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actively maintained.</div><div class="margin-top--md">For up-to-date documentation, see the <b><a href="/zh-CN/docs/data_node/extract_node/mysql-cdc">latest version</a></b> (<!-- -->1.11.0<!-- -->).</div></div><div class="docItemContainer_Djhp"><article><nav class="theme-doc-breadcrumbs breadcrumbsContainer_Z_bl" aria-label="页面路径"><ul class="breadcrumbs" itemscope="" itemtype="https://schema.org/BreadcrumbList"><li class="breadcrumbs__item"><a aria-label="主页面" class="breadcrumbs__link" href="/zh-CN/"><svg viewBox="0 0 24 24" class="breadcrumbHomeIcon_YNFT"><path d="M10 19v-5h4v5c0 .55.45 1 1 1h3c.55 0 1-.45 1-1v-7h1.7c.46 0 .68-.57.33-.87L12.67 3.6c-.38-.34-.96-.34-1.34 0l-8.36 7.53c-.34.3-.13.87.33.87H5v7c0 .55.45 1 1 1h3c.55 0 1-.45 1-1z" fill="currentColor"></path></svg></a></li><li class="breadcrumbs__item"><span class="breadcrumbs__link">数据节点</span><meta itemprop="position" content="1"></li><li class="breadcrumbs__item"><span class="breadcrumbs__link">Extract Nodes</span><meta itemprop="position" content="2"></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">MySQL-CDC</span><meta itemprop="position" content="3"></li></ul></nav><span class="theme-doc-version-badge badge badge--secondary">版本：1.9.0</span><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><header><h1>MySQL-CDC</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>MySQL Extract 节点允许从 MySQL 数据库中读取快照数据和增量数据。本文档介绍如何设置 MySQL Extract 节点以对 MySQL 数据库运行 SQL 查询。</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>版本</th><th>Driver</th></tr></thead><tbody><tr><td><a href="/zh-CN/docs/1.9.0/data_node/extract_node/mysql-cdc">MySQL-CDC</a></td><td><a href="https://dev.mysql.com/doc" target="_blank" rel="noopener noreferrer">MySQL</a>: 5.6, 5.7, 8.0.x <br> <a href="https://www.aliyun.com/product/rds/mysql" target="_blank" rel="noopener noreferrer">RDS MySQL</a>: 5.6, 5.7, 8.0.x <br> <a href="https://www.aliyun.com/product/polardb" target="_blank" rel="noopener noreferrer">PolarDB MySQL</a>: 5.6, 5.7, 8.0.x <br> <a href="https://aws.amazon.com/cn/rds/aurora" target="_blank" rel="noopener noreferrer">Aurora MySQL</a>: 5.6, 5.7, 8.0.x <br> <a href="https://mariadb.org" target="_blank" rel="noopener noreferrer">MariaDB</a>: 10.x <br> <a href="https://github.com/polardb/polardbx-sql" target="_blank" rel="noopener noreferrer">PolarDB X</a>: 2.0.1</td><td>JDBC Driver: 8.0.21</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 MySQL Extract 节点，下表提供了使用构建自动化工具（例如 Maven 或 SBT）和带有 Sort Connectors 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"><dependency></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> <groupId>org.apache.inlong</groupId></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> <artifactId>sort-connector-mysql-cdc</artifactId></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> <version>1.9.0</version></span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"></dependency></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><p>连接 MySQL 数据库还需要 MySQL 驱动程序依赖项。请下载<a href="https://repo1.maven.org/maven2/mysql/mysql-connector-java/8.0.21/mysql-connector-java-8.0.21.jar" target="_blank" rel="noopener noreferrer">mysql-connector-java-8.0.21.jar</a> 并将其放入 <code>FLINK_HOME/lib/</code>。</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="设置-mysql-服务器">设置 MySQL 服务器<a href="#设置-mysql-服务器" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h2><p>你必须定义一个对 Debezium MySQL 连接器监控的所有数据库具有适当权限的 MySQL 用户。</p><ul><li>创建 MySQL 用户:</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 plain">mysql</span><span class="token operator">></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">USER</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'user'</span><span class="token variable" style="color:rgb(189, 147, 249);font-style:italic">@'localhost'</span><span class="token plain"> IDENTIFIED </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">BY</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'password'</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>向用户授予所需的权限:</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 plain">mysql</span><span class="token operator">></span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">GRANT</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">SELECT</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">SHOW</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">DATABASES</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">REPLICATION</span><span class="token plain"> SLAVE</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">REPLICATION</span><span class="token plain"> CLIENT </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">ON</span><span class="token plain"> </span><span class="token operator">*</span><span class="token punctuation" style="color:rgb(248, 248, 242)">.</span><span class="token operator">*</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">TO</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'user'</span><span class="token plain"> IDENTIFIED </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">BY</span><span class="token plain"> </span><span class="token string" style="color:rgb(255, 121, 198)">'password'</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><p><strong>注意：</strong> 启用 <code>scan.incremental.snapshot.enabled</code> 时不再需要 RELOAD 权限（默认启用）。</p><ul><li>刷新用户的权限：</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 plain">mysql</span><span class="token operator">></span><span class="token plain"> FLUSH </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">PRIVILEGES</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><p>查看更多关于<a href="https://debezium.io/documentation/reference/1.5/connectors/mysql.html#mysql-creating-user" target="_blank" rel="noopener noreferrer">权限说明</a>。</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="注意事项">注意事项<a href="#注意事项" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="为每个-reader-设置一个不同的-server-id">为每个 Reader 设置一个不同的 SERVER ID<a href="#为每个-reader-设置一个不同的-server-id" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h3><p>每一个读取 Binlog 的 MySQL 数据库客户端都应该有一个唯一的 Id，称为 Server Id。 MySQL 服务器将使用此 Id 来维护网络连接和 Binlog 位置。因此，如果不同的作业共享相同的服务器 Id，可能会导致从错误的 Binlog 位置读取。 |
| 因此，建议通过 <!-- -->[SQL Hints]<!-- -->(<a href="https://ci.apache.org/projects/flink/flink-docs-release-1.11/dev/table/sql/hints" target="_blank" rel="noopener noreferrer">https://ci.apache.org/projects/flink/flink-docs-release-1.11/dev/table/sql/hints</a>. html), |
| 例如假设源并行度为 4，那么我们可以使用 <code>SELECT * FROM source_table /*+ OPTIONS('server-id'='5401-5404') */ ;</code> 为 4 个 Source Reader 中的每一个分配唯一的服务器 Id。</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="设置-mysql-会话超时">设置 MySQL 会话超时<a href="#设置-mysql-会话超时" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h3><p>当为大型数据库制作初始一致快照时，您建立的连接可能会在读取表时超时。您可以通过在 MySQL 配置文件中配置 <code>interactive_timeout</code> 和 <code>wait_timeout</code> 来防止这种行为。</p><ul><li><code>interactive_timeout</code>：服务器在关闭交互式连接之前等待其活动的秒数。请参阅 <a href="https://dev.mysql.com/doc/refman/8.0/en/server-system-variables.html#sysvar_interactive_timeout" target="_blank" rel="noopener noreferrer">MySQL 文档</a>。</li><li><code>wait_timeout</code>：服务器在关闭非交互式连接之前等待其活动的秒数。请参阅 <a href="https://dev.mysql.com/doc/refman/8.0/en/server-system-variables.html#sysvar_wait_timeout" target="_blank" rel="noopener noreferrer">MySQL 文档</a>。</li></ul><h2 class="anchor anchorWithStickyNavbar_LWe7" id="如何创建一个-mysql-extract-节点">如何创建一个 MySQL Extract 节点<a href="#如何创建一个-mysql-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 MySQL Extract 节点: </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 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">></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)">'execution.checkpointing.interval'</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)">'3s'</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">Flink </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">SQL</span><span class="token operator">></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"> mysql_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"> order_id </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"> order_date </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">0</span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</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"> customer_name 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"> price </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">DECIMAL</span><span class="token punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token number">10</span><span class="token punctuation" style="color:rgb(248, 248, 242)">,</span><span class="token plain"> </span><span class="token number">5</span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</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"> product_id </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"> order_status </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">BOOLEAN</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 punctuation" style="color:rgb(248, 248, 242)">(</span><span class="token plain">order_id</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)">'connector'</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)">'mysql-cdc-inlong'</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)">'hostname'</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)">'YourHostname'</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)">'port'</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)">'3306'</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)">'username'</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)">'YourUsername'</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)">'password'</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)">'YourPassword'</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)">'database-name'</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)">'YourDatabaseName'</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)">'table-name'</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)">'YourTableName'</span><span class="token punctuation" style="color:rgb(248, 248, 242)">)</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">Flink </span><span class="token keyword" style="color:rgb(189, 147, 249);font-style:italic">SQL</span><span class="token operator">></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"> mysql_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><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><ul><li><p>Choose the <code>BINLOG</code> Data Source |
| <img loading="lazy" alt="MySQL BINLOG" src="/zh-CN/assets/images/mysql-binlog-21c890abab0f03d8f5b09f4e7ad2f778.png" width="1880" height="399" class="img_ev3q"></p></li><li><p>Configure the MySQL Source |
| <img loading="lazy" alt="MySQL SOURCE" src="/zh-CN/assets/images/mysql-source-d4b1f4f4bbe3db4c9dfc6083aeb49d85.png" width="826" height="898" class="img_ev3q"></p></li></ul><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="mysql-extract-节点参数">MySQL Extract 节点参数<a href="#mysql-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>是否必须</th><th>默认值</th><th>数据类型</th><th>描述</th></tr></thead><tbody><tr><td>connector</td><td>required</td><td>(none)</td><td>String</td><td>指定要使用的连接器，这里应该是 <code>'mysql-cdc-inlong'</code>。</td></tr><tr><td>hostname</td><td>required</td><td>(none)</td><td>String</td><td>MySQL 数据库服务器的 IP 地址或主机名。</td></tr><tr><td>username</td><td>required</td><td>(none)</td><td>String</td><td>连接到 MySQL 数据库服务器时要使用的 MySQL 用户名称。</td></tr><tr><td>password</td><td>required</td><td>(none)</td><td>String</td><td>连接到 MySQL 数据库服务器时使用的密码。</td></tr><tr><td>database-name</td><td>required</td><td>(none)</td><td>String</td><td>要监控的 MySQL 服务器的数据库名称。 database-name 还支持正则表达式来监控多个表是否匹配正则表达式。</td></tr><tr><td>table-name</td><td>required</td><td>(none)</td><td>String</td><td>要监控的 MySQL 数据库的表名。 table-name 还支持正则表达式来监控多个表是否匹配正则表达式。</td></tr><tr><td>port</td><td>optional</td><td>3306</td><td>Integer</td><td>MySQL 数据库服务器的整数端口号。</td></tr><tr><td>server-id</td><td>optional</td><td>(none)</td><td>Integer</td><td>此数据库客户端的数字 Id 或数字 Id 范围，数字 Id 语法类似于 '5400'， 数字 Id 范围语法类似于 '5400-5408'，启用 'scan.incremental.snapshot.enabled' 时建议使用数字 Id 范围语法。 在 MySQL 集群中所有当前运行的数据库进程中，每个 Id 都必须是唯一的。此连接器加入 MySQL 集群 作为另一台服务器（具有此唯一 Id），因此它可以读取 Binlog。默认情况下，会生成一个介于 5400 和 6400 之间的随机数， 尽管我们建议设置一个明确的值。</td></tr><tr><td>scan.incremental.snapshot.enabled</td><td>optional</td><td>true</td><td>Boolean</td><td>增量快照是一种读取表快照的新机制。与旧的快照机制相比， 增量快照有很多优点，包括： (1) 快照读取时 Source 可以并行， (2) Source 可以在快照读取时在 Chunk 粒度上进行检查点， (3) Source 在读快照前不需要获取全局读锁（FLUSH TABLES WITH READ LOCK）。 如果您希望源代码并行运行，每个并行阅读器都应该有一个唯一的服务器 ID，所以 'server-id' 必须是 '5400-6400' 这样的范围，并且范围必须大于并行度。 请参阅<a href="https://ververica.github.io/flink-cdc-connectors/release-2.2/content/connectors/mysql-cdc.html#incremental-snapshot-reading" target="_blank" rel="noopener noreferrer">增量快照阅读</a>部分了解更多详细信息。</td></tr><tr><td>scan.incremental.snapshot.chunk.size</td><td>optional</td><td>8096</td><td>Integer</td><td>表快照的块大小（行数），读取表的快照时，表的快照被分成多个块。</td></tr><tr><td>scan.snapshot.fetch.size</td><td>optional</td><td>1024</td><td>Integer</td><td>读取表快照时每次轮询的最大获取大小。</td></tr><tr><td>scan.startup.mode</td><td>optional</td><td>initial</td><td>String</td><td>MySQL CDC 消费者的可选启动模式，有效枚举为 'initial' 和 'latest-offset'。 请参阅<a href="#%E5%90%AF%E5%8A%A8%E6%A8%A1%E5%BC%8F">启动阅读位置</a>部分了解更多详细信息。</td></tr><tr><td>scan.startup.specific-offset.file</td><td>optional</td><td>(none)</td><td>String</td><td>在 'specific-offset' 启动模式下，启动位点的 binlog 文件名。</td></tr><tr><td>scan.startup.specific-offset.pos</td><td>optional</td><td>(none)</td><td>Long</td><td>在 'specific-offset' 启动模式下，启动位点的 binlog 文件位置。</td></tr><tr><td>scan.startup.specific-offset.gtid-set</td><td>optional</td><td>(none)</td><td>String</td><td>在 'specific-offset' 启动模式下，启动位点的 GTID 集合。</td></tr><tr><td>scan.startup.specific-offset.skip-events</td><td>optional</td><td>(none)</td><td>Long</td><td>在指定的启动位点后需要跳过的事件数量。</td></tr><tr><td>scan.startup.specific-offset.skip-rows</td><td>optional</td><td>(none)</td><td>Long</td><td>在指定的启动位点后需要跳过的数据行数量。</td></tr><tr><td>server-time-zone</td><td>optional</td><td>UTC</td><td>String</td><td>数据库服务器中的会话时区，例如 'Asia/Shanghai'。 它控制 MYSQL 中的 TIMESTAMP 类型如何转换为 STRING。 查看更多<a href="https://debezium.io/documentation/reference/1.5/connectors/mysql.html#mysql-temporal-types" target="_blank" rel="noopener noreferrer">这里</a>。</td></tr><tr><td>debezium.min.row. count.to.stream.result</td><td>optional</td><td>1000</td><td>Integer</td><td>在快照操作期间，连接器将查询每个包含的表，以便为该表中的所有行生成读取事件。此参数确定 MySQL 连接是否会将表的所有结果拉入内存（速度很快但需要大量内存），或者是否将结果改为流式传输（可能较慢，但适用于非常大的表）。该值指定在连接器流式传输结果之前表必须包含的最小行数，默认为 1,000。将此参数设置为'0'以跳过所有表大小检查并始终在快照期间流式传输所有结果。</td></tr><tr><td>connect.timeout</td><td>optional</td><td>30s</td><td>Duration</td><td>连接器在尝试连接到 MySQL 数据库服务器后在超时之前应等待的最长时间。</td></tr><tr><td>connect.max-retries</td><td>optional</td><td>3</td><td>Integer</td><td>连接器应重试以建立 MySQL 数据库服务器连接的最大重试次数。</td></tr><tr><td>connection.pool.size</td><td>optional</td><td>20</td><td>Integer</td><td>连接池大小。</td></tr><tr><td>jdbc.properties.*</td><td>optional</td><td>20</td><td>String</td><td>传递自定义 JDBC URL 属性的选项。用户可以传递自定义属性，例如 'jdbc.properties.useSSL' = 'false'。</td></tr><tr><td>heartbeat.interval</td><td>optional</td><td>30s</td><td>Duration</td><td>发送心跳事件的时间间隔，用于跟踪最新可用的 Binlog 偏移量。</td></tr><tr><td>append-mode</td><td>optional</td><td>false</td><td>Boolean</td><td>是否仅支持 Append，如果为 'true'，MySQL Extract Node 会将所有 Upsert 流转换为 Append 流，以支持不支持 Upsert 流的下游场景。</td></tr><tr><td>migrate-all</td><td>optional</td><td>false</td><td>Boolean</td><td>是否是全库迁移场景，如果为 'true'，MySQL Extract Node 则将表的物理字段和其他元字段压缩成 'json' 格式的特殊 'data' 元字段, 目前支持两种 data 格式, 如果需要 'canal json' 格式的数据， 则使用 'data<!-- -->_<!-- -->canal' 元数据字段，如果需要使用 'debezium json' 格式的数据则使用 'data<!-- -->_<!-- -->debezium' 元数据字段。</td></tr><tr><td>row-kinds-filtered</td><td>optional</td><td>false</td><td>Boolean</td><td>需要保留的特定的操作类型，其中 +U 对应更新前的数据，-U 对应更新后的数据，+I 对应 插入的数据（存量数据为插入类型的数据），-D 代表删除的数据， 如需保留多个操作类型则使用 & 连接。 举例 +I&-D，connector 只会输出插入以及删除的数据，更新的数据则不会输出。</td></tr><tr><td>debezium.*</td><td>optional</td><td>(none)</td><td>String</td><td>将 Debezium 的属性传递给用于从 MySQL 服务器捕获数据更改的 Debezium Embedded Engine。 例如：<code>'debezium.snapshot.mode' = 'never'</code>。 详细了解 <a href="https://debezium.io/documentation/reference/1.5/connectors/mysql.html#mysql-connector-properties" target="_blank" rel="noopener noreferrer">Debezium 的 MySQL 连接器属性。</a></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=<!-- -->[groupId]<!-- -->&streamId=<!-- -->[streamId]<!-- -->&nodeId=<!-- -->[nodeId]<!-- -->。</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。</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>meta.table_name</td><td>STRING NOT NULL</td><td>该行所属的表名。</td></tr><tr><td>meta.database_name</td><td>STRING NOT NULL</td><td>该行所属的数据库名称。</td></tr><tr><td>meta.op_ts</td><td>TIMESTAMP_LTZ(3) NOT NULL</td><td>它指示在数据库中进行更改的时间。<br>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>meta.op_type</td><td>STRING</td><td>数据库操作的类型，如 INSERT/DELETE 等。</td></tr><tr><td>meta.data_canal</td><td>STRING/BYTES</td><td>`<!-- -->canal-json<!-- -->`<!-- --> 格式化的行的数据只有在 <!-- -->`<!-- -->migrate-all<!-- -->`<!-- --> 选项为 'true' 时才存在。</td></tr><tr><td>meta.data_debezium</td><td>STRING/BYTES</td><td>`<!-- -->debezium-json<!-- -->`<!-- --> 格式化的行的数据只有在 <!-- -->`<!-- -->migrate-all<!-- -->`<!-- --> 选项为 'true' 时才存在。</td></tr><tr><td>meta.is_ddl</td><td>BOOLEAN</td><td>是否是 DDL 语句。</td></tr><tr><td>meta.ts</td><td>TIMESTAMP_LTZ(3) NOT NULL</td><td>接收和处理行的当前时间。</td></tr><tr><td>meta.sql_type</td><td>MAP</td><td>将 Sql_type 表字段映射到 Java 数据类型 Id。</td></tr><tr><td>meta.mysql_type</td><td>MAP</td><td>表的结构。</td></tr><tr><td>meta.pk_names</td><td>ARRAY</td><td>表的主键名称。</td></tr><tr><td>meta.batch_id</td><td>BIGINT</td><td>Binlog的批次id。</td></tr><tr><td>meta.update_before</td><td>ARRAY</td><td>该行更新前的数据。</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">mysql_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)">'meta.database_name'</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)">'meta.table_name'</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)">'meta.op_ts'</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)">'meta.op_type'</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)">'meta.batch_id'</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)">'meta.is_ddl'</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"><</span><span class="token plain">MAP</span><span class="token operator"><</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">>></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)">'meta.update_before'</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"><</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">></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)">'meta.mysql_type'</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"><</span><span class="token plain">STRING</span><span class="token operator">></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)">'meta.pk_names'</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)">'meta.data_canal'</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"><</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">></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)">'meta.sql_type'</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">ingestion_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)">'meta.ts'</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)">'connector'</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)">'mysql-cdc-inlong'</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)">'hostname'</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)">'YourHostname'</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)">'migrate-all'</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)">'true'</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)">'port'</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)">'3306'</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)">'username'</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)">'YourUsername'</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)">'password'</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)">'YourPassword'</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)">'database-name'</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)">'YourDatabase'</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)">'table-name'</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)">'YourTable'</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)">'row-kinds-filtered'</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)">'+I'</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 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><table><thead><tr><th>MySQL type</th><th>Flink SQL type</th><th>NOTE</th></tr></thead><tbody><tr><td>TINYINT</td><td>TINYINT</td><td></td></tr><tr><td>SMALLINT<br>TINYINT UNSIGNED</td><td>SMALLINT</td><td></td></tr><tr><td>INT<br>MEDIUMINT<br>SMALLINT UNSIGNED</td><td>INT</td><td></td></tr><tr><td>BIGINT<br>INT UNSIGNED</td><td>BIGINT</td><td></td></tr><tr><td>BIGINT UNSIGNED</td><td>DECIMAL(20, 0)</td><td></td></tr><tr><td>REAL<br>FLOAT</td><td>FLOAT</td><td></td></tr><tr><td>DOUBLE</td><td>DOUBLE</td><td></td></tr><tr><td>NUMERIC(p, s)<br>DECIMAL(p, s)<br>where p <= 38</td><td>DECIMAL(p, s)</td><td></td></tr><tr><td>NUMERIC(p, s)<br>DECIMAL(p, s)<br>where 38 < p <= 65</td><td>STRING</td><td>在 MySQL 中，十进制数据类型的精度高达 65，但在 Flink 中，十进制数据类型的精度仅限于 38。所以，如果定义精度大于 38 的十进制列，则应将其映射到字符串以避免精度损失。在 MySQL 中，十进制数据类型的精度高达65，但在Flink中，十进制数据类型的精度仅限于38。所以，如果定义精度大于 38 的十进制列，则应将其映射到字符串以避免精度损失。</td></tr><tr><td>BOOLEAN<br>TINYINT(1)<br>BIT(1)</td><td>BOOLEAN</td><td></td></tr><tr><td>DATE</td><td>DATE</td><td></td></tr><tr><td>TIME <!-- -->[(p)]</td><td>TIME <!-- -->[(p)]</td><td></td></tr><tr><td>TIMESTAMP <!-- -->[(p)]<br>DATETIME <!-- -->[(p)]</td><td>TIMESTAMP <!-- -->[(p)]</td><td></td></tr><tr><td>CHAR(n)</td><td>CHAR(n)</td><td></td></tr><tr><td>VARCHAR(n)</td><td>VARCHAR(n)</td><td></td></tr><tr><td>BIT(n)</td><td>BINARY(⌈n/8⌉)</td><td></td></tr><tr><td>BINARY(n)</td><td>BINARY(n)</td><td></td></tr><tr><td>VARBINARY(N)</td><td>VARBINARY(N)</td><td></td></tr><tr><td>TINYTEXT<br>TEXT<br>MEDIUMTEXT<br>LONGTEXT</td><td>STRING</td><td></td></tr><tr><td>TINYBLOB<br>BLOB<br>MEDIUMBLOB<br>LONGBLOB</td><td>BYTES</td><td>目前，对于 MySQL 中的 BLOB 数据类型，仅支持长度不大于 2147483647（2**31-1）的 blob。</td></tr><tr><td>YEAR</td><td>INT</td><td></td></tr><tr><td>ENUM</td><td>STRING</td><td></td></tr><tr><td>JSON</td><td>STRING</td><td>JSON 数据类型将在 Flink 中转换为 JSON 格式的字符串。</td></tr><tr><td>SET</td><td>ARRAY<!-- --><<!-- -->STRING<!-- -->></td><td>因为 MySQL 中的 SET 数据类型是一个字符串对象，可以有零个或多个值 它应该始终映射到字符串数组。</td></tr></tbody></table><h2 class="anchor anchorWithStickyNavbar_LWe7" id="特性">特性<a href="#特性" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="多库多表同步">多库多表同步<a href="#多库多表同步" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h3><p>Mysql Extract 节点支持整库、多表同步。开启该功能后，Mysql Extract 节点会将表的物理字段压缩成 'canal-json' 格式的特殊元字段 'data_canal'，也可配置为 'debezium-json' 格式的元数据字段 'data_debezium'。</p><p>配置参数：</p><table><thead><tr><th>参数</th><th>是否必须</th><th>默认值</th><th>数据类型</th><th>描述</th></tr></thead><tbody><tr><td>migrate-all</td><td>optional</td><td>false</td><td>String</td><td>开启整库迁移模式，所有的物理字段通过 data_canal 字段获取</td></tr><tr><td>table-name</td><td>optional</td><td>false</td><td>String</td><td>需要读取的表的正则表达式，database 和 table 之间使用 "<!-- -->.<!-- -->" 分隔，多个正则表达式使用 "," 分隔</td></tr><tr><td>database-name</td><td>optional</td><td>false</td><td>String</td><td>需要读取的库的表达式，多个正则表达式使用 "," 分隔</td></tr></tbody></table><p>CREATE TABLE 示例演示该功能语法：</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">table_1</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><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)">'meta.data_canal'</span><span class="token plain"> VIRTUAL</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">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)">'inlong.metric.labels'</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)">'groupId=1&streamId=1&nodeId=1'</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)">'migrate-all'</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)">'true'</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)">'connector'</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)">'mysql-cdc-inlong'</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)">'hostname'</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)">'localhost'</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)">'database-name'</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)">'test,test01'</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)">'username'</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)">'root'</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)">'password'</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)">'inlong'</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)">'table-name'</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)">'test01\.a{2}[0-9]$, test\.[\s\S]*'</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><h3 class="anchor anchorWithStickyNavbar_LWe7" id="启动模式">启动模式<a href="#启动模式" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h3><p>配置选项<code>scan.startup.mode</code>指定 MySQL CDC 使用者的启动模式。有效枚举包括：</p><ul><li><code>initial</code> （默认）：在第一次启动时对受监视的数据库表执行初始快照，并继续读取最新的 binlog。</li><li><code>earliest-offset</code>：跳过快照阶段，从可读取的最早 binlog 位点开始读取</li><li><code>latest-offset</code>：首次启动时，从不对受监视的数据库表执行快照， 连接器仅从 binlog 的结尾处开始读取，这意味着连接器只能读取在连接器启动之后的数据更改。</li><li><code>specific-offset</code>：跳过快照阶段，从指定的 binlog 位点开始读取。位点可通过 binlog 文件名和位置指定，或者在 GTID 在集群上启用时通过 GTID 集合指定。</li><li><code>timestamp</code>：跳过快照阶段，从指定的时间戳开始读取 binlog 事件。</li></ul><p>例如使用 DataStream API:</p><div class="language-java codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#F8F8F2;--prism-background-color:#282A36"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-java codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#F8F8F2"><span class="token plain">MySQLSource.builder()</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> .startupOptions(StartupOptions.earliest()) // 从最早位点启动</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> .startupOptions(StartupOptions.latest()) // 从最晚位点启动</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> .startupOptions(StartupOptions.specificOffset("mysql-bin.000003", 4L) // 从指定 binlog 文件名和位置启动</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> .startupOptions(StartupOptions.specificOffset("24DA167-0C0C-11E8-8442-00059A3C7B00:1-19")) // 从 GTID 集合启动</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> .startupOptions(StartupOptions.timestamp(1667232000000L) // 从时间戳启动</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"> .build()</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><p>使用 SQL:</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 plain">CREATE TABLE mysql_source (...) WITH (</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 'connector' = 'mysql-cdc',</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 'scan.startup.mode' = 'earliest-offset', -- 从最早位点启动</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 'scan.startup.mode' = 'latest-offset', -- 从最晚位点启动</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 'scan.startup.mode' = 'specific-offset', -- 从特定位点启动</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 'scan.startup.mode' = 'timestamp', -- 从特定位点启动</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 'scan.startup.specific-offset.file' = 'mysql-bin.000003', -- 在特定位点启动模式下指定 binlog 文件名</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 'scan.startup.specific-offset.pos' = '4', -- 在特定位点启动模式下指定 binlog 位置</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 'scan.startup.specific-offset.gtid-set' = '24DA167-0C0C-11E8-8442-00059A3C7B00:1-19', -- 在特定位点启动模式下指定 GTID 集合</span><br></span><span class="token-line" style="color:#F8F8F2"><span class="token plain"> 'scan.startup.timestamp-millis' = '1667232000000' -- 在时间戳启动模式下指定启动时间戳</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><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><div class="theme-admonition theme-admonition-caution alert alert--warning admonition_LlT9"><div class="admonitionHeading_tbUL"><span class="admonitionIcon_kALy"><svg viewBox="0 0 16 16"><path fill-rule="evenodd" d="M8.893 1.5c-.183-.31-.52-.5-.887-.5s-.703.19-.886.5L.138 13.499a.98.98 0 0 0 0 1.001c.193.31.53.501.886.501h13.964c.367 0 .704-.19.877-.5a1.03 1.03 0 0 0 .01-1.002L8.893 1.5zm.133 11.497H6.987v-2.003h2.039v2.003zm0-3.004H6.987V5.987h2.039v4.006z"></path></svg></span>警告</div><div class="admonitionContent_S0QG"><ul><li>MySQL source 会在 checkpoint 时将当前位点以 INFO 级别打印到日志中，日志前缀为 "Binlog offset on checkpoint {checkpoint-id}"。 |
| 该日志可以帮助将作业从某个 checkpoint 的位点开始启动的场景。</li><li>如果捕获变更的表曾经发生过表结构变化，从最早位点、特定位点或时间戳启动可能会发生错误，因为 Debezium 读取器会在内部保存当前的最新表结构，结构不匹配的早期数据无法被正确解析。</li></ul></div></div></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-1.9.0/data_node/extract_node/mysql-cdc.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 docusaurus-mt-lg" aria-label="Docs pages navigation"><a class="pagination-nav__link pagination-nav__link--prev" 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