zh/UserGuide/latest-Table/API/Programming-Python-Native-API_apache.html - iotdb-website - Git at Google

 <!doctype html>
 <html lang="zh-CN" data-theme="light">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width,initial-scale=1" />
     <meta name="generator" content="VuePress 2.0.0-rc.26" />
     <meta name="theme" content="VuePress Theme Hope 2.0.0-rc.99" />
     <style>
       :root {
         --vp-c-bg: #fff;
       }

       [data-theme="dark"] {
         --vp-c-bg: #1b1b1f;
       }

       html,
       body {
         background: var(--vp-c-bg);
       }
     </style>
     <script>
       const userMode = localStorage.getItem("vuepress-theme-hope-scheme");
       const systemDarkMode =
         window.matchMedia &&
         window.matchMedia("(prefers-color-scheme: dark)").matches;

       if (userMode === "dark" || (userMode !== "light" && systemDarkMode)) {
         document.documentElement.setAttribute("data-theme", "dark");
       }
     </script>
     <script type="application/ld+json">{"@context":"https://schema.org","@type":"Article","headline":"Python 原生接口","image":[""],"dateModified":"2026-04-15T10:39:00.000Z","author":[]}</script><meta property="og:url" content="https://iotdb.apache.org/zh/UserGuide/latest-Table/API/Programming-Python-Native-API_apache.html"><meta property="og:site_name" content="IoTDB Website"><meta property="og:title" content="Python 原生接口"><meta property="og:description" content="Python 原生接口 1. 使用方式 安装依赖包: 注意：请勿使用高版本客户端连接低版本服务。 2. 读写操作 2.1 TableSession 2.1.1 功能描述 TableSession是IoTDB的一个核心类，用于与IoTDB数据库进行交互。通过这个类，用户可以执行SQL语句、插入数据以及管理数据库会话。 2.1.2 方法列表 自 V2.0...."><meta property="og:type" content="article"><meta property="og:locale" content="zh-CN"><meta property="og:locale:alternate" content="en-US"><meta property="og:updated_time" content="2026-04-15T10:39:00.000Z"><meta property="article:modified_time" content="2026-04-15T10:39:00.000Z"><link rel="alternate" hreflang="en-us" href="https://iotdb.apache.org/UserGuide/latest-Table/API/Programming-Python-Native-API_apache.html"><script async src="https://widget.kapa.ai/kapa-widget.bundle.js" data-website-id="2d37bfdd-8d98-40ba-9223-9d4f81bfb327" data-project-name="Apache IoTDB" data-project-color="#FFFFFF" data-button-z-index="1999" data-button-padding="4px" data-button-border-radius="4px" data-button-image-height="24px" data-button-image-width="20px" data-button-text-color="#9E2878" data-project-logo="https://iotdb.apache.org/img/logo.svg" data-button-position-right="16px" data-button-position-bottom="8px" data-button-height="56px" data-button-width="48px" data-button-text="Ask" data-modal-override-open-selector="#custom-ask-ai-button" data-modal-image-width="150px" data-modal-title="AI Docs" data-modal-title-color="#9E2878" data-deep-thinking-button-active-bg-color="#F6F7F8" data-deep-thinking-button-active-text-color="#9E2878" data-deep-thinking-button-active-hover-text-color="#9E2878" data-modal-disclaimer="这是一个针对 Apache IoTDB 的定制化大型语言模型，能够访问所有[文档](iotdb.apache.org/docs/)、[GitHub 公开问题、PR 和自述文件](github.com/apache/iotdb)。&#10;&#10;

 如果您遇到 <Error in verifying browser for feedback submission. Captcha token could not be obtained.> 请确保您能够顺畅访问 Google 服务。" data-user-analytics-fingerprint-enabled="true" data-consent-required="true" data-consent-screen-disclaimer="点击<I agree, let's chat>即表示您同意按照 kapa.ai 的[隐私政策](https://www.kapa.ai/content/privacy-policy)使用 AI 助手。本服务使用 reCAPTCHA，您需要同意 Google 的[隐私政策](https://policies.google.com/privacy)和[服务条款](https://policies.google.com/terms)。继续操作即表示您明确同意 kapa.ai 和 Google 的隐私政策。" data-language="zh"></script><link rel="icon" href="/favicon.ico"><meta name="Description" content="Apache IoTDB: Time Series Database for IoT"><meta name="Keywords" content="TSDB, time series, time series database, IoTDB, IoT database, IoT data management, 时序数据库, 时间序列管理, IoTDB, 物联网数据库, 实时数据库, 物联网数据管理, 物联网数据"><meta name="baidu-site-verification" content="wfKETzB3OT"><meta name="google-site-verification" content="mZWAoRY0yj_HAr-s47zHCGHzx5Ju-RVm5wDbPnwQYFo"><script type="text/javascript">var _paq = window._paq = window._paq || [];
 /* tracker methods like "setCustomDimension" should be called before "trackPageView" */
 _paq.push(["setDoNotTrack", true]);
 _paq.push(["disableCookies"]);
 _paq.push(['trackPageView']);
 _paq.push(['enableLinkTracking']);
 (function() {
   var u="https://analytics.apache.org/";
   _paq.push(['setTrackerUrl', u+'matomo.php']);
   _paq.push(['setSiteId', '56']);
   var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0];
   g.async=true; g.src=u+'matomo.js'; s.parentNode.insertBefore(g,s);
 })();
 </script><title>Python 原生接口 | IoTDB Website</title><meta name="description" content="Python 原生接口 1. 使用方式 安装依赖包: 注意：请勿使用高版本客户端连接低版本服务。 2. 读写操作 2.1 TableSession 2.1.1 功能描述 TableSession是IoTDB的一个核心类，用于与IoTDB数据库进行交互。通过这个类，用户可以执行SQL语句、插入数据以及管理数据库会话。 2.1.2 方法列表 自 V2.0....">
     <link rel="preload" href="/assets/style-JraSdRX4.css" as="style"><link rel="stylesheet" href="/assets/style-JraSdRX4.css">
     <link rel="modulepreload" href="/assets/app-Bs_hKxCZ.js"><link rel="modulepreload" href="/assets/Programming-Python-Native-API_apache.html-QgMKFPui.js">

   </head>
   <body>
     <div id="app"><!--[--><!--[--><!--[--><span tabindex="-1"></span><a href="#main-content" class="vp-skip-link sr-only">跳至主要內容</a><!--]--><!--[--><div class="theme-container external-link-icon has-toc" vp-container><!--[--><header id="navbar" class="vp-navbar" vp-navbar><div class="vp-navbar-start"><button type="button" class="vp-toggle-sidebar-button" title="Toggle Sidebar"><span class="icon"></span></button><!--[--><a class="route-link vp-brand" href="/zh/" aria-label="带我回家"><img class="vp-nav-logo" src="/logo.png" alt><!----><!----></a><!--]--></div><div class="vp-navbar-center"><!--[--><!--]--></div><div class="vp-navbar-end"><!--[--><!--[--><div id="docsearch-container" style="display:none;"></div><div class="docsearch-placeholder"><button type="button" aria-label="搜索文档" aria-keyshortcuts="Control+k" class="DocSearch DocSearch-Button"><span class="DocSearch-Button-Container"><svg width="20" height="20" viewBox="0 0 24 24" aria-hidden="true" class="DocSearch-Search-Icon"><circle cx="11" cy="11" r="8" stroke="currentColor" fill="none" stroke-width="1.4"></circle><path d="m21 21-4.3-4.3" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"></path></svg><span class="DocSearch-Button-Placeholder">搜索文档</span></span><span class="DocSearch-Button-Keys"><kbd class="DocSearch-Button-Key DocSearch-Button-Key--ctrl">Ctrl</kbd><kbd class="DocSearch-Button-Key">K</kbd></span></button></div><!--]--><div><button id="custom-ask-ai-button"> ✨ Ask AI </button></div><nav class="vp-nav-links"><div class="vp-nav-item hide-in-mobile"><div class="vp-dropdown-wrapper"><button type="button" class="vp-dropdown-title" aria-label="文档"><!--[--><!---->文档<!--]--><span class="arrow"></span><ul class="vp-dropdown"><li class="vp-dropdown-item"><a class="route-link auto-link" href="/zh/UserGuide/latest/QuickStart/QuickStart_apache.html" aria-label="v2.0.x"><!---->v2.0.x<!----></a></li><li class="vp-dropdown-item"><a class="route-link auto-link" href="/zh/UserGuide/V1.3.x/QuickStart/QuickStart_apache.html" aria-label="v1.3.x"><!---->v1.3.x<!----></a></li><li class="vp-dropdown-item"><a class="route-link auto-link" href="/zh/UserGuide/V1.2.x/QuickStart/QuickStart.html" aria-label="v1.2.x"><!---->v1.2.x<!----></a></li><li class="vp-dropdown-item"><a class="route-link auto-link" href="/zh/UserGuide/V0.13.x/QuickStart/QuickStart.html" aria-label="v0.13.x"><!---->v0.13.x<!----></a></li></ul></button></div></div><div class="vp-nav-item hide-in-mobile"><a class="auto-link external-link" href="https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=177051872" aria-label="系统设计" rel="noopener noreferrer" target="_blank"><!---->系统设计<!----></a></div><div class="vp-nav-item hide-in-mobile"><a class="route-link auto-link" href="/zh/Download/" aria-label="下载"><!---->下载<!----></a></div><div class="vp-nav-item hide-in-mobile"><div class="vp-dropdown-wrapper"><button type="button" class="vp-dropdown-title" aria-label="社区"><!--[--><!---->社区<!--]--><span class="arrow"></span><ul class="vp-dropdown"><li class="vp-dropdown-item"><a class="route-link auto-link" href="/zh/Community/About.html" aria-label="关于社区"><!---->关于社区<!----></a></li><li class="vp-dropdown-item"><a class="route-link auto-link" href="/zh/Community/Development-Guide.html" aria-label="贡献指南"><!---->贡献指南<!----></a></li><li class="vp-dropdown-item"><a class="route-link auto-link" href="/zh/Community/Community-Partners.html" aria-label="社区伙伴"><!---->社区伙伴<!----></a></li><li class="vp-dropdown-item"><a class="route-link auto-link" href="/zh/Community/Feedback.html" aria-label="交流与反馈"><!---->交流与反馈<!----></a></li><li class="vp-dropdown-item"><a class="route-link auto-link" href="/zh/Community/Events-and-Reports.html" aria-label="活动与报告"><!---->活动与报告<!----></a></li><li class="vp-dropdown-item"><a class="route-link auto-link" href="/zh/Community/Committers.html" aria-label="Committers"><!---->Committers<!----></a></li></ul></button></div></div><div class="vp-nav-item hide-in-mobile"><div class="vp-dropdown-wrapper"><button type="button" class="vp-dropdown-title" aria-label="ASF"><!--[--><!---->ASF<!--]--><span class="arrow"></span><ul class="vp-dropdown"><li class="vp-dropdown-item"><a class="auto-link external-link" href="https://www.apache.org/" aria-label="基金会" rel="noopener noreferrer" target="_blank"><!---->基金会<!----></a></li><li class="vp-dropdown-item"><a class="auto-link external-link" href="https://www.apache.org/licenses/" aria-label="许可证" rel="noopener noreferrer" target="_blank"><!---->许可证<!----></a></li><li class="vp-dropdown-item"><a class="auto-link external-link" href="https://www.apache.org/security/" aria-label="安全" rel="noopener noreferrer" target="_blank"><!---->安全<!----></a></li><li class="vp-dropdown-item"><a class="auto-link external-link" href="https://www.apache.org/foundation/sponsorship.html" aria-label="赞助" rel="noopener noreferrer" target="_blank"><!---->赞助<!----></a></li><li class="vp-dropdown-item"><a class="auto-link external-link" href="https://www.apache.org/foundation/thanks.html" aria-label="致谢" rel="noopener noreferrer" target="_blank"><!---->致谢<!----></a></li><li class="vp-dropdown-item"><a class="auto-link external-link" href="https://www.apache.org/events/current-event" aria-label="活动" rel="noopener noreferrer" target="_blank"><!---->活动<!----></a></li><li class="vp-dropdown-item"><a class="auto-link external-link" href="https://privacy.apache.org/policies/privacy-policy-public.html" aria-label="隐私" rel="noopener noreferrer" target="_blank"><!---->隐私<!----></a></li></ul></button></div></div></nav><div class="vp-nav-item"><div class="vp-dropdown-wrapper"><button type="button" class="vp-dropdown-title" aria-label="选择语言"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon i18n-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="i18n icon" name="i18n" style="width:1rem;height:1rem;vertical-align:middle;"><path d="M379.392 460.8 494.08 575.488l-42.496 102.4L307.2 532.48 138.24 701.44l-71.68-72.704L234.496 460.8l-45.056-45.056c-27.136-27.136-51.2-66.56-66.56-108.544h112.64c7.68 14.336 16.896 27.136 26.112 35.84l45.568 46.08 45.056-45.056C382.976 312.32 409.6 247.808 409.6 204.8H0V102.4h256V0h102.4v102.4h256v102.4H512c0 70.144-37.888 161.28-87.04 210.944L378.88 460.8zM576 870.4 512 1024H409.6l256-614.4H768l256 614.4H921.6l-64-153.6H576zM618.496 768h196.608L716.8 532.48 618.496 768z"></path></svg><!--]--><span class="arrow"></span><ul class="vp-dropdown"><li class="vp-dropdown-item"><a class="route-link auto-link" href="/UserGuide/latest-Table/API/Programming-Python-Native-API_apache.html" aria-label="English"><!---->English<!----></a></li><li class="vp-dropdown-item"><a class="route-link route-link-active auto-link" href="/zh/UserGuide/latest-Table/API/Programming-Python-Native-API_apache.html" aria-label="简体中文"><!---->简体中文<!----></a></li></ul></button></div></div><div class="vp-nav-item hide-in-mobile"><button type="button" class="vp-color-mode-switch" id="color-mode-switch"><svg xmlns="http://www.w3.org/2000/svg" class="icon auto-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="auto icon" name="auto" style="display:none;"><path d="M512 992C246.92 992 32 777.08 32 512S246.92 32 512 32s480 214.92 480 480-214.92 480-480 480zm0-840c-198.78 0-360 161.22-360 360 0 198.84 161.22 360 360 360s360-161.16 360-360c0-198.78-161.22-360-360-360zm0 660V212c165.72 0 300 134.34 300 300 0 165.72-134.28 300-300 300z"></path></svg><svg xmlns="http://www.w3.org/2000/svg" class="icon dark-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="dark icon" name="dark" style="display:none;"><path d="M524.8 938.667h-4.267a439.893 439.893 0 0 1-313.173-134.4 446.293 446.293 0 0 1-11.093-597.334A432.213 432.213 0 0 1 366.933 90.027a42.667 42.667 0 0 1 45.227 9.386 42.667 42.667 0 0 1 10.24 42.667 358.4 358.4 0 0 0 82.773 375.893 361.387 361.387 0 0 0 376.747 82.774 42.667 42.667 0 0 1 54.187 55.04 433.493 433.493 0 0 1-99.84 154.88 438.613 438.613 0 0 1-311.467 128z"></path></svg><svg xmlns="http://www.w3.org/2000/svg" class="icon light-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="light icon" name="light" style="display:block;"><path d="M952 552h-80a40 40 0 0 1 0-80h80a40 40 0 0 1 0 80zM801.88 280.08a41 41 0 0 1-57.96-57.96l57.96-58a41.04 41.04 0 0 1 58 58l-58 57.96zM512 752a240 240 0 1 1 0-480 240 240 0 0 1 0 480zm0-560a40 40 0 0 1-40-40V72a40 40 0 0 1 80 0v80a40 40 0 0 1-40 40zm-289.88 88.08-58-57.96a41.04 41.04 0 0 1 58-58l57.96 58a41 41 0 0 1-57.96 57.96zM192 512a40 40 0 0 1-40 40H72a40 40 0 0 1 0-80h80a40 40 0 0 1 40 40zm30.12 231.92a41 41 0 0 1 57.96 57.96l-57.96 58a41.04 41.04 0 0 1-58-58l58-57.96zM512 832a40 40 0 0 1 40 40v80a40 40 0 0 1-80 0v-80a40 40 0 0 1 40-40zm289.88-88.08 58 57.96a41.04 41.04 0 0 1-58 58l-57.96-58a41 41 0 0 1 57.96-57.96z"></path></svg></button></div><div class="vp-nav-item vp-action"><a class="vp-action-link" href="https://github.com/apache/iotdb" target="_blank" rel="noopener noreferrer" aria-label="GitHub"><svg xmlns="http://www.w3.org/2000/svg" class="icon github-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="github icon" name="github" style="width:1.25rem;height:1.25rem;vertical-align:middle;"><path d="M511.957 21.333C241.024 21.333 21.333 240.981 21.333 512c0 216.832 140.544 400.725 335.574 465.664 24.49 4.395 32.256-10.07 32.256-23.083 0-11.69.256-44.245 0-85.205-136.448 29.61-164.736-64.64-164.736-64.64-22.315-56.704-54.4-71.765-54.4-71.765-44.587-30.464 3.285-29.824 3.285-29.824 49.195 3.413 75.179 50.517 75.179 50.517 43.776 75.008 114.816 53.333 142.762 40.79 4.523-31.66 17.152-53.377 31.19-65.537-108.971-12.458-223.488-54.485-223.488-242.602 0-53.547 19.114-97.323 50.517-131.67-5.035-12.33-21.93-62.293 4.779-129.834 0 0 41.258-13.184 134.912 50.346a469.803 469.803 0 0 1 122.88-16.554c41.642.213 83.626 5.632 122.88 16.554 93.653-63.488 134.784-50.346 134.784-50.346 26.752 67.541 9.898 117.504 4.864 129.834 31.402 34.347 50.474 78.123 50.474 131.67 0 188.586-114.73 230.016-224.042 242.09 17.578 15.232 33.578 44.672 33.578 90.454v135.85c0 13.142 7.936 27.606 32.854 22.87C862.25 912.597 1002.667 728.747 1002.667 512c0-271.019-219.648-490.667-490.71-490.667z"></path></svg></a></div><!--]--><button type="button" class="vp-toggle-navbar-button" aria-label="Toggle Navbar" aria-expanded="false" aria-controls="nav-screen"><span><span class="vp-top"></span><span class="vp-middle"></span><span class="vp-bottom"></span></span></button></div></header><!----><!--]--><!----><div class="toggle-sidebar-wrapper"><span class="arrow start"></span></div><aside id="sidebar" class="vp-sidebar" vp-sidebar><!--[--><p class="vp-sidebar-header iotdb-sidebar-header"><span class="vp-sidebar-title">IoTDB用户手册(V2.0.x)</span></p><div class="sidebar-top-wrapper"><ul class="switch-list"><li class="switch-type">树模型</li><li class="switch-type switch-active">表模型</li></ul><div class="help-icon-wrapper"><div class="help-icon"><span>模型说明</span></div></div></div><!--]--><ul class="vp-sidebar-links"><li><section class="vp-sidebar-group"><p class="vp-sidebar-header"><!----><span class="vp-sidebar-title">IoTDB用户手册(V2.0.x)</span><!----></p><ul class="vp-sidebar-links"></ul></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">关于IoTDB</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">预备知识</span><span class="vp-arrow end"></span></button><!----></section></li><li><a class="route-link auto-link vp-sidebar-link" href="/zh/UserGuide/latest-Table/QuickStart/QuickStart_apache.html" aria-label="快速上手"><!---->快速上手<!----></a></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">安装部署</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">基础功能</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">高级功能</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">AI 能力</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">工具体系</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable active" type="button"><!----><span class="vp-sidebar-title">应用编程接口</span><span class="vp-arrow down"></span></button><ul class="vp-sidebar-links"><li><a class="route-link auto-link vp-sidebar-link" href="/zh/UserGuide/latest-Table/API/Programming-Java-Native-API_apache.html" aria-label="Java原生接口"><!---->Java原生接口<!----></a></li><li><a class="route-link route-link-active auto-link vp-sidebar-link active" href="/zh/UserGuide/latest-Table/API/Programming-Python-Native-API_apache.html" aria-label="Python原生接口"><!---->Python原生接口<!----></a></li><li><a class="route-link auto-link vp-sidebar-link" href="/zh/UserGuide/latest-Table/API/Programming-Cpp-Native-API_apache.html" aria-label="C++原生接口"><!---->C++原生接口<!----></a></li><li><a class="route-link auto-link vp-sidebar-link" href="/zh/UserGuide/latest-Table/API/Programming-Go-Native-API_apache.html" aria-label="GO原生接口"><!---->GO原生接口<!----></a></li><li><a class="route-link auto-link vp-sidebar-link" href="/zh/UserGuide/latest-Table/API/Programming-CSharp-Native-API_apache.html" aria-label="C#原生接口"><!---->C#原生接口<!----></a></li><li><a class="route-link auto-link vp-sidebar-link" href="/zh/UserGuide/latest-Table/API/Programming-JDBC_apache.html" aria-label="JDBC"><!---->JDBC<!----></a></li><li><a class="route-link auto-link vp-sidebar-link" href="/zh/UserGuide/latest-Table/API/Programming-MQTT_apache.html" aria-label="MQTT协议"><!---->MQTT协议<!----></a></li><li><a class="route-link auto-link vp-sidebar-link" href="/zh/UserGuide/latest-Table/API/RestServiceV1_apache.html" aria-label="RESTAPI V1 "><!---->RESTAPI V1 <!----></a></li></ul></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">生态集成</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">SQL手册</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">技术内幕</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">附录</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">FAQ</span><span class="vp-arrow end"></span></button><!----></section></li></ul><!----></aside><!--[--><main id="main-content" class="vp-page"><!--[--><!----><!----><nav class="vp-breadcrumb disable"></nav><div class="vp-page-title"><h1><!---->Python 原生接口</h1><div class="page-info"><!----><!----><span class="page-date-info" aria-label="写作日期📅" data-balloon-pos="up"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon" name="calendar"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span data-allow-mismatch="text">2025/1/3</span><meta property="datePublished" content="2025-01-03T10:29:25.000Z"></span><!----><span class="page-reading-time-info" aria-label="阅读时间⌛" data-balloon-pos="up"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="timer icon" name="timer"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>大约 8 分钟</span><meta property="timeRequired" content="PT8M"></span><!----><!----></div><hr></div><!----><div class="" vp-content><!----><div id="markdown-content"><h1 id="python-原生接口" tabindex="-1"><a class="header-anchor" href="#python-原生接口"><span>Python 原生接口</span></a></h1><h2 id="_1-使用方式" tabindex="-1"><a class="header-anchor" href="#_1-使用方式"><span>1. 使用方式</span></a></h2><p>安装依赖包:</p><div class="language-shell line-numbers-mode" data-highlighter="shiki" data-ext="shell" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-shell"><span class="line"><span style="color:#61AFEF;">pip3</span><span style="color:#98C379;"> install</span><span style="color:#98C379;"> apache-iotd</span><span style="color:#ABB2BF;">b&gt;</span><span style="color:#98C379;">=</span><span style="color:#D19A66;">2.0</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div></div></div><p>注意：请勿使用高版本客户端连接低版本服务。</p><h2 id="_2-读写操作" tabindex="-1"><a class="header-anchor" href="#_2-读写操作"><span>2. 读写操作</span></a></h2><h3 id="_2-1-tablesession" tabindex="-1"><a class="header-anchor" href="#_2-1-tablesession"><span>2.1 TableSession</span></a></h3><h4 id="_2-1-1-功能描述" tabindex="-1"><a class="header-anchor" href="#_2-1-1-功能描述"><span>2.1.1 功能描述</span></a></h4><p>TableSession是IoTDB的一个核心类，用于与IoTDB数据库进行交互。通过这个类，用户可以执行SQL语句、插入数据以及管理数据库会话。</p><h4 id="_2-1-2-方法列表" tabindex="-1"><a class="header-anchor" href="#_2-1-2-方法列表"><span>2.1.2 方法列表</span></a></h4><table><thead><tr><th><strong>方法名称</strong></th><th><strong>描述</strong></th><th><strong>参数类型</strong></th><th><strong>返回类型</strong></th></tr></thead><tbody><tr><td>insert</td><td>写入数据</td><td>tablet: Union[Tablet, NumpyTablet]</td><td>None</td></tr><tr><td>execute_non_query_statement</td><td>执行非查询 SQL 语句，如 DDL 和 DML</td><td>sql: str</td><td>None</td></tr><tr><td>execute_query_statement</td><td>执行查询 SQL 语句并返回结果集</td><td>sql: str</td><td>SessionDataSet</td></tr><tr><td>close</td><td>关闭会话并释放资源</td><td>None</td><td>None</td></tr></tbody></table><p>自 V2.0.8 版本起，SessionDataSet 提供分批获取 DataFrame 的方法，用于高效处理大数据量查询：</p><div class="language-python line-numbers-mode" data-highlighter="shiki" data-ext="python" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-python"><span class="line"><span style="color:#7F848E;font-style:italic;"># 分批获取 DataFrame</span></span>
 <span class="line"><span style="color:#ABB2BF;">has_next </span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;"> result.</span><span style="color:#61AFEF;">has_next_df</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"><span style="color:#C678DD;">if</span><span style="color:#ABB2BF;"> has_next:</span></span>
 <span class="line"><span style="color:#ABB2BF;">    df </span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;"> result.</span><span style="color:#61AFEF;">next_df</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">    # 处理 DataFrame</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>方法说明：</strong></p><ul><li><code>has_next_df()</code>: 返回 <code>True</code>/<code>False</code>，表示是否还有数据可返回</li><li><code>next_df()</code>: 返回 <code>DataFrame</code> 或 <code>None</code>，每次返回 <code>fetchSize</code> 行（默认5000行，由 Session 的 <code>fetch_size</code> 参数控制） <ul><li>剩余数据 ≥ <code>fetchSize</code> 时，返回 <code>fetchSize</code> 行</li><li>剩余数据 &lt; <code>fetchSize</code> 时，返回剩余所有行</li><li>数据遍历完毕时，返回 <code>None</code></li></ul></li><li>初始化 Session 时检查 <code>fetchSize</code>，若 ≤0 则重置为 5000 并打印警告日志</li></ul><p><strong>注意：</strong> 不要混合使用不同的遍历方式，如（todf函数与 next_df 混用），否则会出现预期外的错误。</p><h4 id="_2-1-3-接口展示" tabindex="-1"><a class="header-anchor" href="#_2-1-3-接口展示"><span>2.1.3 接口展示</span></a></h4><p><strong>TableSession:</strong></p><div class="language-python line-numbers-mode" data-highlighter="shiki" data-ext="python" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-python"><span class="line"><span style="color:#C678DD;">class</span><span style="color:#E5C07B;"> TableSession</span><span style="color:#ABB2BF;">(</span><span style="color:#56B6C2;">object</span><span style="color:#ABB2BF;">):</span></span>
 <span class="line"><span style="color:#C678DD;">def</span><span style="color:#61AFEF;"> insert</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;font-style:italic;">self</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;font-style:italic;">tablet</span><span style="color:#ABB2BF;">: Union[Tablet, NumpyTablet]):</span></span>
 <span class="line"><span style="color:#98C379;">    &quot;&quot;&quot;</span></span>
 <span class="line"><span style="color:#98C379;">    Insert data into the database.</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#98C379;">    Parameters:</span></span>
 <span class="line"><span style="color:#98C379;">        tablet (Tablet | NumpyTablet): The tablet containing the data to be inserted.</span></span>
 <span class="line"><span style="color:#98C379;">                                       Accepts either a `Tablet` or `NumpyTablet`.</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#98C379;">    Raises:</span></span>
 <span class="line"><span style="color:#98C379;">        IoTDBConnectionException: If there is an issue with the database connection.</span></span>
 <span class="line"><span style="color:#98C379;">    &quot;&quot;&quot;</span></span>
 <span class="line"><span style="color:#C678DD;">    pass</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">def</span><span style="color:#61AFEF;"> execute_non_query_statement</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;font-style:italic;">self</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;font-style:italic;">sql</span><span style="color:#ABB2BF;">: </span><span style="color:#56B6C2;">str</span><span style="color:#ABB2BF;">):</span></span>
 <span class="line"><span style="color:#98C379;">    &quot;&quot;&quot;</span></span>
 <span class="line"><span style="color:#98C379;">    Execute a non-query SQL statement.</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#98C379;">    Parameters:</span></span>
 <span class="line"><span style="color:#98C379;">        sql (str): The SQL statement to execute. Typically used for commands</span></span>
 <span class="line"><span style="color:#98C379;">                   such as INSERT, DELETE, or UPDATE.</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#98C379;">    Raises:</span></span>
 <span class="line"><span style="color:#98C379;">        IoTDBConnectionException: If there is an issue with the database connection.</span></span>
 <span class="line"><span style="color:#98C379;">    &quot;&quot;&quot;</span></span>
 <span class="line"><span style="color:#C678DD;">    pass</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">def</span><span style="color:#61AFEF;"> execute_query_statement</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;font-style:italic;">self</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;font-style:italic;">sql</span><span style="color:#ABB2BF;">: </span><span style="color:#56B6C2;">str</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;font-style:italic;">timeout_in_ms</span><span style="color:#ABB2BF;">: </span><span style="color:#56B6C2;">int</span><span style="color:#56B6C2;"> =</span><span style="color:#D19A66;"> 0</span><span style="color:#ABB2BF;">) -&gt; </span><span style="color:#98C379;">&quot;SessionDataSet&quot;</span><span style="color:#ABB2BF;">:</span></span>
 <span class="line"><span style="color:#98C379;">    &quot;&quot;&quot;</span></span>
 <span class="line"><span style="color:#98C379;">    Execute a query SQL statement and return the result set.</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#98C379;">    Parameters:</span></span>
 <span class="line"><span style="color:#98C379;">        sql (str): The SQL query to execute.</span></span>
 <span class="line"><span style="color:#98C379;">        timeout_in_ms (int, optional): Timeout for the query in milliseconds. Defaults to 0,</span></span>
 <span class="line"><span style="color:#98C379;">                                       which means no timeout.</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#98C379;">    Returns:</span></span>
 <span class="line"><span style="color:#98C379;">        SessionDataSet: The result set of the query.</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#98C379;">    Raises:</span></span>
 <span class="line"><span style="color:#98C379;">        IoTDBConnectionException: If there is an issue with the database connection.</span></span>
 <span class="line"><span style="color:#98C379;">    &quot;&quot;&quot;</span></span>
 <span class="line"><span style="color:#C678DD;">    pass</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">def</span><span style="color:#61AFEF;"> close</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;font-style:italic;">self</span><span style="color:#ABB2BF;">):</span></span>
 <span class="line"><span style="color:#98C379;">    &quot;&quot;&quot;</span></span>
 <span class="line"><span style="color:#98C379;">    Close the session and release resources.</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#98C379;">    Raises:</span></span>
 <span class="line"><span style="color:#98C379;">        IoTDBConnectionException: If there is an issue closing the connection.</span></span>
 <span class="line"><span style="color:#98C379;">    &quot;&quot;&quot;</span></span>
 <span class="line"><span style="color:#C678DD;">    pass</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="_2-2-tablesessionconfig" tabindex="-1"><a class="header-anchor" href="#_2-2-tablesessionconfig"><span>2.2 TableSessionConfig</span></a></h3><h4 id="_2-2-1-功能描述" tabindex="-1"><a class="header-anchor" href="#_2-2-1-功能描述"><span>2.2.1 功能描述</span></a></h4><p>TableSessionConfig是一个配置类，用于设置和创建TableSession 实例。它定义了连接到IoTDB数据库所需的各种参数。</p><h4 id="_2-2-2-配置选项" tabindex="-1"><a class="header-anchor" href="#_2-2-2-配置选项"><span>2.2.2 配置选项</span></a></h4><table><thead><tr><th><strong>配置项</strong></th><th><strong>描述</strong></th><th><strong>类型</strong></th><th><strong>默认值</strong></th></tr></thead><tbody><tr><td>node_urls</td><td>数据库连接的节点 URL 列表</td><td>list</td><td>[&quot;localhost:6667&quot;]</td></tr><tr><td>username</td><td>数据库连接用户名</td><td>str</td><td>&quot;root&quot;</td></tr><tr><td>password</td><td>数据库连接密码</td><td>str</td><td>&quot;root&quot;</td></tr><tr><td>database</td><td>要连接的目标数据库</td><td>str</td><td>None</td></tr><tr><td>fetch_size</td><td>每次查询获取的行数</td><td>int</td><td>5000</td></tr><tr><td>time_zone</td><td>会话的默认时区</td><td>str</td><td>Session.DEFAULT_ZONE_ID</td></tr><tr><td>enable_compression</td><td>是否启用数据压缩</td><td>bool</td><td>False</td></tr></tbody></table><h4 id="_2-2-3-接口展示" tabindex="-1"><a class="header-anchor" href="#_2-2-3-接口展示"><span>2.2.3 接口展示</span></a></h4><div class="language-python line-numbers-mode" data-highlighter="shiki" data-ext="python" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-python"><span class="line"><span style="color:#C678DD;">class</span><span style="color:#E5C07B;"> TableSessionConfig</span><span style="color:#ABB2BF;">(</span><span style="color:#56B6C2;">object</span><span style="color:#ABB2BF;">):</span></span>
 <span class="line"><span style="color:#98C379;">    &quot;&quot;&quot;</span></span>
 <span class="line"><span style="color:#98C379;">    Configuration class for a TableSession. </span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#98C379;">    This class defines various parameters for connecting to and interacting </span></span>
 <span class="line"><span style="color:#98C379;">    with the IoTDB tables.</span></span>
 <span class="line"><span style="color:#98C379;">    &quot;&quot;&quot;</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">    def</span><span style="color:#56B6C2;"> __init__</span><span style="color:#ABB2BF;">(</span></span>
 <span class="line"><span style="color:#E5C07B;font-style:italic;">        self</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#D19A66;font-style:italic;">        node_urls</span><span style="color:#ABB2BF;">: </span><span style="color:#56B6C2;">list</span><span style="color:#56B6C2;"> =</span><span style="color:#D19A66;"> None</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#D19A66;font-style:italic;">        username</span><span style="color:#ABB2BF;">: </span><span style="color:#56B6C2;">str</span><span style="color:#56B6C2;"> =</span><span style="color:#ABB2BF;"> Session.</span><span style="color:#D19A66;">DEFAULT_USER</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#D19A66;font-style:italic;">        password</span><span style="color:#ABB2BF;">: </span><span style="color:#56B6C2;">str</span><span style="color:#56B6C2;"> =</span><span style="color:#ABB2BF;"> Session.</span><span style="color:#D19A66;">DEFAULT_PASSWORD</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#D19A66;font-style:italic;">        database</span><span style="color:#ABB2BF;">: </span><span style="color:#56B6C2;">str</span><span style="color:#56B6C2;"> =</span><span style="color:#D19A66;"> None</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#D19A66;font-style:italic;">        fetch_size</span><span style="color:#ABB2BF;">: </span><span style="color:#56B6C2;">int</span><span style="color:#56B6C2;"> =</span><span style="color:#D19A66;"> 5000</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#D19A66;font-style:italic;">        time_zone</span><span style="color:#ABB2BF;">: </span><span style="color:#56B6C2;">str</span><span style="color:#56B6C2;"> =</span><span style="color:#ABB2BF;"> Session.</span><span style="color:#D19A66;">DEFAULT_ZONE_ID</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#D19A66;font-style:italic;">        enable_compression</span><span style="color:#ABB2BF;">: </span><span style="color:#56B6C2;">bool</span><span style="color:#56B6C2;"> =</span><span style="color:#D19A66;"> False</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#ABB2BF;">    ):</span></span>
 <span class="line"><span style="color:#98C379;">        &quot;&quot;&quot;</span></span>
 <span class="line"><span style="color:#98C379;">        Initialize a TableSessionConfig object with the provided parameters.</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#98C379;">        Parameters:</span></span>
 <span class="line"><span style="color:#98C379;">            node_urls (list, optional): A list of node URLs for the database connection.</span></span>
 <span class="line"><span style="color:#98C379;">                                        Defaults to [&quot;localhost:6667&quot;].</span></span>
 <span class="line"><span style="color:#98C379;">            username (str, optional): The username for the database connection. </span></span>
 <span class="line"><span style="color:#98C379;">                                      Defaults to &quot;root&quot;.</span></span>
 <span class="line"><span style="color:#98C379;">            password (str, optional): The password for the database connection. </span></span>
 <span class="line"><span style="color:#98C379;">                                      Defaults to &quot;root&quot;.</span></span>
 <span class="line"><span style="color:#98C379;">            database (str, optional): The target database to connect to. Defaults to None.</span></span>
 <span class="line"><span style="color:#98C379;">            fetch_size (int, optional): The number of rows to fetch per query. Defaults to 5000.</span></span>
 <span class="line"><span style="color:#98C379;">            time_zone (str, optional): The default time zone for the session. </span></span>
 <span class="line"><span style="color:#98C379;">                                       Defaults to Session.DEFAULT_ZONE_ID.</span></span>
 <span class="line"><span style="color:#98C379;">            enable_compression (bool, optional): Whether to enable data compression. </span></span>
 <span class="line"><span style="color:#98C379;">                                                 Defaults to False.</span></span>
 <span class="line"><span style="color:#98C379;">        &quot;&quot;&quot;</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>注意事项:</strong></p><p>在使用完 TableSession 后，务必调用 close 方法来释放资源。</p><h2 id="_3-客户端连接池" tabindex="-1"><a class="header-anchor" href="#_3-客户端连接池"><span>3. 客户端连接池</span></a></h2><h3 id="_3-1-tablesessionpool" tabindex="-1"><a class="header-anchor" href="#_3-1-tablesessionpool"><span>3.1 TableSessionPool</span></a></h3><h4 id="_3-1-1-功能描述" tabindex="-1"><a class="header-anchor" href="#_3-1-1-功能描述"><span>3.1.1 功能描述</span></a></h4><p>TableSessionPool 是一个会话池管理类，用于管理 TableSession 实例的创建和销毁。它提供了从池中获取会话和关闭会话池的功能。</p><h4 id="_3-1-2-方法列表" tabindex="-1"><a class="header-anchor" href="#_3-1-2-方法列表"><span>3.1.2 方法列表</span></a></h4><table><thead><tr><th><strong>方法名称</strong></th><th><strong>描述</strong></th><th><strong>返回类型</strong></th><th><strong>异常</strong></th></tr></thead><tbody><tr><td>get_session</td><td>从会话池中检索一个新的 TableSession 实例</td><td>TableSession</td><td>无</td></tr><tr><td>close</td><td>关闭会话池并释放所有资源</td><td>None</td><td>无</td></tr></tbody></table><h4 id="_3-1-3-接口展示" tabindex="-1"><a class="header-anchor" href="#_3-1-3-接口展示"><span>3.1.3 接口展示</span></a></h4><p><strong>TableSessionPool:</strong></p><div class="language-python line-numbers-mode" data-highlighter="shiki" data-ext="python" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-python"><span class="line"><span style="color:#C678DD;">def</span><span style="color:#61AFEF;"> get_session</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;font-style:italic;">self</span><span style="color:#ABB2BF;">) -&gt; TableSession:</span></span>
 <span class="line"><span style="color:#98C379;">    &quot;&quot;&quot;</span></span>
 <span class="line"><span style="color:#98C379;">    Retrieve a new TableSession instance.</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#98C379;">    Returns:</span></span>
 <span class="line"><span style="color:#98C379;">        TableSession: A new session object configured with the session pool.</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#98C379;">    Notes:</span></span>
 <span class="line"><span style="color:#98C379;">        The session is initialized with the underlying session pool for managing</span></span>
 <span class="line"><span style="color:#98C379;">        connections. Ensure proper usage of the session&#39;s lifecycle.</span></span>
 <span class="line"><span style="color:#98C379;">    &quot;&quot;&quot;</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">def</span><span style="color:#61AFEF;"> close</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;font-style:italic;">self</span><span style="color:#ABB2BF;">):</span></span>
 <span class="line"><span style="color:#98C379;">    &quot;&quot;&quot;</span></span>
 <span class="line"><span style="color:#98C379;">    Close the session pool and release all resources.</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#98C379;">    This method closes the underlying session pool, ensuring that all</span></span>
 <span class="line"><span style="color:#98C379;">    resources associated with it are properly released.</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#98C379;">    Notes:</span></span>
 <span class="line"><span style="color:#98C379;">        After calling this method, the session pool cannot be used to retrieve</span></span>
 <span class="line"><span style="color:#98C379;">        new sessions, and any attempt to do so may raise an exception.</span></span>
 <span class="line"><span style="color:#98C379;">    &quot;&quot;&quot;</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="_3-2-tablesessionpoolconfig" tabindex="-1"><a class="header-anchor" href="#_3-2-tablesessionpoolconfig"><span>3.2 TableSessionPoolConfig</span></a></h3><h4 id="_3-2-1-功能描述" tabindex="-1"><a class="header-anchor" href="#_3-2-1-功能描述"><span>3.2.1 功能描述</span></a></h4><p>TableSessionPoolConfig是一个配置类，用于设置和创建 TableSessionPool 实例。它定义了初始化和管理 IoTDB 数据库会话池所需的参数。</p><h4 id="_3-2-2-配置选项" tabindex="-1"><a class="header-anchor" href="#_3-2-2-配置选项"><span>3.2.2 配置选项</span></a></h4><table><thead><tr><th><strong>配置项</strong></th><th><strong>描述</strong></th><th><strong>类型</strong></th><th><strong>默认值</strong></th></tr></thead><tbody><tr><td>node_urls</td><td>数据库连接的节点 URL 列表</td><td>list</td><td>None</td></tr><tr><td>max_pool_size</td><td>会话池中的最大会话数</td><td>int</td><td>5</td></tr><tr><td>username</td><td>数据库连接用户名</td><td>str</td><td>Session.DEFAULT_USER</td></tr><tr><td>password</td><td>数据库连接密码</td><td>str</td><td>Session.DEFAULT_PASSWORD</td></tr><tr><td>database</td><td>要连接的目标数据库</td><td>str</td><td>None</td></tr><tr><td>fetch_size</td><td>每次查询获取的行数</td><td>int</td><td>5000</td></tr><tr><td>time_zone</td><td>会话池的默认时区</td><td>str</td><td>Session.DEFAULT_ZONE_ID</td></tr><tr><td>enable_redirection</td><td>是否启用重定向</td><td>bool</td><td>False</td></tr><tr><td>enable_compression</td><td>是否启用数据压缩</td><td>bool</td><td>False</td></tr><tr><td>wait_timeout_in_ms</td><td>等待会话可用的最大时间（毫秒）</td><td>int</td><td>10000</td></tr><tr><td>max_retry</td><td>操作的最大重试次数</td><td>int</td><td>3</td></tr></tbody></table><h4 id="_3-2-3-接口展示" tabindex="-1"><a class="header-anchor" href="#_3-2-3-接口展示"><span>3.2.3 接口展示</span></a></h4><div class="language-python line-numbers-mode" data-highlighter="shiki" data-ext="python" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-python"><span class="line"><span style="color:#C678DD;">class</span><span style="color:#E5C07B;"> TableSessionPoolConfig</span><span style="color:#ABB2BF;">(</span><span style="color:#56B6C2;">object</span><span style="color:#ABB2BF;">):</span></span>
 <span class="line"><span style="color:#98C379;">    &quot;&quot;&quot;</span></span>
 <span class="line"><span style="color:#98C379;">    Configuration class for a TableSessionPool.</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#98C379;">    This class defines the parameters required to initialize and manage</span></span>
 <span class="line"><span style="color:#98C379;">    a session pool for interacting with the IoTDB database.</span></span>
 <span class="line"><span style="color:#98C379;">    &quot;&quot;&quot;</span></span>
 <span class="line"><span style="color:#C678DD;">    def</span><span style="color:#56B6C2;"> __init__</span><span style="color:#ABB2BF;">(</span></span>
 <span class="line"><span style="color:#E5C07B;font-style:italic;">        self</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#D19A66;font-style:italic;">        node_urls</span><span style="color:#ABB2BF;">: </span><span style="color:#56B6C2;">list</span><span style="color:#56B6C2;"> =</span><span style="color:#D19A66;"> None</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#D19A66;font-style:italic;">        max_pool_size</span><span style="color:#ABB2BF;">: </span><span style="color:#56B6C2;">int</span><span style="color:#56B6C2;"> =</span><span style="color:#D19A66;"> 5</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#D19A66;font-style:italic;">        username</span><span style="color:#ABB2BF;">: </span><span style="color:#56B6C2;">str</span><span style="color:#56B6C2;"> =</span><span style="color:#ABB2BF;"> Session.</span><span style="color:#D19A66;">DEFAULT_USER</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#D19A66;font-style:italic;">        password</span><span style="color:#ABB2BF;">: </span><span style="color:#56B6C2;">str</span><span style="color:#56B6C2;"> =</span><span style="color:#ABB2BF;"> Session.</span><span style="color:#D19A66;">DEFAULT_PASSWORD</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#D19A66;font-style:italic;">        database</span><span style="color:#ABB2BF;">: </span><span style="color:#56B6C2;">str</span><span style="color:#56B6C2;"> =</span><span style="color:#D19A66;"> None</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#D19A66;font-style:italic;">        fetch_size</span><span style="color:#ABB2BF;">: </span><span style="color:#56B6C2;">int</span><span style="color:#56B6C2;"> =</span><span style="color:#D19A66;"> 5000</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#D19A66;font-style:italic;">        time_zone</span><span style="color:#ABB2BF;">: </span><span style="color:#56B6C2;">str</span><span style="color:#56B6C2;"> =</span><span style="color:#ABB2BF;"> Session.</span><span style="color:#D19A66;">DEFAULT_ZONE_ID</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#D19A66;font-style:italic;">        enable_redirection</span><span style="color:#ABB2BF;">: </span><span style="color:#56B6C2;">bool</span><span style="color:#56B6C2;"> =</span><span style="color:#D19A66;"> False</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#D19A66;font-style:italic;">        enable_compression</span><span style="color:#ABB2BF;">: </span><span style="color:#56B6C2;">bool</span><span style="color:#56B6C2;"> =</span><span style="color:#D19A66;"> False</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#D19A66;font-style:italic;">        wait_timeout_in_ms</span><span style="color:#ABB2BF;">: </span><span style="color:#56B6C2;">int</span><span style="color:#56B6C2;"> =</span><span style="color:#D19A66;"> 10000</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#D19A66;font-style:italic;">        max_retry</span><span style="color:#ABB2BF;">: </span><span style="color:#56B6C2;">int</span><span style="color:#56B6C2;"> =</span><span style="color:#D19A66;"> 3</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#ABB2BF;">    ):</span></span>
 <span class="line"><span style="color:#98C379;">    &quot;&quot;&quot;</span></span>
 <span class="line"><span style="color:#98C379;">    Initialize a TableSessionPoolConfig object with the provided parameters.</span></span>
 <span class="line"><span style="color:#98C379;">    </span></span>
 <span class="line"><span style="color:#98C379;">    Parameters:</span></span>
 <span class="line"><span style="color:#98C379;">        node_urls (list, optional): A list of node URLs for the database connection.</span></span>
 <span class="line"><span style="color:#98C379;">                                    Defaults to None.</span></span>
 <span class="line"><span style="color:#98C379;">        max_pool_size (int, optional): The maximum number of sessions in the pool.</span></span>
 <span class="line"><span style="color:#98C379;">                                       Defaults to 5.</span></span>
 <span class="line"><span style="color:#98C379;">        username (str, optional): The username for the database connection.</span></span>
 <span class="line"><span style="color:#98C379;">                                  Defaults to Session.DEFAULT_USER.</span></span>
 <span class="line"><span style="color:#98C379;">        password (str, optional): The password for the database connection.</span></span>
 <span class="line"><span style="color:#98C379;">                                  Defaults to Session.DEFAULT_PASSWORD.</span></span>
 <span class="line"><span style="color:#98C379;">        database (str, optional): The target database to connect to. Defaults to None.</span></span>
 <span class="line"><span style="color:#98C379;">        fetch_size (int, optional): The number of rows to fetch per query. Defaults to 5000.</span></span>
 <span class="line"><span style="color:#98C379;">        time_zone (str, optional): The default time zone for the session pool.</span></span>
 <span class="line"><span style="color:#98C379;">                                   Defaults to Session.DEFAULT_ZONE_ID.</span></span>
 <span class="line"><span style="color:#98C379;">        enable_redirection (bool, optional): Whether to enable redirection.</span></span>
 <span class="line"><span style="color:#98C379;">                                             Defaults to False.</span></span>
 <span class="line"><span style="color:#98C379;">        enable_compression (bool, optional): Whether to enable data compression.</span></span>
 <span class="line"><span style="color:#98C379;">                                             Defaults to False.</span></span>
 <span class="line"><span style="color:#98C379;">        wait_timeout_in_ms (int, optional): The maximum time (in milliseconds) to wait for a session</span></span>
 <span class="line"><span style="color:#98C379;">                                            to become available. Defaults to 10000.</span></span>
 <span class="line"><span style="color:#98C379;">        max_retry (int, optional): The maximum number of retry attempts for operations. Defaults to 3.</span></span>
 <span class="line"><span style="color:#98C379;">    </span></span>
 <span class="line"><span style="color:#98C379;">    &quot;&quot;&quot;</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="_3-3-ssl-连接" tabindex="-1"><a class="header-anchor" href="#_3-3-ssl-连接"><span>3.3 SSL 连接</span></a></h3><h4 id="_3-3-1-服务器端配置证书" tabindex="-1"><a class="header-anchor" href="#_3-3-1-服务器端配置证书"><span>3.3.1 服务器端配置证书</span></a></h4><p><code>conf/iotdb-system.properties</code> 配置文件中查找或添加以下配置项：</p><div class="language- line-numbers-mode" data-highlighter="shiki" data-ext="" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-"><span class="line"><span>enable_thrift_ssl=true</span></span>
 <span class="line"><span>key_store_path=/path/to/your/server_keystore.jks</span></span>
 <span class="line"><span>key_store_pwd=your_keystore_password</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="_3-3-2-配置-python-客户端证书" tabindex="-1"><a class="header-anchor" href="#_3-3-2-配置-python-客户端证书"><span>3.3.2 配置 python 客户端证书</span></a></h4><ul><li>设置 use_ssl 为 True 以启用 SSL。</li><li>指定客户端证书路径，使用 ca_certs 参数。</li></ul><div class="language- line-numbers-mode" data-highlighter="shiki" data-ext="" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-"><span class="line"><span>use_ssl = True</span></span>
 <span class="line"><span>ca_certs = &quot;/path/to/your/server.crt&quot;  # 或 ca_certs = &quot;/path/to/your//ca_cert.pem&quot;</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>示例代码：使用 SSL 连接 IoTDB</strong></p><div class="language-python line-numbers-mode" data-highlighter="shiki" data-ext="python" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-python"><span class="line"><span style="color:#7F848E;font-style:italic;"># Licensed to the Apache Software Foundation (ASF) under one</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># or more contributor license agreements.  See the NOTICE file</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># distributed with this work for additional information</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># regarding copyright ownership.  The ASF licenses this file</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># to you under the Apache License, Version 2.0 (the</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># &quot;License&quot;); you may not use this file except in compliance</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># with the License.  You may obtain a copy of the License at</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">#</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">#     http://www.apache.org/licenses/LICENSE-2.0</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">#</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># Unless required by applicable law or agreed to in writing,</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># software distributed under the License is distributed on an</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># &quot;AS IS&quot; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># KIND, either express or implied.  See the License for the</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># specific language governing permissions and limitations</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># under the License.</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">#</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">from</span><span style="color:#ABB2BF;"> iotdb.SessionPool </span><span style="color:#C678DD;">import</span><span style="color:#ABB2BF;"> PoolConfig, SessionPool</span></span>
 <span class="line"><span style="color:#C678DD;">from</span><span style="color:#ABB2BF;"> iotdb.Session </span><span style="color:#C678DD;">import</span><span style="color:#ABB2BF;"> Session</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#ABB2BF;">ip </span><span style="color:#56B6C2;">=</span><span style="color:#98C379;"> &quot;127.0.0.1&quot;</span></span>
 <span class="line"><span style="color:#ABB2BF;">port_ </span><span style="color:#56B6C2;">=</span><span style="color:#98C379;"> &quot;6667&quot;</span></span>
 <span class="line"><span style="color:#ABB2BF;">username_ </span><span style="color:#56B6C2;">=</span><span style="color:#98C379;"> &quot;root&quot;</span></span>
 <span class="line"><span style="color:#ABB2BF;">password_ </span><span style="color:#56B6C2;">=</span><span style="color:#98C379;"> &quot;root&quot;</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># Configure SSL enabled</span></span>
 <span class="line"><span style="color:#ABB2BF;">use_ssl </span><span style="color:#56B6C2;">=</span><span style="color:#D19A66;"> True</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># Configure certificate path</span></span>
 <span class="line"><span style="color:#ABB2BF;">ca_certs </span><span style="color:#56B6C2;">=</span><span style="color:#98C379;"> &quot;/path/server.crt&quot;</span></span>
 <span class="line"></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">def</span><span style="color:#61AFEF;"> get_data</span><span style="color:#ABB2BF;">():</span></span>
 <span class="line"><span style="color:#ABB2BF;">    session </span><span style="color:#56B6C2;">=</span><span style="color:#61AFEF;"> Session</span><span style="color:#ABB2BF;">(</span></span>
 <span class="line"><span style="color:#ABB2BF;">        ip, port_, username_, password_, </span><span style="color:#E06C75;font-style:italic;">use_ssl</span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;">use_ssl, </span><span style="color:#E06C75;font-style:italic;">ca_certs</span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;">ca_certs</span></span>
 <span class="line"><span style="color:#ABB2BF;">    )</span></span>
 <span class="line"><span style="color:#ABB2BF;">    session.</span><span style="color:#61AFEF;">open</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">False</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#C678DD;">    with</span><span style="color:#ABB2BF;"> session.</span><span style="color:#61AFEF;">execute_query_statement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;SHOW DATABASES&quot;</span><span style="color:#ABB2BF;">) </span><span style="color:#C678DD;">as</span><span style="color:#ABB2BF;"> session_data_set:</span></span>
 <span class="line"><span style="color:#56B6C2;">        print</span><span style="color:#ABB2BF;">(session_data_set.</span><span style="color:#61AFEF;">get_column_names</span><span style="color:#ABB2BF;">())</span></span>
 <span class="line"><span style="color:#C678DD;">        while</span><span style="color:#ABB2BF;"> session_data_set.</span><span style="color:#61AFEF;">has_next</span><span style="color:#ABB2BF;">():</span></span>
 <span class="line"><span style="color:#56B6C2;">            print</span><span style="color:#ABB2BF;">(session_data_set.</span><span style="color:#61AFEF;">next</span><span style="color:#ABB2BF;">())</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#ABB2BF;">    session.</span><span style="color:#61AFEF;">close</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">def</span><span style="color:#61AFEF;"> get_data2</span><span style="color:#ABB2BF;">():</span></span>
 <span class="line"><span style="color:#ABB2BF;">    pool_config </span><span style="color:#56B6C2;">=</span><span style="color:#61AFEF;"> PoolConfig</span><span style="color:#ABB2BF;">(</span></span>
 <span class="line"><span style="color:#E06C75;font-style:italic;">        host</span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;">ip,</span></span>
 <span class="line"><span style="color:#E06C75;font-style:italic;">        port</span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;">port_,</span></span>
 <span class="line"><span style="color:#E06C75;font-style:italic;">        user_name</span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;">username_,</span></span>
 <span class="line"><span style="color:#E06C75;font-style:italic;">        password</span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;">password_,</span></span>
 <span class="line"><span style="color:#E06C75;font-style:italic;">        fetch_size</span><span style="color:#56B6C2;">=</span><span style="color:#D19A66;">1024</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#E06C75;font-style:italic;">        time_zone</span><span style="color:#56B6C2;">=</span><span style="color:#98C379;">&quot;UTC+8&quot;</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#E06C75;font-style:italic;">        max_retry</span><span style="color:#56B6C2;">=</span><span style="color:#D19A66;">3</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#E06C75;font-style:italic;">        use_ssl</span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;">use_ssl,</span></span>
 <span class="line"><span style="color:#E06C75;font-style:italic;">        ca_certs</span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;">ca_certs,</span></span>
 <span class="line"><span style="color:#ABB2BF;">    )</span></span>
 <span class="line"><span style="color:#ABB2BF;">    max_pool_size </span><span style="color:#56B6C2;">=</span><span style="color:#D19A66;"> 5</span></span>
 <span class="line"><span style="color:#ABB2BF;">    wait_timeout_in_ms </span><span style="color:#56B6C2;">=</span><span style="color:#D19A66;"> 3000</span></span>
 <span class="line"><span style="color:#ABB2BF;">    session_pool </span><span style="color:#56B6C2;">=</span><span style="color:#61AFEF;"> SessionPool</span><span style="color:#ABB2BF;">(pool_config, max_pool_size, wait_timeout_in_ms)</span></span>
 <span class="line"><span style="color:#ABB2BF;">    session </span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;"> session_pool.</span><span style="color:#61AFEF;">get_session</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"><span style="color:#C678DD;">    with</span><span style="color:#ABB2BF;"> session.</span><span style="color:#61AFEF;">execute_query_statement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;SHOW DATABASES&quot;</span><span style="color:#ABB2BF;">) </span><span style="color:#C678DD;">as</span><span style="color:#ABB2BF;"> session_data_set:</span></span>
 <span class="line"><span style="color:#56B6C2;">        print</span><span style="color:#ABB2BF;">(session_data_set.</span><span style="color:#61AFEF;">get_column_names</span><span style="color:#ABB2BF;">())</span></span>
 <span class="line"><span style="color:#C678DD;">        while</span><span style="color:#ABB2BF;"> session_data_set.</span><span style="color:#61AFEF;">has_next</span><span style="color:#ABB2BF;">():</span></span>
 <span class="line"><span style="color:#56B6C2;">            print</span><span style="color:#ABB2BF;">(session_data_set.</span><span style="color:#61AFEF;">next</span><span style="color:#ABB2BF;">())</span></span>
 <span class="line"><span style="color:#ABB2BF;">    session_pool.</span><span style="color:#61AFEF;">put_back</span><span style="color:#ABB2BF;">(session)</span></span>
 <span class="line"><span style="color:#ABB2BF;">    session_pool.</span><span style="color:#61AFEF;">close</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">if</span><span style="color:#E06C75;"> __name__</span><span style="color:#56B6C2;"> ==</span><span style="color:#98C379;"> &quot;__main__&quot;</span><span style="color:#ABB2BF;">:</span></span>
 <span class="line"><span style="color:#ABB2BF;">    df </span><span style="color:#56B6C2;">=</span><span style="color:#61AFEF;"> get_data</span><span style="color:#ABB2BF;">()</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="_4-示例代码" tabindex="-1"><a class="header-anchor" href="#_4-示例代码"><span>4. 示例代码</span></a></h2><p>Session示例代码:<a href="https://github.com/apache/iotdb/blob/master/iotdb-client/client-py/table_model_session_example.py" target="_blank" rel="noopener noreferrer">Session Example</a></p><p>SessionPool示例代码:<a href="https://github.com/apache/iotdb/blob/master/otdb-client/client-py/table_model_session_pool_example.py" target="_blank" rel="noopener noreferrer">SessionPool Example</a></p><div class="language-python line-numbers-mode" data-highlighter="shiki" data-ext="python" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-python"><span class="line"><span style="color:#7F848E;font-style:italic;"># Licensed to the Apache Software Foundation (ASF) under one</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># or more contributor license agreements.  See the NOTICE file</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># distributed with this work for additional information</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># regarding copyright ownership.  The ASF licenses this file</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># to you under the Apache License, Version 2.0 (the</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># &quot;License&quot;); you may not use this file except in compliance</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># with the License.  You may obtain a copy of the License at</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">#</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">#     http://www.apache.org/licenses/LICENSE-2.0</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">#</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># Unless required by applicable law or agreed to in writing,</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># software distributed under the License is distributed on an</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># &quot;AS IS&quot; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># KIND, either express or implied.  See the License for the</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># specific language governing permissions and limitations</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># under the License.</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">#</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#ABB2BF;"> threading</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#ABB2BF;"> numpy </span><span style="color:#C678DD;">as</span><span style="color:#ABB2BF;"> np</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">from</span><span style="color:#ABB2BF;"> iotdb.table_session_pool </span><span style="color:#C678DD;">import</span><span style="color:#ABB2BF;"> TableSessionPool, TableSessionPoolConfig</span></span>
 <span class="line"><span style="color:#C678DD;">from</span><span style="color:#ABB2BF;"> iotdb.utils.IoTDBConstants </span><span style="color:#C678DD;">import</span><span style="color:#ABB2BF;"> TSDataType</span></span>
 <span class="line"><span style="color:#C678DD;">from</span><span style="color:#ABB2BF;"> iotdb.utils.NumpyTablet </span><span style="color:#C678DD;">import</span><span style="color:#ABB2BF;"> NumpyTablet</span></span>
 <span class="line"><span style="color:#C678DD;">from</span><span style="color:#ABB2BF;"> iotdb.utils.Tablet </span><span style="color:#C678DD;">import</span><span style="color:#ABB2BF;"> ColumnType, Tablet</span></span>
 <span class="line"></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">def</span><span style="color:#61AFEF;"> prepare_data</span><span style="color:#ABB2BF;">():</span></span>
 <span class="line"><span style="color:#56B6C2;">    print</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;create database&quot;</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">    # Get a session from the pool</span></span>
 <span class="line"><span style="color:#ABB2BF;">    session </span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;"> session_pool.</span><span style="color:#61AFEF;">get_session</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"><span style="color:#ABB2BF;">    session.</span><span style="color:#61AFEF;">execute_non_query_statement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;CREATE DATABASE IF NOT EXISTS db1&quot;</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#ABB2BF;">    session.</span><span style="color:#61AFEF;">execute_non_query_statement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&#39;USE &quot;db1&quot;&#39;</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#ABB2BF;">    session.</span><span style="color:#61AFEF;">execute_non_query_statement</span><span style="color:#ABB2BF;">(</span></span>
 <span class="line"><span style="color:#98C379;">        &quot;CREATE TABLE table0 (id1 string tag, attr1 string attribute, &quot;</span></span>
 <span class="line"><span style="color:#56B6C2;">        +</span><span style="color:#98C379;"> &quot;m1 double &quot;</span></span>
 <span class="line"><span style="color:#56B6C2;">        +</span><span style="color:#98C379;"> &quot;field)&quot;</span></span>
 <span class="line"><span style="color:#ABB2BF;">    )</span></span>
 <span class="line"><span style="color:#ABB2BF;">    session.</span><span style="color:#61AFEF;">execute_non_query_statement</span><span style="color:#ABB2BF;">(</span></span>
 <span class="line"><span style="color:#98C379;">        &quot;CREATE TABLE table1 (id1 string tag, attr1 string attribute, &quot;</span></span>
 <span class="line"><span style="color:#56B6C2;">        +</span><span style="color:#98C379;"> &quot;m1 double &quot;</span></span>
 <span class="line"><span style="color:#56B6C2;">        +</span><span style="color:#98C379;"> &quot;field)&quot;</span></span>
 <span class="line"><span style="color:#ABB2BF;">    )</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#56B6C2;">    print</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;now the tables are:&quot;</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">    # show result</span></span>
 <span class="line"><span style="color:#C678DD;">    with</span><span style="color:#ABB2BF;"> session.</span><span style="color:#61AFEF;">execute_query_statement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;SHOW TABLES&quot;</span><span style="color:#ABB2BF;">) </span><span style="color:#C678DD;">as</span><span style="color:#ABB2BF;"> res:</span></span>
 <span class="line"><span style="color:#C678DD;">        while</span><span style="color:#ABB2BF;"> res.</span><span style="color:#61AFEF;">has_next</span><span style="color:#ABB2BF;">():</span></span>
 <span class="line"><span style="color:#56B6C2;">            print</span><span style="color:#ABB2BF;">(res.</span><span style="color:#61AFEF;">next</span><span style="color:#ABB2BF;">())</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#ABB2BF;">    session.</span><span style="color:#61AFEF;">close</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">def</span><span style="color:#61AFEF;"> insert_data</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;font-style:italic;">num</span><span style="color:#ABB2BF;">: </span><span style="color:#56B6C2;">int</span><span style="color:#ABB2BF;">):</span></span>
 <span class="line"><span style="color:#56B6C2;">    print</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;insert data for table&quot;</span><span style="color:#56B6C2;"> +</span><span style="color:#56B6C2;"> str</span><span style="color:#ABB2BF;">(num))</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">    # Get a session from the pool</span></span>
 <span class="line"><span style="color:#ABB2BF;">    session </span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;"> session_pool.</span><span style="color:#61AFEF;">get_session</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"><span style="color:#ABB2BF;">    column_names </span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;"> [</span></span>
 <span class="line"><span style="color:#98C379;">        &quot;id1&quot;</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#98C379;">        &quot;attr1&quot;</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#98C379;">        &quot;m1&quot;</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#ABB2BF;">    ]</span></span>
 <span class="line"><span style="color:#ABB2BF;">    data_types </span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;"> [</span></span>
 <span class="line"><span style="color:#ABB2BF;">        TSDataType.</span><span style="color:#D19A66;">STRING</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#ABB2BF;">        TSDataType.</span><span style="color:#D19A66;">STRING</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#ABB2BF;">        TSDataType.</span><span style="color:#D19A66;">DOUBLE</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#ABB2BF;">    ]</span></span>
 <span class="line"><span style="color:#ABB2BF;">    column_types </span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;"> [ColumnType.</span><span style="color:#D19A66;">TAG</span><span style="color:#ABB2BF;">, ColumnType.</span><span style="color:#D19A66;">ATTRIBUTE</span><span style="color:#ABB2BF;">, ColumnType.</span><span style="color:#D19A66;">FIELD</span><span style="color:#ABB2BF;">]</span></span>
 <span class="line"><span style="color:#ABB2BF;">    timestamps </span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;"> []</span></span>
 <span class="line"><span style="color:#ABB2BF;">    values </span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;"> []</span></span>
 <span class="line"><span style="color:#C678DD;">    for</span><span style="color:#ABB2BF;"> row </span><span style="color:#C678DD;">in</span><span style="color:#56B6C2;"> range</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">15</span><span style="color:#ABB2BF;">):</span></span>
 <span class="line"><span style="color:#ABB2BF;">        timestamps.</span><span style="color:#61AFEF;">append</span><span style="color:#ABB2BF;">(row)</span></span>
 <span class="line"><span style="color:#ABB2BF;">        values.</span><span style="color:#61AFEF;">append</span><span style="color:#ABB2BF;">([</span><span style="color:#98C379;">&quot;id:&quot;</span><span style="color:#56B6C2;"> +</span><span style="color:#56B6C2;"> str</span><span style="color:#ABB2BF;">(row), </span><span style="color:#98C379;">&quot;attr:&quot;</span><span style="color:#56B6C2;"> +</span><span style="color:#56B6C2;"> str</span><span style="color:#ABB2BF;">(row), row </span><span style="color:#56B6C2;">*</span><span style="color:#D19A66;"> 1.0</span><span style="color:#ABB2BF;">])</span></span>
 <span class="line"><span style="color:#ABB2BF;">    tablet </span><span style="color:#56B6C2;">=</span><span style="color:#61AFEF;"> Tablet</span><span style="color:#ABB2BF;">(</span></span>
 <span class="line"><span style="color:#98C379;">        &quot;table&quot;</span><span style="color:#56B6C2;"> +</span><span style="color:#56B6C2;"> str</span><span style="color:#ABB2BF;">(num), column_names, data_types, values, timestamps, column_types</span></span>
 <span class="line"><span style="color:#ABB2BF;">    )</span></span>
 <span class="line"><span style="color:#ABB2BF;">    session.</span><span style="color:#61AFEF;">insert</span><span style="color:#ABB2BF;">(tablet)</span></span>
 <span class="line"><span style="color:#ABB2BF;">    session.</span><span style="color:#61AFEF;">execute_non_query_statement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;FLush&quot;</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#ABB2BF;">    np_timestamps </span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;"> np.</span><span style="color:#61AFEF;">arange</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">15</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">30</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;font-style:italic;">dtype</span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;">np.</span><span style="color:#61AFEF;">dtype</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;&gt;i8&quot;</span><span style="color:#ABB2BF;">))</span></span>
 <span class="line"><span style="color:#ABB2BF;">    np_values </span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;"> [</span></span>
 <span class="line"><span style="color:#ABB2BF;">        np.</span><span style="color:#61AFEF;">array</span><span style="color:#ABB2BF;">([</span><span style="color:#98C379;">&quot;id:</span><span style="color:#D19A66;">{}</span><span style="color:#98C379;">&quot;</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">format</span><span style="color:#ABB2BF;">(i) </span><span style="color:#C678DD;">for</span><span style="color:#ABB2BF;"> i </span><span style="color:#C678DD;">in</span><span style="color:#56B6C2;"> range</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">15</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">30</span><span style="color:#ABB2BF;">)]),</span></span>
 <span class="line"><span style="color:#ABB2BF;">        np.</span><span style="color:#61AFEF;">array</span><span style="color:#ABB2BF;">([</span><span style="color:#98C379;">&quot;attr:</span><span style="color:#D19A66;">{}</span><span style="color:#98C379;">&quot;</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">format</span><span style="color:#ABB2BF;">(i) </span><span style="color:#C678DD;">for</span><span style="color:#ABB2BF;"> i </span><span style="color:#C678DD;">in</span><span style="color:#56B6C2;"> range</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">15</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">30</span><span style="color:#ABB2BF;">)]),</span></span>
 <span class="line"><span style="color:#ABB2BF;">        np.</span><span style="color:#61AFEF;">linspace</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">15.0</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">29.0</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;font-style:italic;">num</span><span style="color:#56B6C2;">=</span><span style="color:#D19A66;">15</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;font-style:italic;">dtype</span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;">TSDataType.</span><span style="color:#D19A66;">DOUBLE</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">np_dtype</span><span style="color:#ABB2BF;">()),</span></span>
 <span class="line"><span style="color:#ABB2BF;">    ]</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#ABB2BF;">    np_tablet </span><span style="color:#56B6C2;">=</span><span style="color:#61AFEF;"> NumpyTablet</span><span style="color:#ABB2BF;">(</span></span>
 <span class="line"><span style="color:#98C379;">        &quot;table&quot;</span><span style="color:#56B6C2;"> +</span><span style="color:#56B6C2;"> str</span><span style="color:#ABB2BF;">(num),</span></span>
 <span class="line"><span style="color:#ABB2BF;">        column_names,</span></span>
 <span class="line"><span style="color:#ABB2BF;">        data_types,</span></span>
 <span class="line"><span style="color:#ABB2BF;">        np_values,</span></span>
 <span class="line"><span style="color:#ABB2BF;">        np_timestamps,</span></span>
 <span class="line"><span style="color:#E06C75;font-style:italic;">        column_types</span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;">column_types,</span></span>
 <span class="line"><span style="color:#ABB2BF;">    )</span></span>
 <span class="line"><span style="color:#ABB2BF;">    session.</span><span style="color:#61AFEF;">insert</span><span style="color:#ABB2BF;">(np_tablet)</span></span>
 <span class="line"><span style="color:#ABB2BF;">    session.</span><span style="color:#61AFEF;">close</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">def</span><span style="color:#61AFEF;"> query_data</span><span style="color:#ABB2BF;">():</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">    # Get a session from the pool</span></span>
 <span class="line"><span style="color:#ABB2BF;">    session </span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;"> session_pool.</span><span style="color:#61AFEF;">get_session</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#56B6C2;">    print</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;get data from table0&quot;</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#C678DD;">    with</span><span style="color:#ABB2BF;"> session.</span><span style="color:#61AFEF;">execute_query_statement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;select * from table0&quot;</span><span style="color:#ABB2BF;">) </span><span style="color:#C678DD;">as</span><span style="color:#ABB2BF;"> res:</span></span>
 <span class="line"><span style="color:#C678DD;">        while</span><span style="color:#ABB2BF;"> res.</span><span style="color:#61AFEF;">has_next</span><span style="color:#ABB2BF;">():</span></span>
 <span class="line"><span style="color:#56B6C2;">            print</span><span style="color:#ABB2BF;">(res.</span><span style="color:#61AFEF;">next</span><span style="color:#ABB2BF;">())</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#56B6C2;">    print</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;get data from table1&quot;</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#C678DD;">    with</span><span style="color:#ABB2BF;"> session.</span><span style="color:#61AFEF;">execute_query_statement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;select * from table1&quot;</span><span style="color:#ABB2BF;">) </span><span style="color:#C678DD;">as</span><span style="color:#ABB2BF;"> res:</span></span>
 <span class="line"><span style="color:#C678DD;">      while</span><span style="color:#ABB2BF;"> res.</span><span style="color:#61AFEF;">has_next</span><span style="color:#ABB2BF;">():</span></span>
 <span class="line"><span style="color:#56B6C2;">          print</span><span style="color:#ABB2BF;">(res.</span><span style="color:#61AFEF;">next</span><span style="color:#ABB2BF;">())</span></span>
 <span class="line"><span style="color:#ABB2BF;">    </span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">    # 使用分批DataFrame方式查询表数据（推荐大数据量场景）</span></span>
 <span class="line"><span style="color:#56B6C2;">    print</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;get data from table0 using batch DataFrame&quot;</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#C678DD;">    with</span><span style="color:#ABB2BF;"> session.</span><span style="color:#61AFEF;">execute_query_statement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;select * from table0&quot;</span><span style="color:#ABB2BF;">) </span><span style="color:#C678DD;">as</span><span style="color:#ABB2BF;"> res: </span></span>
 <span class="line"><span style="color:#C678DD;">      while</span><span style="color:#ABB2BF;"> res.</span><span style="color:#61AFEF;">has_next_df</span><span style="color:#ABB2BF;">(): </span></span>
 <span class="line"><span style="color:#56B6C2;">          print</span><span style="color:#ABB2BF;">(res.</span><span style="color:#61AFEF;">next_df</span><span style="color:#ABB2BF;">()) </span></span>
 <span class="line"><span style="color:#ABB2BF;">    session.</span><span style="color:#61AFEF;">close</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">def</span><span style="color:#61AFEF;"> delete_data</span><span style="color:#ABB2BF;">():</span></span>
 <span class="line"><span style="color:#ABB2BF;">    session </span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;"> session_pool.</span><span style="color:#61AFEF;">get_session</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"><span style="color:#ABB2BF;">    session.</span><span style="color:#61AFEF;">execute_non_query_statement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;drop database db1&quot;</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#56B6C2;">    print</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;data has been deleted. now the databases are:&quot;</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#C678DD;">    with</span><span style="color:#ABB2BF;"> session.</span><span style="color:#61AFEF;">execute_query_statement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;show databases&quot;</span><span style="color:#ABB2BF;">) </span><span style="color:#C678DD;">as</span><span style="color:#ABB2BF;"> res:</span></span>
 <span class="line"><span style="color:#C678DD;">        while</span><span style="color:#ABB2BF;"> res.</span><span style="color:#61AFEF;">has_next</span><span style="color:#ABB2BF;">():</span></span>
 <span class="line"><span style="color:#56B6C2;">            print</span><span style="color:#ABB2BF;">(res.</span><span style="color:#61AFEF;">next</span><span style="color:#ABB2BF;">())</span></span>
 <span class="line"><span style="color:#ABB2BF;">    session.</span><span style="color:#61AFEF;">close</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"></span>
 <span class="line"></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;"># Create a session pool</span></span>
 <span class="line"><span style="color:#ABB2BF;">username </span><span style="color:#56B6C2;">=</span><span style="color:#98C379;"> &quot;root&quot;</span></span>
 <span class="line"><span style="color:#ABB2BF;">password </span><span style="color:#56B6C2;">=</span><span style="color:#98C379;"> &quot;root&quot;</span></span>
 <span class="line"><span style="color:#ABB2BF;">node_urls </span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;"> [</span><span style="color:#98C379;">&quot;127.0.0.1:6667&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#98C379;">&quot;127.0.0.1:6668&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#98C379;">&quot;127.0.0.1:6669&quot;</span><span style="color:#ABB2BF;">]</span></span>
 <span class="line"><span style="color:#ABB2BF;">fetch_size </span><span style="color:#56B6C2;">=</span><span style="color:#D19A66;"> 1024</span></span>
 <span class="line"><span style="color:#ABB2BF;">database </span><span style="color:#56B6C2;">=</span><span style="color:#98C379;"> &quot;db1&quot;</span></span>
 <span class="line"><span style="color:#ABB2BF;">max_pool_size </span><span style="color:#56B6C2;">=</span><span style="color:#D19A66;"> 5</span></span>
 <span class="line"><span style="color:#ABB2BF;">wait_timeout_in_ms </span><span style="color:#56B6C2;">=</span><span style="color:#D19A66;"> 3000</span></span>
 <span class="line"><span style="color:#ABB2BF;">config </span><span style="color:#56B6C2;">=</span><span style="color:#61AFEF;"> TableSessionPoolConfig</span><span style="color:#ABB2BF;">(</span></span>
 <span class="line"><span style="color:#E06C75;font-style:italic;">    node_urls</span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;">node_urls,</span></span>
 <span class="line"><span style="color:#E06C75;font-style:italic;">    username</span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;">username,</span></span>
 <span class="line"><span style="color:#E06C75;font-style:italic;">    password</span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;">password,</span></span>
 <span class="line"><span style="color:#E06C75;font-style:italic;">    database</span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;">database,</span></span>
 <span class="line"><span style="color:#E06C75;font-style:italic;">    max_pool_size</span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;">max_pool_size,</span></span>
 <span class="line"><span style="color:#E06C75;font-style:italic;">    fetch_size</span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;">fetch_size,</span></span>
 <span class="line"><span style="color:#E06C75;font-style:italic;">    wait_timeout_in_ms</span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;">wait_timeout_in_ms,</span></span>
 <span class="line"><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#ABB2BF;">session_pool </span><span style="color:#56B6C2;">=</span><span style="color:#61AFEF;"> TableSessionPool</span><span style="color:#ABB2BF;">(config)</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#61AFEF;">prepare_data</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#ABB2BF;">insert_thread1 </span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;"> threading.</span><span style="color:#61AFEF;">Thread</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;font-style:italic;">target</span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;">insert_data, </span><span style="color:#E06C75;font-style:italic;">args</span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">0</span><span style="color:#ABB2BF;">,))</span></span>
 <span class="line"><span style="color:#ABB2BF;">insert_thread2 </span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;"> threading.</span><span style="color:#61AFEF;">Thread</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;font-style:italic;">target</span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;">insert_data, </span><span style="color:#E06C75;font-style:italic;">args</span><span style="color:#56B6C2;">=</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">1</span><span style="color:#ABB2BF;">,))</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#ABB2BF;">insert_thread1.</span><span style="color:#61AFEF;">start</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"><span style="color:#ABB2BF;">insert_thread2.</span><span style="color:#61AFEF;">start</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#ABB2BF;">insert_thread1.</span><span style="color:#61AFEF;">join</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"><span style="color:#ABB2BF;">insert_thread2.</span><span style="color:#61AFEF;">join</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#61AFEF;">query_data</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"><span style="color:#61AFEF;">delete_data</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"><span style="color:#ABB2BF;">session_pool.</span><span style="color:#61AFEF;">close</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"><span style="color:#56B6C2;">print</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;example is finished!&quot;</span><span style="color:#ABB2BF;">)</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></div><!----><!----><!----></div><footer class="vp-page-meta"><div class="vp-meta-item edit-link"><a class="auto-link external-link vp-meta-label" href="https://github.com/apache/iotdb-docs/edit/main/src/zh/UserGuide/latest-Table/API/Programming-Python-Native-API_apache.md" aria-label="发现错误？在 GitHub 上编辑此页" rel="noopener noreferrer" target="_blank"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="edit icon" name="edit"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->发现错误？在 GitHub 上编辑此页<!----></a></div><div class="vp-meta-item git-info"><div class="update-time"><span class="vp-meta-label">最近更新: </span><time class="vp-meta-info" datetime="2026-04-15T10:39:00.000Z" data-allow-mismatch>2026/4/15 10:39</time></div><!----></div></footer><nav class="vp-page-nav"><a class="route-link auto-link prev" href="/zh/UserGuide/latest-Table/API/Programming-Java-Native-API_apache.html" aria-label="Java原生接口"><div class="hint"><span class="arrow start"></span>上一页</div><div class="link"><!---->Java原生接口</div></a><a class="route-link auto-link next" href="/zh/UserGuide/latest-Table/API/Programming-Cpp-Native-API_apache.html" aria-label="C++原生接口"><div class="hint">下一页<span class="arrow end"></span></div><div class="link">C++原生接口<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer class="site-footer"><span id="doc-version" style="display:none;">latest-Table</span><p class="copyright-text">版权所有 © 2026 Apache软件基金会。
 Apache IoTDB，IoTDB，Apache，Apache 羽毛标志和 Apache IoTDB 项目标志是 Apache 软件基金会在所有国家的注册商标或商标</p><p style="text-align:center;margin-top:10px;color:#909399;font-size:12px;margin:0 30px;"><strong>有问题吗？</strong> 在 QQ、微信或 Slack 上联系我们。 <a href="https://github.com/apache/iotdb/issues/1995">立即加入社区</a></p></footer></div><!--]--><!--]--><!--[--><!----><!--]--><!--]--></div>
     <script type="module" src="/assets/app-Bs_hKxCZ.js" defer></script>
   </body>
 </html>