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class="vp-sidebar-title">工具体系</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">应用编程接口</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable active" type="button"><!----><span class="vp-sidebar-title">系统集成</span><span class="vp-arrow down"></span></button><ul class="vp-sidebar-links"><li><a class="route-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.2.x/Ecosystem-Integration/Grafana-Plugin.html" aria-label="Grafana-Plugin"><!---->Grafana-Plugin<!----></a></li><li><a class="route-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.2.x/Ecosystem-Integration/Grafana-Connector.html" aria-label="Grafana-IoTDB-Connector"><!---->Grafana-IoTDB-Connector<!----></a></li><li><a class="route-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.2.x/Ecosystem-Integration/Zeppelin-IoTDB.html" aria-label="Zeppelin-IoTDB-Connector"><!---->Zeppelin-IoTDB-Connector<!----></a></li><li><a class="route-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.2.x/Ecosystem-Integration/Spark-TsFile.html" aria-label="Spark-TsFile-Connector"><!---->Spark-TsFile-Connector<!----></a></li><li><a class="route-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.2.x/Ecosystem-Integration/Spark-IoTDB.html" aria-label="Spark-IoTDB-Connector"><!---->Spark-IoTDB-Connector<!----></a></li><li><a class="route-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.2.x/Ecosystem-Integration/Hive-TsFile.html" aria-label="Hive-TsFile-Connector"><!---->Hive-TsFile-Connector<!----></a></li><li><a class="route-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.2.x/Ecosystem-Integration/Flink-IoTDB.html" aria-label="Flink-IoTDB-Connector"><!---->Flink-IoTDB-Connector<!----></a></li><li><a class="route-link nav-link active vp-sidebar-link vp-sidebar-page active" href="/zh/UserGuide/V1.2.x/Ecosystem-Integration/Flink-SQL-IoTDB.html" aria-label="Flink-SQL-IoTDB-Connector"><!---->Flink-SQL-IoTDB-Connector<!----></a></li><li><a class="route-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.2.x/Ecosystem-Integration/Flink-TsFile.html" aria-label="Flink-TsFile-Connector"><!---->Flink-TsFile-Connector<!----></a></li><li><a class="route-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.2.x/Ecosystem-Integration/NiFi-IoTDB.html" aria-label="NiFi-IoTDB-Connector"><!---->NiFi-IoTDB-Connector<!----></a></li><li><a class="route-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.2.x/Ecosystem-Integration/DBeaver.html" aria-label="DBeaver-IoTDB 集成方案"><!---->DBeaver-IoTDB 集成方案<!----></a></li><li><a class="route-link nav-link vp-sidebar-link vp-sidebar-page" href="/zh/UserGuide/V1.2.x/Ecosystem-Integration/Telegraf-IoTDB.html" aria-label="Telegraf-IoTDB Output 插件"><!---->Telegraf-IoTDB Output 插件<!----></a></li></ul></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">SQL手册</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">FAQ</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">参考</span><span class="vp-arrow end"></span></button><!----></section></li></ul><!--[--><!----><!--]--></aside><!--[--><main id="main-content" class="vp-page"><!--[--><!--[--><!----><!--]--><!----><nav class="vp-breadcrumb disable"></nav><div 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364.8h-44.8V128c0-17.067-14.933-32-32-32H281.6c-17.067 0-32 14.933-32 32v236.8h-44.8C145.067 364.8 96 413.867 96 473.6v192c0 59.733 49.067 108.8 108.8 108.8h44.8V896c0 17.067 14.933 32 32 32h460.8c17.067 0 32-14.933 32-32V774.4h44.8c59.733 0 108.8-49.067 108.8-108.8v-192c0-59.733-49.067-108.8-108.8-108.8zM313.6 160h396.8v204.8H313.6V160zm396.8 704H313.6V620.8h396.8V864zM864 665.6c0 25.6-19.2 44.8-44.8 44.8h-44.8V588.8c0-17.067-14.933-32-32-32H281.6c-17.067 0-32 14.933-32 32v121.6h-44.8c-25.6 0-44.8-19.2-44.8-44.8v-192c0-25.6 19.2-44.8 44.8-44.8h614.4c25.6 0 44.8 19.2 44.8 44.8v192z"></path></svg></button><div class="arrow end"></div></div><div class="vp-toc-wrapper"><ul class="vp-toc-list"><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level2" href="#读写模式">读写模式</a></li><li><ul class="vp-toc-list"><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#读模式-source">读模式（Source）</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#写模式-sink">写模式（Sink）</a></li><!----><!--]--></ul></li><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level2" href="#使用方式">使用方式</a></li><li><ul class="vp-toc-list"><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#maven">Maven</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#sql-client">sql-client</a></li><!----><!--]--></ul></li><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level2" href="#表结构规范">表结构规范</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level2" href="#读模式-source-1">读模式（Source）</a></li><li><ul class="vp-toc-list"><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#scan-table-bounded">Scan Table (Bounded)</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#lookup-point">Lookup Point</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#cdc">CDC</a></li><!----><!--]--></ul></li><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level2" href="#写模式-sink-1">写模式（Sink）</a></li><li><ul class="vp-toc-list"><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#streaming-sink">Streaming Sink</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#batch-sink">Batch Sink</a></li><!----><!--]--></ul></li><!--]--></ul><div class="vp-toc-marker" style="top:-1.7rem;"></div></div><!--[--><!----><!--]--></aside></div><!--[--><!----><!--]--><div class="theme-hope-content"><h1 id="flink-sql-iotdb-connector" tabindex="-1"><a class="header-anchor" href="#flink-sql-iotdb-connector"><span>flink-sql-iotdb-connector</span></a></h1><p>flink-sql-iotdb-connector 将 Flink SQL 或者 Flink Table 与 IoTDB 无缝衔接了起来，使得在 Flink 的任务中可以对 IoTDB 进行实时读写，具体可以应用到如下场景中：</p><ol><li>实时数据同步：将数据从一个数据库实时同步到另一个数据库。</li><li>实时数据管道：构建实时数据处理管道，处理和分析数据库中的数据。</li><li>实时数据分析：实时分析数据库中的数据，提供实时的业务洞察。</li><li>实时应用：将数据库中的数据实时应用于实时应用程序，如实时报表、实时推荐等。</li><li>实时监控：实时监控数据库中的数据，检测异常和错误。</li></ol><h2 id="读写模式" tabindex="-1"><a class="header-anchor" href="#读写模式"><span>读写模式</span></a></h2><table><thead><tr><th>读模式（Source）</th><th>写模式（Sink）</th></tr></thead><tbody><tr><td>Bounded Scan, Lookup, CDC</td><td>Streaming Sink, Batch Sink</td></tr></tbody></table><h3 id="读模式-source" tabindex="-1"><a class="header-anchor" href="#读模式-source"><span>读模式（Source）</span></a></h3><ul><li><p><strong>Bounded Scan：</strong> bounded scan 的主要实现方式是通过指定 <code>时间序列</code> 以及 <code>查询条件的上下界（可选）</code>来进行查询，并且查询结果通常为多行数据。这种查询无法获取到查询之后更新的数据。</p></li><li><p><strong>Lookup：</strong> lookup 查询模式与 scan 查询模式不同，bounded scan 是对一个时间范围内的数据进行查询，而 <code>lookup</code> 查询只会对一个精确的时间点进行查询，所以查询结果只有一行数据。另外只有 <code>lookup join</code> 的右表才能使用 lookup 查询模式。</p></li><li><p><strong>CDC:</strong> 主要用于 Flink 的 <code>ETL</code> 任务当中。当 IoTDB 中的数据发生变化时，flink 会通过我们提供的 <code>CDC connector</code> 感知到，我们可以将感知到的变化数据转发给其他的外部数据源，以此达到 ETL 的目的。</p></li></ul><h3 id="写模式-sink" tabindex="-1"><a class="header-anchor" href="#写模式-sink"><span>写模式（Sink）</span></a></h3><ul><li><p><strong>Streaming sink：</strong> 用于 Flink 的 streaming mode 中，会将 Flink 中 Dynamic Table 的增删改记录实时的同步到 IoTDB 中。</p></li><li><p><strong>Batch sink：</strong> 用于 Flink 的 batch mode 中，用于将 Flink 的批量计算结果一次性写入 IoTDB 中。</p></li></ul><h2 id="使用方式" tabindex="-1"><a class="header-anchor" href="#使用方式"><span>使用方式</span></a></h2><p>我们提供的 flink-sql-iotdb-connector 总共提供两种使用方式，一种是在项目开发过程中通过 Maven 的方式引用，另外一种是在 Flink 的 sql-client 中使用。我们将分别介绍这两种使用方式。</p><blockquote><p>📌注：flink 版本要求 1.17.0 及以上</p></blockquote><h3 id="maven" tabindex="-1"><a class="header-anchor" href="#maven"><span>Maven</span></a></h3><p>我们只需要在项目的 pom 文件中添加以下依赖即可：</p><div class="language-xml line-numbers-mode" data-ext="xml" data-title="xml"><pre class="language-xml"><code><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>dependency</span><span class="token punctuation">></span></span> |
| <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>groupId</span><span class="token punctuation">></span></span>org.apache.iotdb<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>groupId</span><span class="token punctuation">></span></span> |
| <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>artifactId</span><span class="token punctuation">></span></span>flink-sql-iotdb-connector<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>artifactId</span><span class="token punctuation">></span></span> |
| <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>version</span><span class="token punctuation">></span></span>${iotdb.version}<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>version</span><span class="token punctuation">></span></span> |
| <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>dependency</span><span class="token punctuation">></span></span> |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="sql-client" tabindex="-1"><a class="header-anchor" href="#sql-client"><span>sql-client</span></a></h3><p>如果需要在 sql-client 中使用 flink-sql-iotdb-connector，先通过以下步骤来配置环境：</p><ol><li><p>在 <a href="https://iotdb.apache.org/Download/" target="_blank" rel="noopener noreferrer">官网<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a> 下载带依赖的 flink-sql-iotdb-connector 的 jar 包。</p></li><li><p>将 jar 包拷贝到 <code>$FLINK_HOME/lib</code> 目录下。</p></li><li><p>启动 Flink 集群。</p></li><li><p>启动 sql-client。</p></li></ol><p>此时就可以在 sql-client 中使用 flink-sql-iotdb-connector 了。</p><h2 id="表结构规范" tabindex="-1"><a class="header-anchor" href="#表结构规范"><span>表结构规范</span></a></h2><p>无论使用哪种类型的连接器，都需要满足以下的表结构规范：</p><ul><li>所有使用 <code>IoTDB connector</code> 的表，第一列的列名必须是 <code>Time_</code>，而且数据类型必须是 <code>BIGINT</code> 类型。</li><li>除了 <code>Time_</code> 列以外的列名必须以 <code>root.</code> 开头。另外列名中的任意节点不能是纯数字，如果有纯数字，或者其他非法字符，必须使用反引号扩起来。比如：路径 root.sg.d0.123 是一个非法路径，但是 root.sg.d0.`123` 就是一个合法路径。</li><li>无论使用 <code>pattern</code> 或者 <code>sql</code> 从 IoTDB 中查询数据，查询结果的时间序列名需要包含 Flink 中除了 <code>Time_</code> 以外的所有列名。如果没有查询结果中没有相应的列名，则该列将用 null 去填充。</li><li>flink-sql-iotdb-connector 中支持的数据类型有：<code>INT</code>, <code>BIGINT</code>, <code>FLOAT</code>, <code>DOUBLE</code>, <code>BOOLEAN</code>, <code>STRING</code>。Flink Table 中每一列的数据类型与其 IoTDB 中对应的时间序列类型都要匹配上，否则将会报错，并退出 Flink 任务。</li></ul><p>以下用几个例子来说明 IoTDB 中的时间序列与 Flink Table 中列的对应关系。</p><h2 id="读模式-source-1" tabindex="-1"><a class="header-anchor" href="#读模式-source-1"><span>读模式（Source）</span></a></h2><h3 id="scan-table-bounded" tabindex="-1"><a class="header-anchor" href="#scan-table-bounded"><span>Scan Table (Bounded)</span></a></h3><h4 id="参数" tabindex="-1"><a class="header-anchor" href="#参数"><span>参数</span></a></h4><table><thead><tr><th>参数</th><th>必填</th><th>默认</th><th>类型</th><th>描述</th></tr></thead><tbody><tr><td>nodeUrls</td><td>否</td><td>127.0.0.1:6667</td><td>String</td><td>用来指定 IoTDB 的 datanode 地址，如果 IoTDB 是用集群模式搭建的话，可以指定多个地址，每个节点用逗号隔开。</td></tr><tr><td>user</td><td>否</td><td>root</td><td>String</td><td>IoTDB 用户名</td></tr><tr><td>password</td><td>否</td><td>root</td><td>String</td><td>IoTDB 密码</td></tr><tr><td>scan.bounded.lower-bound</td><td>否</td><td>-1L</td><td>Long</td><td>bounded 的 scan 查询时的时间戳下界（包括），参数大于<code>0</code>时有效。</td></tr><tr><td>scan.bounded.upper-bound</td><td>否</td><td>-1L</td><td>Long</td><td>bounded 的 scan 查询时的时间戳下界（包括），参数大于<code>0</code>时有效。</td></tr><tr><td>sql</td><td>是</td><td>无</td><td>String</td><td>用于在 IoTDB 端做查询。</td></tr></tbody></table><h4 id="示例" tabindex="-1"><a class="header-anchor" href="#示例"><span>示例</span></a></h4><p>该示例演示了如何在一个 Flink Table Job 中从 IoTDB 中通过<code>scan table</code>的方式读取数据：<br> 当前 IoTDB 中的数据如下：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB> select ** from root; |
| +-----------------------------+-------------+-------------+-------------+ |
| | Time|root.sg.d0.s0|root.sg.d1.s0|root.sg.d1.s1| |
| +-----------------------------+-------------+-------------+-------------+ |
| |1970-01-01T08:00:00.001+08:00| 1.0833644| 2.34874| 1.2414109| |
| |1970-01-01T08:00:00.002+08:00| 4.929185| 3.1885583| 4.6980085| |
| |1970-01-01T08:00:00.003+08:00| 3.5206156| 3.5600138| 4.8080945| |
| |1970-01-01T08:00:00.004+08:00| 1.3449302| 2.8781595| 3.3195343| |
| |1970-01-01T08:00:00.005+08:00| 3.3079383| 3.3840187| 3.7278645| |
| +-----------------------------+-------------+-------------+-------------+ |
| Total line number = 5 |
| It costs 0.028s |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><div class="language-java line-numbers-mode" data-ext="java" data-title="java"><pre class="language-java"><code><span class="token keyword">import</span> <span class="token import"><span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>flink<span class="token punctuation">.</span>table<span class="token punctuation">.</span>api<span class="token punctuation">.</span></span><span class="token operator">*</span></span><span class="token punctuation">;</span> |
| |
| <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">BoundedScanTest</span> <span class="token punctuation">{</span> |
| <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">Exception</span> <span class="token punctuation">{</span> |
| <span class="token comment">// setup table environment</span> |
| <span class="token class-name">EnvironmentSettings</span> settings <span class="token operator">=</span> <span class="token class-name">EnvironmentSettings</span> |
| <span class="token punctuation">.</span><span class="token function">newInstance</span><span class="token punctuation">(</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">inStreamingMode</span><span class="token punctuation">(</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token class-name">TableEnvironment</span> tableEnv <span class="token operator">=</span> <span class="token class-name">TableEnvironment</span><span class="token punctuation">.</span><span class="token function">create</span><span class="token punctuation">(</span>settings<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token comment">// setup schema</span> |
| <span class="token class-name">Schema</span> iotdbTableSchema <span class="token operator">=</span> |
| <span class="token class-name">Schema</span><span class="token punctuation">.</span><span class="token function">newBuilder</span><span class="token punctuation">(</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">column</span><span class="token punctuation">(</span><span class="token string">"Time_"</span><span class="token punctuation">,</span> <span class="token class-name">DataTypes</span><span class="token punctuation">.</span><span class="token function">BIGINT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">column</span><span class="token punctuation">(</span><span class="token string">"root.sg.d0.s0"</span><span class="token punctuation">,</span> <span class="token class-name">DataTypes</span><span class="token punctuation">.</span><span class="token function">FLOAT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">column</span><span class="token punctuation">(</span><span class="token string">"root.sg.d1.s0"</span><span class="token punctuation">,</span> <span class="token class-name">DataTypes</span><span class="token punctuation">.</span><span class="token function">FLOAT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">column</span><span class="token punctuation">(</span><span class="token string">"root.sg.d1.s1"</span><span class="token punctuation">,</span> <span class="token class-name">DataTypes</span><span class="token punctuation">.</span><span class="token function">FLOAT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token comment">// register table</span> |
| <span class="token class-name">TableDescriptor</span> iotdbDescriptor <span class="token operator">=</span> |
| <span class="token class-name">TableDescriptor</span><span class="token punctuation">.</span><span class="token function">forConnector</span><span class="token punctuation">(</span><span class="token string">"IoTDB"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">schema</span><span class="token punctuation">(</span>iotdbTableSchema<span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">option</span><span class="token punctuation">(</span><span class="token string">"nodeUrls"</span><span class="token punctuation">,</span> <span class="token string">"127.0.0.1:6667"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">option</span><span class="token punctuation">(</span><span class="token string">"sql"</span><span class="token punctuation">,</span> <span class="token string">"select ** from root"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| tableEnv<span class="token punctuation">.</span><span class="token function">createTemporaryTable</span><span class="token punctuation">(</span><span class="token string">"iotdbTable"</span><span class="token punctuation">,</span> iotdbDescriptor<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token comment">// output table</span> |
| tableEnv<span class="token punctuation">.</span><span class="token function">from</span><span class="token punctuation">(</span><span class="token string">"iotdbTable"</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token punctuation">}</span> |
| <span class="token punctuation">}</span> |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>执行完以上任务后，Flink 的控制台中输出的表如下：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>+----+----------------------+--------------------------------+--------------------------------+--------------------------------+ |
| | op | Time_ | root.sg.d0.s0 | root.sg.d1.s0 | root.sg.d1.s1 | |
| +----+----------------------+--------------------------------+--------------------------------+--------------------------------+ |
| | +I | 1 | 1.0833644 | 2.34874 | 1.2414109 | |
| | +I | 2 | 4.929185 | 3.1885583 | 4.6980085 | |
| | +I | 3 | 3.5206156 | 3.5600138 | 4.8080945 | |
| | +I | 4 | 1.3449302 | 2.8781595 | 3.3195343 | |
| | +I | 5 | 3.3079383 | 3.3840187 | 3.7278645 | |
| +----+----------------------+--------------------------------+--------------------------------+--------------------------------+ |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="lookup-point" tabindex="-1"><a class="header-anchor" href="#lookup-point"><span>Lookup Point</span></a></h3><h4 id="参数-1" tabindex="-1"><a class="header-anchor" href="#参数-1"><span>参数</span></a></h4><table><thead><tr><th>参数</th><th>必填</th><th>默认</th><th>类型</th><th>描述</th></tr></thead><tbody><tr><td>nodeUrls</td><td>否</td><td>127.0.0.1:6667</td><td>String</td><td>用来指定 IoTDB 的 datanode 地址，如果 IoTDB 是用集群模式搭建的话，可以指定多个地址，每个节点用逗号隔开。</td></tr><tr><td>user</td><td>否</td><td>root</td><td>String</td><td>IoTDB 用户名</td></tr><tr><td>password</td><td>否</td><td>root</td><td>String</td><td>IoTDB 密码</td></tr><tr><td>lookup.cache.max-rows</td><td>否</td><td>-1</td><td>Integer</td><td>lookup 查询时，缓存表的最大行数，参数大于<code>0</code>时生效。</td></tr><tr><td>lookup.cache.ttl-sec</td><td>否</td><td>-1</td><td>Integer</td><td>lookup 查询时，单点数据的丢弃时间，单位为<code>秒</code>。</td></tr><tr><td>sql</td><td>是</td><td>无</td><td>String</td><td>用于在 IoTDB 端做查询。</td></tr></tbody></table><h4 id="示例-1" tabindex="-1"><a class="header-anchor" href="#示例-1"><span>示例</span></a></h4><p>该示例演示了如何将 IoTDB 中的<code>device</code>作为维度表进行<code>lookup</code>查询：</p><ul><li>使用 <code>datagen connector</code> 生成两个字段作为 <code>Lookup Join</code> 的左表。第一个字段为自增字段，用来表示时间戳。第二个字段为随机字段，用来表示一个<br> measurement 产生的时间序列。</li><li>通过 <code>IoTDB connector</code> 注册一个表作为 <code>Lookup Join</code> 的右表。</li><li>将两个表 join 起来。</li></ul><p>当前 IoTDB 中的数据如下：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB> select ** from root; |
| +-----------------------------+-------------+-------------+-------------+ |
| | Time|root.sg.d0.s0|root.sg.d1.s0|root.sg.d1.s1| |
| +-----------------------------+-------------+-------------+-------------+ |
| |1970-01-01T08:00:00.001+08:00| 1.0833644| 2.34874| 1.2414109| |
| |1970-01-01T08:00:00.002+08:00| 4.929185| 3.1885583| 4.6980085| |
| |1970-01-01T08:00:00.003+08:00| 3.5206156| 3.5600138| 4.8080945| |
| |1970-01-01T08:00:00.004+08:00| 1.3449302| 2.8781595| 3.3195343| |
| |1970-01-01T08:00:00.005+08:00| 3.3079383| 3.3840187| 3.7278645| |
| +-----------------------------+-------------+-------------+-------------+ |
| Total line number = 5 |
| It costs 0.028s |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><div class="language-java line-numbers-mode" data-ext="java" data-title="java"><pre class="language-java"><code><span class="token keyword">import</span> <span class="token import"><span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>flink<span class="token punctuation">.</span>table<span class="token punctuation">.</span>api<span class="token punctuation">.</span></span><span class="token class-name">DataTypes</span></span><span class="token punctuation">;</span> |
| <span class="token keyword">import</span> <span class="token import"><span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>flink<span class="token punctuation">.</span>table<span class="token punctuation">.</span>api<span class="token punctuation">.</span></span><span class="token class-name">EnvironmentSettings</span></span><span class="token punctuation">;</span> |
| <span class="token keyword">import</span> <span class="token import"><span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>flink<span class="token punctuation">.</span>table<span class="token punctuation">.</span>api<span class="token punctuation">.</span></span><span class="token class-name">Schema</span></span><span class="token punctuation">;</span> |
| <span class="token keyword">import</span> <span class="token import"><span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>flink<span class="token punctuation">.</span>table<span class="token punctuation">.</span>api<span class="token punctuation">.</span></span><span class="token class-name">TableDescriptor</span></span><span class="token punctuation">;</span> |
| <span class="token keyword">import</span> <span class="token import"><span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>flink<span class="token punctuation">.</span>table<span class="token punctuation">.</span>api<span class="token punctuation">.</span></span><span class="token class-name">TableEnvironment</span></span><span class="token punctuation">;</span> |
| |
| <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">LookupTest</span> <span class="token punctuation">{</span> |
| <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span> |
| <span class="token comment">// setup environment</span> |
| <span class="token class-name">EnvironmentSettings</span> settings <span class="token operator">=</span> <span class="token class-name">EnvironmentSettings</span> |
| <span class="token punctuation">.</span><span class="token function">newInstance</span><span class="token punctuation">(</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">inStreamingMode</span><span class="token punctuation">(</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token class-name">TableEnvironment</span> tableEnv <span class="token operator">=</span> <span class="token class-name">TableEnvironment</span><span class="token punctuation">.</span><span class="token function">create</span><span class="token punctuation">(</span>settings<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token comment">// register left table</span> |
| <span class="token class-name">Schema</span> dataGenTableSchema <span class="token operator">=</span> |
| <span class="token class-name">Schema</span><span class="token punctuation">.</span><span class="token function">newBuilder</span><span class="token punctuation">(</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">column</span><span class="token punctuation">(</span><span class="token string">"Time_"</span><span class="token punctuation">,</span> <span class="token class-name">DataTypes</span><span class="token punctuation">.</span><span class="token function">BIGINT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">column</span><span class="token punctuation">(</span><span class="token string">"s0"</span><span class="token punctuation">,</span> <span class="token class-name">DataTypes</span><span class="token punctuation">.</span><span class="token function">INT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token class-name">TableDescriptor</span> datagenDescriptor <span class="token operator">=</span> |
| <span class="token class-name">TableDescriptor</span><span class="token punctuation">.</span><span class="token function">forConnector</span><span class="token punctuation">(</span><span class="token string">"datagen"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">schema</span><span class="token punctuation">(</span>dataGenTableSchema<span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">option</span><span class="token punctuation">(</span><span class="token string">"fields.Time_.kind"</span><span class="token punctuation">,</span> <span class="token string">"sequence"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">option</span><span class="token punctuation">(</span><span class="token string">"fields.Time_.start"</span><span class="token punctuation">,</span> <span class="token string">"1"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">option</span><span class="token punctuation">(</span><span class="token string">"fields.Time_.end"</span><span class="token punctuation">,</span> <span class="token string">"5"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">option</span><span class="token punctuation">(</span><span class="token string">"fields.s0.min"</span><span class="token punctuation">,</span> <span class="token string">"1"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">option</span><span class="token punctuation">(</span><span class="token string">"fields.s0.max"</span><span class="token punctuation">,</span> <span class="token string">"1"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| tableEnv<span class="token punctuation">.</span><span class="token function">createTemporaryTable</span><span class="token punctuation">(</span><span class="token string">"leftTable"</span><span class="token punctuation">,</span> datagenDescriptor<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token comment">// register right table</span> |
| <span class="token class-name">Schema</span> iotdbTableSchema <span class="token operator">=</span> |
| <span class="token class-name">Schema</span><span class="token punctuation">.</span><span class="token function">newBuilder</span><span class="token punctuation">(</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">column</span><span class="token punctuation">(</span><span class="token string">"Time_"</span><span class="token punctuation">,</span> <span class="token class-name">DataTypes</span><span class="token punctuation">.</span><span class="token function">BIGINT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">column</span><span class="token punctuation">(</span><span class="token string">"root.sg.d0.s0"</span><span class="token punctuation">,</span> <span class="token class-name">DataTypes</span><span class="token punctuation">.</span><span class="token function">FLOAT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">column</span><span class="token punctuation">(</span><span class="token string">"root.sg.d1.s0"</span><span class="token punctuation">,</span> <span class="token class-name">DataTypes</span><span class="token punctuation">.</span><span class="token function">FLOAT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">column</span><span class="token punctuation">(</span><span class="token string">"root.sg.d1.s1"</span><span class="token punctuation">,</span> <span class="token class-name">DataTypes</span><span class="token punctuation">.</span><span class="token function">FLOAT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token class-name">TableDescriptor</span> iotdbDescriptor <span class="token operator">=</span> |
| <span class="token class-name">TableDescriptor</span><span class="token punctuation">.</span><span class="token function">forConnector</span><span class="token punctuation">(</span><span class="token string">"IoTDB"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">schema</span><span class="token punctuation">(</span>iotdbTableSchema<span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">option</span><span class="token punctuation">(</span><span class="token string">"sql"</span><span class="token punctuation">,</span> <span class="token string">"select ** from root"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| tableEnv<span class="token punctuation">.</span><span class="token function">createTemporaryTable</span><span class="token punctuation">(</span><span class="token string">"rightTable"</span><span class="token punctuation">,</span> iotdbDescriptor<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token comment">// join</span> |
| <span class="token class-name">String</span> sql <span class="token operator">=</span> |
| <span class="token string">"SELECT l.Time_, l.s0,r.`root.sg.d0.s0`, r.`root.sg.d1.s0`, r.`root.sg.d1.s1`"</span> |
| <span class="token operator">+</span> <span class="token string">"FROM (select *,PROCTIME() as proc_time from leftTable) AS l "</span> |
| <span class="token operator">+</span> <span class="token string">"JOIN rightTable FOR SYSTEM_TIME AS OF l.proc_time AS r "</span> |
| <span class="token operator">+</span> <span class="token string">"ON l.Time_ = r.Time_"</span><span class="token punctuation">;</span> |
| |
| <span class="token comment">// output table</span> |
| tableEnv<span class="token punctuation">.</span><span class="token function">sqlQuery</span><span class="token punctuation">(</span>sql<span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token punctuation">}</span> |
| <span class="token punctuation">}</span> |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>执行完以上任务后，Flink 的控制台中输出的表如下：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>+----+----------------------+-------------+---------------+----------------------+--------------------------------+ |
| | op | Time_ | s0 | root.sg.d0.s0 | root.sg.d1.s0 | root.sg.d1.s1 | |
| +----+----------------------+-------------+---------------+----------------------+--------------------------------+ |
| | +I | 5 | 1 | 3.3079383 | 3.3840187 | 3.7278645 | |
| | +I | 2 | 1 | 4.929185 | 3.1885583 | 4.6980085 | |
| | +I | 1 | 1 | 1.0833644 | 2.34874 | 1.2414109 | |
| | +I | 4 | 1 | 1.3449302 | 2.8781595 | 3.3195343 | |
| | +I | 3 | 1 | 3.5206156 | 3.5600138 | 4.8080945 | |
| +----+----------------------+-------------+---------------+----------------------+--------------------------------+ |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="cdc" tabindex="-1"><a class="header-anchor" href="#cdc"><span>CDC</span></a></h3><h4 id="参数-2" tabindex="-1"><a class="header-anchor" href="#参数-2"><span>参数</span></a></h4><table><thead><tr><th>参数</th><th>必填</th><th>默认</th><th>类型</th><th>描述</th></tr></thead><tbody><tr><td>nodeUrls</td><td>否</td><td>127.0.0.1:6667</td><td>String</td><td>用来指定 IoTDB 的 datanode 地址，如果 IoTDB 是用集群模式搭建的话，可以指定多个地址，每个节点用逗号隔开。</td></tr><tr><td>user</td><td>否</td><td>root</td><td>String</td><td>IoTDB 用户名</td></tr><tr><td>password</td><td>否</td><td>root</td><td>String</td><td>IoTDB 密码</td></tr><tr><td>mode</td><td>是</td><td>BOUNDED</td><td>ENUM</td><td><strong>必须将此参数设置为 <code>CDC</code> 才能启动</strong></td></tr><tr><td>sql</td><td>是</td><td>无</td><td>String</td><td>用于在 IoTDB 端做查询。</td></tr><tr><td>cdc.port</td><td>否</td><td>8080</td><td>Integer</td><td>在 IoTDB 端提供 CDC 服务的端口号。</td></tr><tr><td><a href="http://cdc.task.name" target="_blank" rel="noopener noreferrer">cdc.task.name<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></td><td>是</td><td>无</td><td>String</td><td>当 mode 参数设置为 CDC 时是必填项。用于在 IoTDB 端创建 Pipe 任务。</td></tr><tr><td>cdc.pattern</td><td>是</td><td>无</td><td>String</td><td>当 mode 参数设置为 CDC 时是必填项。用于在 IoTDB 端作为发送数据的过滤条件。</td></tr></tbody></table><h4 id="示例-2" tabindex="-1"><a class="header-anchor" href="#示例-2"><span>示例</span></a></h4><p>该示例演示了如何通过 <code>CDC Connector</code> 去获取 IoTDB 中指定路径下的变化数据：</p><ul><li>通过 <code>CDC Connector</code> 创建一张 <code>CDC</code> 表。</li><li>将 <code>CDC</code> 表打印出来。</li></ul><div class="language-java line-numbers-mode" data-ext="java" data-title="java"><pre class="language-java"><code><span class="token keyword">import</span> <span class="token import"><span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>flink<span class="token punctuation">.</span>table<span class="token punctuation">.</span>api<span class="token punctuation">.</span></span><span class="token operator">*</span></span><span class="token punctuation">;</span> |
| |
| <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">CDCTest</span> <span class="token punctuation">{</span> |
| <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span> |
| <span class="token comment">// setup environment</span> |
| <span class="token class-name">EnvironmentSettings</span> settings <span class="token operator">=</span> <span class="token class-name">EnvironmentSettings</span> |
| <span class="token punctuation">.</span><span class="token function">newInstance</span><span class="token punctuation">(</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">inStreamingMode</span><span class="token punctuation">(</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token class-name">TableEnvironment</span> tableEnv <span class="token operator">=</span> <span class="token class-name">TableEnvironment</span><span class="token punctuation">.</span><span class="token function">create</span><span class="token punctuation">(</span>settings<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token comment">// setup schema</span> |
| <span class="token class-name">Schema</span> iotdbTableSchema <span class="token operator">=</span> <span class="token class-name">Schema</span> |
| <span class="token punctuation">.</span><span class="token function">newBuilder</span><span class="token punctuation">(</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">column</span><span class="token punctuation">(</span><span class="token string">"Time_"</span><span class="token punctuation">,</span> <span class="token class-name">DataTypes</span><span class="token punctuation">.</span><span class="token function">BIGINT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">column</span><span class="token punctuation">(</span><span class="token string">"root.sg.d0.s0"</span><span class="token punctuation">,</span> <span class="token class-name">DataTypes</span><span class="token punctuation">.</span><span class="token function">FLOAT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">column</span><span class="token punctuation">(</span><span class="token string">"root.sg.d1.s0"</span><span class="token punctuation">,</span> <span class="token class-name">DataTypes</span><span class="token punctuation">.</span><span class="token function">FLOAT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">column</span><span class="token punctuation">(</span><span class="token string">"root.sg.d1.s1"</span><span class="token punctuation">,</span> <span class="token class-name">DataTypes</span><span class="token punctuation">.</span><span class="token function">FLOAT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token comment">// register table</span> |
| <span class="token class-name">TableDescriptor</span> iotdbDescriptor <span class="token operator">=</span> <span class="token class-name">TableDescriptor</span> |
| <span class="token punctuation">.</span><span class="token function">forConnector</span><span class="token punctuation">(</span><span class="token string">"IoTDB"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">schema</span><span class="token punctuation">(</span>iotdbTableSchema<span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">option</span><span class="token punctuation">(</span><span class="token string">"mode"</span><span class="token punctuation">,</span> <span class="token string">"CDC"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">option</span><span class="token punctuation">(</span><span class="token string">"cdc.task.name"</span><span class="token punctuation">,</span> <span class="token string">"test"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">option</span><span class="token punctuation">(</span><span class="token string">"cdc.pattern"</span><span class="token punctuation">,</span> <span class="token string">"root.sg"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| tableEnv<span class="token punctuation">.</span><span class="token function">createTemporaryTable</span><span class="token punctuation">(</span><span class="token string">"iotdbTable"</span><span class="token punctuation">,</span> iotdbDescriptor<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token comment">// output table</span> |
| tableEnv<span class="token punctuation">.</span><span class="token function">from</span><span class="token punctuation">(</span><span class="token string">"iotdbTable"</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token punctuation">}</span> |
| <span class="token punctuation">}</span> |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>运行以上的 Flink CDC 任务，然后在 IoTDB-cli 中执行以下 SQL：</p><div class="language-sql line-numbers-mode" data-ext="sql" data-title="sql"><pre class="language-sql"><code><span class="token keyword">insert</span> <span class="token keyword">into</span> root<span class="token punctuation">.</span>sg<span class="token punctuation">.</span>d1<span class="token punctuation">(</span><span class="token keyword">timestamp</span><span class="token punctuation">,</span>s0<span class="token punctuation">,</span>s1<span class="token punctuation">)</span> <span class="token keyword">values</span><span class="token punctuation">(</span><span class="token number">6</span><span class="token punctuation">,</span><span class="token number">1.0</span><span class="token punctuation">,</span><span class="token number">1.0</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token keyword">insert</span> <span class="token keyword">into</span> root<span class="token punctuation">.</span>sg<span class="token punctuation">.</span>d1<span class="token punctuation">(</span><span class="token keyword">timestamp</span><span class="token punctuation">,</span>s0<span class="token punctuation">,</span>s1<span class="token punctuation">)</span> <span class="token keyword">values</span><span class="token punctuation">(</span><span class="token number">7</span><span class="token punctuation">,</span><span class="token number">1.0</span><span class="token punctuation">,</span><span class="token number">1.0</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token keyword">insert</span> <span class="token keyword">into</span> root<span class="token punctuation">.</span>sg<span class="token punctuation">.</span>d1<span class="token punctuation">(</span><span class="token keyword">timestamp</span><span class="token punctuation">,</span>s0<span class="token punctuation">,</span>s1<span class="token punctuation">)</span> <span class="token keyword">values</span><span class="token punctuation">(</span><span class="token number">6</span><span class="token punctuation">,</span><span class="token number">2.0</span><span class="token punctuation">,</span><span class="token number">1.0</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token keyword">insert</span> <span class="token keyword">into</span> root<span class="token punctuation">.</span>sg<span class="token punctuation">.</span>d0<span class="token punctuation">(</span><span class="token keyword">timestamp</span><span class="token punctuation">,</span>s0<span class="token punctuation">)</span> <span class="token keyword">values</span><span class="token punctuation">(</span><span class="token number">7</span><span class="token punctuation">,</span><span class="token number">2.0</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>然后，Flink 的控制台中将打印该条数据：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>+----+----------------------+--------------------------------+--------------------------------+--------------------------------+ |
| | op | Time_ | root.sg.d0.s0 | root.sg.d1.s0 | root.sg.d1.s1 | |
| +----+----------------------+--------------------------------+--------------------------------+--------------------------------+ |
| | +I | 7 | <NULL> | 1.0 | 1.0 | |
| | +I | 6 | <NULL> | 1.0 | 1.0 | |
| | +I | 6 | <NULL> | 2.0 | 1.0 | |
| | +I | 7 | 2.0 | <NULL> | <NULL> | |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="写模式-sink-1" tabindex="-1"><a class="header-anchor" href="#写模式-sink-1"><span>写模式（Sink）</span></a></h2><h3 id="streaming-sink" tabindex="-1"><a class="header-anchor" href="#streaming-sink"><span>Streaming Sink</span></a></h3><h4 id="参数-3" tabindex="-1"><a class="header-anchor" href="#参数-3"><span>参数</span></a></h4><table><thead><tr><th>参数</th><th>必填</th><th>默认</th><th>类型</th><th>描述</th></tr></thead><tbody><tr><td>nodeUrls</td><td>否</td><td>127.0.0.1:6667</td><td>String</td><td>用来指定 IoTDB 的 datanode 地址，如果 IoTDB 是用集群模式搭建的话，可以指定多个地址，每个节点用逗号隔开。</td></tr><tr><td>user</td><td>否</td><td>root</td><td>String</td><td>IoTDB 用户名</td></tr><tr><td>password</td><td>否</td><td>root</td><td>String</td><td>IoTDB 密码</td></tr><tr><td>aligned</td><td>否</td><td>false</td><td>Boolean</td><td>向 IoTDB 写入数据时是否调用<code>aligned</code>接口。</td></tr></tbody></table><h4 id="示例-3" tabindex="-1"><a class="header-anchor" href="#示例-3"><span>示例</span></a></h4><p>该示例演示了如何在一个 Flink Table 的 Streaming Job 中如何将数据写入到 IoTDB 中：</p><ul><li>通过 <code>datagen connector</code> 生成一张源数据表。</li><li>通过 <code>IoTDB connector</code> 注册一个输出表。</li><li>将数据源表的数据插入到输出表中。</li></ul><div class="language-java line-numbers-mode" data-ext="java" data-title="java"><pre class="language-java"><code><span class="token keyword">import</span> <span class="token import"><span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>flink<span class="token punctuation">.</span>table<span class="token punctuation">.</span>api<span class="token punctuation">.</span></span><span class="token class-name">DataTypes</span></span><span class="token punctuation">;</span> |
| <span class="token keyword">import</span> <span class="token import"><span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>flink<span class="token punctuation">.</span>table<span class="token punctuation">.</span>api<span class="token punctuation">.</span></span><span class="token class-name">EnvironmentSettings</span></span><span class="token punctuation">;</span> |
| <span class="token keyword">import</span> <span class="token import"><span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>flink<span class="token punctuation">.</span>table<span class="token punctuation">.</span>api<span class="token punctuation">.</span></span><span class="token class-name">Schema</span></span><span class="token punctuation">;</span> |
| <span class="token keyword">import</span> <span class="token import"><span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>flink<span class="token punctuation">.</span>table<span class="token punctuation">.</span>api<span class="token punctuation">.</span></span><span class="token class-name">Table</span></span><span class="token punctuation">;</span> |
| <span class="token keyword">import</span> <span class="token import"><span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>flink<span class="token punctuation">.</span>table<span class="token punctuation">.</span>api<span class="token punctuation">.</span></span><span class="token class-name">TableDescriptor</span></span><span class="token punctuation">;</span> |
| <span class="token keyword">import</span> <span class="token import"><span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>flink<span class="token punctuation">.</span>table<span class="token punctuation">.</span>api<span class="token punctuation">.</span></span><span class="token class-name">TableEnvironment</span></span><span class="token punctuation">;</span> |
| |
| <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">StreamingSinkTest</span> <span class="token punctuation">{</span> |
| <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span> |
| <span class="token comment">// setup environment</span> |
| <span class="token class-name">EnvironmentSettings</span> settings <span class="token operator">=</span> <span class="token class-name">EnvironmentSettings</span> |
| <span class="token punctuation">.</span><span class="token function">newInstance</span><span class="token punctuation">(</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">inStreamingMode</span><span class="token punctuation">(</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token class-name">TableEnvironment</span> tableEnv <span class="token operator">=</span> <span class="token class-name">TableEnvironment</span><span class="token punctuation">.</span><span class="token function">create</span><span class="token punctuation">(</span>settings<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token comment">// create data source table</span> |
| <span class="token class-name">Schema</span> dataGenTableSchema <span class="token operator">=</span> <span class="token class-name">Schema</span> |
| <span class="token punctuation">.</span><span class="token function">newBuilder</span><span class="token punctuation">(</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">column</span><span class="token punctuation">(</span><span class="token string">"Time_"</span><span class="token punctuation">,</span> <span class="token class-name">DataTypes</span><span class="token punctuation">.</span><span class="token function">BIGINT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">column</span><span class="token punctuation">(</span><span class="token string">"root.sg.d0.s0"</span><span class="token punctuation">,</span> <span class="token class-name">DataTypes</span><span class="token punctuation">.</span><span class="token function">FLOAT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">column</span><span class="token punctuation">(</span><span class="token string">"root.sg.d1.s0"</span><span class="token punctuation">,</span> <span class="token class-name">DataTypes</span><span class="token punctuation">.</span><span class="token function">FLOAT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">column</span><span class="token punctuation">(</span><span class="token string">"root.sg.d1.s1"</span><span class="token punctuation">,</span> <span class="token class-name">DataTypes</span><span class="token punctuation">.</span><span class="token function">FLOAT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token class-name">TableDescriptor</span> descriptor <span class="token operator">=</span> <span class="token class-name">TableDescriptor</span> |
| <span class="token punctuation">.</span><span class="token function">forConnector</span><span class="token punctuation">(</span><span class="token string">"datagen"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">schema</span><span class="token punctuation">(</span>dataGenTableSchema<span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">option</span><span class="token punctuation">(</span><span class="token string">"rows-per-second"</span><span class="token punctuation">,</span> <span class="token string">"1"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">option</span><span class="token punctuation">(</span><span class="token string">"fields.Time_.kind"</span><span class="token punctuation">,</span> <span class="token string">"sequence"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">option</span><span class="token punctuation">(</span><span class="token string">"fields.Time_.start"</span><span class="token punctuation">,</span> <span class="token string">"1"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">option</span><span class="token punctuation">(</span><span class="token string">"fields.Time_.end"</span><span class="token punctuation">,</span> <span class="token string">"5"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">option</span><span class="token punctuation">(</span><span class="token string">"fields.root.sg.d0.s0.min"</span><span class="token punctuation">,</span> <span class="token string">"1"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">option</span><span class="token punctuation">(</span><span class="token string">"fields.root.sg.d0.s0.max"</span><span class="token punctuation">,</span> <span class="token string">"5"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">option</span><span class="token punctuation">(</span><span class="token string">"fields.root.sg.d1.s0.min"</span><span class="token punctuation">,</span> <span class="token string">"1"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">option</span><span class="token punctuation">(</span><span class="token string">"fields.root.sg.d1.s0.max"</span><span class="token punctuation">,</span> <span class="token string">"5"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">option</span><span class="token punctuation">(</span><span class="token string">"fields.root.sg.d1.s1.min"</span><span class="token punctuation">,</span> <span class="token string">"1"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">option</span><span class="token punctuation">(</span><span class="token string">"fields.root.sg.d1.s1.max"</span><span class="token punctuation">,</span> <span class="token string">"5"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token comment">// register source table</span> |
| tableEnv<span class="token punctuation">.</span><span class="token function">createTemporaryTable</span><span class="token punctuation">(</span><span class="token string">"dataGenTable"</span><span class="token punctuation">,</span> descriptor<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token class-name">Table</span> dataGenTable <span class="token operator">=</span> tableEnv<span class="token punctuation">.</span><span class="token function">from</span><span class="token punctuation">(</span><span class="token string">"dataGenTable"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token comment">// create iotdb sink table</span> |
| <span class="token class-name">TableDescriptor</span> iotdbDescriptor <span class="token operator">=</span> <span class="token class-name">TableDescriptor</span> |
| <span class="token punctuation">.</span><span class="token function">forConnector</span><span class="token punctuation">(</span><span class="token string">"IoTDB"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">schema</span><span class="token punctuation">(</span>dataGenTableSchema<span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| tableEnv<span class="token punctuation">.</span><span class="token function">createTemporaryTable</span><span class="token punctuation">(</span><span class="token string">"iotdbSinkTable"</span><span class="token punctuation">,</span> iotdbDescriptor<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token comment">// insert data</span> |
| dataGenTable<span class="token punctuation">.</span><span class="token function">executeInsert</span><span class="token punctuation">(</span><span class="token string">"iotdbSinkTable"</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token punctuation">}</span> |
| <span class="token punctuation">}</span> |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>上述任务执行完成后，在 IoTDB 的 cli 中查询结果如下：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB> select ** from root; |
| +-----------------------------+-------------+-------------+-------------+ |
| | Time|root.sg.d0.s0|root.sg.d1.s0|root.sg.d1.s1| |
| +-----------------------------+-------------+-------------+-------------+ |
| |1970-01-01T08:00:00.001+08:00| 1.0833644| 2.34874| 1.2414109| |
| |1970-01-01T08:00:00.002+08:00| 4.929185| 3.1885583| 4.6980085| |
| |1970-01-01T08:00:00.003+08:00| 3.5206156| 3.5600138| 4.8080945| |
| |1970-01-01T08:00:00.004+08:00| 1.3449302| 2.8781595| 3.3195343| |
| |1970-01-01T08:00:00.005+08:00| 3.3079383| 3.3840187| 3.7278645| |
| +-----------------------------+-------------+-------------+-------------+ |
| Total line number = 5 |
| It costs 0.054s |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="batch-sink" tabindex="-1"><a class="header-anchor" href="#batch-sink"><span>Batch Sink</span></a></h3><h4 id="参数-4" tabindex="-1"><a class="header-anchor" href="#参数-4"><span>参数</span></a></h4><table><thead><tr><th>参数</th><th>必填</th><th>默认</th><th>类型</th><th>描述</th></tr></thead><tbody><tr><td>nodeUrls</td><td>否</td><td>127.0.0.1:6667</td><td>String</td><td>用来指定 IoTDB 的 datanode 地址，如果 IoTDB 是用集群模式搭建的话，可以指定多个地址，每个节点用逗号隔开。</td></tr><tr><td>user</td><td>否</td><td>root</td><td>String</td><td>IoTDB 用户名</td></tr><tr><td>password</td><td>否</td><td>root</td><td>String</td><td>IoTDB 密码</td></tr><tr><td>aligned</td><td>否</td><td>false</td><td>Boolean</td><td>向 IoTDB 写入数据时是否调用<code>aligned</code>接口。</td></tr></tbody></table><h4 id="示例-4" tabindex="-1"><a class="header-anchor" href="#示例-4"><span>示例</span></a></h4><p>该示例演示了如何在一个 Flink Table 的 Batch Job 中如何将数据写入到 IoTDB 中：</p><ul><li>通过 <code>IoTDB connector</code> 生成一张源数据表。</li><li>通过 <code>IoTDB connector</code> 注册一个输出表。</li><li>将原数据表中的列重命名后写入写回 IoTDB。</li></ul><div class="language-java line-numbers-mode" data-ext="java" data-title="java"><pre class="language-java"><code><span class="token keyword">import</span> <span class="token import"><span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>flink<span class="token punctuation">.</span>table<span class="token punctuation">.</span>api<span class="token punctuation">.</span></span><span class="token class-name">DataTypes</span></span><span class="token punctuation">;</span> |
| <span class="token keyword">import</span> <span class="token import"><span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>flink<span class="token punctuation">.</span>table<span class="token punctuation">.</span>api<span class="token punctuation">.</span></span><span class="token class-name">EnvironmentSettings</span></span><span class="token punctuation">;</span> |
| <span class="token keyword">import</span> <span class="token import"><span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>flink<span class="token punctuation">.</span>table<span class="token punctuation">.</span>api<span class="token punctuation">.</span></span><span class="token class-name">Schema</span></span><span class="token punctuation">;</span> |
| <span class="token keyword">import</span> <span class="token import"><span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>flink<span class="token punctuation">.</span>table<span class="token punctuation">.</span>api<span class="token punctuation">.</span></span><span class="token class-name">Table</span></span><span class="token punctuation">;</span> |
| <span class="token keyword">import</span> <span class="token import"><span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>flink<span class="token punctuation">.</span>table<span class="token punctuation">.</span>api<span class="token punctuation">.</span></span><span class="token class-name">TableDescriptor</span></span><span class="token punctuation">;</span> |
| <span class="token keyword">import</span> <span class="token import"><span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>flink<span class="token punctuation">.</span>table<span class="token punctuation">.</span>api<span class="token punctuation">.</span></span><span class="token class-name">TableEnvironment</span></span><span class="token punctuation">;</span> |
| |
| <span class="token keyword">import</span> <span class="token keyword">static</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>flink<span class="token punctuation">.</span>table<span class="token punctuation">.</span>api<span class="token punctuation">.</span></span><span class="token class-name">Expressions</span><span class="token punctuation">.</span>$<span class="token punctuation">;</span> |
| |
| <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">BatchSinkTest</span> <span class="token punctuation">{</span> |
| <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span> |
| <span class="token comment">// setup environment</span> |
| <span class="token class-name">EnvironmentSettings</span> settings <span class="token operator">=</span> <span class="token class-name">EnvironmentSettings</span> |
| <span class="token punctuation">.</span><span class="token function">newInstance</span><span class="token punctuation">(</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">inBatchMode</span><span class="token punctuation">(</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token class-name">TableEnvironment</span> tableEnv <span class="token operator">=</span> <span class="token class-name">TableEnvironment</span><span class="token punctuation">.</span><span class="token function">create</span><span class="token punctuation">(</span>settings<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token comment">// create source table</span> |
| <span class="token class-name">Schema</span> sourceTableSchema <span class="token operator">=</span> <span class="token class-name">Schema</span> |
| <span class="token punctuation">.</span><span class="token function">newBuilder</span><span class="token punctuation">(</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">column</span><span class="token punctuation">(</span><span class="token string">"Time_"</span><span class="token punctuation">,</span> <span class="token class-name">DataTypes</span><span class="token punctuation">.</span><span class="token function">BIGINT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">column</span><span class="token punctuation">(</span><span class="token string">"root.sg.d0.s0"</span><span class="token punctuation">,</span> <span class="token class-name">DataTypes</span><span class="token punctuation">.</span><span class="token function">FLOAT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">column</span><span class="token punctuation">(</span><span class="token string">"root.sg.d1.s0"</span><span class="token punctuation">,</span> <span class="token class-name">DataTypes</span><span class="token punctuation">.</span><span class="token function">FLOAT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">column</span><span class="token punctuation">(</span><span class="token string">"root.sg.d1.s1"</span><span class="token punctuation">,</span> <span class="token class-name">DataTypes</span><span class="token punctuation">.</span><span class="token function">FLOAT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token class-name">TableDescriptor</span> sourceTableDescriptor <span class="token operator">=</span> <span class="token class-name">TableDescriptor</span> |
| <span class="token punctuation">.</span><span class="token function">forConnector</span><span class="token punctuation">(</span><span class="token string">"IoTDB"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">schema</span><span class="token punctuation">(</span>sourceTableSchema<span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">option</span><span class="token punctuation">(</span><span class="token string">"sql"</span><span class="token punctuation">,</span> <span class="token string">"select ** from root.sg.d0,root.sg.d1"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| tableEnv<span class="token punctuation">.</span><span class="token function">createTemporaryTable</span><span class="token punctuation">(</span><span class="token string">"sourceTable"</span><span class="token punctuation">,</span> sourceTableDescriptor<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token class-name">Table</span> sourceTable <span class="token operator">=</span> tableEnv<span class="token punctuation">.</span><span class="token function">from</span><span class="token punctuation">(</span><span class="token string">"sourceTable"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token comment">// register sink table</span> |
| <span class="token class-name">Schema</span> sinkTableSchema <span class="token operator">=</span> <span class="token class-name">Schema</span> |
| <span class="token punctuation">.</span><span class="token function">newBuilder</span><span class="token punctuation">(</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">column</span><span class="token punctuation">(</span><span class="token string">"Time_"</span><span class="token punctuation">,</span> <span class="token class-name">DataTypes</span><span class="token punctuation">.</span><span class="token function">BIGINT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">column</span><span class="token punctuation">(</span><span class="token string">"root.sg.d2.s0"</span><span class="token punctuation">,</span> <span class="token class-name">DataTypes</span><span class="token punctuation">.</span><span class="token function">FLOAT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">column</span><span class="token punctuation">(</span><span class="token string">"root.sg.d3.s0"</span><span class="token punctuation">,</span> <span class="token class-name">DataTypes</span><span class="token punctuation">.</span><span class="token function">FLOAT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">column</span><span class="token punctuation">(</span><span class="token string">"root.sg.d3.s1"</span><span class="token punctuation">,</span> <span class="token class-name">DataTypes</span><span class="token punctuation">.</span><span class="token function">FLOAT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token class-name">TableDescriptor</span> sinkTableDescriptor <span class="token operator">=</span> <span class="token class-name">TableDescriptor</span> |
| <span class="token punctuation">.</span><span class="token function">forConnector</span><span class="token punctuation">(</span><span class="token string">"IoTDB"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">schema</span><span class="token punctuation">(</span>sinkTableSchema<span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">build</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| tableEnv<span class="token punctuation">.</span><span class="token function">createTemporaryTable</span><span class="token punctuation">(</span><span class="token string">"sinkTable"</span><span class="token punctuation">,</span> sinkTableDescriptor<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token comment">// insert data</span> |
| sourceTable<span class="token punctuation">.</span><span class="token function">renameColumns</span><span class="token punctuation">(</span> |
| $<span class="token punctuation">(</span><span class="token string">"root.sg.d0.s0"</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">as</span><span class="token punctuation">(</span><span class="token string">"root.sg.d2.s0"</span><span class="token punctuation">)</span><span class="token punctuation">,</span> |
| $<span class="token punctuation">(</span><span class="token string">"root.sg.d1.s0"</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">as</span><span class="token punctuation">(</span><span class="token string">"root.sg.d3.s0"</span><span class="token punctuation">)</span><span class="token punctuation">,</span> |
| $<span class="token punctuation">(</span><span class="token string">"root.sg.d1.s1"</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">as</span><span class="token punctuation">(</span><span class="token string">"root.sg.d3.s1"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">insertInto</span><span class="token punctuation">(</span><span class="token string">"sinkTable"</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">execute</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token punctuation">}</span> |
| <span class="token punctuation">}</span> |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>上述任务执行完成后，在 IoTDB 的 cli 中查询结果如下：</p><div class="language-text line-numbers-mode" data-ext="text" data-title="text"><pre class="language-text"><code>IoTDB> select ** from root; |
| +-----------------------------+-------------+-------------+-------------+-------------+-------------+-------------+ |
| | Time|root.sg.d0.s0|root.sg.d1.s0|root.sg.d1.s1|root.sg.d2.s0|root.sg.d3.s0|root.sg.d3.s1| |
| +-----------------------------+-------------+-------------+-------------+-------------+-------------+-------------+ |
| |1970-01-01T08:00:00.001+08:00| 1.0833644| 2.34874| 1.2414109| 1.0833644| 2.34874| 1.2414109| |
| |1970-01-01T08:00:00.002+08:00| 4.929185| 3.1885583| 4.6980085| 4.929185| 3.1885583| 4.6980085| |
| |1970-01-01T08:00:00.003+08:00| 3.5206156| 3.5600138| 4.8080945| 3.5206156| 3.5600138| 4.8080945| |
| |1970-01-01T08:00:00.004+08:00| 1.3449302| 2.8781595| 3.3195343| 1.3449302| 2.8781595| 3.3195343| |
| |1970-01-01T08:00:00.005+08:00| 3.3079383| 3.3840187| 3.7278645| 3.3079383| 3.3840187| 3.7278645| |
| +-----------------------------+-------------+-------------+-------------+-------------+-------------+-------------+ |
| Total line number = 5 |
| It costs 0.015s |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></div><!--[--><!----><!--]--><footer class="vp-page-meta"><div class="vp-meta-item edit-link"><a href="https://github.com/apache/iotdb-docs/edit/main/src/zh/UserGuide/V1.2.x/Ecosystem-Integration/Flink-SQL-IoTDB.md" rel="noopener noreferrer" target="_blank" aria-label="发现错误？在 GitHub 上编辑此页" class="nav-link vp-meta-label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->发现错误？在 GitHub 上编辑此页<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="vp-meta-item git-info"><div class="update-time"><span class="vp-meta-label">上次编辑于: </span><!----></div><!----></div></footer><nav class="vp-page-nav"><a class="route-link nav-link prev" href="/zh/UserGuide/V1.2.x/Ecosystem-Integration/Flink-IoTDB.html" aria-label="Flink-IoTDB-Connector"><div class="hint"><span class="arrow start"></span>上一页</div><div class="link"><!---->Flink-IoTDB-Connector</div></a><a class="route-link nav-link next" href="/zh/UserGuide/V1.2.x/Ecosystem-Integration/Flink-TsFile.html" aria-label="Flink-TsFile-Connector"><div class="hint">下一页<span class="arrow end"></span></div><div class="link">Flink-TsFile-Connector<!----></div></a></nav><!----><!--[--><!----><!--]--><!--]--></main><!--]--><footer style="padding-bottom:2rem;"><span id="doc-version" style="display:none;">rel/1.2</span><p style="text-align:center;color:#909399;font-size:12px;margin:0 30px;">Copyright © 2024 The Apache Software Foundation.<br> Apache and the Apache feather logo are trademarks of The Apache Software Foundation</p><p style="text-align:center;margin-top:10px;color:#909399;font-size:12px;margin:0 30px;"><strong>Have a question?</strong> Connect with us on QQ, WeChat, or Slack. <a href="https://github.com/apache/iotdb/issues/1995">Join the community</a> now.</p></footer></div><!--]--><!--]--><!--[--><!----><!--]--><!--]--></div> |
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