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class="breadcrumbs__item"><a aria-label="主页面" class="breadcrumbs__link" href="/zh-CN/"><svg viewBox="0 0 24 24" class="breadcrumbHomeIcon_YNFT"><path d="M10 19v-5h4v5c0 .55.45 1 1 1h3c.55 0 1-.45 1-1v-7h1.7c.46 0 .68-.57.33-.87L12.67 3.6c-.38-.34-.96-.34-1.34 0l-8.36 7.53c-.34.3-.13.87.33.87H5v7c0 .55.45 1 1 1h3c.55 0 1-.45 1-1z" fill="currentColor"></path></svg></a></li><li class="breadcrumbs__item"><span class="breadcrumbs__link">SQL 手册</span><meta itemprop="position" content="1"></li><li class="breadcrumbs__item"><span class="breadcrumbs__link">SQL 手册</span><meta itemprop="position" content="2"></li><li class="breadcrumbs__item"><span class="breadcrumbs__link">DML</span><meta itemprop="position" content="3"></li><li class="breadcrumbs__item"><span class="breadcrumbs__link">Load</span><meta itemprop="position" content="4"></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">MULTI-LOAD</span><meta itemprop="position" content="5"></li></ul></nav><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">本页总览</button></div><div class="theme-doc-markdown markdown"><header><h1>MULTI-LOAD</h1></header><h2 class="anchor anchorWithStickyNavbar_LWe7" id="multi-load">MULTI-LOAD<a href="#multi-load" class="hash-link" aria-label="MULTI-LOAD的直接链接" title="MULTI-LOAD的直接链接"></a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="name">Name<a href="#name" class="hash-link" aria-label="Name的直接链接" title="Name的直接链接"></a></h3><p>MULTI LOAD</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="description">Description<a href="#description" class="hash-link" aria-label="Description的直接链接" title="Description的直接链接"></a></h3><p>用户通过 HTTP 协议提交多个导入作业。Multi Load 可以保证多个导入作业的原子生效</p><div class="codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#F8F8F2;--prism-background-color:#282A36"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-text codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#F8F8F2"><span class="token plain">Syntax:</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> curl --location-trusted -u user:passwd -XPOST http://host:port/api/{db}/_multi_start?label=xxx</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> curl --location-trusted -u user:passwd -T data.file http://host:port/api/{db}/{table1}/_load?label=xxx\&sub_label=yyy</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> curl --location-trusted -u user:passwd -T data.file http://host:port/api/{db}/{table2}/_load?label=xxx\&sub_label=zzz</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> curl --location-trusted -u user:passwd -XPOST http://host:port/api/{db}/_multi_commit?label=xxx</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> curl --location-trusted -u user:passwd -XPOST http://host:port/api/{db}/_multi_desc?label=xxx</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain">'MULTI LOAD'在'MINI LOAD'的基础上，可以支持用户同时向多个表进行导入，具体的命令如上面所示</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain">'/api/{db}/_multi_start' 开始一个多表导入任务</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain">'/api/{db}/{table}/_load' 向一个导入任务添加一个要导入的表，与'MINI LOAD'的主要区别是，需要传入'sub_label'参数</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain">'/api/{db}/_multi_commit' 提交整个多表导入任务，后台开始进行处理</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain">'/api/{db}/_multi_abort' 放弃一个多表导入任务</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain">'/api/{db}/_multi_desc' 可以展示某个多表导入任务已经提交的作业数</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain">HTTP协议相关说明</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 权限认证 当前 Doris 使用http的Basic方式权限认证。所以在导入的时候需要指定用户名密码</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 这种方式是明文传递密码的，鉴于我们当前都是内网环境。。。</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> Expect Doris 需要发送过来的http请求，需要有'Expect'头部信息，内容为'100-continue'</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 为什么呢？因为我们需要将请求进行redirect，那么必须在传输数据内容之前，</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 这样可以避免造成数据的多次传输，从而提高效率。</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> Content-Length Doris 需要在发送请求是带有'Content-Length'这个头部信息。如果发送的内容比</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 'Content-Length'要少，那么Palo认为传输出现问题，则提交此次任务失败。</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> NOTE: 如果，发送的数据比'Content-Length'要多，那么 Doris 只读取'Content-Length'</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 长度的内容，并进行导入</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain">参数说明：</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> user: 用户如果是在default_cluster中的，user即为user_name。否则为user_name@cluster_name。</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> label: 用于指定这一批次导入的label号，用于后期进行作业状态查询等。</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 这个参数是必须传入的。</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> sub_label: 用于指定一个多表导入任务内部的子版本号。对于多表导入的load， 这个参数是必须传入的。</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> columns: 用于描述导入文件中对应的列名字。</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 如果不传入，那么认为文件中的列顺序与建表的顺序一致，</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 指定的方式为逗号分隔，例如：columns=k1,k2,k3,k4</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> column_separator: 用于指定列与列之间的分隔符，默认的为'\t'</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> NOTE: 需要进行url编码，譬如需要指定'\t'为分隔符，</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 那么应该传入'column_separator=%09'</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> max_filter_ratio: 用于指定允许过滤不规范数据的最大比例，默认是0，不允许过滤</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 自定义指定应该如下：'max_filter_ratio=0.2'，含义是允许20%的错误率</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 在'_multi_start'时传入有效果</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain">NOTE: </span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 1. 此种导入方式当前是在一台机器上完成导入工作，因而不宜进行数据量较大的导入工作。</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 建议导入数据量不要超过1GB</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 2. 当前无法使用`curl -T "{file1, file2}"`这样的方式提交多个文件，因为curl是将其拆成多个</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 请求发送的，多个请求不能共用一个label号，所以无法使用</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 3. 支持类似streaming的方式使用curl来向 Doris 中导入数据，但是，只有等这个streaming结束后 Doris</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 才会发生真实的导入行为，这中方式数据量也不能过大。</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="复制代码到剪贴板" title="复制" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="example">Example<a href="#example" class="hash-link" aria-label="Example的直接链接" title="Example的直接链接"></a></h3><div class="codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#F8F8F2;--prism-background-color:#282A36"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-text codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#F8F8F2"><span class="token plain">1. 将本地文件'testData1'中的数据导入到数据库'testDb'中'testTbl1'的表，并且</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain">把'testData2'的数据导入到'testDb'中的表'testTbl2'(用户是defalut_cluster中的)</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> curl --location-trusted -u root -XPOST http://host:port/api/testDb/_multi_start?label=123</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> curl --location-trusted -u root -T testData1 http://host:port/api/testDb/testTbl1/_load?label=123\&sub_label=1</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> curl --location-trusted -u root -T testData2 http://host:port/api/testDb/testTbl2/_load?label=123\&sub_label=2</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> curl --location-trusted -u root -XPOST http://host:port/api/testDb/_multi_commit?label=123</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain">2. 多表导入中途放弃(用户是defalut_cluster中的)</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> curl --location-trusted -u root -XPOST http://host:port/api/testDb/_multi_start?label=123</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> curl --location-trusted -u root -T testData1 http://host:port/api/testDb/testTbl1/_load?label=123\&sub_label=1</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> curl --location-trusted -u root -XPOST http://host:port/api/testDb/_multi_abort?label=123</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain">3. 多表导入查看已经提交多少内容(用户是defalut_cluster中的)</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> curl --location-trusted -u root -XPOST http://host:port/api/testDb/_multi_start?label=123</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> curl --location-trusted -u root -T testData1 http://host:port/api/testDb/testTbl1/_load?label=123\&sub_label=1</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> curl --location-trusted -u root -XPOST http://host:port/api/testDb/_multi_desc?label=123</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="复制代码到剪贴板" title="复制" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" 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