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vp-content><!----><div id="markdown-content"><h1 id="c-native-api" tabindex="-1"><a class="header-anchor" href="#c-native-api"><span>C++ Native API</span></a></h1><h2 id="_1-dependencies" tabindex="-1"><a class="header-anchor" href="#_1-dependencies"><span>1. Dependencies</span></a></h2><ul><li>Java 8+</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="_2-installation" tabindex="-1"><a class="header-anchor" href="#_2-installation"><span>2. Installation</span></a></h2><h3 id="_2-1-install-required-dependencies" tabindex="-1"><a class="header-anchor" href="#_2-1-install-required-dependencies"><span>2.1 Install Required Dependencies</span></a></h3><ul><li><p><strong>MAC</strong></p><ol><li><p>Install Bison:</p><p>Use the following brew command to install the Bison version:</p><div class="language-shell line-numbers-mode" data-highlighter="shiki" data-ext="shell" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-shell"><span class="line"><span style="color:#61AFEF;">brew</span><span style="color:#98C379;"> install</span><span style="color:#98C379;"> bison</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div></div></div></li><li><p>Install Boost: Make sure to install the latest version of Boost.</p><div class="language-shell line-numbers-mode" data-highlighter="shiki" data-ext="shell" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-shell"><span class="line"><span style="color:#61AFEF;">brew</span><span style="color:#98C379;"> install</span><span style="color:#98C379;"> boost</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div></div></div></li><li><p>Check OpenSSL: Make sure the OpenSSL library is installed. The default OpenSSL header file path is "/usr/local/opt/openssl/include".</p><p>If you encounter errors related to OpenSSL not being found during compilation, try adding <code>-Dopenssl.include.dir=""</code>.</p></li></ol></li><li><p><strong>Ubuntu 16.04+ or Other Debian-based Systems</strong></p><p>Use the following commands to install dependencies:</p><div class="language-shell line-numbers-mode" data-highlighter="shiki" data-ext="shell" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-shell"><span class="line"><span style="color:#61AFEF;">sudo</span><span style="color:#98C379;"> apt-get</span><span style="color:#98C379;"> update</span></span> |
| <span class="line"><span style="color:#61AFEF;">sudo</span><span style="color:#98C379;"> apt-get</span><span style="color:#98C379;"> install</span><span style="color:#98C379;"> gcc</span><span style="color:#98C379;"> g++</span><span style="color:#98C379;"> bison</span><span style="color:#98C379;"> flex</span><span style="color:#98C379;"> libboost-all-dev</span><span style="color:#98C379;"> libssl-dev</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p><strong>CentOS 7.7+/Fedora/Rocky Linux or Other Red Hat-based Systems</strong></p><p>Use the yum command to install dependencies:</p><div class="language-shell line-numbers-mode" data-highlighter="shiki" data-ext="shell" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-shell"><span class="line"><span style="color:#61AFEF;">sudo</span><span style="color:#98C379;"> yum</span><span style="color:#98C379;"> update</span></span> |
| <span class="line"><span style="color:#61AFEF;">sudo</span><span style="color:#98C379;"> yum</span><span style="color:#98C379;"> install</span><span style="color:#98C379;"> gcc</span><span style="color:#98C379;"> gcc-c++</span><span style="color:#98C379;"> boost-devel</span><span style="color:#98C379;"> bison</span><span style="color:#98C379;"> flex</span><span style="color:#98C379;"> openssl-devel</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div><div class="line-number"></div></div></div></li><li><p><strong>Windows</strong></p><ol><li><p>Set Up the Build Environment</p><ul><li>Install MS Visual Studio (version 2019+ recommended): Make sure to select Visual Studio C/C++ IDE and compiler (supporting CMake, Clang, MinGW) during installation.</li><li>Download and install <a href="https://cmake.org/download/" target="_blank" rel="noopener noreferrer">CMake</a>.</li></ul></li><li><p>Download and Install Flex, Bison</p><ul><li>Download <a href="https://sourceforge.net/projects/winflexbison/" target="_blank" rel="noopener noreferrer">Win_Flex_Bison</a>.</li><li>After downloading, rename the executables to flex.exe and bison.exe to ensure they can be found during compilation, and add the directory of these executables to the PATH environment variable.</li></ul></li><li><p>Install Boost Library</p><ul><li>Download <a href="https://www.boost.org/users/download/" target="_blank" rel="noopener noreferrer">Boost</a>.</li><li>Compile Boost locally: Run <code>bootstrap.bat</code> and <code>b2.exe</code> in sequence.</li><li>Add the Boost installation directory to the PATH environment variable, e.g., <code>C:\Program Files (x86)\boost_1_78_0</code>.</li></ul></li><li><p>Install OpenSSL</p><ul><li>Download and install <a href="http://slproweb.com/products/Win32OpenSSL.html" target="_blank" rel="noopener noreferrer">OpenSSL</a>.</li><li>Add the include directory under the installation directory to the PATH environment variable.</li></ul></li></ol></li></ul><h3 id="_2-2-compilation" tabindex="-1"><a class="header-anchor" href="#_2-2-compilation"><span>2.2 Compilation</span></a></h3><p>Clone the source code from git:</p><div class="language-shell line-numbers-mode" data-highlighter="shiki" data-ext="shell" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-shell"><span class="line"><span style="color:#61AFEF;">git</span><span style="color:#98C379;"> clone</span><span style="color:#98C379;"> https://github.com/apache/iotdb.git</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div></div></div><p>The default main branch is the master branch. If you want to use a specific release version, switch to that branch (e.g., version 2.0.6):</p><div class="language-shell line-numbers-mode" data-highlighter="shiki" data-ext="shell" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-shell"><span class="line"><span style="color:#61AFEF;">git</span><span style="color:#98C379;"> checkout</span><span style="color:#98C379;"> rc/2.0.6</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div></div></div><p>Note: Do not use a newer client to connect to an older server, as this may cause connection failures or unexpected errors.</p><p>Run Maven to compile in the IoTDB root directory:</p><ul><li><p>Mac or Linux with glibc version >= 2.32</p><div class="language-shell line-numbers-mode" data-highlighter="shiki" data-ext="shell" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-shell"><span class="line"><span style="color:#61AFEF;">./mvnw</span><span style="color:#98C379;"> clean</span><span style="color:#98C379;"> package</span><span style="color:#D19A66;"> -pl</span><span style="color:#98C379;"> example/client-cpp-example</span><span style="color:#D19A66;"> -am</span><span style="color:#D19A66;"> -DskipTests</span><span style="color:#D19A66;"> -P</span><span style="color:#98C379;"> with-cpp</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div></div></div></li><li><p>Linux with glibc version >= 2.31</p><div class="language-shell line-numbers-mode" data-highlighter="shiki" data-ext="shell" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-shell"><span class="line"><span style="color:#61AFEF;">./mvnw</span><span style="color:#98C379;"> clean</span><span style="color:#98C379;"> package</span><span style="color:#D19A66;"> -pl</span><span style="color:#98C379;"> example/client-cpp-example</span><span style="color:#D19A66;"> -am</span><span style="color:#D19A66;"> -DskipTests</span><span style="color:#D19A66;"> -P</span><span style="color:#98C379;"> with-cpp</span><span style="color:#D19A66;"> -Diotdb-tools-thrift.version=0.14.1.1-old-glibc-SNAPSHOT</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div></div></div></li><li><p>Linux with glibc version >= 2.17</p><div class="language-shell line-numbers-mode" data-highlighter="shiki" data-ext="shell" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-shell"><span class="line"><span style="color:#61AFEF;">./mvnw</span><span style="color:#98C379;"> clean</span><span style="color:#98C379;"> package</span><span style="color:#D19A66;"> -pl</span><span style="color:#98C379;"> example/client-cpp-example</span><span style="color:#D19A66;"> -am</span><span style="color:#D19A66;"> -DskipTests</span><span style="color:#D19A66;"> -P</span><span style="color:#98C379;"> with-cpp</span><span style="color:#D19A66;"> -Diotdb-tools-thrift.version=0.14.1.1-glibc223-SNAPSHOT</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div></div></div></li><li><p>Windows using Visual Studio 2022</p><div class="language-batch line-numbers-mode" data-highlighter="shiki" data-ext="batch" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-batch"><span class="line"><span style="color:#ABB2BF;">.\mvnw.cmd clean package -pl example/client-cpp-example -am -DskipTests -P with-cpp</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div></div></div></li><li><p>Windows using Visual Studio 2019</p><div class="language-batch line-numbers-mode" data-highlighter="shiki" data-ext="batch" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-batch"><span class="line"><span style="color:#ABB2BF;">.\mvnw.cmd clean package -pl example/client-cpp-example -am -DskipTests -P with-cpp -Dcmake.generator=</span><span style="color:#98C379;">"Visual Studio 16 2019"</span><span style="color:#ABB2BF;"> -Diotdb-tools-thrift.version=0.14.1.1-msvc142-SNAPSHOT</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div></div></div><ul><li>If you haven't added the Boost library path to the PATH environment variable, you need to add the relevant parameters to the compile command, e.g., <code>-DboostIncludeDir="C:\Program Files (x86)\boost_1_78_0" -DboostLibraryDir="C:\Program Files (x86)\boost_1_78_0\stage\lib"</code>.</li></ul></li></ul><p>After successful compilation, the packaged library files will be located in <code>iotdb-client/client-cpp/target</code>, and you can find the compiled example program under <code>example/client-cpp-example/target</code>.</p><h3 id="_2-3-compilation-q-a" tabindex="-1"><a class="header-anchor" href="#_2-3-compilation-q-a"><span>2.3 Compilation Q&A</span></a></h3><p>Q: What are the requirements for the environment on Linux?</p><p>A:</p><ul><li>The known minimum version requirement for glibc (x86_64 version) is 2.17, and the minimum version for GCC is 5.5.</li><li>The known minimum version requirement for glibc (ARM version) is 2.31, and the minimum version for GCC is 10.2.</li><li>If the above requirements are not met, you can try compiling Thrift locally: <ul><li>Download the code from <a href="https://github.com/apache/iotdb-bin-resources/tree/iotdb-tools-thrift-v0.14.1.0/iotdb-tools-thrift" target="_blank" rel="noopener noreferrer">https://github.com/apache/iotdb-bin-resources/tree/iotdb-tools-thrift-v0.14.1.0/iotdb-tools-thrift</a>.</li><li>Run <code>./mvnw clean install</code>.</li><li>Go back to the IoTDB code directory and run <code>./mvnw clean package -pl example/client-cpp-example -am -DskipTests -P with-cpp</code>.</li></ul></li></ul><p>Q: How to resolve the <code>undefined reference to '_libc_single_thread'</code> error during Linux compilation?</p><p>A:</p><ul><li>This issue is caused by the precompiled Thrift dependencies requiring a higher version of glibc.</li><li>You can try adding <code>-Diotdb-tools-thrift.version=0.14.1.1-glibc223-SNAPSHOT</code> or <code>-Diotdb-tools-thrift.version=0.14.1.1-old-glibc-SNAPSHOT</code> to the Maven compile command.</li></ul><p>Q: What if I need to compile using Visual Studio 2017 or earlier on Windows?</p><p>A:</p><ul><li>You can try compiling Thrift locally before compiling the client: <ul><li>Download the code from <a href="https://github.com/apache/iotdb-bin-resources/tree/iotdb-tools-thrift-v0.14.1.0/iotdb-tools-thrift" target="_blank" rel="noopener noreferrer">https://github.com/apache/iotdb-bin-resources/tree/iotdb-tools-thrift-v0.14.1.0/iotdb-tools-thrift</a>.</li><li>Run <code>.\mvnw.cmd clean install</code>.</li><li>Go back to the IoTDB code directory and run <code>.\mvnw.cmd clean package -pl example/client-cpp-example -am -DskipTests -P with-cpp -Dcmake.generator="Visual Studio 15 2017"</code>.</li></ul></li></ul><h2 id="_3-usage" tabindex="-1"><a class="header-anchor" href="#_3-usage"><span>3. Usage</span></a></h2><h3 id="_3-1-tablesession-class" tabindex="-1"><a class="header-anchor" href="#_3-1-tablesession-class"><span>3.1 TableSession Class</span></a></h3><p>All operations in the C++ client are performed through the TableSession class. Below are the method descriptions defined in the TableSession interface.</p><h4 id="_3-1-1-method-list" tabindex="-1"><a class="header-anchor" href="#_3-1-1-method-list"><span>3.1.1 Method List</span></a></h4><ol><li><code>insert(Tablet& tablet, bool sorted = false)</code>: Inserts a Tablet object containing time series data into the database. The sorted parameter indicates whether the rows in the tablet are already sorted by time.</li><li><code>executeNonQueryStatement(string& sql)</code>: Executes non-query SQL statements, such as DDL (Data Definition Language) or DML (Data Manipulation Language) commands.</li><li><code>executeQueryStatement(string& sql)</code>: Executes query SQL statements and returns a SessionDataSet object containing the query results. The optional timeoutInMs parameter indicates the timeout return time. <ul><li>Note: When retrieving rows of query results by calling <code>SessionDataSet::next()</code>, you must store the returned <code>std::shared_ptr<RowRecord></code> object in a local scope variable (e.g.: <code>auto row = dataSet->next();</code>) to ensure the validity of the data lifecycle. If you access it directly via <code>.get()</code> or a raw pointer (e.g., <code>dataSet->next().get()</code>), the reference count of the smart pointer will drop to zero, the data will be released immediately, and subsequent access will lead to undefined behavior.</li></ul></li><li><code>open(bool enableRPCCompression = false)</code>: Opens the connection and determines whether to enable RPC compression (client state must match server state, disabled by default).</li><li><code>close()</code>: Closes the connection.</li></ol><h4 id="_3-1-2-interface-display" tabindex="-1"><a class="header-anchor" href="#_3-1-2-interface-display"><span>3.1.2 Interface Display</span></a></h4><div class="language-cpp line-numbers-mode" data-highlighter="shiki" data-ext="cpp" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-cpp"><span class="line"><span style="color:#C678DD;">class</span><span style="color:#E5C07B;"> TableSession</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"><span style="color:#C678DD;">private:</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> Session</span><span style="color:#C678DD;">*</span><span style="color:#ABB2BF;"> session;</span></span> |
| <span class="line"><span style="color:#C678DD;">public:</span></span> |
| <span class="line"><span style="color:#61AFEF;"> TableSession</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">Session</span><span style="color:#C678DD;">*</span><span style="color:#E06C75;font-style:italic;"> session</span><span style="color:#ABB2BF;">) {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> this</span><span style="color:#ABB2BF;">-></span><span style="color:#E06C75;">session</span><span style="color:#C678DD;"> =</span><span style="color:#ABB2BF;"> session;</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> insert</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">Tablet</span><span style="color:#C678DD;">&</span><span style="color:#E06C75;font-style:italic;"> tablet</span><span style="color:#ABB2BF;">, </span><span style="color:#C678DD;">bool</span><span style="color:#E06C75;font-style:italic;"> sorted</span><span style="color:#C678DD;"> =</span><span style="color:#D19A66;"> false</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> executeNonQueryStatement</span><span style="color:#ABB2BF;">(</span><span style="color:#C678DD;">const</span><span style="color:#ABB2BF;"> std::</span><span style="color:#E5C07B;">string</span><span style="color:#C678DD;">&</span><span style="color:#E06C75;font-style:italic;"> sql</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#E5C07B;"> unique_ptr</span><span style="color:#ABB2BF;"><</span><span style="color:#E5C07B;">SessionDataSet</span><span style="color:#ABB2BF;">> </span><span style="color:#61AFEF;">executeQueryStatement</span><span style="color:#ABB2BF;">(</span><span style="color:#C678DD;">const</span><span style="color:#ABB2BF;"> std::</span><span style="color:#E5C07B;">string</span><span style="color:#C678DD;">&</span><span style="color:#E06C75;font-style:italic;"> sql</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#E5C07B;"> unique_ptr</span><span style="color:#ABB2BF;"><</span><span style="color:#E5C07B;">SessionDataSet</span><span style="color:#ABB2BF;">> </span><span style="color:#61AFEF;">executeQueryStatement</span><span style="color:#ABB2BF;">(</span><span style="color:#C678DD;">const</span><span style="color:#ABB2BF;"> std::</span><span style="color:#E5C07B;">string</span><span style="color:#C678DD;">&</span><span style="color:#E06C75;font-style:italic;"> sql</span><span style="color:#ABB2BF;">, </span><span style="color:#C678DD;">int64_t</span><span style="color:#E06C75;font-style:italic;"> timeoutInMs</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#E5C07B;"> string</span><span style="color:#61AFEF;"> getDatabase</span><span style="color:#ABB2BF;">();</span><span style="color:#7F848E;font-style:italic;"> //Get the currently selected database, can be replaced by executeNonQueryStatement</span></span> |
| <span class="line"><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> open</span><span style="color:#ABB2BF;">(</span><span style="color:#C678DD;">bool</span><span style="color:#E06C75;font-style:italic;"> enableRPCCompression</span><span style="color:#C678DD;"> =</span><span style="color:#D19A66;"> false</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> close</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 class="line-number"></div></div></div><h3 id="_3-2-tablesessionbuilder-class" tabindex="-1"><a class="header-anchor" href="#_3-2-tablesessionbuilder-class"><span>3.2 TableSessionBuilder Class</span></a></h3><p>The TableSessionBuilder class is a builder used to configure and create instances of the TableSession class. Through it, you can conveniently set connection parameters, query parameters, and other settings when creating instances.</p><h4 id="_3-2-1-usage-example" tabindex="-1"><a class="header-anchor" href="#_3-2-1-usage-example"><span>3.2.1 Usage Example</span></a></h4><div class="language-cpp line-numbers-mode" data-highlighter="shiki" data-ext="cpp" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-cpp"><span class="line"><span style="color:#7F848E;font-style:italic;">//Set connection IP, port, username, password</span></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;">//The order of settings is arbitrary, just ensure build() is called last, the created instance is connected by default through open()</span></span> |
| <span class="line"><span style="color:#ABB2BF;">session </span><span style="color:#C678DD;">=</span><span style="color:#ABB2BF;"> (</span><span style="color:#C678DD;">new</span><span style="color:#61AFEF;"> TableSessionBuilder</span><span style="color:#ABB2BF;">())</span></span> |
| <span class="line"><span style="color:#C678DD;"> -></span><span style="color:#61AFEF;">host</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"127.0.0.1"</span><span style="color:#ABB2BF;">)</span></span> |
| <span class="line"><span style="color:#C678DD;"> -></span><span style="color:#61AFEF;">rpcPort</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">6667</span><span style="color:#ABB2BF;">)</span></span> |
| <span class="line"><span style="color:#C678DD;"> -></span><span style="color:#61AFEF;">username</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"root"</span><span style="color:#ABB2BF;">)</span></span> |
| <span class="line"><span style="color:#C678DD;"> -></span><span style="color:#61AFEF;">password</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"root"</span><span style="color:#ABB2BF;">)</span></span> |
| <span class="line"><span style="color:#C678DD;"> -></span><span style="color:#61AFEF;">build</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><h4 id="_3-2-2-configurable-parameter-list" tabindex="-1"><a class="header-anchor" href="#_3-2-2-configurable-parameter-list"><span>3.2.2 Configurable Parameter List</span></a></h4><table><thead><tr><th style="text-align:center;"><strong>Parameter Name</strong></th><th style="text-align:center;"><strong>Description</strong></th><th style="text-align:center;"><strong>Default Value</strong></th></tr></thead><tbody><tr><td style="text-align:center;">host</td><td style="text-align:center;">Set the connected node IP</td><td style="text-align:center;">"127.0.0.1" ("localhost")</td></tr><tr><td style="text-align:center;">rpcPort</td><td style="text-align:center;">Set the connected node port</td><td style="text-align:center;">6667</td></tr><tr><td style="text-align:center;">username</td><td style="text-align:center;">Set the connection username</td><td style="text-align:center;">"root"</td></tr><tr><td style="text-align:center;">password</td><td style="text-align:center;">Set the connection password</td><td style="text-align:center;">"root"</td></tr><tr><td style="text-align:center;">zoneId</td><td style="text-align:center;">Set the ZoneId related to timezone</td><td style="text-align:center;">""</td></tr><tr><td style="text-align:center;">fetchSize</td><td style="text-align:center;">Set the query result fetch size</td><td style="text-align:center;">10000</td></tr><tr><td style="text-align:center;">database</td><td style="text-align:center;">Set the target database name</td><td style="text-align:center;">""</td></tr></tbody></table><h2 id="_4-examples" tabindex="-1"><a class="header-anchor" href="#_4-examples"><span>4. Examples</span></a></h2><p>The sample code of using these interfaces is in:</p><ul><li><code>example/client-cpp-example/src/TableModelSessionExample.cpp</code>: <a href="https://github.com/apache/iotdb/blob/master/example/client-cpp-example/src/TableModelSessionExample.cpp" target="_blank" rel="noopener noreferrer">TableModelSessionExample</a></li></ul><p>If the compilation finishes successfully, the example project will be placed under <code>example/client-cpp-example/target</code></p><div class="language-cpp line-numbers-mode" data-highlighter="shiki" data-ext="cpp" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-cpp"><span class="line"><span style="color:#C678DD;">#include</span><span style="color:#98C379;"> "TableSession.h"</span></span> |
| <span class="line"><span style="color:#C678DD;">#include</span><span style="color:#98C379;"> "TableSessionBuilder.h"</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#C678DD;">using</span><span style="color:#C678DD;"> namespace</span><span style="color:#E5C07B;"> std</span><span style="color:#ABB2BF;">;</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#ABB2BF;">shared_ptr</span><span style="color:#C678DD;"><</span><span style="color:#ABB2BF;">TableSession</span><span style="color:#C678DD;">></span><span style="color:#ABB2BF;"> session;</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#C678DD;">void</span><span style="color:#61AFEF;"> insertRelationalTablet</span><span style="color:#ABB2BF;">() {</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#ABB2BF;"> vector</span><span style="color:#C678DD;"><</span><span style="color:#ABB2BF;">pair</span><span style="color:#C678DD;"><</span><span style="color:#ABB2BF;">string, TSDataType::TSDataType</span><span style="color:#C678DD;">>></span><span style="color:#ABB2BF;"> schemaList {</span></span> |
| <span class="line"><span style="color:#61AFEF;"> make_pair</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"region_id"</span><span style="color:#ABB2BF;">, TSDataType::TEXT),</span></span> |
| <span class="line"><span style="color:#61AFEF;"> make_pair</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"plant_id"</span><span style="color:#ABB2BF;">, TSDataType::TEXT),</span></span> |
| <span class="line"><span style="color:#61AFEF;"> make_pair</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"device_id"</span><span style="color:#ABB2BF;">, TSDataType::TEXT),</span></span> |
| <span class="line"><span style="color:#61AFEF;"> make_pair</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"model"</span><span style="color:#ABB2BF;">, TSDataType::TEXT),</span></span> |
| <span class="line"><span style="color:#61AFEF;"> make_pair</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"temperature"</span><span style="color:#ABB2BF;">, TSDataType::FLOAT),</span></span> |
| <span class="line"><span style="color:#61AFEF;"> make_pair</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"humidity"</span><span style="color:#ABB2BF;">, TSDataType::DOUBLE)</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;"> vector</span><span style="color:#C678DD;"><</span><span style="color:#ABB2BF;">ColumnCategory</span><span style="color:#C678DD;">></span><span style="color:#ABB2BF;"> columnTypes </span><span style="color:#C678DD;">=</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> ColumnCategory::TAG,</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> ColumnCategory::TAG,</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> ColumnCategory::TAG,</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> ColumnCategory::ATTRIBUTE,</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> ColumnCategory::FIELD,</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> ColumnCategory::FIELD</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;"> Tablet </span><span style="color:#61AFEF;">tablet</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"table1"</span><span style="color:#ABB2BF;">, schemaList, columnTypes, </span><span style="color:#D19A66;">100</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> </span></span> |
| <span class="line"><span style="color:#C678DD;"> for</span><span style="color:#ABB2BF;"> (</span><span style="color:#C678DD;">int</span><span style="color:#ABB2BF;"> row </span><span style="color:#C678DD;">=</span><span style="color:#D19A66;"> 0</span><span style="color:#ABB2BF;">; row </span><span style="color:#C678DD;"><</span><span style="color:#D19A66;"> 100</span><span style="color:#ABB2BF;">; row</span><span style="color:#C678DD;">++</span><span style="color:#ABB2BF;">) {</span></span> |
| <span class="line"><span style="color:#C678DD;"> int</span><span style="color:#ABB2BF;"> rowIndex </span><span style="color:#C678DD;">=</span><span style="color:#E5C07B;"> tablet</span><span style="color:#ABB2BF;">.</span><span style="color:#E06C75;">rowSize</span><span style="color:#C678DD;">++</span><span style="color:#ABB2BF;">;</span></span> |
| <span class="line"><span style="color:#E5C07B;"> tablet</span><span style="color:#ABB2BF;">.</span><span style="color:#E06C75;">timestamps</span><span style="color:#ABB2BF;">[rowIndex] </span><span style="color:#C678DD;">=</span><span style="color:#ABB2BF;"> row;</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> </span></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> // Using index-based API is more efficient than column name lookup</span></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> // Prefer: tablet.addValue(0, rowIndex, "1");</span></span> |
| <span class="line"><span style="color:#7F848E;font-style:italic;"> // Avoid: tablet.addValue("region_id", rowIndex, "1");</span></span> |
| <span class="line"><span style="color:#E5C07B;"> tablet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">addValue</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">0</span><span style="color:#ABB2BF;">, rowIndex, </span><span style="color:#98C379;">"1"</span><span style="color:#ABB2BF;">);</span><span style="color:#7F848E;font-style:italic;"> // region_id</span></span> |
| <span class="line"><span style="color:#E5C07B;"> tablet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">addValue</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">1</span><span style="color:#ABB2BF;">, rowIndex, </span><span style="color:#98C379;">"5"</span><span style="color:#ABB2BF;">);</span><span style="color:#7F848E;font-style:italic;"> // plant_id</span></span> |
| <span class="line"><span style="color:#E5C07B;"> tablet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">addValue</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">2</span><span style="color:#ABB2BF;">, rowIndex, </span><span style="color:#98C379;">"3"</span><span style="color:#ABB2BF;">);</span><span style="color:#7F848E;font-style:italic;"> // device_id</span></span> |
| <span class="line"><span style="color:#E5C07B;"> tablet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">addValue</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">3</span><span style="color:#ABB2BF;">, rowIndex, </span><span style="color:#98C379;">"A"</span><span style="color:#ABB2BF;">);</span><span style="color:#7F848E;font-style:italic;"> // model</span></span> |
| <span class="line"><span style="color:#E5C07B;"> tablet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">addValue</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">4</span><span style="color:#ABB2BF;">, rowIndex, </span><span style="color:#D19A66;">37.6</span><span style="color:#E06C75;">F</span><span style="color:#ABB2BF;">);</span><span style="color:#7F848E;font-style:italic;"> // temperature</span></span> |
| <span class="line"><span style="color:#E5C07B;"> tablet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">addValue</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">5</span><span style="color:#ABB2BF;">, rowIndex, </span><span style="color:#D19A66;">111.1</span><span style="color:#ABB2BF;">);</span><span style="color:#7F848E;font-style:italic;"> // humidity</span></span> |
| <span class="line"><span style="color:#C678DD;"> if</span><span style="color:#ABB2BF;"> (</span><span style="color:#E5C07B;">tablet</span><span style="color:#ABB2BF;">.</span><span style="color:#E06C75;">rowSize</span><span style="color:#C678DD;"> ==</span><span style="color:#E5C07B;"> tablet</span><span style="color:#ABB2BF;">.</span><span style="color:#E06C75;">maxRowNumber</span><span style="color:#ABB2BF;">) {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> session</span><span style="color:#ABB2BF;">-></span><span style="color:#61AFEF;">insert</span><span style="color:#ABB2BF;">(tablet);</span></span> |
| <span class="line"><span style="color:#E5C07B;"> 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:#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:#C678DD;"> if</span><span style="color:#ABB2BF;"> (</span><span style="color:#E5C07B;">tablet</span><span style="color:#ABB2BF;">.</span><span style="color:#E06C75;">rowSize</span><span style="color:#C678DD;"> !=</span><span style="color:#D19A66;"> 0</span><span style="color:#ABB2BF;">) {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> session</span><span style="color:#ABB2BF;">-></span><span style="color:#61AFEF;">insert</span><span style="color:#ABB2BF;">(tablet);</span></span> |
| <span class="line"><span style="color:#E5C07B;"> 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:#ABB2BF;"> }</span></span> |
| <span class="line"><span style="color:#ABB2BF;">}</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#C678DD;">void</span><span style="color:#61AFEF;"> Output</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">unique_ptr</span><span style="color:#ABB2BF;"><</span><span style="color:#E5C07B;">SessionDataSet</span><span style="color:#ABB2BF;">> </span><span style="color:#C678DD;">&</span><span style="color:#E06C75;font-style:italic;">dataSet</span><span style="color:#ABB2BF;">) {</span></span> |
| <span class="line"><span style="color:#C678DD;"> for</span><span style="color:#ABB2BF;"> (</span><span style="color:#C678DD;">const</span><span style="color:#ABB2BF;"> string </span><span style="color:#56B6C2;">&</span><span style="color:#ABB2BF;">name: </span><span style="color:#E5C07B;">dataSet</span><span style="color:#ABB2BF;">-></span><span style="color:#61AFEF;">getColumnNames</span><span style="color:#ABB2BF;">()) {</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#ABB2BF;"> name </span><span style="color:#C678DD;"><<</span><span style="color:#98C379;"> " "</span><span style="color:#ABB2BF;">;</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#ABB2BF;"> endl;</span></span> |
| <span class="line"><span style="color:#C678DD;"> while</span><span style="color:#ABB2BF;"> (</span><span style="color:#E5C07B;">dataSet</span><span style="color:#ABB2BF;">-></span><span style="color:#61AFEF;">hasNext</span><span style="color:#ABB2BF;">()) {</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#E5C07B;"> dataSet</span><span style="color:#ABB2BF;">-></span><span style="color:#61AFEF;">next</span><span style="color:#ABB2BF;">()-></span><span style="color:#61AFEF;">toString</span><span style="color:#ABB2BF;">();</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#ABB2BF;"> endl;</span></span> |
| <span class="line"><span style="color:#ABB2BF;">}</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#C678DD;">void</span><span style="color:#61AFEF;"> OutputWithType</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">unique_ptr</span><span style="color:#ABB2BF;"><</span><span style="color:#E5C07B;">SessionDataSet</span><span style="color:#ABB2BF;">> </span><span style="color:#C678DD;">&</span><span style="color:#E06C75;font-style:italic;">dataSet</span><span style="color:#ABB2BF;">) {</span></span> |
| <span class="line"><span style="color:#C678DD;"> for</span><span style="color:#ABB2BF;"> (</span><span style="color:#C678DD;">const</span><span style="color:#ABB2BF;"> string </span><span style="color:#56B6C2;">&</span><span style="color:#ABB2BF;">name: </span><span style="color:#E5C07B;">dataSet</span><span style="color:#ABB2BF;">-></span><span style="color:#61AFEF;">getColumnNames</span><span style="color:#ABB2BF;">()) {</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#ABB2BF;"> name </span><span style="color:#C678DD;"><<</span><span style="color:#98C379;"> " "</span><span style="color:#ABB2BF;">;</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#ABB2BF;"> endl;</span></span> |
| <span class="line"><span style="color:#C678DD;"> for</span><span style="color:#ABB2BF;"> (</span><span style="color:#C678DD;">const</span><span style="color:#ABB2BF;"> string </span><span style="color:#56B6C2;">&</span><span style="color:#ABB2BF;">type: </span><span style="color:#E5C07B;">dataSet</span><span style="color:#ABB2BF;">-></span><span style="color:#61AFEF;">getColumnTypeList</span><span style="color:#ABB2BF;">()) {</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#ABB2BF;"> type </span><span style="color:#C678DD;"><<</span><span style="color:#98C379;"> " "</span><span style="color:#ABB2BF;">;</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#ABB2BF;"> endl;</span></span> |
| <span class="line"><span style="color:#C678DD;"> while</span><span style="color:#ABB2BF;"> (</span><span style="color:#E5C07B;">dataSet</span><span style="color:#ABB2BF;">-></span><span style="color:#61AFEF;">hasNext</span><span style="color:#ABB2BF;">()) {</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#E5C07B;"> dataSet</span><span style="color:#ABB2BF;">-></span><span style="color:#61AFEF;">next</span><span style="color:#ABB2BF;">()-></span><span style="color:#61AFEF;">toString</span><span style="color:#ABB2BF;">();</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#ABB2BF;"> endl;</span></span> |
| <span class="line"><span style="color:#ABB2BF;">}</span></span> |
| <span class="line"></span> |
| <span class="line"><span style="color:#C678DD;">int</span><span style="color:#61AFEF;"> main</span><span style="color:#ABB2BF;">() {</span></span> |
| <span class="line"><span style="color:#C678DD;"> try</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> session </span><span style="color:#C678DD;">=</span><span style="color:#ABB2BF;"> (</span><span style="color:#C678DD;">new</span><span style="color:#61AFEF;"> TableSessionBuilder</span><span style="color:#ABB2BF;">())</span></span> |
| <span class="line"><span style="color:#C678DD;"> -></span><span style="color:#61AFEF;">host</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"127.0.0.1"</span><span style="color:#ABB2BF;">)</span></span> |
| <span class="line"><span style="color:#C678DD;"> -></span><span style="color:#61AFEF;">rpcPort</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">6667</span><span style="color:#ABB2BF;">)</span></span> |
| <span class="line"><span style="color:#C678DD;"> -></span><span style="color:#61AFEF;">username</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"root"</span><span style="color:#ABB2BF;">)</span></span> |
| <span class="line"><span style="color:#C678DD;"> -></span><span style="color:#61AFEF;">password</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"root"</span><span style="color:#ABB2BF;">)</span></span> |
| <span class="line"><span style="color:#C678DD;"> -></span><span style="color:#61AFEF;">build</span><span style="color:#ABB2BF;">();</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> </span></span> |
| <span class="line"><span style="color:#ABB2BF;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#98C379;"> "[Create Database db1,db2]</span><span style="color:#56B6C2;">\n</span><span style="color:#98C379;">"</span><span style="color:#C678DD;"> <<</span><span style="color:#ABB2BF;"> endl;</span></span> |
| <span class="line"><span style="color:#C678DD;"> try</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> session</span><span style="color:#ABB2BF;">-></span><span style="color:#61AFEF;">executeNonQueryStatement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"CREATE DATABASE IF NOT EXISTS db1"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#E5C07B;"> session</span><span style="color:#ABB2BF;">-></span><span style="color:#61AFEF;">executeNonQueryStatement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"CREATE DATABASE IF NOT EXISTS db2"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> } </span><span style="color:#C678DD;">catch</span><span style="color:#ABB2BF;"> (IoTDBException </span><span style="color:#56B6C2;">&</span><span style="color:#ABB2BF;">e) {</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#E5C07B;"> e</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">what</span><span style="color:#ABB2BF;">() </span><span style="color:#C678DD;"><<</span><span style="color:#ABB2BF;"> endl;</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;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#98C379;"> "[Use db1 as database]</span><span style="color:#56B6C2;">\n</span><span style="color:#98C379;">"</span><span style="color:#C678DD;"> <<</span><span style="color:#ABB2BF;"> endl;</span></span> |
| <span class="line"><span style="color:#C678DD;"> try</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> session</span><span style="color:#ABB2BF;">-></span><span style="color:#61AFEF;">executeNonQueryStatement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"USE db1"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> } </span><span style="color:#C678DD;">catch</span><span style="color:#ABB2BF;"> (IoTDBException </span><span style="color:#56B6C2;">&</span><span style="color:#ABB2BF;">e) {</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#E5C07B;"> e</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">what</span><span style="color:#ABB2BF;">() </span><span style="color:#C678DD;"><<</span><span style="color:#ABB2BF;"> endl;</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;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#98C379;"> "[Create Table table1,table2]</span><span style="color:#56B6C2;">\n</span><span style="color:#98C379;">"</span><span style="color:#C678DD;"> <<</span><span style="color:#ABB2BF;"> endl;</span></span> |
| <span class="line"><span style="color:#C678DD;"> try</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> session</span><span style="color:#ABB2BF;">-></span><span style="color:#61AFEF;">executeNonQueryStatement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"create table db1.table1(region_id STRING TAG, plant_id STRING TAG, device_id STRING TAG, model STRING ATTRIBUTE, temperature FLOAT FIELD, humidity DOUBLE FIELD) with (TTL=3600000)"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#E5C07B;"> session</span><span style="color:#ABB2BF;">-></span><span style="color:#61AFEF;">executeNonQueryStatement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"create table db2.table2(region_id STRING TAG, plant_id STRING TAG, color STRING ATTRIBUTE, temperature FLOAT FIELD, speed DOUBLE FIELD) with (TTL=6600000)"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> } </span><span style="color:#C678DD;">catch</span><span style="color:#ABB2BF;"> (IoTDBException </span><span style="color:#56B6C2;">&</span><span style="color:#ABB2BF;">e) {</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#E5C07B;"> e</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">what</span><span style="color:#ABB2BF;">() </span><span style="color:#C678DD;"><<</span><span style="color:#ABB2BF;"> endl;</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;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#98C379;"> "[Show Tables]</span><span style="color:#56B6C2;">\n</span><span style="color:#98C379;">"</span><span style="color:#C678DD;"> <<</span><span style="color:#ABB2BF;"> endl;</span></span> |
| <span class="line"><span style="color:#C678DD;"> try</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> unique_ptr</span><span style="color:#C678DD;"><</span><span style="color:#ABB2BF;">SessionDataSet</span><span style="color:#C678DD;">></span><span style="color:#ABB2BF;"> dataSet </span><span style="color:#C678DD;">=</span><span style="color:#E5C07B;"> session</span><span style="color:#ABB2BF;">-></span><span style="color:#61AFEF;">executeQueryStatement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"SHOW TABLES"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#61AFEF;"> Output</span><span style="color:#ABB2BF;">(dataSet);</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> } </span><span style="color:#C678DD;">catch</span><span style="color:#ABB2BF;"> (IoTDBException </span><span style="color:#56B6C2;">&</span><span style="color:#ABB2BF;">e) {</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#E5C07B;"> e</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">what</span><span style="color:#ABB2BF;">() </span><span style="color:#C678DD;"><<</span><span style="color:#ABB2BF;"> endl;</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;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#98C379;"> "[Show tables from specific database]</span><span style="color:#56B6C2;">\n</span><span style="color:#98C379;">"</span><span style="color:#C678DD;"> <<</span><span style="color:#ABB2BF;"> endl;</span></span> |
| <span class="line"><span style="color:#C678DD;"> try</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> unique_ptr</span><span style="color:#C678DD;"><</span><span style="color:#ABB2BF;">SessionDataSet</span><span style="color:#C678DD;">></span><span style="color:#ABB2BF;"> dataSet </span><span style="color:#C678DD;">=</span><span style="color:#E5C07B;"> session</span><span style="color:#ABB2BF;">-></span><span style="color:#61AFEF;">executeQueryStatement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"SHOW TABLES FROM db1"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#61AFEF;"> Output</span><span style="color:#ABB2BF;">(dataSet);</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> } </span><span style="color:#C678DD;">catch</span><span style="color:#ABB2BF;"> (IoTDBException </span><span style="color:#56B6C2;">&</span><span style="color:#ABB2BF;">e) {</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#E5C07B;"> e</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">what</span><span style="color:#ABB2BF;">() </span><span style="color:#C678DD;"><<</span><span style="color:#ABB2BF;"> endl;</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;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#98C379;"> "[InsertTablet]</span><span style="color:#56B6C2;">\n</span><span style="color:#98C379;">"</span><span style="color:#C678DD;"> <<</span><span style="color:#ABB2BF;"> endl;</span></span> |
| <span class="line"><span style="color:#C678DD;"> try</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"><span style="color:#61AFEF;"> insertRelationalTablet</span><span style="color:#ABB2BF;">();</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> } </span><span style="color:#C678DD;">catch</span><span style="color:#ABB2BF;"> (IoTDBException </span><span style="color:#56B6C2;">&</span><span style="color:#ABB2BF;">e) {</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#E5C07B;"> e</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">what</span><span style="color:#ABB2BF;">() </span><span style="color:#C678DD;"><<</span><span style="color:#ABB2BF;"> endl;</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;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#98C379;"> "[Query Table Data]</span><span style="color:#56B6C2;">\n</span><span style="color:#98C379;">"</span><span style="color:#C678DD;"> <<</span><span style="color:#ABB2BF;"> endl;</span></span> |
| <span class="line"><span style="color:#C678DD;"> try</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> unique_ptr</span><span style="color:#C678DD;"><</span><span style="color:#ABB2BF;">SessionDataSet</span><span style="color:#C678DD;">></span><span style="color:#ABB2BF;"> dataSet </span><span style="color:#C678DD;">=</span><span style="color:#E5C07B;"> session</span><span style="color:#ABB2BF;">-></span><span style="color:#61AFEF;">executeQueryStatement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"SELECT * FROM table1"</span></span> |
| <span class="line"><span style="color:#98C379;"> " where region_id = '1' and plant_id in ('3', '5') and device_id = '3'"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#61AFEF;"> OutputWithType</span><span style="color:#ABB2BF;">(dataSet);</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> } </span><span style="color:#C678DD;">catch</span><span style="color:#ABB2BF;"> (IoTDBException </span><span style="color:#56B6C2;">&</span><span style="color:#ABB2BF;">e) {</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#E5C07B;"> e</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">what</span><span style="color:#ABB2BF;">() </span><span style="color:#C678DD;"><<</span><span style="color:#ABB2BF;"> endl;</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:#E5C07B;"> session</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;"> // specify database in constructor</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> session </span><span style="color:#C678DD;">=</span><span style="color:#ABB2BF;"> (</span><span style="color:#C678DD;">new</span><span style="color:#61AFEF;"> TableSessionBuilder</span><span style="color:#ABB2BF;">())</span></span> |
| <span class="line"><span style="color:#C678DD;"> -></span><span style="color:#61AFEF;">host</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"127.0.0.1"</span><span style="color:#ABB2BF;">)</span></span> |
| <span class="line"><span style="color:#C678DD;"> -></span><span style="color:#61AFEF;">rpcPort</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">6667</span><span style="color:#ABB2BF;">)</span></span> |
| <span class="line"><span style="color:#C678DD;"> -></span><span style="color:#61AFEF;">username</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"root"</span><span style="color:#ABB2BF;">)</span></span> |
| <span class="line"><span style="color:#C678DD;"> -></span><span style="color:#61AFEF;">password</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"root"</span><span style="color:#ABB2BF;">)</span></span> |
| <span class="line"><span style="color:#C678DD;"> -></span><span style="color:#61AFEF;">database</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"db1"</span><span style="color:#ABB2BF;">)</span></span> |
| <span class="line"><span style="color:#C678DD;"> -></span><span style="color:#61AFEF;">build</span><span style="color:#ABB2BF;">();</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> </span></span> |
| <span class="line"><span style="color:#ABB2BF;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#98C379;"> "[Show tables from current database(db1)]</span><span style="color:#56B6C2;">\n</span><span style="color:#98C379;">"</span><span style="color:#C678DD;"> <<</span><span style="color:#ABB2BF;"> endl;</span></span> |
| <span class="line"><span style="color:#C678DD;"> try</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> unique_ptr</span><span style="color:#C678DD;"><</span><span style="color:#ABB2BF;">SessionDataSet</span><span style="color:#C678DD;">></span><span style="color:#ABB2BF;"> dataSet </span><span style="color:#C678DD;">=</span><span style="color:#E5C07B;"> session</span><span style="color:#ABB2BF;">-></span><span style="color:#61AFEF;">executeQueryStatement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"SHOW TABLES"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#61AFEF;"> Output</span><span style="color:#ABB2BF;">(dataSet);</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> } </span><span style="color:#C678DD;">catch</span><span style="color:#ABB2BF;"> (IoTDBException </span><span style="color:#56B6C2;">&</span><span style="color:#ABB2BF;">e) {</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#E5C07B;"> e</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">what</span><span style="color:#ABB2BF;">() </span><span style="color:#C678DD;"><<</span><span style="color:#ABB2BF;"> endl;</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;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#98C379;"> "[Change database to db2]</span><span style="color:#56B6C2;">\n</span><span style="color:#98C379;">"</span><span style="color:#C678DD;"> <<</span><span style="color:#ABB2BF;"> endl;</span></span> |
| <span class="line"><span style="color:#C678DD;"> try</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> session</span><span style="color:#ABB2BF;">-></span><span style="color:#61AFEF;">executeNonQueryStatement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"USE db2"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> } </span><span style="color:#C678DD;">catch</span><span style="color:#ABB2BF;"> (IoTDBException </span><span style="color:#56B6C2;">&</span><span style="color:#ABB2BF;">e) {</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#E5C07B;"> e</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">what</span><span style="color:#ABB2BF;">() </span><span style="color:#C678DD;"><<</span><span style="color:#ABB2BF;"> endl;</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;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#98C379;"> "[Show tables from current database(db2)]</span><span style="color:#56B6C2;">\n</span><span style="color:#98C379;">"</span><span style="color:#C678DD;"> <<</span><span style="color:#ABB2BF;"> endl;</span></span> |
| <span class="line"><span style="color:#C678DD;"> try</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> unique_ptr</span><span style="color:#C678DD;"><</span><span style="color:#ABB2BF;">SessionDataSet</span><span style="color:#C678DD;">></span><span style="color:#ABB2BF;"> dataSet </span><span style="color:#C678DD;">=</span><span style="color:#E5C07B;"> session</span><span style="color:#ABB2BF;">-></span><span style="color:#61AFEF;">executeQueryStatement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"SHOW TABLES"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#61AFEF;"> Output</span><span style="color:#ABB2BF;">(dataSet);</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> } </span><span style="color:#C678DD;">catch</span><span style="color:#ABB2BF;"> (IoTDBException </span><span style="color:#56B6C2;">&</span><span style="color:#ABB2BF;">e) {</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#E5C07B;"> e</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">what</span><span style="color:#ABB2BF;">() </span><span style="color:#C678DD;"><<</span><span style="color:#ABB2BF;"> endl;</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;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#98C379;"> "[Drop Database db1,db2]</span><span style="color:#56B6C2;">\n</span><span style="color:#98C379;">"</span><span style="color:#C678DD;"> <<</span><span style="color:#ABB2BF;"> endl;</span></span> |
| <span class="line"><span style="color:#C678DD;"> try</span><span style="color:#ABB2BF;"> {</span></span> |
| <span class="line"><span style="color:#E5C07B;"> session</span><span style="color:#ABB2BF;">-></span><span style="color:#61AFEF;">executeNonQueryStatement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"DROP DATABASE db1"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#E5C07B;"> session</span><span style="color:#ABB2BF;">-></span><span style="color:#61AFEF;">executeNonQueryStatement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">"DROP DATABASE db2"</span><span style="color:#ABB2BF;">);</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> } </span><span style="color:#C678DD;">catch</span><span style="color:#ABB2BF;"> (IoTDBException </span><span style="color:#56B6C2;">&</span><span style="color:#ABB2BF;">e) {</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#E5C07B;"> e</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">what</span><span style="color:#ABB2BF;">() </span><span style="color:#C678DD;"><<</span><span style="color:#ABB2BF;"> endl;</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;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#98C379;"> "session close</span><span style="color:#56B6C2;">\n</span><span style="color:#98C379;">"</span><span style="color:#C678DD;"> <<</span><span style="color:#ABB2BF;"> endl;</span></span> |
| <span class="line"><span style="color:#E5C07B;"> session</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:#ABB2BF;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#98C379;"> "finished!</span><span style="color:#56B6C2;">\n</span><span style="color:#98C379;">"</span><span style="color:#C678DD;"> <<</span><span style="color:#ABB2BF;"> endl;</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> } </span><span style="color:#C678DD;">catch</span><span style="color:#ABB2BF;"> (IoTDBConnectionException </span><span style="color:#56B6C2;">&</span><span style="color:#ABB2BF;">e) {</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#E5C07B;"> e</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">what</span><span style="color:#ABB2BF;">() </span><span style="color:#C678DD;"><<</span><span style="color:#ABB2BF;"> endl;</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> } </span><span style="color:#C678DD;">catch</span><span style="color:#ABB2BF;"> (IoTDBException </span><span style="color:#56B6C2;">&</span><span style="color:#ABB2BF;">e) {</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> cout </span><span style="color:#C678DD;"><<</span><span style="color:#E5C07B;"> e</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">what</span><span style="color:#ABB2BF;">() </span><span style="color:#C678DD;"><<</span><span style="color:#ABB2BF;"> endl;</span></span> |
| <span class="line"><span style="color:#ABB2BF;"> }</span></span> |
| <span class="line"><span style="color:#C678DD;"> return</span><span style="color:#D19A66;"> 0</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 class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="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 class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="_5-faq" tabindex="-1"><a class="header-anchor" href="#_5-faq"><span>5. FAQ</span></a></h2><h3 id="_5-1-on-mac" tabindex="-1"><a class="header-anchor" href="#_5-1-on-mac"><span>5.1 on Mac</span></a></h3><p>If errors occur when compiling thrift source code, try to downgrade your xcode-commandline from 12 to 11.5</p><p>see <a href="https://stackoverflow.com/questions/63592445/ld-unsupported-tapi-file-type-tapi-tbd-in-yaml-file/65518087#65518087" target="_blank" rel="noopener noreferrer">https://stackoverflow.com/questions/63592445/ld-unsupported-tapi-file-type-tapi-tbd-in-yaml-file/65518087#65518087</a></p><h3 id="_5-2-on-windows" tabindex="-1"><a class="header-anchor" href="#_5-2-on-windows"><span>5.2 on Windows</span></a></h3><p>When Building Thrift and downloading packages via "wget", a possible annoying issue may occur with<br> error message looks like:</p><div class="language-shell line-numbers-mode" data-highlighter="shiki" data-ext="shell" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-shell"><span class="line"><span style="color:#61AFEF;">Failed</span><span style="color:#98C379;"> to</span><span style="color:#98C379;"> delete</span><span style="color:#98C379;"> cached</span><span style="color:#98C379;"> file</span><span style="color:#98C379;"> C:</span><span style="color:#56B6C2;">\U</span><span style="color:#98C379;">sers</span><span style="color:#56B6C2;">\A</span><span style="color:#98C379;">dministrator</span><span style="color:#56B6C2;">\.</span><span style="color:#98C379;">m2</span><span style="color:#56B6C2;">\r</span><span style="color:#98C379;">epository</span><span style="color:#56B6C2;">\.</span><span style="color:#98C379;">cache</span><span style="color:#56B6C2;">\d</span><span style="color:#98C379;">ownload-maven-plugin</span><span style="color:#56B6C2;">\i</span><span style="color:#98C379;">ndex.ser</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div></div></div><p>Possible fixes:</p><ul><li>Try to delete the ".m2\repository\.cache" directory and try again.</li><li>Add "<skipCache>true</skipCache>" configuration to the download-maven-plugin maven phase that complains this error.</li></ul></div><!----><!----><!----></div><footer class="vp-page-meta"><div class="vp-meta-item edit-link"><a class="auto-link external-link vp-meta-label" href="https://github.com/apache/iotdb-docs/edit/main/src/UserGuide/latest-Table/API/Programming-Cpp-Native-API_apache.md" aria-label="Found Error? 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