出导致 panic 的问题 <a href="https://github.com/pingcap/tidb/pull/21272" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21272</a></li><li>修复了 <code>DELETE</code> 语句未能给 unique key 加悲观锁的问题 <a href="https://github.com/pingcap/tidb/pull/20705" target="_blank" referrerpolicy="no-referrer-when-downgrade">#20705</a></li><li>修复了快照读能够命中 lock cache，返回错误结果的问题 <a href="https://github.com/pingcap/tidb/pull/21539" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21539</a></li><li>修复了在同一个事务中读取大量数据时可能发生的内存泄漏问题 <a href="https://github.com/pingcap/tidb/pull/21129" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21129</a></li><li>修复了在子查询中省略表别名时的语法解析错误问题 <a href="https://github.com/pingcap/tidb/pull/20367" target="_blank" referrerpolicy="no-referrer-when-downgrade">#20367</a></li><li>修复了查询中 <code>IN</code> 函数的参数为 time 类型时可能返回错误结果的问题 <a href="https://github.com/pingcap/tidb/issues/21290" target="_blank" referrerpolicy="no-referrer-when-downgrade">#21290</a></li></ul></li><li><p>TiKV</p><ul><li>修复当列个数大于 255 时，下推返回错误结果集的问题 <a href="https://github.com/tikv/tikv/pull/9131" target="_blank" referrerpolicy="no-referrer-when-downgrade">#9131</a></li><li>修复网络隔离时 Region Merge 可能会导致数据丢失的问题 <a href="https://github.com/tikv/tikv/pull/9108" target="_blank" referrerpolicy="no-referrer-when-downgrade">#9108</a></li><li>修复使用 <code>latin1</code> 字符集时，<code>ANALYZE</code> 语句会导致 panic 的问题 <a href="https://github.com/tikv/tikv/pull/9082" target="_blank" referrerpolicy="no-referrer-when-downgrade">#9082</a></li><li>修复类型转换中将数字转成时间会得到错误结果的问题 <a href="https://github.com/tikv/tikv/pull/9031" target="_blank" referrerpolicy="no-referrer-when-downgrade">#9031</a></li><li>修复当开启加密时无法使用 TiDB Lightning 导入数据的问题 <a href="https://github.com/tikv/tikv/pull/8995" target="_blank" referrerpolicy="no-referrer-when-downgrade">#8995</a></li><li>修复使用 <code>0.0.0.0</code> 时 <code>advertise-status-addr</code> 异常的问题 <a href="https://github.com/tikv/tikv/pull/9036" target="_blank" referrerpolicy="no-referrer-when-downgrade">#9036</a></li><li>修复当事务删除 key 时却报 key 已存在的问题 <a href="https://github.com/tikv/tikv/pull/8930" target="_blank" referrerpolicy="no-referrer-when-downgrade">#8930</a></li><li>修复 RocksDB cache 映射错误导致的数据错误问题 <a href="https://github.com/tikv/tikv/pull/9029" target="_blank" referrerpolicy="no-referrer-when-downgrade">#9029</a></li><li>修复当 Leader 切换时 Follower Read 可能返回旧数据的问题 <a href="https://github.com/tikv/tikv/pull/9240" target="_blank" referrerpolicy="no-referrer-when-downgrade">#9240</a></li><li>修复悲观锁下可能读到旧值的问题 <a href="https://github.com/tikv/tikv/pull/9282" target="_blank" referrerpolicy="no-referrer-when-downgrade">#9282</a></li><li>修复 transfer leader 后 replica read 可能会读到旧值的问题 <a href="https://github.com/tikv/tikv/pull/9240" target="_blank" referrerpolicy="no-referrer-when-downgrade">#9240</a></li><li>修复 TiKV 在 profiling 结束后再收到 <code>SIGPROF</code> 会 panic 的问题 <a href="https://github.com/tikv/tikv/pull/9229" target="_blank" referrerpolicy="no-referrer-when-downgrade">#9229</a></li></ul></li><li><p>PD</p><ul><li>修复在特殊情况下 Placement Rule 指定的 leader 绑定不生效的问题 <a href="https://github.com/pingcap/pd/pull/3208" target="_blank" referrerpolicy="no-referrer-when-downgrade">#3208</a></li><li>修复 <code>trace-region-flow</code> 在配置更新时被置为 <code>false</code> 的问题 <a href="https://github.com/pingcap/pd/pull/3120" target="_blank" referrerpolicy="no-referrer-when-downgrade">#3120</a></li><li>修复特殊情况下 safepoint 有无限 TTL 的问题 <a href="https://github.com/pingcap/pd/pull/3143" target="_blank" referrerpolicy="no-referrer-when-downgrade">#3143</a></li></ul></li><li><p>TiDB Dashboard</p><ul><li>修复部分时间显示混杂中英文的问题 <a href="https://github.com/pingcap/tidb-dashboard/pull/755" target="_blank" referrerpolicy="no-referrer-when-downgrade">#755</a></li><li>修复部分不兼容的浏览器中没有提示不兼容的问题 <a href="https://github.com/pingcap/tidb-dashboard/pull/776" target="_blank" referrerpolicy="no-referrer-when-downgrade">#776</a></li><li>修复部分情况下事务时间戳显示不正确的问题 <a href="https://github.com/pingcap/tidb-dashboard/pull/793" target="_blank" referrerpolicy="no-referrer-when-downgrade">#793</a></li><li>修复部分 SQL 文本格式化后成为无效 SQL 语句的问题 <a href="https://github.com/pingcap/tidb-dashboard/pull/805" target="_blank" referrerpolicy="no-referrer-when-downgrade">#805</a></li></ul></li><li><p>TiFlash</p><ul><li>修复 <code>INFORMATION_SCHEMA.CLUSTER_HARDWARE</code> 中可能包含未被使用的硬盘信息的问题</li><li>修复 Delta cache 内存占用量估算偏少的问题</li><li>修复由线程统计信息引起的内存泄露问题</li></ul></li><li><p>Tools</p><ul><li><p>Backup &amp; Restore (BR)</p><ul><li>修复因 S3 secret access keys 中存在特殊字符而导致失败的问题 <a href="https://github.com/pingcap/br/pull/617" target="_blank" referrerpolicy="no-referrer-when-downgrade">#617</a></li></ul></li><li><p>TiCDC</p><ul><li>修复某些异常情况下存在多个 Owner 的问题 <a href="https://github.com/pingcap/tiflow/pull/1104" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1104</a></li><li>修复在 TiKV 节点意外退出或重启恢复情况下 TiCDC 不能正常同步的问题，该 bug 在 v4.0.8 引入 <a href="https://github.com/pingcap/tiflow/pull/1198" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1198</a></li><li>修复在表初始化过程中会向 etcd 中重复写入元数据的问题 <a href="https://github.com/pingcap/tiflow/pull/1191" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1191</a></li><li>修复 schema storage 缓存 TiDB 表信息的过程中因更新表信息延迟或过早 GC 导致同步中断的问题 <a href="https://github.com/pingcap/tiflow/pull/1114" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1114</a></li><li>修复 schema storage 在 DDL 频繁的情况下会消耗过多内存的问题 <a href="https://github.com/pingcap/tiflow/pull/1127" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1127</a></li><li>修复在同步任务暂停或取消之后会产生 goroutine 泄露的问题 <a href="https://github.com/pingcap/tiflow/pull/1075" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1075</a></li><li>增加 Kafka producer 最大重试时间到 600s，避免在下游 Kafka 服务或网络抖动情况下同步中断 <a href="https://github.com/pingcap/tiflow/pull/1118" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1118</a></li><li>修复 Kafka 消息所包含行变更数量不能正常生效的问题 <a href="https://github.com/pingcap/tiflow/pull/1112" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1112</a></li><li>修复当 TiCDC 与 PD 间网络出现抖动，并且同时操作 TiCDC changefeed 暂停和恢复，可能会出现部分表数据没有被同步的问题 <a href="https://github.com/pingcap/tiflow/pull/1213" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1213</a></li><li>修复 TiCDC 与 PD 网络不稳定情况下 TiCDC 可能出现进程非预期退出的问题 <a href="https://github.com/pingcap/tiflow/pull/1218" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1218</a></li><li>在 TiCDC 内部使用全局 PD client，以及修复 PD client 被错误关闭导致同步阻塞的问题 <a href="https://github.com/pingcap/tiflow/pull/1217" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1217</a></li><li>修复 TiCDC owner 节点可能在 etcd watch client 里消耗过多内存的问题 <a href="https://github.com/pingcap/tiflow/pull/1224" target="_blank" referrerpolicy="no-referrer-when-downgrade">#1224</a></li></ul></li><li><p>Dumpling</p><ul><li>修复在某些情况下 MySQL 链接关闭导致 Dumpling 卡住的问题 <a href="https://github.com/pingcap/dumpling/pull/190" target="_blank" referrerpolicy="no-referrer-when-downgrade">#190</a></li></ul></li><li><p>TiDB Lightning</p><ul><li>修复使用错误信息编码 key 的问题 <a href="https://github.com/pingcap/tidb-lightning/pull/437" target="_blank" referrerpolicy="no-referrer-when-downgrade">#437</a></li><li>修复 GC life time TTL 不生效的问题 <a href="https://github.com/pingcap/tidb-lightning/pull/448" target="_blank" referrerpolicy="no-referrer-when-downgrade">#448</a></li><li>修复手动关闭时可能出现的 panic 问题 <a href="https://github.com/pingcap/tidb-lightning/pull/484" target="_blank" referrerpolicy="no-referrer-when-downgrade">#484</a></li></ul></li></ul></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 - 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