import{_ as t,r as p,o as l,c,a as i,d as n,e as s,b as e,f as o}from"./app-u0F7ej3R.js";const r={},u=o('<h1 id="c-原生接口" tabindex="-1"><a class="header-anchor" href="#c-原生接口" aria-hidden="true">#</a> C++ 原生接口</h1><h2 id="依赖" tabindex="-1"><a class="header-anchor" href="#依赖" aria-hidden="true">#</a> 依赖</h2><ul><li>Java 8+</li><li>Maven 3.5+</li><li>Flex</li><li>Bison 2.7+</li><li>Boost 1.56+</li><li>OpenSSL 1.0+</li><li>GCC 5.5.0+</li></ul><h2 id="安装" tabindex="-1"><a class="header-anchor" href="#安装" aria-hidden="true">#</a> 安装</h2><h3 id="安装相关依赖" tabindex="-1"><a class="header-anchor" href="#安装相关依赖" aria-hidden="true">#</a> 安装相关依赖</h3>',5),d=o(`<li><p><strong>MAC</strong></p><ol><li><p>安装 Bison ：Mac 环境下预安装了 Bison 2.3 版本，但该版本过低不能够用来编译 Thrift。</p><p>使用 Bison 2.3 版本会报以下错误：<br><code>invalid directive: &#39;%code&#39;</code></p><p>使用下面 brew 命令更新 bison 版本：</p><div class="language-bash line-numbers-mode" data-ext="sh"><pre class="language-bash"><code>brew <span class="token function">install</span> bison
brew <span class="token function">link</span> bison <span class="token parameter variable">--force</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>添加环境变量：</p><div class="language-bash line-numbers-mode" data-ext="sh"><pre class="language-bash"><code><span class="token builtin class-name">echo</span> <span class="token string">&#39;export PATH=&quot;/usr/local/opt/bison/bin:$PATH&quot;&#39;</span> <span class="token operator">&gt;&gt;</span> ~/.bash_profile
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div></li><li><p>安装 Boost ：确保安装较新的 Boost 版本。</p><div class="language-bash line-numbers-mode" data-ext="sh"><pre class="language-bash"><code>brew <span class="token function">install</span> boost
brew <span class="token function">link</span> boost
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p>检查 OpenSSL ：确保 openssl 库已安装，默认的 openssl 头文件路径为&quot;/usr/local/opt/openssl/include&quot;</p><p>如果在编译过程中出现找不到 openssl 的错误，尝试添加<code>-Dopenssl.include.dir=&quot;&quot;</code></p></li></ol></li><li><p><strong>Ubuntu 20</strong></p><p>使用以下命令安装所有依赖：</p><div class="language-bash line-numbers-mode" data-ext="sh"><pre class="language-bash"><code><span class="token function">sudo</span> <span class="token function">apt-get</span> <span class="token function">install</span> gcc-9 g++-9 libstdc++-9-dev bison flex libboost-all-dev libssl-dev zlib1g-dev
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div></li><li><p><strong>CentOS 7.x</strong></p><p>使用 yum 命令安装部分依赖。</p><div class="language-bash line-numbers-mode" data-ext="sh"><pre class="language-bash"><code><span class="token function">sudo</span> yum <span class="token function">install</span> bison flex openssl-devel
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>使用 yum 安装的 GCC、Boost 版本过低，在编译时会报错，需自行安装或升级。</p></li>`,3),k=n("p",null,[n("strong",null,"Windows")],-1),m=n("p",null,"构建编译环境",-1),v=n("li",null,"安装 MS Visual Studio（推荐安装 2019 版本）：安装时需要勾选 Visual Studio C/C++ IDE and compiler(supporting CMake, Clang, MinGW)。",-1),b={href:"https://cmake.org/download/",target:"_blank",rel:"noopener noreferrer"},g=n("p",null,"下载安装 Flex、Bison",-1),h={href:"https://sourceforge.net/projects/winflexbison/",target:"_blank",rel:"noopener noreferrer"},y=n("li",null,"下载后需要将可执行文件重命名为 flex.exe 和 bison.exe 以保证编译时能够被找到，添加可执行文件的目录到 PATH 环境变量中。",-1),w=n("p",null,"安装 Boost",-1),f={href:"https://www.boost.org/users/download/",target:"_blank",rel:"noopener noreferrer"},T=n("li",null,"本地编译 Boost ：依次执行 bootstrap.bat 和 b2.exe 。",-1),x=n("p",null,"安装 OpenSSL",-1),_={href:"http://slproweb.com/products/Win32OpenSSL.html",target:"_blank",rel:"noopener noreferrer"},S=o(`<h3 id="执行编译" tabindex="-1"><a class="header-anchor" href="#执行编译" aria-hidden="true">#</a> 执行编译</h3><p>从 git 克隆源代码:</p><div class="language-bash line-numbers-mode" data-ext="sh"><pre class="language-bash"><code><span class="token function">git</span> clone https://github.com/apache/iotdb.git
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>默认的主分支是master分支，如果你想使用某个发布版本，请切换分支 (如 0.13 版本):</p><div class="language-bash line-numbers-mode" data-ext="sh"><pre class="language-bash"><code><span class="token function">git</span> checkout rel/0.13
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>在 IoTDB 根目录下执行 maven 编译:</p><ul><li><p>Mac &amp; Linux</p><div class="language-bash line-numbers-mode" data-ext="sh"><pre class="language-bash"><code>mvn package <span class="token parameter variable">-P</span> compile-cpp <span class="token parameter variable">-pl</span> example/client-cpp-example <span class="token parameter variable">-am</span> <span class="token parameter variable">-DskipTest</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div></li><li><p>Windows</p><div class="language-bash line-numbers-mode" data-ext="sh"><pre class="language-bash"><code>mvn package <span class="token parameter variable">-P</span> compile-cpp <span class="token parameter variable">-pl</span> client-cpp,server,example/client-cpp-example <span class="token parameter variable">-am</span> <span class="token parameter variable">-Dcmake.generator</span><span class="token operator">=</span><span class="token string">&quot;your cmake generator&quot;</span> <span class="token parameter variable">-Dboost.include.dir</span><span class="token operator">=</span><span class="token variable">\${your boost header folder}</span> <span class="token parameter variable">-Dboost.library.dir</span><span class="token operator">=</span><span class="token variable">\${your boost lib (stage) folder}</span> <span class="token parameter variable">-DskipTests</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><ul><li>CMake 根据不同编译平台使用不同的生成器，需添加<code>-Dcmake.generator=&quot;&quot;</code>选项来指定使用的生成器名称，例如： <code>-Dcmake.generator=&quot;Visual Studio 16 2019&quot;</code>。（通过<code>cmake --help</code>命令可以查看 CMake 支持的生成器列表）</li><li>为了帮助 CMake 找到本地安装好的 Boost，在编译命令中需添加相关参数，例如：<code>-DboostIncludeDir=&quot;C:\\Program Files (x86)\\boost_1_78_0&quot; -DboostLibraryDir=&quot;C:\\Program Files (x86)\\boost_1_78_0\\stage\\lib&quot;</code></li></ul></li></ul><p>编译成功后，打包好的 zip 文件位于 <code>client-cpp/target/client-cpp-\${project.version}-cpp-\${os}.zip</code></p><h2 id="基本接口说明" tabindex="-1"><a class="header-anchor" href="#基本接口说明" aria-hidden="true">#</a> 基本接口说明</h2><p>下面将给出 Session 接口的简要介绍和原型定义：</p><h3 id="初始化" tabindex="-1"><a class="header-anchor" href="#初始化" aria-hidden="true">#</a> 初始化</h3><ul><li>开启 Session</li></ul><div class="language-cpp line-numbers-mode" data-ext="cpp"><pre class="language-cpp"><code><span class="token keyword">void</span> <span class="token function">open</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> 
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><ul><li>开启 Session，并决定是否开启 RPC 压缩</li></ul><div class="language-cpp line-numbers-mode" data-ext="cpp"><pre class="language-cpp"><code><span class="token keyword">void</span> <span class="token function">open</span><span class="token punctuation">(</span><span class="token keyword">bool</span> enableRPCCompression<span class="token punctuation">)</span><span class="token punctuation">;</span> 
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>注意: 客户端的 RPC 压缩开启状态需和服务端一致。</p><ul><li>关闭 Session</li></ul><div class="language-cpp line-numbers-mode" data-ext="cpp"><pre class="language-cpp"><code><span class="token keyword">void</span> <span class="token function">close</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> 
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="数据定义接口-ddl" tabindex="-1"><a class="header-anchor" href="#数据定义接口-ddl" aria-hidden="true">#</a> 数据定义接口（DDL）</h3><h4 id="database-管理" tabindex="-1"><a class="header-anchor" href="#database-管理" aria-hidden="true">#</a> Database 管理</h4><ul><li>设置 database</li></ul><div class="language-cpp line-numbers-mode" data-ext="cpp"><pre class="language-cpp"><code><span class="token keyword">void</span> <span class="token function">setStorageGroup</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>storageGroupId<span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><ul><li>删除单个或多个 database</li></ul><div class="language-cpp line-numbers-mode" data-ext="cpp"><pre class="language-cpp"><code><span class="token keyword">void</span> <span class="token function">deleteStorageGroup</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>storageGroup<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">void</span> <span class="token function">deleteStorageGroups</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>string<span class="token operator">&gt;</span> <span class="token operator">&amp;</span>storageGroups<span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="时间序列管理" tabindex="-1"><a class="header-anchor" href="#时间序列管理" aria-hidden="true">#</a> 时间序列管理</h4><ul><li>创建单个或多个非对齐时间序列</li></ul><div class="language-cpp line-numbers-mode" data-ext="cpp"><pre class="language-cpp"><code><span class="token keyword">void</span> <span class="token function">createTimeseries</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>path<span class="token punctuation">,</span> TSDataType<span class="token double-colon punctuation">::</span>TSDataType dataType<span class="token punctuation">,</span> TSEncoding<span class="token double-colon punctuation">::</span>TSEncoding encoding<span class="token punctuation">,</span>
                          CompressionType<span class="token double-colon punctuation">::</span>CompressionType compressor<span class="token punctuation">)</span><span class="token punctuation">;</span>
                          
<span class="token keyword">void</span> <span class="token function">createMultiTimeseries</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>string<span class="token operator">&gt;</span> <span class="token operator">&amp;</span>paths<span class="token punctuation">,</span>
                           <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>TSDataType<span class="token double-colon punctuation">::</span>TSDataType<span class="token operator">&gt;</span> <span class="token operator">&amp;</span>dataTypes<span class="token punctuation">,</span>
                           <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>TSEncoding<span class="token double-colon punctuation">::</span>TSEncoding<span class="token operator">&gt;</span> <span class="token operator">&amp;</span>encodings<span class="token punctuation">,</span>
                           <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>CompressionType<span class="token double-colon punctuation">::</span>CompressionType<span class="token operator">&gt;</span> <span class="token operator">&amp;</span>compressors<span class="token punctuation">,</span>
                           std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>map<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>string<span class="token punctuation">,</span> std<span class="token double-colon punctuation">::</span>string<span class="token operator">&gt;&gt;</span> <span class="token operator">*</span>propsList<span class="token punctuation">,</span>
                           std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>map<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>string<span class="token punctuation">,</span> std<span class="token double-colon punctuation">::</span>string<span class="token operator">&gt;&gt;</span> <span class="token operator">*</span>tagsList<span class="token punctuation">,</span>
                           std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>map<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>string<span class="token punctuation">,</span> std<span class="token double-colon punctuation">::</span>string<span class="token operator">&gt;&gt;</span> <span class="token operator">*</span>attributesList<span class="token punctuation">,</span>
                           std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>string<span class="token operator">&gt;</span> <span class="token operator">*</span>measurementAliasList<span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>创建对齐时间序列</li></ul><div class="language-cpp line-numbers-mode" data-ext="cpp"><pre class="language-cpp"><code><span class="token keyword">void</span> <span class="token function">createAlignedTimeseries</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>deviceId<span class="token punctuation">,</span>
                             <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>string<span class="token operator">&gt;</span> <span class="token operator">&amp;</span>measurements<span class="token punctuation">,</span>
                             <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>TSDataType<span class="token double-colon punctuation">::</span>TSDataType<span class="token operator">&gt;</span> <span class="token operator">&amp;</span>dataTypes<span class="token punctuation">,</span>
                             <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>TSEncoding<span class="token double-colon punctuation">::</span>TSEncoding<span class="token operator">&gt;</span> <span class="token operator">&amp;</span>encodings<span class="token punctuation">,</span>
                             <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>CompressionType<span class="token double-colon punctuation">::</span>CompressionType<span class="token operator">&gt;</span> <span class="token operator">&amp;</span>compressors<span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>删除一个或多个时间序列</li></ul><div class="language-cpp line-numbers-mode" data-ext="cpp"><pre class="language-cpp"><code><span class="token keyword">void</span> <span class="token function">deleteTimeseries</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>path<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">void</span> <span class="token function">deleteTimeseries</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>string<span class="token operator">&gt;</span> <span class="token operator">&amp;</span>paths<span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>检查时间序列是否存在</li></ul><div class="language-cpp line-numbers-mode" data-ext="cpp"><pre class="language-cpp"><code><span class="token keyword">bool</span> <span class="token function">checkTimeseriesExists</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>path<span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="元数据模版" tabindex="-1"><a class="header-anchor" href="#元数据模版" aria-hidden="true">#</a> 元数据模版</h4><ul><li>创建元数据模板</li></ul><div class="language-cpp line-numbers-mode" data-ext="cpp"><pre class="language-cpp"><code><span class="token keyword">void</span> <span class="token function">createSchemaTemplate</span><span class="token punctuation">(</span><span class="token keyword">const</span> Template <span class="token operator">&amp;</span>templ<span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><ul><li>挂载元数据模板</li></ul><div class="language-cpp line-numbers-mode" data-ext="cpp"><pre class="language-cpp"><code><span class="token keyword">void</span> <span class="token function">setSchemaTemplate</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>template_name<span class="token punctuation">,</span> <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>prefix_path<span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>请注意，如果一个子树中有多个孩子节点需要使用模板，可以在其共同父母节点上使用 setSchemaTemplate 。而只有在已有数据点插入模板对应的物理量时，模板才会被设置为激活状态，进而被 show timeseries 等查询检测到。</p><ul><li>卸载元数据模板</li></ul><div class="language-cpp line-numbers-mode" data-ext="cpp"><pre class="language-cpp"><code><span class="token keyword">void</span> <span class="token function">unsetSchemaTemplate</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>prefix_path<span class="token punctuation">,</span> <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>template_name<span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>注意：目前不支持从曾经在<code>prefixPath</code>路径及其后代节点使用模板插入数据后（即使数据已被删除）卸载模板。</p><ul><li>在创建概念元数据模板以后，还可以通过以下接口增加或删除模板内的物理量。请注意，已经挂载的模板不能删除内部的物理量。</li></ul><div class="language-cpp line-numbers-mode" data-ext="cpp"><pre class="language-cpp"><code><span class="token comment">// 为指定模板新增一组对齐的物理量，若其父节点在模板中已经存在，且不要求对齐，则报错</span>
<span class="token keyword">void</span> <span class="token function">addAlignedMeasurementsInTemplate</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>template_name<span class="token punctuation">,</span>
                                      <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>string<span class="token operator">&gt;</span> <span class="token operator">&amp;</span>measurements<span class="token punctuation">,</span>
                                      <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>TSDataType<span class="token double-colon punctuation">::</span>TSDataType<span class="token operator">&gt;</span> <span class="token operator">&amp;</span>dataTypes<span class="token punctuation">,</span>
                                      <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>TSEncoding<span class="token double-colon punctuation">::</span>TSEncoding<span class="token operator">&gt;</span> <span class="token operator">&amp;</span>encodings<span class="token punctuation">,</span>
                                      <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>CompressionType<span class="token double-colon punctuation">::</span>CompressionType<span class="token operator">&gt;</span> <span class="token operator">&amp;</span>compressors<span class="token punctuation">)</span><span class="token punctuation">;</span>

<span class="token comment">// 为指定模板新增一个对齐物理量, 若其父节点在模板中已经存在，且不要求对齐，则报错</span>
<span class="token keyword">void</span> <span class="token function">addAlignedMeasurementsInTemplate</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>template_name<span class="token punctuation">,</span>
                                      <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>measurement<span class="token punctuation">,</span>
                                      TSDataType<span class="token double-colon punctuation">::</span>TSDataType dataType<span class="token punctuation">,</span>
                                      TSEncoding<span class="token double-colon punctuation">::</span>TSEncoding encoding<span class="token punctuation">,</span>
                                      CompressionType<span class="token double-colon punctuation">::</span>CompressionType compressor<span class="token punctuation">)</span><span class="token punctuation">;</span>

<span class="token comment">// 为指定模板新增一个不对齐物理量, 若其父节在模板中已经存在，且要求对齐，则报错</span>
<span class="token keyword">void</span> <span class="token function">addUnalignedMeasurementsInTemplate</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>template_name<span class="token punctuation">,</span>
                                        <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>string<span class="token operator">&gt;</span> <span class="token operator">&amp;</span>measurements<span class="token punctuation">,</span>
                                        <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>TSDataType<span class="token double-colon punctuation">::</span>TSDataType<span class="token operator">&gt;</span> <span class="token operator">&amp;</span>dataTypes<span class="token punctuation">,</span>
                                        <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>TSEncoding<span class="token double-colon punctuation">::</span>TSEncoding<span class="token operator">&gt;</span> <span class="token operator">&amp;</span>encodings<span class="token punctuation">,</span>
                                        <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>CompressionType<span class="token double-colon punctuation">::</span>CompressionType<span class="token operator">&gt;</span> <span class="token operator">&amp;</span>compressors<span class="token punctuation">)</span><span class="token punctuation">;</span>

<span class="token comment">// 为指定模板新增一组不对齐的物理量, 若其父节在模板中已经存在，且要求对齐，则报错</span>
<span class="token keyword">void</span> <span class="token function">addUnalignedMeasurementsInTemplate</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>template_name<span class="token punctuation">,</span>
                                        <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>measurement<span class="token punctuation">,</span>
                                        TSDataType<span class="token double-colon punctuation">::</span>TSDataType dataType<span class="token punctuation">,</span>
                                        TSEncoding<span class="token double-colon punctuation">::</span>TSEncoding encoding<span class="token punctuation">,</span>
                                        CompressionType<span class="token double-colon punctuation">::</span>CompressionType compressor<span class="token punctuation">)</span><span class="token punctuation">;</span>

<span class="token comment">// 从指定模板中删除一个节点及其子树</span>
<span class="token keyword">void</span> <span class="token function">deleteNodeInTemplate</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>template_name<span class="token punctuation">,</span> <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>path<span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>对于已经创建的元数据模板，还可以通过以下接口查询模板信息：</li></ul><div class="language-cpp line-numbers-mode" data-ext="cpp"><pre class="language-cpp"><code><span class="token comment">// 查询返回目前模板中所有物理量的数量</span>
<span class="token keyword">int</span> <span class="token function">countMeasurementsInTemplate</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>template_name<span class="token punctuation">)</span><span class="token punctuation">;</span>

<span class="token comment">// 检查模板内指定路径是否为物理量</span>
<span class="token keyword">bool</span> <span class="token function">isMeasurementInTemplate</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>template_name<span class="token punctuation">,</span> <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>path<span class="token punctuation">)</span><span class="token punctuation">;</span>

<span class="token comment">// 检查在指定模板内是否存在某路径</span>
<span class="token keyword">bool</span> <span class="token function">isPathExistInTemplate</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>template_name<span class="token punctuation">,</span> <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>path<span class="token punctuation">)</span><span class="token punctuation">;</span>

<span class="token comment">// 返回指定模板内所有物理量的路径</span>
std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>string<span class="token operator">&gt;</span> <span class="token function">showMeasurementsInTemplate</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>template_name<span class="token punctuation">)</span><span class="token punctuation">;</span>

<span class="token comment">// 返回指定模板内某前缀路径下的所有物理量的路径</span>
std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>string<span class="token operator">&gt;</span> <span class="token function">showMeasurementsInTemplate</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>template_name<span class="token punctuation">,</span> <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>pattern<span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="数据操作接口-dml" tabindex="-1"><a class="header-anchor" href="#数据操作接口-dml" aria-hidden="true">#</a> 数据操作接口（DML）</h3><h4 id="数据写入" tabindex="-1"><a class="header-anchor" href="#数据写入" aria-hidden="true">#</a> 数据写入</h4><blockquote><p>推荐使用 insertTablet 帮助提高写入效率。</p></blockquote><ul><li>插入一个 Tablet，Tablet 是一个设备若干行数据块，每一行的列都相同。 <ul><li>写入效率高。</li><li>支持写入空值：空值处可以填入任意值，然后通过 BitMap 标记空值。</li></ul></li></ul><div class="language-cpp line-numbers-mode" data-ext="cpp"><pre class="language-cpp"><code><span class="token keyword">void</span> <span class="token function">insertTablet</span><span class="token punctuation">(</span>Tablet <span class="token operator">&amp;</span>tablet<span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><ul><li>插入多个 Tablet</li></ul><div class="language-cpp line-numbers-mode" data-ext="cpp"><pre class="language-cpp"><code><span class="token keyword">void</span> <span class="token function">insertTablets</span><span class="token punctuation">(</span>std<span class="token double-colon punctuation">::</span>unordered_map<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>string<span class="token punctuation">,</span> Tablet <span class="token operator">*</span><span class="token operator">&gt;</span> <span class="token operator">&amp;</span>tablets<span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><ul><li>插入一个 Record，一个 Record 是一个设备一个时间戳下多个测点的数据</li></ul><div class="language-cpp line-numbers-mode" data-ext="cpp"><pre class="language-cpp"><code><span class="token keyword">void</span> <span class="token function">insertRecord</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>deviceId<span class="token punctuation">,</span> <span class="token keyword">int64_t</span> time<span class="token punctuation">,</span> <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>string<span class="token operator">&gt;</span> <span class="token operator">&amp;</span>measurements<span class="token punctuation">,</span>
                  <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>TSDataType<span class="token double-colon punctuation">::</span>TSDataType<span class="token operator">&gt;</span> <span class="token operator">&amp;</span>types<span class="token punctuation">,</span> <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span><span class="token keyword">char</span> <span class="token operator">*</span><span class="token operator">&gt;</span> <span class="token operator">&amp;</span>values<span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>插入多个 Record</li></ul><div class="language-cpp line-numbers-mode" data-ext="cpp"><pre class="language-cpp"><code><span class="token keyword">void</span> <span class="token function">insertRecords</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>string<span class="token operator">&gt;</span> <span class="token operator">&amp;</span>deviceIds<span class="token punctuation">,</span>
                   <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span><span class="token keyword">int64_t</span><span class="token operator">&gt;</span> <span class="token operator">&amp;</span>times<span class="token punctuation">,</span>
                   <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>string<span class="token operator">&gt;&gt;</span> <span class="token operator">&amp;</span>measurementsList<span class="token punctuation">,</span>
                   <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>TSDataType<span class="token double-colon punctuation">::</span>TSDataType<span class="token operator">&gt;&gt;</span> <span class="token operator">&amp;</span>typesList<span class="token punctuation">,</span>
                   <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span><span class="token keyword">char</span> <span class="token operator">*</span><span class="token operator">&gt;&gt;</span> <span class="token operator">&amp;</span>valuesList<span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>插入同属于一个 device 的多个 Record</li></ul><div class="language-cpp line-numbers-mode" data-ext="cpp"><pre class="language-cpp"><code><span class="token keyword">void</span> <span class="token function">insertRecordsOfOneDevice</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>deviceId<span class="token punctuation">,</span>
                              std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span><span class="token keyword">int64_t</span><span class="token operator">&gt;</span> <span class="token operator">&amp;</span>times<span class="token punctuation">,</span>
                              std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>string<span class="token operator">&gt;&gt;</span> <span class="token operator">&amp;</span>measurementsList<span class="token punctuation">,</span>
                              std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>TSDataType<span class="token double-colon punctuation">::</span>TSDataType<span class="token operator">&gt;&gt;</span> <span class="token operator">&amp;</span>typesList<span class="token punctuation">,</span>
                              std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span><span class="token keyword">char</span> <span class="token operator">*</span><span class="token operator">&gt;&gt;</span> <span class="token operator">&amp;</span>valuesList<span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="带有类型推断的写入" tabindex="-1"><a class="header-anchor" href="#带有类型推断的写入" aria-hidden="true">#</a> 带有类型推断的写入</h4><p>服务器需要做类型推断，可能会有额外耗时，速度较无需类型推断的写入慢。</p><div class="language-cpp line-numbers-mode" data-ext="cpp"><pre class="language-cpp"><code><span class="token keyword">void</span> <span class="token function">insertRecord</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>deviceId<span class="token punctuation">,</span> <span class="token keyword">int64_t</span> time<span class="token punctuation">,</span> <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>string<span class="token operator">&gt;</span> <span class="token operator">&amp;</span>measurements<span class="token punctuation">,</span>
                  <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>string<span class="token operator">&gt;</span> <span class="token operator">&amp;</span>values<span class="token punctuation">)</span><span class="token punctuation">;</span>


<span class="token keyword">void</span> <span class="token function">insertRecords</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>string<span class="token operator">&gt;</span> <span class="token operator">&amp;</span>deviceIds<span class="token punctuation">,</span>
                   <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span><span class="token keyword">int64_t</span><span class="token operator">&gt;</span> <span class="token operator">&amp;</span>times<span class="token punctuation">,</span>
                   <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>string<span class="token operator">&gt;&gt;</span> <span class="token operator">&amp;</span>measurementsList<span class="token punctuation">,</span>
                   <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>string<span class="token operator">&gt;&gt;</span> <span class="token operator">&amp;</span>valuesList<span class="token punctuation">)</span><span class="token punctuation">;</span>


<span class="token keyword">void</span> <span class="token function">insertRecordsOfOneDevice</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>deviceId<span class="token punctuation">,</span>
                              std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span><span class="token keyword">int64_t</span><span class="token operator">&gt;</span> <span class="token operator">&amp;</span>times<span class="token punctuation">,</span>
                              std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>string<span class="token operator">&gt;&gt;</span> <span class="token operator">&amp;</span>measurementsList<span class="token punctuation">,</span>
                              <span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>string<span class="token operator">&gt;&gt;</span> <span class="token operator">&amp;</span>valuesList<span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="对齐时间序列写入" tabindex="-1"><a class="header-anchor" href="#对齐时间序列写入" aria-hidden="true">#</a> 对齐时间序列写入</h4><p>对齐时间序列的写入使用 insertAlignedXXX 接口，其余与上述接口类似：</p><ul><li>insertAlignedRecord</li><li>insertAlignedRecords</li><li>insertAlignedRecordsOfOneDevice</li><li>insertAlignedTablet</li><li>insertAlignedTablets</li></ul><h4 id="数据删除" tabindex="-1"><a class="header-anchor" href="#数据删除" aria-hidden="true">#</a> 数据删除</h4><ul><li>删除一个或多个时间序列在某个时间点前或这个时间点的数据</li></ul><div class="language-cpp line-numbers-mode" data-ext="cpp"><pre class="language-cpp"><code><span class="token keyword">void</span> <span class="token function">deleteData</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>path<span class="token punctuation">,</span> <span class="token keyword">int64_t</span> time<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">void</span> <span class="token function">deleteData</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>vector<span class="token operator">&lt;</span>std<span class="token double-colon punctuation">::</span>string<span class="token operator">&gt;</span> <span class="token operator">&amp;</span>deviceId<span class="token punctuation">,</span> <span class="token keyword">int64_t</span> time<span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="iotdb-sql-接口" tabindex="-1"><a class="header-anchor" href="#iotdb-sql-接口" aria-hidden="true">#</a> IoTDB-SQL 接口</h3><ul><li>执行查询语句</li></ul><div class="language-cpp line-numbers-mode" data-ext="cpp"><pre class="language-cpp"><code>unique_ptr<span class="token operator">&lt;</span>SessionDataSet<span class="token operator">&gt;</span> <span class="token function">executeQueryStatement</span><span class="token punctuation">(</span><span class="token keyword">const</span> string <span class="token operator">&amp;</span>sql<span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><ul><li>执行非查询语句</li></ul><div class="language-cpp line-numbers-mode" data-ext="cpp"><pre class="language-cpp"><code><span class="token keyword">void</span> <span class="token function">executeNonQueryStatement</span><span class="token punctuation">(</span><span class="token keyword">const</span> std<span class="token double-colon punctuation">::</span>string <span class="token operator">&amp;</span>sql<span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h2 id="示例代码" tabindex="-1"><a class="header-anchor" href="#示例代码" aria-hidden="true">#</a> 示例代码</h2><p>示例工程源代码：</p><ul><li><code>example/client-cpp-example/src/SessionExample.cpp</code></li><li><code>example/client-cpp-example/src/AlignedTimeseriesSessionExample.cpp</code> （使用对齐时间序列）</li></ul><p>编译成功后，示例代码工程位于 <code>example/client-cpp-example/target</code></p><h2 id="faq" tabindex="-1"><a class="header-anchor" href="#faq" aria-hidden="true">#</a> FAQ</h2><h3 id="thrift-编译相关问题" tabindex="-1"><a class="header-anchor" href="#thrift-编译相关问题" aria-hidden="true">#</a> Thrift 编译相关问题</h3>`,79),D=n("br",null,null,-1),C={href:"https://stackoverflow.com/questions/63592445/ld-unsupported-tapi-file-type-tapi-tbd-in-yaml-file/65518087#65518087",target:"_blank",rel:"noopener noreferrer"},I=n("li",null,[n("p",null,"Windows：Maven 编译 Thrift 时需要使用 wget 下载远端文件，可能出现以下报错："),n("div",{class:"language-text line-numbers-mode","data-ext":"text"},[n("pre",{class:"language-text"},[n("code",null,`Failed to delete cached file C:\\Users\\Administrator\\.m2\\repository\\.cache\\download-maven-plugin\\index.ser
`)]),n("div",{class:"line-numbers","aria-hidden":"true"},[n("div",{class:"line-number"})])]),n("p",null,"解决方法："),n("ul",null,[n("li",null,'尝试删除 ".m2\\repository\\.cache" 目录并重试。'),n("li",null,'在添加 pom 文件对应的 download-maven-plugin 中添加 "<skipCache>true</skipCache>"')])],-1);function L(A,q){const a=p("ExternalLinkIcon");return l(),c("div",null,[i(`

    Licensed to the Apache Software Foundation (ASF) under one
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    regarding copyright ownership.  The ASF licenses this file
    to you under the Apache License, Version 2.0 (the
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    with the License.  You may obtain a copy of the License at
    
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    software distributed under the License is distributed on an
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    KIND, either express or implied.  See the License for the
    specific language governing permissions and limitations
    under the License.

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