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import{_ as o,c as p,b as a,d as l,e as n,a as t,w as r,r as c,o as i}from"./app-pmkzp6TS.js";const d={};function B(y,s){const e=c("RouteLink");return i(),p("div",null,[s[4]||(s[4]=a(`<h1 id="go-原生接口" tabindex="-1"><a class="header-anchor" href="#go-原生接口"><span>Go 原生接口</span></a></h1><p>Go 原生 API 支持通过 <code>Session </code>和 <code>SessionPool </code>两种方式与数据库进行交互。由于 <code>Session </code>非线程安全，因此强烈推荐使用 <code>SessionPool </code>编程。在多线程并发的情形下，<code>SessionPool </code>能够合理地管理和分配连接资源，以提升系统性能与资源利用效率。</p><p>本文将围绕 <code>SessionPool</code> 的使用进行说明，涵盖从环境准备、核心操作步骤到全量接口的完整内容。</p><h2 id="_1-环境准备" tabindex="-1"><a class="header-anchor" href="#_1-环境准备"><span>1. 环境准备</span></a></h2><h3 id="_1-1-前置依赖" tabindex="-1"><a class="header-anchor" href="#_1-1-前置依赖"><span>1.1 前置依赖</span></a></h3><ul><li>golang &gt;= 1.13</li><li>make &gt;= 3.0</li><li>curl &gt;= 7.1.1</li><li>thrift: 0.15.0</li><li>Linux、Macos 或其他类 unix 系统</li><li>Windows+bash (下载 IoTDB Go client 需要 git ，通过 WSL、cygwin、Git Bash 任意一种方式均可)</li></ul><h3 id="_1-2-安装方法" tabindex="-1"><a class="header-anchor" href="#_1-2-安装方法"><span>1.2 安装方法</span></a></h3><ul><li>使用 go mod</li></ul><div class="language-bash line-numbers-mode" data-highlighter="shiki" data-ext="bash" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-bash"><span class="line"><span style="color:#7F848E;font-style:italic;"># 切换到 GOPATH 的 HOME 路径，启用 Go Modules 功能</span></span>
<span class="line"><span style="color:#C678DD;">export</span><span style="color:#E06C75;"> GO111MODULE</span><span style="color:#56B6C2;">=</span><span style="color:#E06C75;">on</span></span>
<span class="line"></span>
<span class="line"><span style="color:#7F848E;font-style:italic;"># 配置 GOPROXY 环境变量</span></span>
<span class="line"><span style="color:#C678DD;">export</span><span style="color:#E06C75;"> GOPROXY</span><span style="color:#56B6C2;">=</span><span style="color:#E06C75;">https</span><span style="color:#ABB2BF;">://</span><span style="color:#E06C75;">goproxy</span><span style="color:#ABB2BF;">.</span><span style="color:#E06C75;">io</span></span>
<span class="line"></span>
<span class="line"><span style="color:#7F848E;font-style:italic;"># 创建命名的文件夹或目录，并切换当前目录</span></span>
<span class="line"><span style="color:#61AFEF;">mkdir</span><span style="color:#98C379;"> session_example</span><span style="color:#ABB2BF;"> &amp;&amp; </span><span style="color:#56B6C2;">cd</span><span style="color:#98C379;"> session_example</span></span>
<span class="line"></span>
<span class="line"><span style="color:#7F848E;font-style:italic;"># 保存文件，自动跳转到新的地址</span></span>
<span class="line"><span style="color:#61AFEF;">curl</span><span style="color:#D19A66;"> -o</span><span style="color:#98C379;"> session_example.go</span><span style="color:#D19A66;"> -L</span><span style="color:#98C379;"> https://github.com/apache/iotdb-client-go/raw/main/example/session_example.go</span></span>
<span class="line"></span>
<span class="line"><span style="color:#7F848E;font-style:italic;"># 初始化 go module 环境</span></span>
<span class="line"><span style="color:#61AFEF;">go</span><span style="color:#98C379;"> mod</span><span style="color:#98C379;"> init</span><span style="color:#98C379;"> session_example</span></span>
<span class="line"></span>
<span class="line"><span style="color:#7F848E;font-style:italic;"># 下载依赖包</span></span>
<span class="line"><span style="color:#61AFEF;">go</span><span style="color:#98C379;"> mod</span><span style="color:#98C379;"> tidy</span></span>
<span class="line"></span>
<span class="line"><span style="color:#7F848E;font-style:italic;"># 编译并运行程序</span></span>
<span class="line"><span style="color:#61AFEF;">go</span><span style="color:#98C379;"> run</span><span style="color:#98C379;"> session_example.go</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></div><ul><li>使用 GOPATH</li></ul><div class="language-bash line-numbers-mode" data-highlighter="shiki" data-ext="bash" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-bash"><span class="line"><span style="color:#7F848E;font-style:italic;"># get thrift 0.13.0</span></span>
<span class="line"><span style="color:#61AFEF;">go</span><span style="color:#98C379;"> get</span><span style="color:#98C379;"> github.com/apache/thrift@0.13.0</span></span>
<span class="line"></span>
<span class="line"><span style="color:#7F848E;font-style:italic;"># 递归创建目录</span></span>
<span class="line"><span style="color:#61AFEF;">mkdir</span><span style="color:#D19A66;"> -p</span><span style="color:#E06C75;"> $GOPATH</span><span style="color:#98C379;">/src/iotdb-client-go-example/session_example</span></span>
<span class="line"></span>
<span class="line"><span style="color:#7F848E;font-style:italic;"># 切换到当前目录</span></span>
<span class="line"><span style="color:#56B6C2;">cd</span><span style="color:#E06C75;"> $GOPATH</span><span style="color:#98C379;">/src/iotdb-client-go-example/session_example</span></span>
<span class="line"></span>
<span class="line"><span style="color:#7F848E;font-style:italic;"># 保存文件，自动跳转到新的地址</span></span>
<span class="line"><span style="color:#61AFEF;">curl</span><span style="color:#D19A66;"> -o</span><span style="color:#98C379;"> session_example.go</span><span style="color:#D19A66;"> -L</span><span style="color:#98C379;"> https://github.com/apache/iotdb-client-go/raw/main/example/session_example.go</span></span>
<span class="line"></span>
<span class="line"><span style="color:#7F848E;font-style:italic;"># 初始化 go module 环境</span></span>
<span class="line"><span style="color:#61AFEF;">go</span><span style="color:#98C379;"> mod</span><span style="color:#98C379;"> init</span></span>
<span class="line"></span>
<span class="line"><span style="color:#7F848E;font-style:italic;"># 下载依赖包</span></span>
<span class="line"><span style="color:#61AFEF;">go</span><span style="color:#98C379;"> mod</span><span style="color:#98C379;"> tidy</span></span>
<span class="line"></span>
<span class="line"><span style="color:#7F848E;font-style:italic;"># 编译并运行程序</span></span>
<span class="line"><span style="color:#61AFEF;">go</span><span style="color:#98C379;"> run</span><span style="color:#98C379;"> session_example.go</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></div><ul><li>注意：请勿使用高版本客户端连接低版本服务。</li></ul><h2 id="_2-核心步骤" tabindex="-1"><a class="header-anchor" href="#_2-核心步骤"><span>2. 核心步骤</span></a></h2><p>使用 Go 原生接口操作 IoTDB 的三个核心步骤如下：</p><ol><li>创建连接池实例：初始化一个<code>SessionPool</code>对象，配置连接参数和池大小。</li><li>执行数据库操作：从连接池中<code>GetSession()</code>，执行数据写入或查询等操作，完成后必须<code>PutBack(session)</code>。</li><li>关闭连接池资源：程序结束时调用<code>sessionPool.Close()</code>，释放所有连接。</li></ol>`,15)),l("p",null,[s[1]||(s[1]=n("下面的章节用于说明开发的核心流程，并未演示所有的参数和接口，如需了解全部功能及参数请参见: ",-1)),t(e,{to:"/zh/UserGuide/latest/API/Programming-Go-Native-API.html#_3-%E5%85%A8%E9%87%8F%E6%8E%A5%E5%8F%A3"},{default:r(()=>[...s[0]||(s[0]=[n("全量接口说明",-1)])]),_:1}),s[2]||(s[2]=n(" 或 查阅: ",-1)),s[3]||(s[3]=l("a",{href:"https://github.com/apache/iotdb-client-go/blob/main/example/session_pool/session_pool_example.go",target:"_blank",rel:"noopener noreferrer"},"SessionPool 示例源码",-1))]),s[5]||(s[5]=a(`<h3 id="_2-1-创建连接池实例" tabindex="-1"><a class="header-anchor" href="#_2-1-创建连接池实例"><span>2.1 创建连接池实例</span></a></h3><ul><li>单实例</li></ul><div class="language-go line-numbers-mode" data-highlighter="shiki" data-ext="go" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-go"><span class="line"><span style="color:#E06C75;">config</span><span style="color:#E5C07B;"> :=</span><span style="color:#C678DD;"> &amp;</span><span style="color:#E5C07B;">client</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">PoolConfig</span><span style="color:#ABB2BF;">{</span></span>
<span class="line"><span style="color:#E06C75;"> Host</span><span style="color:#ABB2BF;">: </span><span style="color:#E06C75;">host</span><span style="color:#ABB2BF;">,</span></span>
<span class="line"><span style="color:#E06C75;"> Port</span><span style="color:#ABB2BF;">: </span><span style="color:#E06C75;">port</span><span style="color:#ABB2BF;">,</span></span>
<span class="line"><span style="color:#E06C75;"> UserName</span><span style="color:#ABB2BF;">: </span><span style="color:#E06C75;">user</span><span style="color:#ABB2BF;">,</span></span>
<span class="line"><span style="color:#E06C75;"> Password</span><span style="color:#ABB2BF;">: </span><span style="color:#E06C75;">password</span><span style="color:#ABB2BF;">,</span></span>
<span class="line"><span style="color:#ABB2BF;">}</span></span>
<span class="line"><span style="color:#E06C75;">sessionPool</span><span style="color:#E5C07B;"> =</span><span style="color:#E06C75;"> client</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">NewSessionPool</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">config</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">3</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">60000</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">60000</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;">defer</span><span style="color:#ABB2BF;">​ ​</span><span style="color:#E06C75;">sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">Close</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></div><ul><li>分布式或双活</li></ul><div class="language-go line-numbers-mode" data-highlighter="shiki" data-ext="go" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-go"><span class="line"><span style="color:#E06C75;">config</span><span style="color:#E5C07B;"> :=</span><span style="color:#C678DD;"> &amp;</span><span style="color:#E5C07B;">client</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">PoolConfig</span><span style="color:#ABB2BF;">{</span></span>
<span class="line"><span style="color:#E06C75;"> UserName</span><span style="color:#ABB2BF;">: </span><span style="color:#E06C75;">user</span><span style="color:#ABB2BF;">,</span></span>
<span class="line"><span style="color:#E06C75;"> Password</span><span style="color:#ABB2BF;">: </span><span style="color:#E06C75;">password</span><span style="color:#ABB2BF;">,</span></span>
<span class="line"><span style="color:#E06C75;"> NodeUrls</span><span style="color:#ABB2BF;">: </span><span style="color:#E06C75;">strings</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">Split</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;127.0.0.1:6667,127.0.0.1:6668&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#98C379;">&quot;,&quot;</span><span style="color:#ABB2BF;">),</span></span>
<span class="line"><span style="color:#ABB2BF;"> }</span></span>
<span class="line"><span style="color:#E06C75;">sessionPool</span><span style="color:#E5C07B;"> =</span><span style="color:#E06C75;"> client</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">NewSessionPool</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">config</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">3</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">60000</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">60000</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;">defer</span><span style="color:#ABB2BF;">​ ​</span><span style="color:#E06C75;">sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">Close</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></div><h3 id="_2-2-数据库操作" tabindex="-1"><a class="header-anchor" href="#_2-2-数据库操作"><span>2.2 数据库操作</span></a></h3><h4 id="_2-2-1-数据写入" tabindex="-1"><a class="header-anchor" href="#_2-2-1-数据写入"><span>2.2.1 数据写入</span></a></h4><div class="language-go line-numbers-mode" data-highlighter="shiki" data-ext="go" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-go"><span class="line"><span style="color:#E06C75;">session</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">err</span><span style="color:#E5C07B;"> :=</span><span style="color:#E06C75;"> sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">GetSession</span><span style="color:#ABB2BF;">()</span></span>
<span class="line"><span style="color:#C678DD;">defer</span><span style="color:#E06C75;"> sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">PutBack</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">session</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#E06C75;">status</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">err</span><span style="color:#E5C07B;"> :=</span><span style="color:#E06C75;"> session</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">InsertTablet</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">tablet</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">false</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#E06C75;">tablet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">Reset</span><span style="color:#ABB2BF;">()</span></span>
<span class="line"><span style="color:#61AFEF;">checkError</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">status</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">err</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></div><h4 id="_2-2-2-数据查询" tabindex="-1"><a class="header-anchor" href="#_2-2-2-数据查询"><span>2.2.2 数据查询</span></a></h4><div class="language-go line-numbers-mode" data-highlighter="shiki" data-ext="go" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-go"><span class="line"><span style="color:#C678DD;">var</span><span style="color:#E06C75;"> timeout</span><span style="color:#C678DD;"> int64</span><span style="color:#E5C07B;"> =</span><span style="color:#D19A66;"> 1000</span></span>
<span class="line"><span style="color:#E06C75;">session</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">err</span><span style="color:#E5C07B;"> :=</span><span style="color:#E06C75;"> sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">GetSession</span><span style="color:#ABB2BF;">()</span></span>
<span class="line"><span style="color:#C678DD;">defer</span><span style="color:#E06C75;"> sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">PutBack</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">session</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#C678DD;">if</span><span style="color:#E06C75;"> err</span><span style="color:#56B6C2;"> !=</span><span style="color:#D19A66;"> nil</span><span style="color:#ABB2BF;"> {</span></span>
<span class="line"><span style="color:#E06C75;"> log</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">Print</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">err</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#C678DD;"> return</span></span>
<span class="line"><span style="color:#ABB2BF;">}</span></span>
<span class="line"><span style="color:#E06C75;">sessionDataSet</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">err</span><span style="color:#E5C07B;"> :=</span><span style="color:#E06C75;"> session</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">ExecuteQueryStatement</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">sql</span><span style="color:#ABB2BF;">, </span><span style="color:#C678DD;">&amp;</span><span style="color:#E06C75;">timeout</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#C678DD;">if</span><span style="color:#E06C75;"> err</span><span style="color:#56B6C2;"> ==</span><span style="color:#D19A66;"> nil</span><span style="color:#ABB2BF;"> {</span></span>
<span class="line"><span style="color:#C678DD;"> defer</span><span style="color:#E06C75;"> sessionDataSet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">Close</span><span style="color:#ABB2BF;">()</span></span>
<span class="line"><span style="color:#61AFEF;"> printDataSet</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">sessionDataSet</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#ABB2BF;">} </span><span style="color:#C678DD;">else</span><span style="color:#ABB2BF;"> {</span></span>
<span class="line"><span style="color:#E06C75;"> log</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">Println</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">err</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><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></div><h3 id="_2-3-使用示例" tabindex="-1"><a class="header-anchor" href="#_2-3-使用示例"><span>2.3 使用示例</span></a></h3><div class="language-go line-numbers-mode" data-highlighter="shiki" data-ext="go" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-go"><span class="line"><span style="color:#C678DD;">import</span><span style="color:#ABB2BF;"> (</span></span>
<span class="line"><span style="color:#98C379;"> &quot;flag&quot;</span></span>
<span class="line"><span style="color:#98C379;"> &quot;fmt&quot;</span></span>
<span class="line"><span style="color:#98C379;"> &quot;log&quot;</span></span>
<span class="line"><span style="color:#98C379;"> &quot;math/rand&quot;</span></span>
<span class="line"><span style="color:#98C379;"> &quot;strings&quot;</span></span>
<span class="line"><span style="color:#98C379;"> &quot;time&quot;</span></span>
<span class="line"></span>
<span class="line"><span style="color:#98C379;"> &quot;github.com/apache/iotdb-client-go/v2/client&quot;</span></span>
<span class="line"><span style="color:#98C379;"> &quot;github.com/apache/iotdb-client-go/v2/common&quot;</span></span>
<span class="line"><span style="color:#ABB2BF;">)</span></span>
<span class="line"></span>
<span class="line"><span style="color:#C678DD;">var</span><span style="color:#ABB2BF;"> (</span></span>
<span class="line"><span style="color:#E06C75;"> host</span><span style="color:#C678DD;"> string</span></span>
<span class="line"><span style="color:#E06C75;"> port</span><span style="color:#C678DD;"> string</span></span>
<span class="line"><span style="color:#E06C75;"> user</span><span style="color:#C678DD;"> string</span></span>
<span class="line"><span style="color:#E06C75;"> password</span><span style="color:#C678DD;"> string</span></span>
<span class="line"><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#C678DD;">var</span><span style="color:#E06C75;"> sessionPool</span><span style="color:#E5C07B;"> client</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">SessionPool</span></span>
<span class="line"></span>
<span class="line"><span style="color:#C678DD;">func</span><span style="color:#61AFEF;"> main</span><span style="color:#ABB2BF;">() {</span></span>
<span class="line"><span style="color:#E06C75;"> flag</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">StringVar</span><span style="color:#ABB2BF;">(</span><span style="color:#C678DD;">&amp;</span><span style="color:#E06C75;">host</span><span style="color:#ABB2BF;">, </span><span style="color:#98C379;">&quot;host&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#98C379;">&quot;127.0.0.1&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#98C379;">&quot;--host=192.168.1.100&quot;</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#E06C75;"> flag</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">StringVar</span><span style="color:#ABB2BF;">(</span><span style="color:#C678DD;">&amp;</span><span style="color:#E06C75;">port</span><span style="color:#ABB2BF;">, </span><span style="color:#98C379;">&quot;port&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#98C379;">&quot;6667&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#98C379;">&quot;--port=6667&quot;</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#E06C75;"> flag</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">StringVar</span><span style="color:#ABB2BF;">(</span><span style="color:#C678DD;">&amp;</span><span style="color:#E06C75;">user</span><span style="color:#ABB2BF;">, </span><span style="color:#98C379;">&quot;user&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#98C379;">&quot;root&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#98C379;">&quot;--user=root&quot;</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#E06C75;"> flag</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">StringVar</span><span style="color:#ABB2BF;">(</span><span style="color:#C678DD;">&amp;</span><span style="color:#E06C75;">password</span><span style="color:#ABB2BF;">, </span><span style="color:#98C379;">&quot;password&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#98C379;">&quot;root&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#98C379;">&quot;--password=root&quot;</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#E06C75;"> flag</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">Parse</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;"> //1.创建连接池</span></span>
<span class="line"><span style="color:#E06C75;"> config</span><span style="color:#E5C07B;"> :=</span><span style="color:#C678DD;"> &amp;</span><span style="color:#E5C07B;">client</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">PoolConfig</span><span style="color:#ABB2BF;">{</span></span>
<span class="line"><span style="color:#E06C75;"> Host</span><span style="color:#ABB2BF;">: </span><span style="color:#E06C75;">host</span><span style="color:#ABB2BF;">,</span></span>
<span class="line"><span style="color:#E06C75;"> Port</span><span style="color:#ABB2BF;">: </span><span style="color:#E06C75;">port</span><span style="color:#ABB2BF;">,</span></span>
<span class="line"><span style="color:#E06C75;"> UserName</span><span style="color:#ABB2BF;">: </span><span style="color:#E06C75;">user</span><span style="color:#ABB2BF;">,</span></span>
<span class="line"><span style="color:#E06C75;"> Password</span><span style="color:#ABB2BF;">: </span><span style="color:#E06C75;">password</span><span style="color:#ABB2BF;">,</span></span>
<span class="line"><span style="color:#ABB2BF;"> }</span></span>
<span class="line"><span style="color:#E06C75;"> sessionPool</span><span style="color:#E5C07B;"> =</span><span style="color:#E06C75;"> client</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">NewSessionPool</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">config</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">3</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">60000</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">60000</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">false</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"></span>
<span class="line"><span style="color:#C678DD;"> defer</span><span style="color:#E06C75;"> sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">Close</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;"> //2.创建存储组</span></span>
<span class="line"><span style="color:#61AFEF;"> setStorageGroup</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg1&quot;</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;"> //3. 创建时间序列</span></span>
<span class="line"><span style="color:#61AFEF;"> createTimeseries</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg1.dev1.temperature&quot;</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;"> //4.数据写入</span></span>
<span class="line"><span style="color:#61AFEF;"> insertTablet</span><span style="color:#ABB2BF;">()</span></span>
<span class="line"></span>
<span class="line"><span style="color:#7F848E;font-style:italic;"> //5. 数据查询</span></span>
<span class="line"><span style="color:#61AFEF;"> executeQueryStatement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;select temperature from root.sg1.dev1&quot;</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;"> //6. 删除</span></span>
<span class="line"><span style="color:#61AFEF;"> deleteTimeseries</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg1.dev1.temperature&quot;</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#61AFEF;"> deleteStorageGroup</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg1&quot;</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"></span>
<span class="line"><span style="color:#ABB2BF;">}</span></span>
<span class="line"></span>
<span class="line"><span style="color:#7F848E;font-style:italic;">// 设置存储组</span></span>
<span class="line"><span style="color:#C678DD;">func</span><span style="color:#61AFEF;"> setStorageGroup</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;font-style:italic;">sg</span><span style="color:#C678DD;"> string</span><span style="color:#ABB2BF;">) {</span></span>
<span class="line"><span style="color:#E06C75;"> session</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">err</span><span style="color:#E5C07B;"> :=</span><span style="color:#E06C75;"> sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">GetSession</span><span style="color:#ABB2BF;">()</span></span>
<span class="line"><span style="color:#C678DD;"> defer</span><span style="color:#E06C75;"> sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">PutBack</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">session</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#C678DD;"> if</span><span style="color:#E06C75;"> err</span><span style="color:#56B6C2;"> ==</span><span style="color:#D19A66;"> nil</span><span style="color:#ABB2BF;"> {</span></span>
<span class="line"><span style="color:#E06C75;"> session</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">SetStorageGroup</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">sg</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><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:#7F848E;font-style:italic;">// 删除存储组</span></span>
<span class="line"><span style="color:#C678DD;">func</span><span style="color:#61AFEF;"> deleteStorageGroup</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;font-style:italic;">sg</span><span style="color:#C678DD;"> string</span><span style="color:#ABB2BF;">) {</span></span>
<span class="line"><span style="color:#E06C75;"> session</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">err</span><span style="color:#E5C07B;"> :=</span><span style="color:#E06C75;"> sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">GetSession</span><span style="color:#ABB2BF;">()</span></span>
<span class="line"><span style="color:#C678DD;"> defer</span><span style="color:#E06C75;"> sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">PutBack</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">session</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#C678DD;"> if</span><span style="color:#E06C75;"> err</span><span style="color:#56B6C2;"> ==</span><span style="color:#D19A66;"> nil</span><span style="color:#ABB2BF;"> {</span></span>
<span class="line"><span style="color:#61AFEF;"> checkError</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">session</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">DeleteStorageGroup</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">sg</span><span style="color:#ABB2BF;">))</span></span>
<span class="line"><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:#7F848E;font-style:italic;">// 创建时间序列</span></span>
<span class="line"><span style="color:#C678DD;">func</span><span style="color:#61AFEF;"> createTimeseries</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;font-style:italic;">path</span><span style="color:#C678DD;"> string</span><span style="color:#ABB2BF;">) {</span></span>
<span class="line"><span style="color:#C678DD;"> var</span><span style="color:#ABB2BF;"> (</span></span>
<span class="line"><span style="color:#E06C75;"> dataType</span><span style="color:#E5C07B;"> =</span><span style="color:#E06C75;"> client</span><span style="color:#ABB2BF;">.</span><span style="color:#E06C75;">FLOAT</span></span>
<span class="line"><span style="color:#E06C75;"> encoding</span><span style="color:#E5C07B;"> =</span><span style="color:#E06C75;"> client</span><span style="color:#ABB2BF;">.</span><span style="color:#E06C75;">PLAIN</span></span>
<span class="line"><span style="color:#E06C75;"> compressor</span><span style="color:#E5C07B;"> =</span><span style="color:#E06C75;"> client</span><span style="color:#ABB2BF;">.</span><span style="color:#E06C75;">SNAPPY</span></span>
<span class="line"><span style="color:#ABB2BF;"> )</span></span>
<span class="line"><span style="color:#E06C75;"> session</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">err</span><span style="color:#E5C07B;"> :=</span><span style="color:#E06C75;"> sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">GetSession</span><span style="color:#ABB2BF;">()</span></span>
<span class="line"><span style="color:#C678DD;"> defer</span><span style="color:#E06C75;"> sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">PutBack</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">session</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#C678DD;"> if</span><span style="color:#E06C75;"> err</span><span style="color:#56B6C2;"> ==</span><span style="color:#D19A66;"> nil</span><span style="color:#ABB2BF;"> {</span></span>
<span class="line"><span style="color:#61AFEF;"> checkError</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">session</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">CreateTimeseries</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">path</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">dataType</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">encoding</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">compressor</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">nil</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">nil</span><span style="color:#ABB2BF;">))</span></span>
<span class="line"><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:#7F848E;font-style:italic;">// 删除时间序列</span></span>
<span class="line"><span style="color:#C678DD;">func</span><span style="color:#61AFEF;"> deleteTimeseries</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;font-style:italic;">paths</span><span style="color:#ABB2BF;"> ...</span><span style="color:#C678DD;">string</span><span style="color:#ABB2BF;">) {</span></span>
<span class="line"><span style="color:#E06C75;"> session</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">err</span><span style="color:#E5C07B;"> :=</span><span style="color:#E06C75;"> sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">GetSession</span><span style="color:#ABB2BF;">()</span></span>
<span class="line"><span style="color:#C678DD;"> defer</span><span style="color:#E06C75;"> sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">PutBack</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">session</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#C678DD;"> if</span><span style="color:#E06C75;"> err</span><span style="color:#56B6C2;"> ==</span><span style="color:#D19A66;"> nil</span><span style="color:#ABB2BF;"> {</span></span>
<span class="line"><span style="color:#61AFEF;"> checkError</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">session</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">DeleteTimeseries</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">paths</span><span style="color:#ABB2BF;">))</span></span>
<span class="line"><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:#7F848E;font-style:italic;">// 插入Tablet数据</span></span>
<span class="line"><span style="color:#C678DD;">func</span><span style="color:#61AFEF;"> insertTablet</span><span style="color:#ABB2BF;">() {</span></span>
<span class="line"><span style="color:#E06C75;"> session</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">err</span><span style="color:#E5C07B;"> :=</span><span style="color:#E06C75;"> sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">GetSession</span><span style="color:#ABB2BF;">()</span></span>
<span class="line"><span style="color:#C678DD;"> defer</span><span style="color:#E06C75;"> sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">PutBack</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">session</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#C678DD;"> if</span><span style="color:#E06C75;"> err</span><span style="color:#56B6C2;"> ==</span><span style="color:#D19A66;"> nil</span><span style="color:#ABB2BF;"> {</span></span>
<span class="line"><span style="color:#C678DD;"> if</span><span style="color:#E06C75;"> tablet</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">err</span><span style="color:#E5C07B;"> :=</span><span style="color:#61AFEF;"> createTablet</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">12</span><span style="color:#ABB2BF;">); </span><span style="color:#E06C75;">err</span><span style="color:#56B6C2;"> ==</span><span style="color:#D19A66;"> nil</span><span style="color:#ABB2BF;"> {</span></span>
<span class="line"><span style="color:#E06C75;"> status</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">err</span><span style="color:#E5C07B;"> :=</span><span style="color:#E06C75;"> session</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">InsertTablet</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">tablet</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">false</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#E06C75;"> tablet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">Reset</span><span style="color:#ABB2BF;">()</span></span>
<span class="line"><span style="color:#61AFEF;"> checkError</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">status</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">err</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#ABB2BF;"> } </span><span style="color:#C678DD;">else</span><span style="color:#ABB2BF;"> {</span></span>
<span class="line"><span style="color:#E06C75;"> log</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">Fatal</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">err</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#ABB2BF;"> }</span></span>
<span class="line"><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:#7F848E;font-style:italic;">//创建Tablet</span></span>
<span class="line"><span style="color:#C678DD;">func</span><span style="color:#61AFEF;"> createTablet</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;font-style:italic;">rowCount</span><span style="color:#C678DD;"> int</span><span style="color:#ABB2BF;">) (</span><span style="color:#C678DD;">*</span><span style="color:#E5C07B;">client</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">Tablet</span><span style="color:#ABB2BF;">, </span><span style="color:#C678DD;">error</span><span style="color:#ABB2BF;">) {</span></span>
<span class="line"><span style="color:#E06C75;"> tablet</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">err</span><span style="color:#E5C07B;"> :=</span><span style="color:#E06C75;"> client</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">NewTablet</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg1.dev1&quot;</span><span style="color:#ABB2BF;">, []</span><span style="color:#C678DD;">*</span><span style="color:#E5C07B;">client</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">MeasurementSchema</span><span style="color:#ABB2BF;">{</span></span>
<span class="line"><span style="color:#ABB2BF;"> {</span></span>
<span class="line"><span style="color:#E06C75;"> Measurement</span><span style="color:#ABB2BF;">: </span><span style="color:#98C379;">&quot;temperature&quot;</span><span style="color:#ABB2BF;">,</span></span>
<span class="line"><span style="color:#E06C75;"> DataType</span><span style="color:#ABB2BF;">: </span><span style="color:#E06C75;">client</span><span style="color:#ABB2BF;">.</span><span style="color:#E06C75;">FLOAT</span><span style="color:#ABB2BF;">,</span></span>
<span class="line"><span style="color:#ABB2BF;"> },</span></span>
<span class="line"><span style="color:#ABB2BF;"> }, </span><span style="color:#E06C75;">rowCount</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"></span>
<span class="line"><span style="color:#C678DD;"> if</span><span style="color:#E06C75;"> err</span><span style="color:#56B6C2;"> !=</span><span style="color:#D19A66;"> nil</span><span style="color:#ABB2BF;"> {</span></span>
<span class="line"><span style="color:#C678DD;"> return</span><span style="color:#D19A66;"> nil</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">err</span></span>
<span class="line"><span style="color:#ABB2BF;"> }</span></span>
<span class="line"><span style="color:#E06C75;"> ts</span><span style="color:#E5C07B;"> :=</span><span style="color:#E06C75;"> time</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">Now</span><span style="color:#ABB2BF;">().</span><span style="color:#61AFEF;">UTC</span><span style="color:#ABB2BF;">().</span><span style="color:#61AFEF;">UnixNano</span><span style="color:#ABB2BF;">() </span><span style="color:#C678DD;">/</span><span style="color:#D19A66;"> 1000000</span></span>
<span class="line"><span style="color:#C678DD;"> for</span><span style="color:#E06C75;"> row</span><span style="color:#E5C07B;"> :=</span><span style="color:#D19A66;"> 0</span><span style="color:#ABB2BF;">; </span><span style="color:#E06C75;">row</span><span style="color:#56B6C2;"> &lt;</span><span style="color:#C678DD;"> int</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">rowCount</span><span style="color:#ABB2BF;">); </span><span style="color:#E06C75;">row</span><span style="color:#56B6C2;">++</span><span style="color:#ABB2BF;"> {</span></span>
<span class="line"><span style="color:#E06C75;"> ts</span><span style="color:#56B6C2;">++</span></span>
<span class="line"><span style="color:#E06C75;"> tablet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">SetTimestamp</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">ts</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">row</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#E06C75;"> tablet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">SetValueAt</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">rand</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">Float32</span><span style="color:#ABB2BF;">(), </span><span style="color:#D19A66;">0</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">row</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#E06C75;"> tablet</span><span style="color:#ABB2BF;">.</span><span style="color:#E06C75;">RowSize</span><span style="color:#56B6C2;">++</span></span>
<span class="line"><span style="color:#ABB2BF;"> }</span></span>
<span class="line"><span style="color:#C678DD;"> return</span><span style="color:#E06C75;"> tablet</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">nil</span></span>
<span class="line"><span style="color:#ABB2BF;">}</span></span>
<span class="line"></span>
<span class="line"><span style="color:#7F848E;font-style:italic;">// 执行查询语句</span></span>
<span class="line"><span style="color:#C678DD;">func</span><span style="color:#61AFEF;"> executeQueryStatement</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;font-style:italic;">sql</span><span style="color:#C678DD;"> string</span><span style="color:#ABB2BF;">) {</span></span>
<span class="line"><span style="color:#C678DD;"> var</span><span style="color:#E06C75;"> timeout</span><span style="color:#C678DD;"> int64</span><span style="color:#E5C07B;"> =</span><span style="color:#D19A66;"> 1000</span></span>
<span class="line"><span style="color:#E06C75;"> session</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">err</span><span style="color:#E5C07B;"> :=</span><span style="color:#E06C75;"> sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">GetSession</span><span style="color:#ABB2BF;">()</span></span>
<span class="line"><span style="color:#C678DD;"> defer</span><span style="color:#E06C75;"> sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">PutBack</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">session</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#C678DD;"> if</span><span style="color:#E06C75;"> err</span><span style="color:#56B6C2;"> !=</span><span style="color:#D19A66;"> nil</span><span style="color:#ABB2BF;"> {</span></span>
<span class="line"><span style="color:#E06C75;"> log</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">Print</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">err</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#C678DD;"> return</span></span>
<span class="line"><span style="color:#ABB2BF;"> }</span></span>
<span class="line"><span style="color:#E06C75;"> sessionDataSet</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">err</span><span style="color:#E5C07B;"> :=</span><span style="color:#E06C75;"> session</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">ExecuteQueryStatement</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">sql</span><span style="color:#ABB2BF;">, </span><span style="color:#C678DD;">&amp;</span><span style="color:#E06C75;">timeout</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#C678DD;"> if</span><span style="color:#E06C75;"> err</span><span style="color:#56B6C2;"> ==</span><span style="color:#D19A66;"> nil</span><span style="color:#ABB2BF;"> {</span></span>
<span class="line"><span style="color:#C678DD;"> defer</span><span style="color:#E06C75;"> sessionDataSet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">Close</span><span style="color:#ABB2BF;">()</span></span>
<span class="line"><span style="color:#61AFEF;"> printDataSet</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">sessionDataSet</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#ABB2BF;"> } </span><span style="color:#C678DD;">else</span><span style="color:#ABB2BF;"> {</span></span>
<span class="line"><span style="color:#E06C75;"> log</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">Println</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">err</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><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:#7F848E;font-style:italic;">// 打印查询结果</span></span>
<span class="line"><span style="color:#C678DD;">func</span><span style="color:#61AFEF;"> printDataSet</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;font-style:italic;">sds</span><span style="color:#C678DD;"> *</span><span style="color:#E5C07B;">client</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">SessionDataSet</span><span style="color:#ABB2BF;">) {</span></span>
<span class="line"><span style="color:#E06C75;"> columnNames</span><span style="color:#E5C07B;"> :=</span><span style="color:#E06C75;"> sds</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">GetColumnNames</span><span style="color:#ABB2BF;">()</span></span>
<span class="line"><span style="color:#C678DD;"> for</span><span style="color:#E06C75;"> _</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">value</span><span style="color:#E5C07B;"> :=</span><span style="color:#C678DD;"> range</span><span style="color:#E06C75;"> columnNames</span><span style="color:#ABB2BF;"> {</span></span>
<span class="line"><span style="color:#E06C75;"> fmt</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">Printf</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;</span><span style="color:#D19A66;">%s</span><span style="color:#56B6C2;">\\t</span><span style="color:#98C379;">&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">value</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#ABB2BF;"> }</span></span>
<span class="line"><span style="color:#E06C75;"> fmt</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">Println</span><span style="color:#ABB2BF;">()</span></span>
<span class="line"></span>
<span class="line"><span style="color:#C678DD;"> for</span><span style="color:#E06C75;"> next</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">err</span><span style="color:#E5C07B;"> :=</span><span style="color:#E06C75;"> sds</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">Next</span><span style="color:#ABB2BF;">(); </span><span style="color:#E06C75;">err</span><span style="color:#56B6C2;"> ==</span><span style="color:#D19A66;"> nil</span><span style="color:#56B6C2;"> &amp;&amp;</span><span style="color:#E06C75;"> next</span><span style="color:#ABB2BF;">; </span><span style="color:#E06C75;">next</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">err</span><span style="color:#E5C07B;"> =</span><span style="color:#E06C75;"> sds</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">Next</span><span style="color:#ABB2BF;">() {</span></span>
<span class="line"><span style="color:#C678DD;"> for</span><span style="color:#E06C75;"> _</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">columnName</span><span style="color:#E5C07B;"> :=</span><span style="color:#C678DD;"> range</span><span style="color:#E06C75;"> columnNames</span><span style="color:#ABB2BF;"> {</span></span>
<span class="line"><span style="color:#E06C75;"> isNull</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">_</span><span style="color:#E5C07B;"> :=</span><span style="color:#E06C75;"> sds</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">IsNull</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">columnName</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"></span>
<span class="line"><span style="color:#C678DD;"> if</span><span style="color:#E06C75;"> isNull</span><span style="color:#ABB2BF;"> {</span></span>
<span class="line"><span style="color:#E06C75;"> fmt</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">Printf</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;</span><span style="color:#D19A66;">%v</span><span style="color:#56B6C2;">\\t\\t</span><span style="color:#98C379;">&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#98C379;">&quot;null&quot;</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#ABB2BF;"> } </span><span style="color:#C678DD;">else</span><span style="color:#ABB2BF;"> {</span></span>
<span class="line"><span style="color:#E06C75;"> v</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">_</span><span style="color:#E5C07B;"> :=</span><span style="color:#E06C75;"> sds</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">GetString</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">columnName</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#E06C75;"> fmt</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">Printf</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;</span><span style="color:#D19A66;">%v</span><span style="color:#56B6C2;">\\t\\t</span><span style="color:#98C379;">&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;">v</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#ABB2BF;"> }</span></span>
<span class="line"><span style="color:#ABB2BF;"> }</span></span>
<span class="line"><span style="color:#E06C75;"> fmt</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">Println</span><span style="color:#ABB2BF;">()</span></span>
<span class="line"><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:#7F848E;font-style:italic;">// 检查错误</span></span>
<span class="line"><span style="color:#C678DD;">func</span><span style="color:#61AFEF;"> checkError</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;font-style:italic;">status</span><span style="color:#C678DD;"> *</span><span style="color:#E5C07B;">common</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">TSStatus</span><span style="color:#ABB2BF;">, </span><span style="color:#E06C75;font-style:italic;">err</span><span style="color:#C678DD;"> error</span><span style="color:#ABB2BF;">) {</span></span>
<span class="line"><span style="color:#C678DD;"> if</span><span style="color:#E06C75;"> err</span><span style="color:#56B6C2;"> !=</span><span style="color:#D19A66;"> nil</span><span style="color:#ABB2BF;"> {</span></span>
<span class="line"><span style="color:#E06C75;"> log</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">Fatal</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">err</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:#C678DD;"> if</span><span style="color:#E06C75;"> status</span><span style="color:#56B6C2;"> !=</span><span style="color:#D19A66;"> nil</span><span style="color:#ABB2BF;"> {</span></span>
<span class="line"><span style="color:#C678DD;"> if</span><span style="color:#E06C75;"> err</span><span style="color:#E5C07B;"> =</span><span style="color:#E06C75;"> client</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">VerifySuccess</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">status</span><span style="color:#ABB2BF;">); </span><span style="color:#E06C75;">err</span><span style="color:#56B6C2;"> !=</span><span style="color:#D19A66;"> nil</span><span style="color:#ABB2BF;"> {</span></span>
<span class="line"><span style="color:#E06C75;"> log</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">Println</span><span style="color:#ABB2BF;">(</span><span style="color:#E06C75;">err</span><span style="color:#ABB2BF;">)</span></span>
<span class="line"><span style="color:#ABB2BF;"> }</span></span>
<span class="line"><span style="color:#ABB2BF;"> }</span></span>
<span class="line"><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 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class="line-number"></div></div></div><h2 id="_3-全量接口" tabindex="-1"><a class="header-anchor" href="#_3-全量接口"><span>3. 全量接口</span></a></h2><h3 id="_3-1-sessionpool-管理接口" tabindex="-1"><a class="header-anchor" href="#_3-1-sessionpool-管理接口"><span>3.1 SessionPool 管理接口</span></a></h3><table><thead><tr><th>接口名称</th><th>功能描述</th><th>参数说明</th></tr></thead><tbody><tr><td><code>NewSessionPool(config *PoolConfig, maxSize, connTimeoutMs, waitTimeoutMs int, enableComp bool) SessionPool</code></td><td>创建并返回一个Session连接池实例。</td><td><code>config</code>: 连接池配置 <br><code>maxSize</code>: 最大连接数(≤0时取CPU数*5) <br><code>connTimeoutMs</code>: TCP连接超时(ms) <br><code>waitTimeoutMs</code>: 获取Session等待超时(ms) <br><code>enableComp</code>: 是否启用压缩</td></tr><tr><td><code>GetSession() (Session, error)</code></td><td>从池中获取一个可用Session。若池满则阻塞等待，超时返回错误。​<strong>必须与PutBack配对使用</strong>​。</td><td>无</td></tr><tr><td><code>PutBack(session Session)</code></td><td>将使用完毕的Session归还到连接池中。</td><td><code>session</code>: 从GetSession获取的实例</td></tr><tr><td><code>Close()</code></td><td>关闭连接池，释放所有活跃连接。程序退出前必须调用。</td><td>无</td></tr></tbody></table><h3 id="_3-2-数据写入接口" tabindex="-1"><a class="header-anchor" href="#_3-2-数据写入接口"><span>3.2 数据写入接口</span></a></h3><p>以下接口需通过获取的 Session 进行调用</p><table><thead><tr><th>接口名称</th><th>功能描述</th><th>参数说明</th></tr></thead><tbody><tr><td><code>InsertRecord(deviceId string, measurements []string, dataTypes []TSDataType, values []interface{}, timestamp int64) (r common.TSStatus, err error)</code></td><td>插入单条记录。</td><td><code>deviceId</code>: 设备ID <br><code>measurements</code>: 测点列表 <br><code>dataTypes</code>: 数据类型列表<br><code>values</code>: 值列表<br><code>timestamp</code>: 时间戳</td></tr><tr><td><code>InsertAlignedRecord(deviceId string, measurements []string, dataTypes []TSDataType, values []interface{}, timestamp int64) (r common.TSStatus, err error)</code></td><td>插入单条对齐记录。</td><td><code>deviceId</code>: 设备ID<br><code>measurements</code>: 测点列表<br><code>dataTypes</code>: 数据类型列表<br><code>values</code>: 值列表<br><code>timestamp</code>: 时间戳</td></tr><tr><td><code>InsertStringRecord(deviceId string, measurements []string, values []string, timestamp int64) (r common.TSStatus, err error)</code></td><td>插入字符串格式的单条记录。</td><td><code>deviceId</code>: 设备ID<br><code>measurements</code>: 测点列表<br><code>values</code>: 字符串类型的值列表<br><code>timestamp</code>: 时间戳</td></tr><tr><td><code>InsertRecords(deviceIds []string, measurements [][]string, dataTypes [][]TSDataType, values [][]interface{}, timestamps []int64) (r common.TSStatus, err error)</code></td><td>插入多条记录。</td><td><code>deviceIds</code>: 设备ID列表<br><code>measurements</code>:二维测点列表<br><code>dataTypes</code>: 二维数据类型列表<br><code>values</code>: 二维值列表<br><code>timestamps</code>: 时间戳列表</td></tr><tr><td><code>InsertAlignedRecords(deviceIds []string, measurements [][]string, dataTypes [][]TSDataType, values [][]interface{}, timestamps []int64) (r common.TSStatus, err error)</code></td><td>插入多个对齐设备的多条记录。</td><td><code>deviceIds</code>: 设备ID列表<br><code>measurements</code>:二维测点列表<br><code>dataTypes</code>: 二维数据类型列表<br><code>values</code>: 二维值列表<br><code>timestamps</code>: 时间戳列表</td></tr><tr><td><code>InsertTablet(tablet Tablet, sorted bool) (r common.TSStatus, err error)</code></td><td>插入单个设备的多条数据。</td><td><code>tablet</code>: 要插入的<code>Tablet</code>数据<br><code>sorted</code>: 数据是否已排序</td></tr><tr><td><code>InsertAlignedTablet(tablet Tablet, sorted bool) (r common.TSStatus, err error)</code></td><td>插入单个对齐设备的多条数据。</td><td><code>tablet</code>: 要插入的<code>Tablet</code>数据<br><code>sorted</code>: 数据是否已排序</td></tr><tr><td><code>InsertTablets\`\`(tablets []Tablet, sorted bool) (r common.TSStatus, err error)</code></td><td>批量插入多个 Tablet 数据。</td><td><code>tablets</code>: 要插入的多个<code>Tablet </code>数据<br><code>sorted</code>: 数据是否已排序</td></tr><tr><td><code>InsertAlignedTablets(tablets []Tablet, sorted bool) (r common.TSStatus, err error)</code></td><td>批量插入多个对齐设备的数据。</td><td><code>tablets</code>: 要插入的多个<code>Tablet </code>数据<br><code>sorted</code>: 数据是否已排序</td></tr></tbody></table><h3 id="_3-3-sql与查询接口" tabindex="-1"><a class="header-anchor" href="#_3-3-sql与查询接口"><span>3.3 SQL与查询接口</span></a></h3><p>以下接口需通过获取的 Session 进行调用</p><table><thead><tr><th>接口名称</th><th>功能描述</th><th>参数说明</th></tr></thead><tbody><tr><td><code>ExecuteStatement(sql string)</code><em><code>(</code></em><code>SessionDataSet, error)</code></td><td>执行SQL（主要查询），返回<code>SessionDataSet</code>。</td><td><code>sql</code>：要执行的SQL查询语句</td></tr><tr><td><code>ExecuteQueryStatement(sql string, timeoutMs int64) (SessionDataSet, error)</code></td><td>执行查询SQL，可指定超时，返回<code>SessionDataSet</code>。</td><td><code>sql</code>：要执行的SQL查询语句<br><code>timeoutMs</code>: 查询超时时间（毫秒）</td></tr><tr><td><code>ExecuteNonQueryStatementExecuteNonQueryStatement(sql string) (r common.TSStatus, err error)</code></td><td>执行不返回结果集的SQL（如INSERT, CREATE, DELETE）。</td><td><code>sql</code>：要执行的SQL语句</td></tr><tr><td><code>ExecuteRawDataQuery(paths []string, startTime int64, endTime int64) (*SessionDataSet, error)</code></td><td>查询指定时间序列在时间范围内的原始数据。</td><td><code>paths</code>: 查询路径列表<br><code>startTime</code>: 起始时间戳<br><code>endTime</code>: 结束时间戳</td></tr><tr><td><code>ExecuteAggregationQuery(paths []string, aggregations []common.TAggregationType, startTime, endTime, interval, timeoutMs int64) (SessionDataSet, error)</code></td><td>执行聚合查询（COUNT, AVG等）。</td><td><code>paths</code>: 查询路径列表<br><code>aggregations</code>: 聚合类型列表<br><code>startTime, endTime, interval</code>: 起始时间、结束时间和间隔时间<br><code>timeoutMs</code>: 查询超时时间</td></tr><tr><td><code>ExecuteBatchStatement(sqls []string) (r common.TSStatus, err error)</code></td><td>批量执行多条SQL语句。</td><td><code>sqls</code>：要执行的SQL语句</td></tr></tbody></table><h3 id="_3-4-元数据操作接口" tabindex="-1"><a class="header-anchor" href="#_3-4-元数据操作接口"><span>3.4 元数据操作接口</span></a></h3><p>以下接口需通过获取的 Session 进行调用</p><table><thead><tr><th>接口名称</th><th>功能描述</th><th>参数说明</th></tr></thead><tbody><tr><td><code>SetStorageGroup(storageGroupId string) (r common.TSStatus, err error)</code></td><td>创建数据库（存储组）。</td><td><code>storageGroupId</code>：数据库（存储组）名称</td></tr><tr><td><code>DeleteStorageGroup(storageGroupId string) (r common.TSStatus, err error)</code></td><td>删除一个数据库（存储组）。</td><td><code>storageGroupId</code>：要删除的数据库（存储组）名称</td></tr><tr><td><code>DeleteStorageGroups(storageGroupIds ...string) (r common.TSStatus, err error)</code></td><td>删除多个数据库（存储组）。</td><td><code>storageGroupIds</code>：要删除的数据库（存储组）名称列表</td></tr><tr><td><code>CreateTimeseries(path string, dataType TSDataType, encoding TSEncoding, compressor TSCompressionType, attributes map[string]string, tags map[string]string) (r common.TSStatus, err error)</code></td><td>创建非对齐时间序列。</td><td><code>path</code>: 时间序列路径<br><code>dataType</code>: 数据类型<br><code>encoding</code>: 编码方式<br><code>compressor</code>: 压缩算法<br><code>attributes</code>: （可选）序列属性<br><code>tags</code>: （可选）序列标签</td></tr><tr><td><code>CreateAlignedTimeseries(prefixPath string, measurements []string, dataTypes []TSDataType, encodings []TSEncoding, compressors []TSCompressionType, measurementAlias []string) (r common.TSStatus, err error)</code></td><td>创建一组对齐时间序列。</td><td><code>prefixPath</code>: 时间序列路径前缀<br><code>measurements</code>: 测点名称列表<br><code>dataTypes, encodings, compressors</code>: 每个测点对应的数据类型、编码和压缩算法列表<br><code>measurementAlias</code>: （可选）每个测点的别名列表</td></tr><tr><td><code>DeleteTimeseries(paths []string) (r common.TSStatus, err error)</code></td><td>删除多条时间序列（含数据）。</td><td><code>paths</code>：要删除的时间序列路径列表</td></tr><tr><td><code>DeleteData(paths []string, startTime int64, endTime int64) (r common.TSStatus, err error)</code></td><td>删除指定时间序列在时间段内的数据（保留元数据）。</td><td><code>paths</code>: 要删除的时间序列路径列表<br><code>startTime</code>: 起始时间戳<br><code>endTime</code>: 结束时间戳。</td></tr><tr><td><code>SetTimeZone(timeZone string) (r common.TSStatus, err error)</code></td><td>设置当前会话时区。</td><td><code>timeZone</code>: 时区字符串，例如 ”UTC”, ”Asia/Shanghai”, ”GMT+8”</td></tr><tr><td><code>GetTimeZone() (string, error)</code></td><td>获取当前会话时区。</td><td>无</td></tr></tbody></table><h3 id="_3-5-关键配置结构-poolconfig" tabindex="-1"><a class="header-anchor" href="#_3-5-关键配置结构-poolconfig"><span>3.5 关键配置结构 (PoolConfig)</span></a></h3><table><thead><tr><th>字段</th><th>类型</th><th>必填</th><th>描述</th></tr></thead><tbody><tr><td><code>Host</code></td><td><code>string</code></td><td>与NodeUrls二选一</td><td>单节点主机地址。</td></tr><tr><td><code>Port</code></td><td><code>string</code></td><td>与NodeUrls二选一</td><td>单节点端口。</td></tr><tr><td><code>NodeUrls</code></td><td><code>[]string</code></td><td>与Host/Port二选一</td><td>集群节点地址列表，格式为<code>”host:port”</code>。</td></tr><tr><td><code>UserName</code></td><td><code>string</code></td><td>是</td><td>用户名。</td></tr><tr><td><code>Password</code></td><td><code>string</code></td><td>是</td><td>密码。</td></tr><tr><td><code>FetchSize</code></td><td><code>int32</code></td><td>否</td><td>查询结果集获取大小，默认1024。</td></tr><tr><td><code>TimeZone</code></td><td><code>string</code></td><td>否</td><td>会话时区，如<code>”Asia/Shanghai”</code>，默认使用服务端时区。</td></tr><tr><td><code>Database</code></td><td><code>string</code></td><td>否</td><td>表模型适用，用于设置会话默认数据库。</td></tr></tbody></table>`,26))])}const 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