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markdown"><header><h1>Kafka</h1></header><h2 class="anchor anchorWithStickyNavbar_LWe7" id="概述">概述<a href="#概述" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading">​</a></h2><p><code>Kafka Extract</code> 节点 支持从 Kafka topics 中读取数据。它支持以普通的方式读取数据和 Upsert 的方式读取数据。<code>upsert-kafka</code> 连接器生产 <code>changelog</code> 流,
其中每条数据记录代表一个更新或删除事件。<code>kafka-inlong</code> 连接器可以以普通方式读取数据和元数据信息。</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="支持的版本">支持的版本<a href="#支持的版本" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading">​</a></h2><table><thead><tr><th>Extract 节点</th><th>Kafka 版本</th></tr></thead><tbody><tr><td><a href="/zh-CN/docs/data_node/extract_node/kafka">Kafka</a></td><td>0.10+</td></tr></tbody></table><h2 class="anchor anchorWithStickyNavbar_LWe7" id="依赖">依赖<a href="#依赖" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading">​</a></h2><p>为了设置 Kafka Extract 节点, 下面提供了使用构建自动化工具（例如 Maven 或 SBT）和带有 Sort Connector JAR 包的 SQL 客户端的两个项目的依赖关系信息。</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="maven-依赖">Maven 依赖<a href="#maven-依赖" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading">​</a></h3><div class="codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#F8F8F2;--prism-background-color:#282A36"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-text codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#F8F8F2"><span class="token plain">&lt;dependency&gt;</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> &lt;groupId&gt;org.apache.inlong&lt;/groupId&gt;</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> &lt;artifactId&gt;sort-connector-kafka&lt;/artifactId&gt;</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> &lt;version&gt;1.11.0-SNAPSHOT&lt;/version&gt;</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain">&lt;/dependency&gt;</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg class="copyButtonIcon_y97N" viewBox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg class="copyButtonSuccessIcon_LjdS" viewBox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h2 class="anchor anchorWithStickyNavbar_LWe7" id="如何创建-kafka-extract-节点">如何创建 Kafka Extract 节点<a href="#如何创建-kafka-extract-节点" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading">​</a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="sql-api-用法">SQL API 用法<a href="#sql-api-用法" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading">​</a></h3><p>下面这个例子展示了如何用 <code>Flink SQL</code> 创建一个 Kafka Extract 节点:</p><ul><li>连接器是 <code>kafka-inlong</code></li></ul><div class="language-sql codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#F8F8F2;--prism-background-color:#282A36"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-sql codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#F8F8F2"><span class="token comment" style="color:rgb(98, 114, 164)">-- 设置 Checkpoint 为 3000 毫秒 </span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain">Flink </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">SQL</span><span class="token operator">&gt;</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">SET</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;execution.checkpointing.interval&#x27;</span><span class="token plain"> </span><span class="token operator">=</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;3s&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">;</span><span class="token plain"> </span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"></span><span class="token comment" style="color:rgb(98, 114, 164)">-- 使用 Flink SQL 创建 Kafka 表 &#x27;kafka_extract_node&#x27;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain">Flink </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">SQL</span><span class="token operator">&gt;</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">CREATE</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">TABLE</span><span class="token plain"> kafka_extract_node </span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token identifier">id</span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">INT</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token identifier">name</span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token plain"> STRINTG</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">WITH</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;connector&#x27;</span><span class="token plain"> </span><span class="token operator">=</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;kafka-inlong&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;topic&#x27;</span><span class="token plain"> </span><span class="token operator">=</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;user&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;properties.bootstrap.servers&#x27;</span><span class="token plain"> </span><span class="token operator">=</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;localhost:9092&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;properties.group.id&#x27;</span><span class="token plain"> </span><span class="token operator">=</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;testGroup&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;scan.startup.mode&#x27;</span><span class="token plain"> </span><span class="token operator">=</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;earliest-offset&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;format&#x27;</span><span class="token plain"> </span><span class="token operator">=</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;csv&#x27;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"></span><span class="token comment" style="color:rgb(98, 114, 164)">-- 读取数据</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain">Flink </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">SQL</span><span class="token operator">&gt;</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">SELECT</span><span class="token plain"> </span><span class="token operator">*</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">FROM</span><span class="token plain"> kafka_extract_node</span><span class="token punctuation" style="color:rgb(248, 248, 242)">;</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg class="copyButtonIcon_y97N" viewBox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg class="copyButtonSuccessIcon_LjdS" viewBox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><ul><li>连接器是 <code>upsert-kafka</code></li></ul><div class="language-sql codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#F8F8F2;--prism-background-color:#282A36"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-sql codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#F8F8F2"><span class="token comment" style="color:rgb(98, 114, 164)">-- 设置 Checkpoint 为 3000 毫秒 </span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain">Flink </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">SQL</span><span class="token operator">&gt;</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">SET</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;execution.checkpointing.interval&#x27;</span><span class="token plain"> </span><span class="token operator">=</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;3s&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"></span><span class="token comment" style="color:rgb(98, 114, 164)">-- 使用 Flink SQL 创建 Kafka 表 &#x27;kafka_extract_node&#x27;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain">Flink </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">SQL</span><span class="token operator">&gt;</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">CREATE</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">TABLE</span><span class="token plain"> kafka_extract_node </span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token identifier">id</span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">INT</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token identifier">name</span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token plain"> STRINTG</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">PRIMARY</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">KEY</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token identifier">id</span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token plain"> </span><span class="token operator">NOT</span><span class="token plain"> ENFORCED</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">WITH</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;connector&#x27;</span><span class="token plain"> </span><span class="token operator">=</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;upsert-kafka-inlong&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;topic&#x27;</span><span class="token plain"> </span><span class="token operator">=</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;user&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;properties.bootstrap.servers&#x27;</span><span class="token plain"> </span><span class="token operator">=</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;localhost:9092&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;properties.group.id&#x27;</span><span class="token plain"> </span><span class="token operator">=</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;testGroup&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;scan.startup.mode&#x27;</span><span class="token plain"> </span><span class="token operator">=</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;earliest-offset&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;key.format&#x27;</span><span class="token plain"> </span><span class="token operator">=</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;csv&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;value.format&#x27;</span><span class="token plain"> </span><span class="token operator">=</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;csv&#x27;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"></span><span class="token comment" style="color:rgb(98, 114, 164)">-- 读取数据</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain">Flink </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">SQL</span><span class="token operator">&gt;</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">SELECT</span><span class="token plain"> </span><span class="token operator">*</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">FROM</span><span class="token plain"> kafka_extract_node</span><span class="token punctuation" style="color:rgb(248, 248, 242)">;</span><span class="token plain"> </span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg class="copyButtonIcon_y97N" viewBox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg class="copyButtonSuccessIcon_LjdS" viewBox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="inlong-dashboard-用法">InLong Dashboard 用法<a href="#inlong-dashboard-用法" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading">​</a></h3><p>TODO: 将在未来支持此功能。</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="inlong-manager-client-用法">InLong Manager Client 用法<a href="#inlong-manager-client-用法" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading">​</a></h3><p>TODO: 将在未来支持此功能。</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="kafka-extract-节点参数">Kafka Extract 节点参数<a href="#kafka-extract-节点参数" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading">​</a></h2><table><thead><tr><th>参数</th><th>是否必选</th><th>默认值</th><th>数据类型</th><th>描述</th></tr></thead><tbody><tr><td>connector</td><td>必选</td><td>(none)</td><td>String</td><td>指定要使用的连接器 1. Upsert Kafka 连接器使用： <code>upsert-kafka-inlong</code> 2. Kafka连接器使用： <code>kafka-inlong</code></td></tr><tr><td>topic</td><td>可选</td><td>(none)</td><td>String</td><td>当表用作 source 时读取数据的 topic 名。亦支持用分号间隔的 topic 列表，如 <code>topic-1;topic-2</code>。注意，对 source 表而言，<code>topic</code> 和 <code>topic-pattern</code> 两个选项只能使用其中一个。</td></tr><tr><td>topic-pattern</td><td>可选</td><td>(none)</td><td>String</td><td>匹配读取 topic 名称的正则表达式。在作业开始运行时，所有匹配该正则表达式的 topic 都将被 Kafka consumer 订阅。注意，对 source 表而言，<code>topic</code> 和 <code>topic-pattern</code> 两个选项只能使用其中一个。</td></tr><tr><td>properties.bootstrap.servers</td><td>必选</td><td>(none)</td><td>String</td><td>逗号分隔的 Kafka broker 列表。</td></tr><tr><td>properties.group.id</td><td>必选</td><td>(none)</td><td>String</td><td>Kafka source 的消费组 id。</td></tr><tr><td>properties.*</td><td>可选</td><td>(none)</td><td>String</td><td>可以设置和传递任意 Kafka 的配置项。后缀名必须匹配在 <a href="https://kafka.apache.org/documentation/#configuration" target="_blank" rel="noopener noreferrer">Kafka 配置文档</a> 中定义的配置键。Flink 将移除 &quot;properties.&quot; 配置键前缀并将变换后的配置键和值传入底层的 Kafka 客户端。例如，你可以通过 &#x27;properties.allow.auto.create.topics&#x27; = &#x27;false&#x27; 来禁用 topic 的自动创建。但是某些配置项不支持进行配置，因为 Flink 会覆盖这些配置，例如 &#x27;key.deserializer&#x27; 和 &#x27;value.deserializer&#x27;。</td></tr><tr><td>format</td><td>对于 Kafka 必选</td><td>(none)</td><td>String</td><td>用来序列化或反序列化 Kafka 消息的格式。 请参阅 <a href="https://nightlies.apache.org/flink/flink-docs-release-1.13/docs/connectors/table/formats/overview/" target="_blank" rel="noopener noreferrer">格式</a> 页面以获取更多关于格式的细节和相关配置项。 注意：该配置项和 &#x27;value.format&#x27; 二者必需其一。</td></tr><tr><td>key.format</td><td>可选</td><td>(none)</td><td>String</td><td>用来序列化和反序列化 Kafka 消息键（Key）的格式。 请参阅 格式 页面以获取更多关于格式的细节和相关配置项。 注意：如果定义了键格式，则配置项 &#x27;key.fields&#x27; 也是必需的。 否则 Kafka 记录将使用空值作为键。</td></tr><tr><td>key.fields</td><td>可选</td><td>[]</td><td><code>List&lt;String&gt;</code></td><td>表结构中用来配置消息键（Key）格式数据类型的字段列表。默认情况下该列表为空，因此消息键没有定义。 列表格式为 &#x27;field1;field2&#x27;。</td></tr><tr><td>key.fields-prefix</td><td>可选</td><td>(none)</td><td>String</td><td>为所有消息键（Key）格式字段指定自定义前缀，以避免与消息体（Value）格式字段重名。默认情况下前缀为空。 如果定义了前缀，表结构和配置项 &#x27;key.fields&#x27; 都需要使用带前缀的名称。 当构建消息键格式字段时，前缀会被移除，消息键格式将会使用无前缀的名称。 请注意该配置项要求必须将 &#x27;value.fields-include&#x27; 配置为 &#x27;EXCEPT_KEY&#x27;。</td></tr><tr><td>value.format</td><td>对于 Upsert Kafka 必选</td><td>(none)</td><td>String</td><td>用于对 Kafka 消息中 value 部分序列化和反序列化的格式。支持的格式包括 &#x27;csv&#x27;、&#x27;json&#x27;、&#x27;avro&#x27;。请参考<a href="https://nightlies.apache.org/flink/flink-docs-release-1.13/zh/docs/connectors/table/formats/overview/" target="_blank" rel="noopener noreferrer">格式</a>页面以获取更多详细信息和格式参数。</td></tr><tr><td>value.fields-include</td><td>可选</td><td>ALL</td><td>String</td><td>控制哪些字段应该出现在 value 中。可取值：<br> ALL：消息的 value 部分将包含 schema 中所有的字段，包括定义为主键的字段。<br> EXCEPT_KEY：记录的 value 部分包含 schema 的所有字段，定义为主键的字段除外。</td></tr><tr><td>scan.startup.mode</td><td>可选</td><td>group-offsets</td><td>String</td><td>Kafka consumer 的启动模式。有效值为：&#x27;earliest-offset&#x27;，&#x27;latest-offset&#x27;，&#x27;group-offsets&#x27;，&#x27;timestamp&#x27; 和 &#x27;specific-offsets&#x27;。 请参阅下方 起始消费位点 以获取更多细节。</td></tr><tr><td>scan.startup.specific-offsets</td><td>可选</td><td>(none)</td><td>String</td><td>在使用 &#x27;specific-offsets&#x27; 启动模式时为每个 partition 指定 offset，例如 &#x27;partition:0,offset:42;partition:1,offset:300&#x27;。</td></tr><tr><td>scan.startup.timestamp-millis</td><td>可选</td><td>(none)</td><td>Long</td><td>在使用 &#x27;timestamp&#x27; 启动模式时指定启动的时间戳（单位毫秒）。</td></tr><tr><td>scan.topic-partition-discovery.interval</td><td>可选</td><td>(none)</td><td>Duration</td><td>Consumer 定期探测动态创建的 Kafka topic 和 partition 的时间间隔。</td></tr><tr><td>inlong.metric.labels</td><td>可选</td><td>(none)</td><td>String</td><td>inlong metric 的标签值，该值的构成为groupId=<code>{groupId}</code>&amp;streamId=<code>{streamId}</code>&amp;nodeId=<code>{nodeId}</code>。</td></tr><tr><td>sink.ignore.changelog</td><td>可选</td><td>false</td><td>布尔型</td><td>支持所有类型的 changelog 流 ingest 到 Kafka。</td></tr></tbody></table><h2 class="anchor anchorWithStickyNavbar_LWe7" id="可用的元数据字段">可用的元数据字段<a href="#可用的元数据字段" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading">​</a></h2><p>以下格式元数据可以作为表定义中的只读 (VIRTUAL) 列公开。 它支持读取格式 <code>canal-json-inlong</code> 的元数据。</p><table><thead><tr><th>字段名称</th><th>数据类型</th><th>描述</th></tr></thead><tbody><tr><td>value.table_name</td><td>STRING</td><td>包含该行的表的名称</td></tr><tr><td>value.database_name</td><td>STRING</td><td>包含该行的数据库的名称</td></tr><tr><td>value.op_ts</td><td>TIMESTAMP(3)</td><td>它指示在数据库中进行更改的时间。 如果记录是从表的快照而不是binlog中读取的，则该值始终为0</td></tr><tr><td>value.op_type</td><td>STRING</td><td>操作类型, INSERT/UPDATE/DELETE</td></tr><tr><td>value.batch_id</td><td>BIGINT</td><td>不重要的, 一个简单的自增器</td></tr><tr><td>value.is_ddl</td><td>BOOLEAN</td><td>不下发 DDL, 值是 false</td></tr><tr><td>value.update_before</td><td><code>ARRAY&lt;MAP&lt;STRING, STRING&gt;&gt;</code></td><td>UPDATE 记录的 update-before 数据</td></tr><tr><td>value.mysql_type</td><td>MAP&lt;STRING, STRING&gt;</td><td>MySQL 字段类型</td></tr><tr><td>value.pk_names</td><td><code>ARRAY&lt;STRING&gt;</code></td><td>主键</td></tr><tr><td>value.sql_type</td><td>MAP&lt;STRING, INT&gt;</td><td>SQL 字段类型</td></tr><tr><td>value.ts</td><td>TIMESTAMP_LTZ(3)</td><td>ts_ms 字段用于存储有关连接器处理/生成事件的本地时间的信息</td></tr></tbody></table><p>扩展的 CREATE TABLE 示例演示了使用这些元数据字段的语法：</p><div class="language-sql codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#F8F8F2;--prism-background-color:#282A36"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-sql codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#F8F8F2"><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">CREATE</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">TABLE</span><span class="token plain"> </span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token identifier">kafka_extract_node</span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token identifier">id</span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">INT</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token identifier">name</span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token plain"> STRING</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token identifier">database_name</span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token plain"> string METADATA </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">FROM</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;value.database_name&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token identifier">table_name</span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token plain"> string METADATA </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">FROM</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;value.table_name&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token identifier">op_ts</span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">timestamp</span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token number">3</span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><span class="token plain"> METADATA </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">FROM</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;value.op_ts&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token identifier">op_type</span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token plain"> string METADATA </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">FROM</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;value.op_type&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token identifier">batch_id</span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">bigint</span><span class="token plain"> METADATA </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">FROM</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;value.batch_id&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token identifier">is_ddl</span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">boolean</span><span class="token plain"> METADATA </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">FROM</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;value.is_ddl&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token identifier">update_before</span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token plain"> ARRAY</span><span class="token operator">&lt;</span><span class="token plain">MAP</span><span class="token operator">&lt;</span><span class="token plain">STRING</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"> STRING</span><span class="token operator">&gt;&gt;</span><span class="token plain"> METADATA </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">FROM</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;value.update_before&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token identifier">mysql_type</span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token plain"> MAP</span><span class="token operator">&lt;</span><span class="token plain">STRING</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"> STRING</span><span class="token operator">&gt;</span><span class="token plain"> METADATA </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">FROM</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;value.mysql_type&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token identifier">pk_names</span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token plain"> ARRAY</span><span class="token operator">&lt;</span><span class="token plain">STRING</span><span class="token operator">&gt;</span><span class="token plain"> METADATA </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">FROM</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;value.pk_names&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token identifier">data</span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token plain"> STRING METADATA </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">FROM</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;value.data&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token identifier">sql_type</span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token plain"> MAP</span><span class="token operator">&lt;</span><span class="token plain">STRING</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">INT</span><span class="token operator">&gt;</span><span class="token plain"> METADATA </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">FROM</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;value.sql_type&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token identifier punctuation" style="color:rgb(248, 248, 242)">`</span><span class="token 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class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">WITH</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;connector&#x27;</span><span class="token plain"> </span><span class="token operator">=</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;kafka-inlong&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;topic&#x27;</span><span class="token plain"> </span><span class="token operator">=</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;user&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;properties.bootstrap.servers&#x27;</span><span class="token plain"> </span><span class="token operator">=</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;localhost:9092&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;properties.group.id&#x27;</span><span class="token plain"> </span><span class="token operator">=</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;testGroup&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;scan.startup.mode&#x27;</span><span class="token plain"> </span><span class="token operator">=</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;earliest-offset&#x27;</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;format&#x27;</span><span class="token plain"> </span><span class="token operator">=</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">&#x27;canal-json-inlong&#x27;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"></span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg class="copyButtonIcon_y97N" viewBox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg class="copyButtonSuccessIcon_LjdS" viewBox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h2 class="anchor anchorWithStickyNavbar_LWe7" id="数据类型映射">数据类型映射<a href="#数据类型映射" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading">​</a></h2><p>Kafka 将消息键值以二进制进行存储，因此 Kafka 并不存在 schema 或数据类型。Kafka 消息使用格式配置进行序列化和反序列化，例如 csv，json，avro。 因此，数据类型映射取决于使用的格式。请参阅 <a href="https://nightlies.apache.org/flink/flink-docs-release-1.13/zh/docs/connectors/table/formats/overview/" target="_blank" rel="noopener noreferrer">格式</a> 页面以获取更多细节。</p></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="theme-doc-footer-edit-meta-row row"><div class="col"><a href="https://github.com/apache/inlong-website/edit/master/versioned_docs/version-1.11.0/data_node/extract_node/kafka.md" target="_blank" rel="noreferrer noopener" class="theme-edit-this-page"><svg fill="currentColor" height="20" width="20" viewBox="0 0 40 40" class="iconEdit_Z9Sw" aria-hidden="true"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div><div class="col lastUpdated_vwxv"></div></div></footer></article><nav class="pagination-nav 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