assets/Programming-Java-Native-API_apache.html-DyAF-Qsv.js - iotdb-website - Git at Google

 import{_ as n,c as a,b as e,o as l}from"./app-pmkzp6TS.js";const t={};function o(p,s){return l(),a("div",null,[...s[0]||(s[0]=[e(`<h1 id="java-native-api" tabindex="-1"><a class="header-anchor" href="#java-native-api"><span>Java Native API</span></a></h1><p>In the native API of IoTDB, the <code>Session</code> is the core interface for interacting with the database. It integrates a rich set of methods that support data writing, querying, and metadata operations. By instantiating a <code>Session</code>, you can establish a connection to the IoTDB server and perform various database operations within the environment constructed by this connection. The <code>Session</code> is not thread-safe and should not be called simultaneously by multiple threads.</p><p><code>SessionPool</code> is a connection pool for <code>Session</code>, and it is recommended to use <code>SessionPool</code> for programming. In scenarios with multi-threaded concurrency, <code>SessionPool</code> can manage and allocate connection resources effectively, thereby improving system performance and resource utilization efficiency.</p><h2 id="_1-overview-of-steps" tabindex="-1"><a class="header-anchor" href="#_1-overview-of-steps"><span>1. Overview of Steps</span></a></h2><ol><li>Create a Connection Pool Instance: Initialize a SessionPool object to manage multiple Session instances.</li><li>Perform Operations: Directly obtain a Session instance from the SessionPool and execute database operations, without the need to open and close connections each time.</li><li>Close Connection Pool Resources: When database operations are no longer needed, close the SessionPool to release all related resources.</li></ol><h2 id="_2-detailed-steps" tabindex="-1"><a class="header-anchor" href="#_2-detailed-steps"><span>2. Detailed Steps</span></a></h2><p>This section provides an overview of the core development process and does not demonstrate all parameters and interfaces. For a complete list of functionalities and parameters, please refer to:<a href="./Programming-Java-Native-API_apache#_3-native-interface-description">Java Native API</a> or check the: <a href="https://github.com/apache/iotdb/tree/rc/2.0.1/example/session/src/main/java/org/apache/iotdb" target="_blank" rel="noopener noreferrer">Source Code</a></p><h3 id="_2-1-create-a-maven-project" tabindex="-1"><a class="header-anchor" href="#_2-1-create-a-maven-project"><span>2.1 Create a Maven Project</span></a></h3><p>Create a Maven project and add the following dependencies to the pom.xml file (JDK &gt;= 1.8, Maven &gt;= 3.6):</p><div class="language-xml line-numbers-mode" data-highlighter="shiki" data-ext="xml" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-xml"><span class="line"><span style="color:#ABB2BF;">&lt;</span><span style="color:#E06C75;">dependencies</span><span style="color:#ABB2BF;">&gt;</span></span>
 <span class="line"><span style="color:#ABB2BF;">    &lt;</span><span style="color:#E06C75;">dependency</span><span style="color:#ABB2BF;">&gt;</span></span>
 <span class="line"><span style="color:#ABB2BF;">      &lt;</span><span style="color:#E06C75;">groupId</span><span style="color:#ABB2BF;">&gt;org.apache.iotdb&lt;/</span><span style="color:#E06C75;">groupId</span><span style="color:#ABB2BF;">&gt;</span></span>
 <span class="line"><span style="color:#ABB2BF;">      &lt;</span><span style="color:#E06C75;">artifactId</span><span style="color:#ABB2BF;">&gt;iotdb-session&lt;/</span><span style="color:#E06C75;">artifactId</span><span style="color:#ABB2BF;">&gt;</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">      &lt;!-- The version number is the same as the database version number --&gt;</span></span>
 <span class="line"><span style="color:#ABB2BF;">      &lt;</span><span style="color:#E06C75;">version</span><span style="color:#ABB2BF;">&gt;\${project.version}&lt;/</span><span style="color:#E06C75;">version</span><span style="color:#ABB2BF;">&gt;</span></span>
 <span class="line"><span style="color:#ABB2BF;">    &lt;/</span><span style="color:#E06C75;">dependency</span><span style="color:#ABB2BF;">&gt;</span></span>
 <span class="line"><span style="color:#ABB2BF;">&lt;/</span><span style="color:#E06C75;">dependencies</span><span style="color:#ABB2BF;">&gt;</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><p>Note: Do not use a newer client to connect to an older server, as this may cause connection failures or unexpected errors.</p><h3 id="_2-2-creating-a-connection-pool-instance" tabindex="-1"><a class="header-anchor" href="#_2-2-creating-a-connection-pool-instance"><span>2.2 Creating a Connection Pool Instance</span></a></h3><div class="language-java line-numbers-mode" data-highlighter="shiki" data-ext="java" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-java"><span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> java.util.ArrayList</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> java.util.List</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.iotdb.session.pool.SessionPool</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">public</span><span style="color:#C678DD;"> class</span><span style="color:#E5C07B;"> IoTDBSessionPoolExample</span><span style="color:#ABB2BF;"> {</span></span>
 <span class="line"><span style="color:#C678DD;">    private</span><span style="color:#C678DD;"> static</span><span style="color:#E5C07B;"> SessionPool</span><span style="color:#E06C75;"> sessionPool</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">    public</span><span style="color:#C678DD;"> static</span><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> main</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">String</span><span style="color:#ABB2BF;">[] </span><span style="color:#E06C75;font-style:italic;">args</span><span style="color:#ABB2BF;">)</span><span style="color:#ABB2BF;"> {</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">        // Using nodeUrls ensures that when one node goes down, other nodes are automatically connected to retry</span></span>
 <span class="line"><span style="color:#E5C07B;">        List</span><span style="color:#ABB2BF;">&lt;</span><span style="color:#E5C07B;">String</span><span style="color:#ABB2BF;">&gt; </span><span style="color:#E06C75;">nodeUrls</span><span style="color:#56B6C2;"> =</span><span style="color:#C678DD;"> new</span><span style="color:#E5C07B;"> ArrayList</span><span style="color:#ABB2BF;">&lt;&gt;();</span></span>
 <span class="line"><span style="color:#E5C07B;">        nodeUrls</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">add</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;127.0.0.1:6667&quot;</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"><span style="color:#E5C07B;">        nodeUrls</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">add</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;127.0.0.1:6668&quot;</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"><span style="color:#ABB2BF;">        sessionPool </span><span style="color:#56B6C2;">=</span></span>
 <span class="line"><span style="color:#C678DD;">                new</span><span style="color:#ABB2BF;"> SessionPool.</span><span style="color:#61AFEF;">Builder</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"><span style="color:#ABB2BF;">                        .</span><span style="color:#61AFEF;">nodeUrls</span><span style="color:#ABB2BF;">(nodeUrls)</span></span>
 <span class="line"><span style="color:#ABB2BF;">                        .</span><span style="color:#61AFEF;">user</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root&quot;</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#ABB2BF;">                        .</span><span style="color:#61AFEF;">password</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root&quot;</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#ABB2BF;">                        .</span><span style="color:#61AFEF;">maxSize</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">3</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#ABB2BF;">                        .</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;">}</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></div><h3 id="_2-3-performing-database-operations" tabindex="-1"><a class="header-anchor" href="#_2-3-performing-database-operations"><span>2.3 Performing Database Operations</span></a></h3><h4 id="_2-3-1-data-insertion" tabindex="-1"><a class="header-anchor" href="#_2-3-1-data-insertion"><span>2.3.1 Data Insertion</span></a></h4><p>In industrial scenarios, data insertion can be categorized into the following types: inserting multiple rows of data, and inserting multiple rows of data for a single device. Below, we introduce the insertion interfaces for different scenarios.</p><h5 id="multi-row-data-insertion-interface" tabindex="-1"><a class="header-anchor" href="#multi-row-data-insertion-interface"><span>Multi-Row Data Insertion Interface</span></a></h5><p>Interface Description: Supports inserting multiple rows of data at once, where each row corresponds to multiple measurement values for a device at a specific timestamp.</p><p>Interface List:</p><table><thead><tr><th><strong>Interface Name</strong></th><th><strong>Function Description</strong></th></tr></thead><tbody><tr><td><code>insertRecords(List&lt;String&gt; deviceIds, List&lt;Long&gt; times, List&lt;List&lt;String&gt;&gt; measurementsList, List&lt;List&lt;TSDataType&gt;&gt; typesList, List&lt;List&lt;Object&gt;&gt; valuesList)</code></td><td>Inserts multiple rows of data, suitable for scenarios where measurements are independently collected.</td></tr></tbody></table><p>Code Example:</p><div class="language-java line-numbers-mode" data-highlighter="shiki" data-ext="java" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-java"><span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> java.util.ArrayList</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> java.util.List</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.iotdb.rpc.IoTDBConnectionException</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.iotdb.rpc.StatementExecutionException</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.iotdb.session.pool.SessionPool</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.tsfile.enums.TSDataType</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">public</span><span style="color:#C678DD;"> class</span><span style="color:#E5C07B;"> SessionPoolExample</span><span style="color:#ABB2BF;"> {</span></span>
 <span class="line"><span style="color:#C678DD;"> private</span><span style="color:#C678DD;"> static</span><span style="color:#E5C07B;"> SessionPool</span><span style="color:#E06C75;"> sessionPool</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">     public</span><span style="color:#C678DD;"> static</span><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> main</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">String</span><span style="color:#ABB2BF;">[] </span><span style="color:#E06C75;font-style:italic;">args</span><span style="color:#ABB2BF;">)</span><span style="color:#C678DD;"> throws</span><span style="color:#E5C07B;"> IoTDBConnectionException</span><span style="color:#ABB2BF;">,</span><span style="color:#E5C07B;"> StatementExecutionException</span><span style="color:#ABB2BF;"> {</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">          // 1. init SessionPool</span></span>
 <span class="line"><span style="color:#61AFEF;">        constructSessionPool</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">          // 2. execute insert data</span></span>
 <span class="line"><span style="color:#61AFEF;">        insertRecordsExample</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">          // 3. close SessionPool</span></span>
 <span class="line"><span style="color:#61AFEF;">        closeSessionPool</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#ABB2BF;">  }</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">  private</span><span style="color:#C678DD;"> static</span><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> constructSessionPool</span><span style="color:#ABB2BF;">()</span><span style="color:#ABB2BF;"> {</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">        // Using nodeUrls ensures that when one node goes down, other nodes are automatically connected to retry</span></span>
 <span class="line"><span style="color:#E5C07B;">        List</span><span style="color:#ABB2BF;">&lt;</span><span style="color:#E5C07B;">String</span><span style="color:#ABB2BF;">&gt; </span><span style="color:#E06C75;">nodeUrls</span><span style="color:#56B6C2;"> =</span><span style="color:#C678DD;"> new</span><span style="color:#E5C07B;"> ArrayList</span><span style="color:#ABB2BF;">&lt;&gt;();</span></span>
 <span class="line"><span style="color:#E5C07B;">        nodeUrls</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">add</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;127.0.0.1:6667&quot;</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"><span style="color:#E5C07B;">        nodeUrls</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">add</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;127.0.0.1:6668&quot;</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"><span style="color:#ABB2BF;">        sessionPool </span><span style="color:#56B6C2;">=</span></span>
 <span class="line"><span style="color:#C678DD;">                new</span><span style="color:#ABB2BF;"> SessionPool.</span><span style="color:#61AFEF;">Builder</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"><span style="color:#ABB2BF;">                        .</span><span style="color:#61AFEF;">nodeUrls</span><span style="color:#ABB2BF;">(nodeUrls)</span></span>
 <span class="line"><span style="color:#ABB2BF;">                        .</span><span style="color:#61AFEF;">user</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root&quot;</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#ABB2BF;">                        .</span><span style="color:#61AFEF;">password</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root&quot;</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#ABB2BF;">                        .</span><span style="color:#61AFEF;">maxSize</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">3</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#ABB2BF;">                        .</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>
 <span class="line"><span style="color:#C678DD;">    public</span><span style="color:#C678DD;"> static</span><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> insertRecordsExample</span><span style="color:#ABB2BF;">()</span><span style="color:#C678DD;"> throws</span><span style="color:#E5C07B;"> IoTDBConnectionException</span><span style="color:#ABB2BF;">,</span><span style="color:#E5C07B;"> StatementExecutionException</span><span style="color:#ABB2BF;"> {</span></span>
 <span class="line"><span style="color:#E5C07B;">        String</span><span style="color:#E06C75;"> deviceId</span><span style="color:#56B6C2;"> =</span><span style="color:#98C379;"> &quot;root.sg1.d1&quot;</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#E5C07B;">        List</span><span style="color:#ABB2BF;">&lt;</span><span style="color:#E5C07B;">String</span><span style="color:#ABB2BF;">&gt; </span><span style="color:#E06C75;">measurements</span><span style="color:#56B6C2;"> =</span><span style="color:#C678DD;"> new</span><span style="color:#E5C07B;"> ArrayList</span><span style="color:#ABB2BF;">&lt;&gt;();</span></span>
 <span class="line"><span style="color:#E5C07B;">        measurements</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">add</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;s1&quot;</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"><span style="color:#E5C07B;">        measurements</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">add</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;s2&quot;</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"><span style="color:#E5C07B;">        measurements</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">add</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;s3&quot;</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"><span style="color:#E5C07B;">        List</span><span style="color:#ABB2BF;">&lt;</span><span style="color:#E5C07B;">String</span><span style="color:#ABB2BF;">&gt; </span><span style="color:#E06C75;">deviceIds</span><span style="color:#56B6C2;"> =</span><span style="color:#C678DD;"> new</span><span style="color:#E5C07B;"> ArrayList</span><span style="color:#ABB2BF;">&lt;&gt;();</span></span>
 <span class="line"><span style="color:#E5C07B;">        List</span><span style="color:#ABB2BF;">&lt;</span><span style="color:#E5C07B;">List</span><span style="color:#ABB2BF;">&lt;</span><span style="color:#E5C07B;">String</span><span style="color:#ABB2BF;">&gt;&gt; </span><span style="color:#E06C75;">measurementsList</span><span style="color:#56B6C2;"> =</span><span style="color:#C678DD;"> new</span><span style="color:#E5C07B;"> ArrayList</span><span style="color:#ABB2BF;">&lt;&gt;();</span></span>
 <span class="line"><span style="color:#E5C07B;">        List</span><span style="color:#ABB2BF;">&lt;</span><span style="color:#E5C07B;">List</span><span style="color:#ABB2BF;">&lt;</span><span style="color:#E5C07B;">Object</span><span style="color:#ABB2BF;">&gt;&gt; </span><span style="color:#E06C75;">valuesList</span><span style="color:#56B6C2;"> =</span><span style="color:#C678DD;"> new</span><span style="color:#E5C07B;"> ArrayList</span><span style="color:#ABB2BF;">&lt;&gt;();</span></span>
 <span class="line"><span style="color:#E5C07B;">        List</span><span style="color:#ABB2BF;">&lt;</span><span style="color:#E5C07B;">Long</span><span style="color:#ABB2BF;">&gt; </span><span style="color:#E06C75;">timestamps</span><span style="color:#56B6C2;"> =</span><span style="color:#C678DD;"> new</span><span style="color:#E5C07B;"> ArrayList</span><span style="color:#ABB2BF;">&lt;&gt;();</span></span>
 <span class="line"><span style="color:#E5C07B;">        List</span><span style="color:#ABB2BF;">&lt;</span><span style="color:#E5C07B;">List</span><span style="color:#ABB2BF;">&lt;</span><span style="color:#E5C07B;">TSDataType</span><span style="color:#ABB2BF;">&gt;&gt; </span><span style="color:#E06C75;">typesList</span><span style="color:#56B6C2;"> =</span><span style="color:#C678DD;"> new</span><span style="color:#E5C07B;"> ArrayList</span><span style="color:#ABB2BF;">&lt;&gt;();</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">        for</span><span style="color:#ABB2BF;"> (</span><span style="color:#C678DD;">long</span><span style="color:#E06C75;"> time</span><span style="color:#56B6C2;"> =</span><span style="color:#D19A66;"> 0</span><span style="color:#ABB2BF;">; time </span><span style="color:#56B6C2;">&lt;</span><span style="color:#D19A66;"> 500</span><span style="color:#ABB2BF;">; time++) {</span></span>
 <span class="line"><span style="color:#E5C07B;">            List</span><span style="color:#ABB2BF;">&lt;</span><span style="color:#E5C07B;">Object</span><span style="color:#ABB2BF;">&gt; </span><span style="color:#E06C75;">values</span><span style="color:#56B6C2;"> =</span><span style="color:#C678DD;"> new</span><span style="color:#E5C07B;"> ArrayList</span><span style="color:#ABB2BF;">&lt;&gt;();</span></span>
 <span class="line"><span style="color:#E5C07B;">            List</span><span style="color:#ABB2BF;">&lt;</span><span style="color:#E5C07B;">TSDataType</span><span style="color:#ABB2BF;">&gt; </span><span style="color:#E06C75;">types</span><span style="color:#56B6C2;"> =</span><span style="color:#C678DD;"> new</span><span style="color:#E5C07B;"> ArrayList</span><span style="color:#ABB2BF;">&lt;&gt;();</span></span>
 <span class="line"><span style="color:#E5C07B;">            values</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">add</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">1L</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"><span style="color:#E5C07B;">            values</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">add</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">2L</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"><span style="color:#E5C07B;">            values</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">add</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">3L</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"><span style="color:#E5C07B;">            types</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">add</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">TSDataType</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">INT64</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"><span style="color:#E5C07B;">            types</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">add</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">TSDataType</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">INT64</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"><span style="color:#E5C07B;">            types</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">add</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">TSDataType</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">INT64</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#E5C07B;">            deviceIds</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">add</span><span style="color:#ABB2BF;">(deviceId);</span></span>
 <span class="line"><span style="color:#E5C07B;">            measurementsList</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">add</span><span style="color:#ABB2BF;">(measurements);</span></span>
 <span class="line"><span style="color:#E5C07B;">            valuesList</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">add</span><span style="color:#ABB2BF;">(values);</span></span>
 <span class="line"><span style="color:#E5C07B;">            typesList</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">add</span><span style="color:#ABB2BF;">(types);</span></span>
 <span class="line"><span style="color:#E5C07B;">            timestamps</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">add</span><span style="color:#ABB2BF;">(time);</span></span>
 <span class="line"><span style="color:#C678DD;">            if</span><span style="color:#ABB2BF;"> (time </span><span style="color:#56B6C2;">!=</span><span style="color:#D19A66;"> 0</span><span style="color:#56B6C2;"> &amp;&amp;</span><span style="color:#ABB2BF;"> time </span><span style="color:#56B6C2;">%</span><span style="color:#D19A66;"> 100</span><span style="color:#56B6C2;"> ==</span><span style="color:#D19A66;"> 0</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:#E5C07B;">                    sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">insertRecords</span><span style="color:#ABB2BF;">(deviceIds, timestamps, measurementsList, typesList, valuesList);</span></span>
 <span class="line"><span style="color:#ABB2BF;">                } </span><span style="color:#C678DD;">catch</span><span style="color:#ABB2BF;"> (</span><span style="color:#E5C07B;">IoTDBConnectionException</span><span style="color:#ABB2BF;"> | </span><span style="color:#E5C07B;">StatementExecutionException</span><span style="color:#E06C75;font-style:italic;"> e</span><span style="color:#ABB2BF;">) {</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">                    // solve exception</span></span>
 <span class="line"><span style="color:#ABB2BF;">                }</span></span>
 <span class="line"><span style="color:#E5C07B;">                deviceIds</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">clear</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#E5C07B;">                measurementsList</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">clear</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#E5C07B;">                valuesList</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">clear</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#E5C07B;">                typesList</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">clear</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#E5C07B;">                timestamps</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">clear</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:#C678DD;">        try</span><span style="color:#ABB2BF;"> {</span></span>
 <span class="line"><span style="color:#E5C07B;">            sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">insertRecords</span><span style="color:#ABB2BF;">(deviceIds, timestamps, measurementsList, typesList, valuesList);</span></span>
 <span class="line"><span style="color:#ABB2BF;">        } </span><span style="color:#C678DD;">catch</span><span style="color:#ABB2BF;"> (</span><span style="color:#E5C07B;">IoTDBConnectionException</span><span style="color:#ABB2BF;"> | </span><span style="color:#E5C07B;">StatementExecutionException</span><span style="color:#E06C75;font-style:italic;"> e</span><span style="color:#ABB2BF;">) {</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">            // solve exception</span></span>
 <span class="line"><span style="color:#ABB2BF;">        }</span></span>
 <span class="line"><span style="color:#ABB2BF;">    }</span></span>
 <span class="line"><span style="color:#E06C75;">    </span></span>
 <span class="line"><span style="color:#C678DD;">      public</span><span style="color:#C678DD;"> static</span><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> closeSessionPool</span><span style="color:#ABB2BF;">(){</span></span>
 <span class="line"><span style="color:#E5C07B;">        sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">close</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#ABB2BF;">    }</span></span>
 <span class="line"><span style="color:#ABB2BF;">}</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h5 id="single-device-multi-row-data-insertion-interface" tabindex="-1"><a class="header-anchor" href="#single-device-multi-row-data-insertion-interface"><span>Single-Device Multi-Row Data Insertion Interface</span></a></h5><p>Interface Description: Supports inserting multiple rows of data for a single device at once, where each row corresponds to multiple measurement values for a specific timestamp.</p><p>Interface List：</p><table><thead><tr><th><strong>Interface Name</strong></th><th><strong>Function Description</strong></th></tr></thead><tbody><tr><td><code>insertTablet(Tablet tablet)</code></td><td>Inserts multiple rows of data for a single device, suitable for scenarios where measurements are independently collected.</td></tr></tbody></table><p>Code Example:</p><div class="language-java line-numbers-mode" data-highlighter="shiki" data-ext="java" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-java"><span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> java.util.ArrayList</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> java.util.List</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> java.util.Random</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.iotdb.rpc.IoTDBConnectionException</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.iotdb.rpc.StatementExecutionException</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.iotdb.session.pool.SessionPool</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.tsfile.enums.TSDataType</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.tsfile.write.record.Tablet</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.tsfile.write.schema.IMeasurementSchema</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.tsfile.write.schema.MeasurementSchema</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">public</span><span style="color:#C678DD;"> class</span><span style="color:#E5C07B;"> SessionPoolExample</span><span style="color:#ABB2BF;"> {</span></span>
 <span class="line"><span style="color:#C678DD;">    private</span><span style="color:#C678DD;"> static</span><span style="color:#E5C07B;"> SessionPool</span><span style="color:#E06C75;"> sessionPool</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">    public</span><span style="color:#C678DD;"> static</span><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> main</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">String</span><span style="color:#ABB2BF;">[] </span><span style="color:#E06C75;font-style:italic;">args</span><span style="color:#ABB2BF;">)</span><span style="color:#C678DD;"> throws</span><span style="color:#E5C07B;"> IoTDBConnectionException</span><span style="color:#ABB2BF;">,</span><span style="color:#E5C07B;"> StatementExecutionException</span><span style="color:#ABB2BF;"> {</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">        // 1. init SessionPool</span></span>
 <span class="line"><span style="color:#61AFEF;">        constructSessionPool</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">        // 2. execute insert data</span></span>
 <span class="line"><span style="color:#61AFEF;">        insertTabletExample</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">        // 3. close SessionPool</span></span>
 <span class="line"><span style="color:#61AFEF;">        closeSessionPool</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#ABB2BF;">    }</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">    private</span><span style="color:#C678DD;"> static</span><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> constructSessionPool</span><span style="color:#ABB2BF;">()</span><span style="color:#ABB2BF;"> {</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">        // Using nodeUrls ensures that when one node goes down, other nodes are automatically connected to retry</span></span>
 <span class="line"><span style="color:#E5C07B;">        List</span><span style="color:#ABB2BF;">&lt;</span><span style="color:#E5C07B;">String</span><span style="color:#ABB2BF;">&gt; </span><span style="color:#E06C75;">nodeUrls</span><span style="color:#56B6C2;"> =</span><span style="color:#C678DD;"> new</span><span style="color:#E5C07B;"> ArrayList</span><span style="color:#ABB2BF;">&lt;&gt;();</span></span>
 <span class="line"><span style="color:#E5C07B;">        nodeUrls</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">add</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;127.0.0.1:6667&quot;</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">        //nodeUrls.add(&quot;127.0.0.1:6668&quot;);</span></span>
 <span class="line"><span style="color:#ABB2BF;">        sessionPool </span><span style="color:#56B6C2;">=</span></span>
 <span class="line"><span style="color:#C678DD;">                new</span><span style="color:#ABB2BF;"> SessionPool.</span><span style="color:#61AFEF;">Builder</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"><span style="color:#ABB2BF;">                        .</span><span style="color:#61AFEF;">nodeUrls</span><span style="color:#ABB2BF;">(nodeUrls)</span></span>
 <span class="line"><span style="color:#ABB2BF;">                        .</span><span style="color:#61AFEF;">user</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root&quot;</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#ABB2BF;">                        .</span><span style="color:#61AFEF;">password</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root&quot;</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#ABB2BF;">                        .</span><span style="color:#61AFEF;">maxSize</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">3</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#ABB2BF;">                        .</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>
 <span class="line"><span style="color:#C678DD;">    private</span><span style="color:#C678DD;"> static</span><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> insertTabletExample</span><span style="color:#ABB2BF;">()</span><span style="color:#C678DD;"> throws</span><span style="color:#E5C07B;"> IoTDBConnectionException</span><span style="color:#ABB2BF;">,</span><span style="color:#E5C07B;"> StatementExecutionException</span><span style="color:#ABB2BF;"> {</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">        /*</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">         * A Tablet example:</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">         *      device1</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">         * time s1, s2, s3</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">         * 1,   1,  1,  1</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">         * 2,   2,  2,  2</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">         * 3,   3,  3,  3</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">         */</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">        // The schema of measurements of one device</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">        // only measurementId and data type in MeasurementSchema take effects in Tablet</span></span>
 <span class="line"><span style="color:#E5C07B;">        List</span><span style="color:#ABB2BF;">&lt;</span><span style="color:#E5C07B;">IMeasurementSchema</span><span style="color:#ABB2BF;">&gt; </span><span style="color:#E06C75;">schemaList</span><span style="color:#56B6C2;"> =</span><span style="color:#C678DD;"> new</span><span style="color:#E5C07B;"> ArrayList</span><span style="color:#ABB2BF;">&lt;&gt;();</span></span>
 <span class="line"><span style="color:#E5C07B;">        schemaList</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">add</span><span style="color:#ABB2BF;">(</span><span style="color:#C678DD;">new</span><span style="color:#61AFEF;"> MeasurementSchema</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;s1&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#E5C07B;">TSDataType</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">INT64</span><span style="color:#ABB2BF;">));</span></span>
 <span class="line"><span style="color:#E5C07B;">        schemaList</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">add</span><span style="color:#ABB2BF;">(</span><span style="color:#C678DD;">new</span><span style="color:#61AFEF;"> MeasurementSchema</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;s2&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#E5C07B;">TSDataType</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">INT64</span><span style="color:#ABB2BF;">));</span></span>
 <span class="line"><span style="color:#E5C07B;">        schemaList</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">add</span><span style="color:#ABB2BF;">(</span><span style="color:#C678DD;">new</span><span style="color:#61AFEF;"> MeasurementSchema</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;s3&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#E5C07B;">TSDataType</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">INT64</span><span style="color:#ABB2BF;">));</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#E5C07B;">        Tablet</span><span style="color:#E06C75;"> tablet</span><span style="color:#56B6C2;"> =</span><span style="color:#C678DD;"> new</span><span style="color:#61AFEF;"> Tablet</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg.d1&quot;</span><span style="color:#ABB2BF;">,schemaList,</span><span style="color:#D19A66;">100</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">        // Method 1 to add tablet data</span></span>
 <span class="line"><span style="color:#C678DD;">        long</span><span style="color:#E06C75;"> timestamp</span><span style="color:#56B6C2;"> =</span><span style="color:#E5C07B;"> System</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">currentTimeMillis</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#E5C07B;">        Random</span><span style="color:#E06C75;"> random</span><span style="color:#56B6C2;"> =</span><span style="color:#C678DD;"> new</span><span style="color:#61AFEF;"> Random</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;">long</span><span style="color:#E06C75;"> row</span><span style="color:#56B6C2;"> =</span><span style="color:#D19A66;"> 0</span><span style="color:#ABB2BF;">; row </span><span style="color:#56B6C2;">&lt;</span><span style="color:#D19A66;"> 100</span><span style="color:#ABB2BF;">; row++) {</span></span>
 <span class="line"><span style="color:#C678DD;">            int</span><span style="color:#E06C75;"> rowIndex</span><span style="color:#56B6C2;"> =</span><span style="color:#E5C07B;"> tablet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getRowSize</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#E5C07B;">            tablet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">addTimestamp</span><span style="color:#ABB2BF;">(rowIndex, timestamp);</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:#E06C75;"> s</span><span style="color:#56B6C2;"> =</span><span style="color:#D19A66;"> 0</span><span style="color:#ABB2BF;">; s </span><span style="color:#56B6C2;">&lt;</span><span style="color:#D19A66;"> 3</span><span style="color:#ABB2BF;">; s++) {</span></span>
 <span class="line"><span style="color:#C678DD;">                long</span><span style="color:#E06C75;"> value</span><span style="color:#56B6C2;"> =</span><span style="color:#E5C07B;"> random</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">nextLong</span><span style="color:#ABB2BF;">();</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:#E5C07B;">schemaList</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">get</span><span style="color:#ABB2BF;">(s).</span><span style="color:#61AFEF;">getMeasurementName</span><span style="color:#ABB2BF;">(), rowIndex, value);</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:#61AFEF;">getRowSize</span><span style="color:#ABB2BF;">() </span><span style="color:#56B6C2;">==</span><span style="color:#E5C07B;"> tablet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getMaxRowNumber</span><span style="color:#ABB2BF;">()) {</span></span>
 <span class="line"><span style="color:#E5C07B;">                sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">insertTablet</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;">            timestamp++;</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:#61AFEF;">getRowSize</span><span style="color:#ABB2BF;">() </span><span style="color:#56B6C2;">!=</span><span style="color:#D19A66;"> 0</span><span style="color:#ABB2BF;">) {</span></span>
 <span class="line"><span style="color:#E5C07B;">            sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">insertTablet</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;">    public</span><span style="color:#C678DD;"> static</span><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> closeSessionPool</span><span style="color:#ABB2BF;">(){</span></span>
 <span class="line"><span style="color:#E5C07B;">        sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">close</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#ABB2BF;">    }</span></span>
 <span class="line"><span style="color:#ABB2BF;">}</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="_2-3-2-sql-operations" tabindex="-1"><a class="header-anchor" href="#_2-3-2-sql-operations"><span>2.3.2 SQL Operations</span></a></h4><p>SQL operations are divided into two categories: queries and non-queries. The corresponding interfaces are executeQuery and executeNonQuery. The difference between them is that the former executes specific query statements and returns a result set, while the latter performs insert, delete, and update operations and does not return a result set.</p><div class="language-java line-numbers-mode" data-highlighter="shiki" data-ext="java" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-java"><span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> java.util.ArrayList</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> java.util.List</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.iotdb.isession.pool.SessionDataSetWrapper</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.iotdb.rpc.IoTDBConnectionException</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.iotdb.rpc.StatementExecutionException</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.iotdb.session.pool.SessionPool</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">public</span><span style="color:#C678DD;"> class</span><span style="color:#E5C07B;"> SessionPoolExample</span><span style="color:#ABB2BF;"> {</span></span>
 <span class="line"><span style="color:#C678DD;">  private</span><span style="color:#C678DD;"> static</span><span style="color:#E5C07B;"> SessionPool</span><span style="color:#E06C75;"> sessionPool</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">  public</span><span style="color:#C678DD;"> static</span><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> main</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">String</span><span style="color:#ABB2BF;">[] </span><span style="color:#E06C75;font-style:italic;">args</span><span style="color:#ABB2BF;">)</span><span style="color:#C678DD;"> throws</span><span style="color:#E5C07B;"> IoTDBConnectionException</span><span style="color:#ABB2BF;">,</span><span style="color:#E5C07B;"> StatementExecutionException</span><span style="color:#ABB2BF;"> {</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">        // 1. init SessionPool</span></span>
 <span class="line"><span style="color:#61AFEF;">        constructSessionPool</span><span style="color:#ABB2BF;">(); </span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">        // 2. executes a non-query SQL statement, such as a DDL or DML command.</span></span>
 <span class="line"><span style="color:#61AFEF;">        executeQueryExample</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">        // 3. executes a query SQL statement and returns the result set.</span></span>
 <span class="line"><span style="color:#61AFEF;">        executeNonQueryExample</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">        // 4. close SessionPool</span></span>
 <span class="line"><span style="color:#61AFEF;">        closeSessionPool</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#ABB2BF;">    }</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">    private</span><span style="color:#C678DD;"> static</span><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> executeNonQueryExample</span><span style="color:#ABB2BF;">()</span><span style="color:#C678DD;"> throws</span><span style="color:#E5C07B;"> IoTDBConnectionException</span><span style="color:#ABB2BF;">,</span><span style="color:#E5C07B;"> StatementExecutionException</span><span style="color:#ABB2BF;"> {</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">        // 1. create a nonAligned time series</span></span>
 <span class="line"><span style="color:#E5C07B;">        sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">executeNonQueryStatement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;create timeseries root.test.d1.s1 with dataType = int32&quot;</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">        // 2. set ttl</span></span>
 <span class="line"><span style="color:#E5C07B;">        sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">executeNonQueryStatement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;set TTL to root.test.** 10000&quot;</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">        // 3. delete time series</span></span>
 <span class="line"><span style="color:#E5C07B;">        sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">executeNonQueryStatement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;delete timeseries root.test.d1.s1&quot;</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"><span style="color:#ABB2BF;">    }</span></span>
 <span class="line"><span style="color:#E06C75;">    </span></span>
 <span class="line"><span style="color:#C678DD;">    private</span><span style="color:#C678DD;"> static</span><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> executeQueryExample</span><span style="color:#ABB2BF;">()</span><span style="color:#C678DD;"> throws</span><span style="color:#E5C07B;"> IoTDBConnectionException</span><span style="color:#ABB2BF;">,</span><span style="color:#E5C07B;"> StatementExecutionException</span><span style="color:#ABB2BF;"> {</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">        // 1. execute normal query</span></span>
 <span class="line"><span style="color:#C678DD;">        try</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">SessionDataSetWrapper</span><span style="color:#E06C75;"> wrapper</span><span style="color:#56B6C2;"> =</span><span style="color:#E5C07B;"> sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">executeQueryStatement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;select s1 from root.sg1.d1 limit 10&quot;</span><span style="color:#ABB2BF;">)) {</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">            // get DataIterator like JDBC</span></span>
 <span class="line"><span style="color:#E5C07B;">            DataIterator</span><span style="color:#E06C75;"> dataIterator</span><span style="color:#56B6C2;"> =</span><span style="color:#E5C07B;"> wrapper</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">iterator</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#E5C07B;">            System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">println</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">wrapper</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getColumnNames</span><span style="color:#ABB2BF;">());</span></span>
 <span class="line"><span style="color:#E5C07B;">            System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">println</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">wrapper</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getColumnTypes</span><span style="color:#ABB2BF;">());</span></span>
 <span class="line"><span style="color:#C678DD;">            while</span><span style="color:#ABB2BF;"> (</span><span style="color:#E5C07B;">dataIterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">next</span><span style="color:#ABB2BF;">()) {</span></span>
 <span class="line"><span style="color:#E5C07B;">                StringBuilder</span><span style="color:#E06C75;"> builder</span><span style="color:#56B6C2;"> =</span><span style="color:#C678DD;"> new</span><span style="color:#61AFEF;"> StringBuilder</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#C678DD;">                for</span><span style="color:#ABB2BF;"> (</span><span style="color:#E5C07B;">String</span><span style="color:#E06C75;"> columnName</span><span style="color:#C678DD;"> :</span><span style="color:#E5C07B;"> wrapper</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getColumnNames</span><span style="color:#ABB2BF;">()) {</span></span>
 <span class="line"><span style="color:#E5C07B;">                    builder</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">append</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">dataIterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getString</span><span style="color:#ABB2BF;">(columnName) </span><span style="color:#56B6C2;">+</span><span style="color:#98C379;"> &quot; &quot;</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"><span style="color:#ABB2BF;">                }</span></span>
 <span class="line"><span style="color:#E5C07B;">                System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">println</span><span style="color:#ABB2BF;">(builder);</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:#7F848E;font-style:italic;">        // 2. execute aggregate query</span></span>
 <span class="line"><span style="color:#C678DD;">        try</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">SessionDataSetWrapper</span><span style="color:#E06C75;"> wrapper</span><span style="color:#56B6C2;"> =</span><span style="color:#E5C07B;"> sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">executeQueryStatement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;select count(s1) from root.sg1.d1 group by ([0, 40), 5ms) &quot;</span><span style="color:#ABB2BF;">)) {</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">            // get DataIterator like JDBC</span></span>
 <span class="line"><span style="color:#E5C07B;">            DataIterator</span><span style="color:#E06C75;"> dataIterator</span><span style="color:#56B6C2;"> =</span><span style="color:#E5C07B;"> wrapper</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">iterator</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#E5C07B;">            System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">println</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">wrapper</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getColumnNames</span><span style="color:#ABB2BF;">());</span></span>
 <span class="line"><span style="color:#E5C07B;">            System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">println</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">wrapper</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getColumnTypes</span><span style="color:#ABB2BF;">());</span></span>
 <span class="line"><span style="color:#C678DD;">            while</span><span style="color:#ABB2BF;"> (</span><span style="color:#E5C07B;">dataIterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">next</span><span style="color:#ABB2BF;">()) {</span></span>
 <span class="line"><span style="color:#E5C07B;">                StringBuilder</span><span style="color:#E06C75;"> builder</span><span style="color:#56B6C2;"> =</span><span style="color:#C678DD;"> new</span><span style="color:#61AFEF;"> StringBuilder</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#C678DD;">                for</span><span style="color:#ABB2BF;"> (</span><span style="color:#E5C07B;">String</span><span style="color:#E06C75;"> columnName</span><span style="color:#C678DD;"> :</span><span style="color:#E5C07B;"> wrapper</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getColumnNames</span><span style="color:#ABB2BF;">()) {</span></span>
 <span class="line"><span style="color:#E5C07B;">                    builder</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">append</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">dataIterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getString</span><span style="color:#ABB2BF;">(columnName) </span><span style="color:#56B6C2;">+</span><span style="color:#98C379;"> &quot; &quot;</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"><span style="color:#ABB2BF;">                }</span></span>
 <span class="line"><span style="color:#E5C07B;">                System</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">out</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">println</span><span style="color:#ABB2BF;">(builder);</span></span>
 <span class="line"><span style="color:#ABB2BF;">            }</span></span>
 <span class="line"><span style="color:#ABB2BF;">        }</span></span>
 <span class="line"><span style="color:#ABB2BF;">    }</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">    private</span><span style="color:#C678DD;"> static</span><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> constructSessionPool</span><span style="color:#ABB2BF;">()</span><span style="color:#ABB2BF;"> {</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">    // Using nodeUrls ensures that when one node goes down, other nodes are automatically connected to retry</span></span>
 <span class="line"><span style="color:#E5C07B;">    List</span><span style="color:#ABB2BF;">&lt;</span><span style="color:#E5C07B;">String</span><span style="color:#ABB2BF;">&gt; </span><span style="color:#E06C75;">nodeUrls</span><span style="color:#56B6C2;"> =</span><span style="color:#C678DD;"> new</span><span style="color:#E5C07B;"> ArrayList</span><span style="color:#ABB2BF;">&lt;&gt;();</span></span>
 <span class="line"><span style="color:#E5C07B;">    nodeUrls</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">add</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;127.0.0.1:6667&quot;</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"><span style="color:#E5C07B;">    nodeUrls</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">add</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;127.0.0.1:6668&quot;</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"><span style="color:#ABB2BF;">    sessionPool </span><span style="color:#56B6C2;">=</span></span>
 <span class="line"><span style="color:#C678DD;">            new</span><span style="color:#ABB2BF;"> SessionPool.</span><span style="color:#61AFEF;">Builder</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"><span style="color:#ABB2BF;">                    .</span><span style="color:#61AFEF;">nodeUrls</span><span style="color:#ABB2BF;">(nodeUrls)</span></span>
 <span class="line"><span style="color:#ABB2BF;">                    .</span><span style="color:#61AFEF;">user</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root&quot;</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#ABB2BF;">                    .</span><span style="color:#61AFEF;">password</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root&quot;</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#ABB2BF;">                    .</span><span style="color:#61AFEF;">maxSize</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">3</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#ABB2BF;">                    .</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>
 <span class="line"><span style="color:#C678DD;">    public</span><span style="color:#C678DD;"> static</span><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> closeSessionPool</span><span style="color:#ABB2BF;">(){</span></span>
 <span class="line"><span style="color:#E5C07B;">        sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">close</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#ABB2BF;">    }</span></span>
 <span class="line"><span style="color:#ABB2BF;">}</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>For more information on the use of result sets and their method <code>SessionDataSet.DataIterator</code>, please refer to the following example (note: the <code>getBlob</code> and <code>getDate</code> interfaces have been supported since version V2.0.4):</p><div class="language-java line-numbers-mode" data-highlighter="shiki" data-ext="java" style="background-color:#282c34;color:#abb2bf;"><pre class="shiki one-dark-pro vp-code"><code class="language-java"><span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.iotdb.isession.SessionDataSet</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.iotdb.isession.pool.SessionDataSetWrapper</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.iotdb.rpc.IoTDBConnectionException</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.iotdb.rpc.StatementExecutionException</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.iotdb.session.pool.SessionPool</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.tsfile.enums.TSDataType</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.tsfile.utils.Binary</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.tsfile.utils.DateUtils</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.tsfile.write.record.Tablet</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.apache.tsfile.write.schema.MeasurementSchema</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> org.junit.Assert</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> java.sql.Timestamp</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> java.util.ArrayList</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> java.util.Arrays</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">import</span><span style="color:#E5C07B;"> java.util.List</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">public</span><span style="color:#C678DD;"> class</span><span style="color:#E5C07B;"> SessionExample</span><span style="color:#ABB2BF;"> {</span></span>
 <span class="line"><span style="color:#C678DD;">  private</span><span style="color:#C678DD;"> static</span><span style="color:#E5C07B;"> SessionPool</span><span style="color:#E06C75;"> sessionPool</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">  public</span><span style="color:#C678DD;"> static</span><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> main</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">String</span><span style="color:#ABB2BF;">[] </span><span style="color:#E06C75;font-style:italic;">args</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#C678DD;">      throws</span><span style="color:#E5C07B;"> IoTDBConnectionException</span><span style="color:#ABB2BF;">,</span><span style="color:#E5C07B;"> StatementExecutionException</span><span style="color:#ABB2BF;"> {</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">    // 1. init SessionPool</span></span>
 <span class="line"><span style="color:#61AFEF;">    constructSessionPool</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">    // 2. executes a query SQL statement, such as a DDL or DML command.</span></span>
 <span class="line"><span style="color:#61AFEF;">    executeQueryExample</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#7F848E;font-style:italic;">    // 3. close SessionPool</span></span>
 <span class="line"><span style="color:#61AFEF;">    closeSessionPool</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#ABB2BF;">  }</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">  private</span><span style="color:#C678DD;"> static</span><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> executeQueryExample</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"><span style="color:#C678DD;">      throws</span><span style="color:#E5C07B;"> IoTDBConnectionException</span><span style="color:#ABB2BF;">,</span><span style="color:#E5C07B;"> StatementExecutionException</span><span style="color:#ABB2BF;"> {</span></span>
 <span class="line"><span style="color:#E5C07B;">    Tablet</span><span style="color:#E06C75;"> tablet</span><span style="color:#56B6C2;"> =</span></span>
 <span class="line"><span style="color:#C678DD;">        new</span><span style="color:#61AFEF;"> Tablet</span><span style="color:#ABB2BF;">(</span></span>
 <span class="line"><span style="color:#98C379;">            &quot;root.sg.d1&quot;</span><span style="color:#ABB2BF;">,</span></span>
 <span class="line"><span style="color:#E5C07B;">            Arrays</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">asList</span><span style="color:#ABB2BF;">(</span></span>
 <span class="line"><span style="color:#C678DD;">                new</span><span style="color:#61AFEF;"> MeasurementSchema</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;s1&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#E5C07B;">TSDataType</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">INT32</span><span style="color:#ABB2BF;">),</span></span>
 <span class="line"><span style="color:#C678DD;">                new</span><span style="color:#61AFEF;"> MeasurementSchema</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;s2&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#E5C07B;">TSDataType</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">INT64</span><span style="color:#ABB2BF;">),</span></span>
 <span class="line"><span style="color:#C678DD;">                new</span><span style="color:#61AFEF;"> MeasurementSchema</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;s3&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#E5C07B;">TSDataType</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">FLOAT</span><span style="color:#ABB2BF;">),</span></span>
 <span class="line"><span style="color:#C678DD;">                new</span><span style="color:#61AFEF;"> MeasurementSchema</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;s4&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#E5C07B;">TSDataType</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">DOUBLE</span><span style="color:#ABB2BF;">),</span></span>
 <span class="line"><span style="color:#C678DD;">                new</span><span style="color:#61AFEF;"> MeasurementSchema</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;s5&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#E5C07B;">TSDataType</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">TEXT</span><span style="color:#ABB2BF;">),</span></span>
 <span class="line"><span style="color:#C678DD;">                new</span><span style="color:#61AFEF;"> MeasurementSchema</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;s6&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#E5C07B;">TSDataType</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">BOOLEAN</span><span style="color:#ABB2BF;">),</span></span>
 <span class="line"><span style="color:#C678DD;">                new</span><span style="color:#61AFEF;"> MeasurementSchema</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;s7&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#E5C07B;">TSDataType</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">TIMESTAMP</span><span style="color:#ABB2BF;">),</span></span>
 <span class="line"><span style="color:#C678DD;">                new</span><span style="color:#61AFEF;"> MeasurementSchema</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;s8&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#E5C07B;">TSDataType</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">BLOB</span><span style="color:#ABB2BF;">),</span></span>
 <span class="line"><span style="color:#C678DD;">                new</span><span style="color:#61AFEF;"> MeasurementSchema</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;s9&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#E5C07B;">TSDataType</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">STRING</span><span style="color:#ABB2BF;">),</span></span>
 <span class="line"><span style="color:#C678DD;">                new</span><span style="color:#61AFEF;"> MeasurementSchema</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;s10&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#E5C07B;">TSDataType</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">DATE</span><span style="color:#ABB2BF;">),</span></span>
 <span class="line"><span style="color:#C678DD;">                new</span><span style="color:#61AFEF;"> MeasurementSchema</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;s11&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#E5C07B;">TSDataType</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">TIMESTAMP</span><span style="color:#ABB2BF;">)),</span></span>
 <span class="line"><span style="color:#D19A66;">            10</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"><span style="color:#E5C07B;">    tablet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">addTimestamp</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">0</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">0L</span><span style="color:#ABB2BF;">);</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:#98C379;">&quot;s1&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">0</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">1</span><span style="color:#ABB2BF;">);</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:#98C379;">&quot;s2&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">0</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">1L</span><span style="color:#ABB2BF;">);</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:#98C379;">&quot;s3&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">0</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">0f</span><span style="color:#ABB2BF;">);</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:#98C379;">&quot;s4&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">0</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">0d</span><span style="color:#ABB2BF;">);</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:#98C379;">&quot;s5&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">0</span><span style="color:#ABB2BF;">, </span><span style="color:#98C379;">&quot;text_value&quot;</span><span style="color:#ABB2BF;">);</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:#98C379;">&quot;s6&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">0</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">true</span><span style="color:#ABB2BF;">);</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:#98C379;">&quot;s7&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">0</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">1L</span><span style="color:#ABB2BF;">);</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:#98C379;">&quot;s8&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">0</span><span style="color:#ABB2BF;">, </span><span style="color:#C678DD;">new</span><span style="color:#61AFEF;"> Binary</span><span style="color:#ABB2BF;">(</span><span style="color:#C678DD;">new</span><span style="color:#C678DD;"> byte</span><span style="color:#ABB2BF;">[] {</span><span style="color:#D19A66;">1</span><span style="color:#ABB2BF;">}));</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:#98C379;">&quot;s9&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">0</span><span style="color:#ABB2BF;">, </span><span style="color:#98C379;">&quot;string_value&quot;</span><span style="color:#ABB2BF;">);</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:#98C379;">&quot;s10&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#D19A66;">0</span><span style="color:#ABB2BF;">, </span><span style="color:#E5C07B;">DateUtils</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">parseIntToLocalDate</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">20250403</span><span style="color:#ABB2BF;">));</span></span>
 <span class="line"><span style="color:#E5C07B;">    tablet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">initBitMaps</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#E5C07B;">    tablet</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">bitMaps</span><span style="color:#ABB2BF;">[</span><span style="color:#D19A66;">10</span><span style="color:#ABB2BF;">].</span><span style="color:#61AFEF;">mark</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">0</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"><span style="color:#E5C07B;">    tablet</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">rowSize</span><span style="color:#56B6C2;"> =</span><span style="color:#D19A66;"> 1</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#E5C07B;">    sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">insertAlignedTablet</span><span style="color:#ABB2BF;">(tablet);</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#C678DD;">    try</span><span style="color:#ABB2BF;"> (</span><span style="color:#E5C07B;">SessionDataSetWrapper</span><span style="color:#E06C75;"> dataSet</span><span style="color:#56B6C2;"> =</span></span>
 <span class="line"><span style="color:#E5C07B;">        sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">executeQueryStatement</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;select * from root.sg.d1&quot;</span><span style="color:#ABB2BF;">)) {</span></span>
 <span class="line"><span style="color:#E5C07B;">      SessionDataSet</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">DataIterator</span><span style="color:#E06C75;"> iterator</span><span style="color:#56B6C2;"> =</span><span style="color:#E5C07B;"> dataSet</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">iterator</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#C678DD;">      int</span><span style="color:#E06C75;"> count</span><span style="color:#56B6C2;"> =</span><span style="color:#D19A66;"> 0</span><span style="color:#ABB2BF;">;</span></span>
 <span class="line"><span style="color:#C678DD;">      while</span><span style="color:#ABB2BF;"> (</span><span style="color:#E5C07B;">iterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">next</span><span style="color:#ABB2BF;">()) {</span></span>
 <span class="line"><span style="color:#ABB2BF;">        count++;</span></span>
 <span class="line"><span style="color:#E5C07B;">        Assert</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">assertFalse</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">iterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">isNull</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg.d1.s1&quot;</span><span style="color:#ABB2BF;">));</span></span>
 <span class="line"><span style="color:#E5C07B;">        Assert</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">assertEquals</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">1</span><span style="color:#ABB2BF;">, </span><span style="color:#E5C07B;">iterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getInt</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg.d1.s1&quot;</span><span style="color:#ABB2BF;">));</span></span>
 <span class="line"><span style="color:#E5C07B;">        Assert</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">assertFalse</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">iterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">isNull</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg.d1.s2&quot;</span><span style="color:#ABB2BF;">));</span></span>
 <span class="line"><span style="color:#E5C07B;">        Assert</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">assertEquals</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">1L</span><span style="color:#ABB2BF;">, </span><span style="color:#E5C07B;">iterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getLong</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg.d1.s2&quot;</span><span style="color:#ABB2BF;">));</span></span>
 <span class="line"><span style="color:#E5C07B;">        Assert</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">assertFalse</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">iterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">isNull</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg.d1.s3&quot;</span><span style="color:#ABB2BF;">));</span></span>
 <span class="line"><span style="color:#E5C07B;">        Assert</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">assertEquals</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">0</span><span style="color:#ABB2BF;">, </span><span style="color:#E5C07B;">iterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getFloat</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg.d1.s3&quot;</span><span style="color:#ABB2BF;">), </span><span style="color:#D19A66;">0.01</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"><span style="color:#E5C07B;">        Assert</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">assertFalse</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">iterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">isNull</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg.d1.s4&quot;</span><span style="color:#ABB2BF;">));</span></span>
 <span class="line"><span style="color:#E5C07B;">        Assert</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">assertEquals</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">0</span><span style="color:#ABB2BF;">, </span><span style="color:#E5C07B;">iterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getDouble</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg.d1.s4&quot;</span><span style="color:#ABB2BF;">), </span><span style="color:#D19A66;">0.01</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"><span style="color:#E5C07B;">        Assert</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">assertFalse</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">iterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">isNull</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg.d1.s5&quot;</span><span style="color:#ABB2BF;">));</span></span>
 <span class="line"><span style="color:#E5C07B;">        Assert</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">assertEquals</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;text_value&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#E5C07B;">iterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getString</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg.d1.s5&quot;</span><span style="color:#ABB2BF;">));</span></span>
 <span class="line"><span style="color:#E5C07B;">        Assert</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">assertFalse</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">iterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">isNull</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg.d1.s6&quot;</span><span style="color:#ABB2BF;">));</span></span>
 <span class="line"><span style="color:#E5C07B;">        Assert</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">assertTrue</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">iterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getBoolean</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg.d1.s6&quot;</span><span style="color:#ABB2BF;">));</span></span>
 <span class="line"><span style="color:#E5C07B;">        Assert</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">assertFalse</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">iterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">isNull</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg.d1.s7&quot;</span><span style="color:#ABB2BF;">));</span></span>
 <span class="line"><span style="color:#E5C07B;">        Assert</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">assertEquals</span><span style="color:#ABB2BF;">(</span><span style="color:#C678DD;">new</span><span style="color:#61AFEF;"> Timestamp</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">1</span><span style="color:#ABB2BF;">), </span><span style="color:#E5C07B;">iterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getTimestamp</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg.d1.s7&quot;</span><span style="color:#ABB2BF;">));</span></span>
 <span class="line"><span style="color:#E5C07B;">        Assert</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">assertFalse</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">iterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">isNull</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg.d1.s8&quot;</span><span style="color:#ABB2BF;">));</span></span>
 <span class="line"><span style="color:#E5C07B;">        Assert</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">assertEquals</span><span style="color:#ABB2BF;">(</span><span style="color:#C678DD;">new</span><span style="color:#61AFEF;"> Binary</span><span style="color:#ABB2BF;">(</span><span style="color:#C678DD;">new</span><span style="color:#C678DD;"> byte</span><span style="color:#ABB2BF;">[] {</span><span style="color:#D19A66;">1</span><span style="color:#ABB2BF;">}), </span><span style="color:#E5C07B;">iterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getBlob</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg.d1.s8&quot;</span><span style="color:#ABB2BF;">));</span></span>
 <span class="line"><span style="color:#E5C07B;">        Assert</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">assertFalse</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">iterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">isNull</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg.d1.s9&quot;</span><span style="color:#ABB2BF;">));</span></span>
 <span class="line"><span style="color:#E5C07B;">        Assert</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">assertEquals</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;string_value&quot;</span><span style="color:#ABB2BF;">, </span><span style="color:#E5C07B;">iterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getString</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg.d1.s9&quot;</span><span style="color:#ABB2BF;">));</span></span>
 <span class="line"><span style="color:#E5C07B;">        Assert</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">assertFalse</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">iterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">isNull</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg.d1.s10&quot;</span><span style="color:#ABB2BF;">));</span></span>
 <span class="line"><span style="color:#E5C07B;">        Assert</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">assertEquals</span><span style="color:#ABB2BF;">(</span></span>
 <span class="line"><span style="color:#E5C07B;">            DateUtils</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">parseIntToLocalDate</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">20250403</span><span style="color:#ABB2BF;">), </span><span style="color:#E5C07B;">iterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getDate</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg.d1.s10&quot;</span><span style="color:#ABB2BF;">));</span></span>
 <span class="line"><span style="color:#E5C07B;">        Assert</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">assertTrue</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">iterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">isNull</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg.d1.s11&quot;</span><span style="color:#ABB2BF;">));</span></span>
 <span class="line"><span style="color:#E5C07B;">        Assert</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">assertNull</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">iterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getTimestamp</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root.sg.d1.s11&quot;</span><span style="color:#ABB2BF;">));</span></span>
 <span class="line"></span>
 <span class="line"><span style="color:#E5C07B;">        Assert</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">assertEquals</span><span style="color:#ABB2BF;">(</span><span style="color:#C678DD;">new</span><span style="color:#61AFEF;"> Timestamp</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">0</span><span style="color:#ABB2BF;">), </span><span style="color:#E5C07B;">iterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">getTimestamp</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;Time&quot;</span><span style="color:#ABB2BF;">));</span></span>
 <span class="line"><span style="color:#E5C07B;">        Assert</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">assertFalse</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">iterator</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">isNull</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;Time&quot;</span><span style="color:#ABB2BF;">));</span></span>
 <span class="line"><span style="color:#ABB2BF;">      }</span></span>
 <span class="line"><span style="color:#E5C07B;">      Assert</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">assertEquals</span><span style="color:#ABB2BF;">(</span><span style="color:#E5C07B;">tablet</span><span style="color:#ABB2BF;">.</span><span style="color:#E5C07B;">rowSize</span><span style="color:#ABB2BF;">, count);</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;">  private</span><span style="color:#C678DD;"> static</span><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> constructSessionPool</span><span style="color:#ABB2BF;">()</span><span style="color:#ABB2BF;"> {</span></span>
 <span class="line"><span style="color:#E5C07B;">    List</span><span style="color:#ABB2BF;">&lt;</span><span style="color:#E5C07B;">String</span><span style="color:#ABB2BF;">&gt; </span><span style="color:#E06C75;">nodeUrls</span><span style="color:#56B6C2;"> =</span><span style="color:#C678DD;"> new</span><span style="color:#E5C07B;"> ArrayList</span><span style="color:#ABB2BF;">&lt;&gt;();</span></span>
 <span class="line"><span style="color:#E5C07B;">    nodeUrls</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">add</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;127.0.0.1:6667&quot;</span><span style="color:#ABB2BF;">);</span></span>
 <span class="line"><span style="color:#ABB2BF;">    sessionPool </span><span style="color:#56B6C2;">=</span></span>
 <span class="line"><span style="color:#C678DD;">        new</span><span style="color:#ABB2BF;"> SessionPool.</span><span style="color:#61AFEF;">Builder</span><span style="color:#ABB2BF;">()</span></span>
 <span class="line"><span style="color:#ABB2BF;">            .</span><span style="color:#61AFEF;">nodeUrls</span><span style="color:#ABB2BF;">(nodeUrls)</span></span>
 <span class="line"><span style="color:#ABB2BF;">            .</span><span style="color:#61AFEF;">user</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root&quot;</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#ABB2BF;">            .</span><span style="color:#61AFEF;">password</span><span style="color:#ABB2BF;">(</span><span style="color:#98C379;">&quot;root&quot;</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#ABB2BF;">            .</span><span style="color:#61AFEF;">maxSize</span><span style="color:#ABB2BF;">(</span><span style="color:#D19A66;">3</span><span style="color:#ABB2BF;">)</span></span>
 <span class="line"><span style="color:#ABB2BF;">            .</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>
 <span class="line"><span style="color:#C678DD;">  public</span><span style="color:#C678DD;"> static</span><span style="color:#C678DD;"> void</span><span style="color:#61AFEF;"> closeSessionPool</span><span style="color:#ABB2BF;">()</span><span style="color:#ABB2BF;"> {</span></span>
 <span class="line"><span style="color:#E5C07B;">    sessionPool</span><span style="color:#ABB2BF;">.</span><span style="color:#61AFEF;">close</span><span style="color:#ABB2BF;">();</span></span>
 <span class="line"><span style="color:#ABB2BF;">  }</span></span>
 <span class="line"><span style="color:#ABB2BF;">}</span></span></code></pre><div class="line-numbers" aria-hidden="true" style="counter-reset:line-number 0;"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="_3-native-interface-description" tabindex="-1"><a class="header-anchor" href="#_3-native-interface-description"><span>3. Native Interface Description</span></a></h3><h4 id="_3-1-parameter-list" tabindex="-1"><a class="header-anchor" href="#_3-1-parameter-list"><span>3.1 Parameter List</span></a></h4><p>The Session class has the following fields, which can be set through the constructor or the Session.Builder method:</p><table><thead><tr><th><strong>Field Name</strong></th><th><strong>Type</strong></th><th><strong>Description</strong></th></tr></thead><tbody><tr><td><code>nodeUrls</code></td><td><code>List&lt;String&gt;</code></td><td>List of URLs for database nodes, supporting multiple node connections</td></tr><tr><td><code>username</code></td><td><code>String</code></td><td>Username</td></tr><tr><td><code>password</code></td><td><code>String</code></td><td>Password</td></tr><tr><td><code>fetchSize</code></td><td><code>int</code></td><td>Default batch size for query results</td></tr><tr><td><code>useSSL</code></td><td><code>boolean</code></td><td>Whether to enable SSL</td></tr><tr><td><code>trustStore</code></td><td><code>String</code></td><td>Path to the trust store</td></tr><tr><td><code>trustStorePwd</code></td><td><code>String</code></td><td>Password for the trust store</td></tr><tr><td><code>queryTimeoutInMs</code></td><td><code>long</code></td><td>Query timeout in milliseconds</td></tr><tr><td><code>enableRPCCompression</code></td><td><code>boolean</code></td><td>Whether to enable RPC compression</td></tr><tr><td><code>connectionTimeoutInMs</code></td><td><code>int</code></td><td>Connection timeout in milliseconds</td></tr><tr><td><code>zoneId</code></td><td><code>ZoneId</code></td><td>Time zone setting for the session</td></tr><tr><td><code>thriftDefaultBufferSize</code></td><td><code>int</code></td><td>Default buffer size for Thrift Thrift</td></tr><tr><td><code>thriftMaxFrameSize</code></td><td><code>int</code></td><td>Maximum frame size for Thrift Thrift</td></tr><tr><td><code>defaultEndPoint</code></td><td><code>TEndPoint</code></td><td>Default database endpoint information</td></tr><tr><td><code>defaultSessionConnection</code></td><td><code>SessionConnection</code></td><td>Default session connection object</td></tr><tr><td><code>isClosed</code></td><td><code>boolean</code></td><td>Whether the current session is closed</td></tr><tr><td><code>enableRedirection</code></td><td><code>boolean</code></td><td>Whether to enable redirection</td></tr><tr><td><code>enableRecordsAutoConvertTablet</code></td><td><code>boolean</code></td><td>Whether to enable the function of recording the automatic transfer to Tablet</td></tr><tr><td><code>deviceIdToEndpoint</code></td><td><code>Map&lt;String, TEndPoint&gt;</code></td><td>Mapping of device IDs to database endpoints</td></tr><tr><td><code>endPointToSessionConnection</code></td><td><code>Map&lt;TEndPoint, SessionConnection&gt;</code></td><td>Mapping of database endpoints to session connections</td></tr><tr><td><code>executorService</code></td><td><code>ScheduledExecutorService</code></td><td>Thread pool for periodically updating the node list</td></tr><tr><td><code>availableNodes</code></td><td><code>INodeSupplier</code></td><td>Supplier of available nodes</td></tr><tr><td><code>enableQueryRedirection</code></td><td><code>boolean</code></td><td>Whether to enable query redirection</td></tr><tr><td><code>version</code></td><td><code>Version</code></td><td>Client version number, used for compatibility judgment with the server</td></tr><tr><td><code>enableAutoFetch</code></td><td><code>boolean</code></td><td>Whether to enable automatic fetching</td></tr><tr><td><code>maxRetryCount</code></td><td><code>int</code></td><td>Maximum number of retries</td></tr><tr><td><code>retryIntervalInMs</code></td><td><code>long</code></td><td>Retry interval in milliseconds</td></tr></tbody></table><h4 id="_3-2-interface-list" tabindex="-1"><a class="header-anchor" href="#_3-2-interface-list"><span>3.2 Interface list</span></a></h4><h5 id="_3-2-1-metadata-management" tabindex="-1"><a class="header-anchor" href="#_3-2-1-metadata-management"><span>3.2.1 Metadata Management</span></a></h5><table><thead><tr><th><strong>Method Name</strong></th><th><strong>Function Description</strong></th><th><strong>Parameter Explanation</strong></th></tr></thead><tbody><tr><td><code>createDatabase(String database)</code></td><td>Create a database</td><td><code>database</code>: The name of the database to be created</td></tr><tr><td><code>deleteDatabase(String database)</code></td><td>Delete a specified database</td><td><code>database</code>: The name of the database to be deleted</td></tr><tr><td><code>deleteDatabases(List&lt;String&gt; databases)</code></td><td>Batch delete databases</td><td><code>databases</code>: A list of database names to be deleted</td></tr><tr><td><code>createTimeseries(String path, TSDataType dataType, TSEncoding encoding, CompressionType compressor)</code></td><td>Create a single time series</td><td><code>path</code>: The path of the time series，<code>dataType</code>: The data type，<code>encoding</code>: The encoding type，<code>compressor</code>: The compression type</td></tr><tr><td><code>createAlignedTimeseries(...)</code></td><td>Create aligned time series</td><td>Device ID, list of measurement points, list of data types, list of encodings, list of compression types</td></tr><tr><td><code>createMultiTimeseries(...)</code></td><td>Batch create time series</td><td>Multiple paths, data types, encodings, compression types, properties, tags, aliases, etc.</td></tr><tr><td><code>deleteTimeseries(String path)</code></td><td>Delete a time series</td><td><code>path</code>: The path of the time series to be deleted</td></tr><tr><td><code>deleteTimeseries(List&lt;String&gt; paths)</code></td><td>Batch delete time series</td><td><code>paths</code>: A list of time series paths to be deleted</td></tr><tr><td><code>setSchemaTemplate(String templateName, String prefixPath)</code></td><td>Set a schema template</td><td><code>templateName</code>: The name of template，<code>prefixPath</code>: The path where the template is applied</td></tr><tr><td><code>createSchemaTemplate(Template template)</code></td><td>Create a schema template</td><td><code>template</code>: The template object</td></tr><tr><td><code>dropSchemaTemplate(String templateName)</code></td><td>Delete a schema template</td><td><code>templateName</code>: The name of template to be deleted</td></tr><tr><td><code>addAlignedMeasurementsInTemplate(...)</code></td><td>Add aligned measurements to a template</td><td>Template name, list of measurement paths, data type, encoding type, compression type</td></tr><tr><td><code>addUnalignedMeasurementsInTemplate(...)</code></td><td>Add unaligned measurements to a template</td><td>Same as above</td></tr><tr><td><code>deleteNodeInTemplate(String templateName, String path)</code></td><td>Delete a node in a template</td><td><code>templateName</code>: The name of template，<code>path</code>: The path to be deleted</td></tr><tr><td><code>countMeasurementsInTemplate(String name)</code></td><td>Count the number of measurements in a template</td><td><code>name</code>: The name of template</td></tr><tr><td><code>isMeasurementInTemplate(String templateName, String path)</code></td><td>Check if a measurement exists in a template</td><td><code>templateName</code>: The name of template，<code>path</code>: The path of the measurement</td></tr><tr><td><code>isPathExistInTemplate(String templateName, String path)</code></td><td>Check if a path exists in a template</td><td>same as above</td></tr><tr><td><code>showMeasurementsInTemplate(String templateName)</code></td><td>Show measurements in a template</td><td><code>templateName</code>: The name of template</td></tr><tr><td><code>showMeasurementsInTemplate(String templateName, String pattern)</code></td><td>Show measurements in a template by pattern</td><td><code>templateName</code>: The name of template，<code>pattern</code>: The matching pattern</td></tr><tr><td><code>showAllTemplates()</code></td><td>Show all templates</td><td>No parameters</td></tr><tr><td><code>showPathsTemplateSetOn(String templateName)</code></td><td>Show paths where a template is set</td><td><code>templateName</code>: The name of the template</td></tr><tr><td><code>showPathsTemplateUsingOn(String templateName)</code></td><td>Show actual paths using a template</td><td>Same as above上</td></tr><tr><td><code>unsetSchemaTemplate(String prefixPath, String templateName)</code></td><td>Unset the template setting for a path</td><td><code>prefixPath</code>: The path，<code>templateName</code>: The name of template</td></tr></tbody></table><h5 id="_3-2-2-data-insertion" tabindex="-1"><a class="header-anchor" href="#_3-2-2-data-insertion"><span>3.2.2 Data Insertion</span></a></h5><table><thead><tr><th><strong>Method Name</strong></th><th><strong>Function Description</strong></th><th><strong>Parameter Explanation</strong></th></tr></thead><tbody><tr><td><code>insertRecord(String deviceId, long time, List&lt;String&gt; measurements, List&lt;TSDataType&gt; types, Object... values)</code></td><td>Insert a single record</td><td><code>deviceId</code>: Device ID，<code>time</code>: Timestamp，<code>measurements</code>: List of measurement points，<code>types</code>: List of data types，<code>values</code>: List of values</td></tr><tr><td><code>insertRecord(String deviceId, long time, List&lt;String&gt; measurements, List&lt;String&gt; values)</code></td><td>Insert a single record</td><td><code>deviceId</code>: Device ID，<code>time</code>: Timestamp，<code>measurements</code>: List of measurement points，<code>values</code>: List of values</td></tr><tr><td><code>insertRecords(List&lt;String&gt; deviceIds, List&lt;Long&gt; times, List&lt;List&lt;String&gt;&gt; measurementsList, List&lt;List&lt;Object&gt;&gt; valuesList)</code></td><td>Insert multiple records</td><td><code>deviceIds</code>: List of device IDs，<code>times</code>: List of timestamps，<code>measurementsList</code>: List of timestamps，<code>valuesList</code>: List of lists of values</td></tr><tr><td><code>insertRecords(List&lt;String&gt; deviceIds, List&lt;Long&gt; times, List&lt;List&lt;String&gt;&gt; measurementsList, List&lt;List&lt;TSDataType&gt;&gt; typesList, List&lt;List&lt;Object&gt;&gt; valuesList)</code></td><td>Insert multiple records</td><td>Same as above，plus <code>typesList</code>: List of lists of data types</td></tr><tr><td><code>insertRecordsOfOneDevice(String deviceId, List&lt;Long&gt; times, List&lt;List&lt;String&gt;&gt; measurementsList, List&lt;List&lt;TSDataType&gt;&gt; typesList, List&lt;List&lt;Object&gt;&gt; valuesList)</code></td><td>Insert multiple records for a single device</td><td><code>deviceId</code>: Device ID，<code>times</code>: List of timestamps，<code>measurementsList</code>: List of lists of measurement points，<code>typesList</code>: List of lists of types，<code>valuesList</code>: List of lists of values</td></tr><tr><td><code>insertRecordsOfOneDevice(String deviceId, List&lt;Long&gt; times, List&lt;List&lt;String&gt;&gt; measurementsList, List&lt;List&lt;TSDataType&gt;&gt; typesList, List&lt;List&lt;Object&gt;&gt; valuesList, boolean haveSorted)</code></td><td>Insert sorted multiple records for a single device</td><td>Same as above, plus <code>haveSorted</code>: Whether the data is already sorted</td></tr><tr><td><code>insertStringRecordsOfOneDevice(String deviceId, List&lt;Long&gt; times, List&lt;List&lt;String&gt;&gt; measurementsList, List&lt;List&lt;String&gt;&gt; valuesList)</code></td><td>Insert string-formatted records for a single device</td><td><code>deviceId</code>: Device ID，<code>times</code>: List of timestamps，<code>measurementsList</code>: List of lists of measurement points，<code>valuesList</code>: List of lists of values</td></tr><tr><td><code>insertStringRecordsOfOneDevice(String deviceId, List&lt;Long&gt; times, List&lt;List&lt;String&gt;&gt; measurementsList, List&lt;List&lt;String&gt;&gt; valuesList, boolean haveSorted)</code></td><td>Insert sorted string-formatted records for a single device</td><td>Same as above, plus <code>haveSorted</code>: Whether the data is already sorted序</td></tr><tr><td><code>insertAlignedRecord(String deviceId, long time, List&lt;String&gt; measurements, List&lt;TSDataType&gt; types, List&lt;Object&gt; values)</code></td><td>Insert a single aligned record</td><td><code>deviceId</code>: Device ID，<code>time</code>: Timestamp，<code>measurements</code>: List of measurement points，<code>types</code>: List of types，<code>values</code>: List of values</td></tr><tr><td><code>insertAlignedRecord(String deviceId, long time, List&lt;String&gt; measurements, List&lt;String&gt; values)</code></td><td>Insert a single string-formatted aligned record</td><td><code>deviceId</code>: Device ID<code>time</code>: Timestamp,<code>measurements</code>: List of measurement points，<code>values</code>: List of values</td></tr><tr><td><code>insertAlignedRecords(List&lt;String&gt; deviceIds, List&lt;Long&gt; times, List&lt;List&lt;String&gt;&gt; measurementsList, List&lt;List&lt;Object&gt;&gt; valuesList)</code></td><td>Insert multiple aligned records</td><td><code>deviceIds</code>: List of device IDs，<code>times</code>: List of timestamps，<code>measurementsList</code>: List of lists of measurement points，<code>valuesList</code>: List of lists of values</td></tr><tr><td><code>insertAlignedRecords(List&lt;String&gt; deviceIds, List&lt;Long&gt; times, List&lt;List&lt;String&gt;&gt; measurementsList, List&lt;List&lt;TSDataType&gt;&gt; typesList, List&lt;List&lt;Object&gt;&gt; valuesList)</code></td><td>Insert multiple aligned records</td><td>Same as above, plus <code>typesList</code>: List of lists of data types</td></tr><tr><td><code>insertAlignedRecordsOfOneDevice(String deviceId, List&lt;Long&gt; times, List&lt;List&lt;String&gt;&gt; measurementsList, List&lt;List&lt;TSDataType&gt;&gt; typesList, List&lt;List&lt;Object&gt;&gt; valuesList)</code></td><td>Insert multiple aligned records for a single device</td><td>Same as above</td></tr><tr><td><code>insertAlignedRecordsOfOneDevice(String deviceId, List&lt;Long&gt; times, List&lt;List&lt;String&gt;&gt; measurementsList, List&lt;List&lt;TSDataType&gt;&gt; typesList, List&lt;List&lt;Object&gt;&gt; valuesList, boolean haveSorted)</code></td><td>Insert sorted multiple aligned records for a single device</td><td>Same as above, plus <code>haveSorted</code>: Whether the data is already sorted</td></tr><tr><td><code>insertAlignedStringRecordsOfOneDevice(String deviceId, List&lt;Long&gt; times, List&lt;List&lt;String&gt;&gt; measurementsList, List&lt;List&lt;String&gt;&gt; valuesList)</code></td><td>Insert string-formatted aligned records for a single device</td><td><code>deviceId</code>: Device ID，<code>times</code>: List of timestamps，<code>measurementsList</code>: List of lists of measurement points，<code>valuesList</code>: List of lists of values</td></tr><tr><td><code>insertAlignedStringRecordsOfOneDevice(String deviceId, List&lt;Long&gt; times, List&lt;List&lt;String&gt;&gt; measurementsList, List&lt;List&lt;String&gt;&gt; valuesList, boolean haveSorted)</code></td><td>Insert sorted string-formatted aligned records for a single device</td><td>Same as above, plus w <code>haveSorted</code>: whether the data is already sorted</td></tr><tr><td><code>insertTablet(Tablet tablet)</code></td><td>Insert a single Tablet data</td><td><code>tablet</code>: The Tablet data to be inserted</td></tr><tr><td><code>insertTablet(Tablet tablet, boolean sorted)</code></td><td>Insert a sorted Tablet data</td><td>Same as above, plus <code>sorted</code>: whether the data is already sorted</td></tr><tr><td><code>insertAlignedTablet(Tablet tablet)</code></td><td>Insert an aligned Tablet data</td><td><code>tablet</code>: The Tablet data to be inserted</td></tr><tr><td><code>insertAlignedTablet(Tablet tablet, boolean sorted)</code></td><td>Insert a sorted aligned Tablet data</td><td>Same as above, plus <code>sorted</code>: whether the data is already sorted</td></tr><tr><td><code>insertTablets(Map&lt;String, Tablet&gt; tablets)</code></td><td>Insert multiple Tablet data in batch</td><td><code>tablets</code>: Mapping from device IDs to Tablet data</td></tr><tr><td><code>insertTablets(Map&lt;String, Tablet&gt; tablets, boolean sorted)</code></td><td>Insert sorted multiple Tablet data in batch</td><td>Same as above, plus <code>sorted</code>: whether the data is already sorted</td></tr><tr><td><code>insertAlignedTablets(Map&lt;String, Tablet&gt; tablets)</code></td><td>Insert multiple aligned Tablet data in batch</td><td><code>tablets</code>: Mapping from device IDs to Tablet data</td></tr><tr><td><code>insertAlignedTablets(Map&lt;String, Tablet&gt; tablets, boolean sorted)</code></td><td>Insert sorted multiple aligned Tablet data in batch</td><td>Same as above, plus <code>sorted</code>: whether the data is already sorted</td></tr></tbody></table><h5 id="_3-2-3-data-deletion" tabindex="-1"><a class="header-anchor" href="#_3-2-3-data-deletion"><span>3.2.3 Data Deletion</span></a></h5><table><thead><tr><th><strong>Method Name</strong></th><th><strong>Function Description</strong></th><th><strong>Parameter Explanation</strong></th></tr></thead><tbody><tr><td><code>deleteTimeseries(String path)</code></td><td>Delete a single time series</td><td><code>path</code>: The path of the time series</td></tr><tr><td><code>deleteTimeseries(List&lt;String&gt; paths)</code></td><td>Batch delete time series</td><td><code>paths</code>: A list of time series paths</td></tr><tr><td><code>deleteData(String path, long endTime)</code></td><td>Delete historical data for a specified path</td><td><code>path</code>: The path，<code>endTime</code>: The end timestamp</td></tr><tr><td><code>deleteData(List&lt;String&gt; paths, long endTime)</code></td><td>Batch delete historical data for specified paths</td><td><code>paths</code>: A list of paths，<code>endTime</code>: The end timestamp</td></tr><tr><td><code>deleteData(List&lt;String&gt; paths, long startTime, long endTime)</code></td><td>Delete historical data within a time range for specified paths</td><td>Same as above, plus <code>startTime</code>: The start timestamp</td></tr></tbody></table><h5 id="_3-2-4-data-query" tabindex="-1"><a class="header-anchor" href="#_3-2-4-data-query"><span>3.2.4 Data Query</span></a></h5><table><thead><tr><th><strong>Method Name</strong></th><th><strong>Function Description</strong></th><th><strong>Parameter Explanation</strong></th></tr></thead><tbody><tr><td><code>executeQueryStatement(String sql)</code></td><td>Execute a query statement</td><td><code>sql</code>: The query SQL statement</td></tr><tr><td><code>executeQueryStatement(String sql, long timeoutInMs)</code></td><td>Execute a query statement with timeout</td><td><code>sql</code>: The query SQL statement, <code>timeoutInMs</code>: The query timeout (in milliseconds), default to the server configuration, which is 60s.</td></tr><tr><td><code>executeRawDataQuery(List&lt;String&gt; paths, long startTime, long endTime)</code></td><td>Query raw data for specified paths</td><td>paths: A list of query paths, <code>startTime</code>: The start timestamp, <code>endTime</code>: The end timestamp</td></tr><tr><td><code>executeRawDataQuery(List&lt;String&gt; paths, long startTime, long endTime, long timeOut)</code></td><td>Query raw data for specified paths (with timeout)</td><td>Same as above, plus <code>timeOut</code>: The timeout time</td></tr><tr><td><code>executeLastDataQuery(List&lt;String&gt; paths)</code></td><td>Query the latest data</td><td><code>paths</code>: A list of query paths</td></tr><tr><td><code>executeLastDataQuery(List&lt;String&gt; paths, long lastTime)</code></td><td>Query the latest data at a specified time</td><td><code>paths</code>: A list of query paths, <code>lastTime</code>: The specified timestamp</td></tr><tr><td><code>executeLastDataQuery(List&lt;String&gt; paths, long lastTime, long timeOut)</code></td><td>Query the latest data at a specified time (with timeout)</td><td>Same as above, plus <code>timeOut</code>: The timeout time</td></tr><tr><td><code>executeLastDataQueryForOneDevice(String db, String device, List&lt;String&gt; sensors, boolean isLegalPathNodes)</code></td><td>Query the latest data for a single device</td><td><code>db</code>: The database name, <code>device</code>: The device name, <code>sensors</code>: A list of sensors, <code>isLegalPathNodes</code>: Whether the path nodes are legal</td></tr><tr><td><code>executeAggregationQuery(List&lt;String&gt; paths, List&lt;TAggregationType&gt; aggregations)</code></td><td>Execute an aggregation query</td><td><code>paths</code>: A list of query paths, <code>aggregations</code>: A list of aggregation types</td></tr><tr><td><code>executeAggregationQuery(List&lt;String&gt; paths, List&lt;TAggregationType&gt; aggregations, long startTime, long endTime)</code></td><td>Execute an aggregation query with a time range</td><td>Same as above, plus <code>startTime</code>: The start timestamp, <code>endTime</code>:\` The end timestamp</td></tr><tr><td><code>executeAggregationQuery(List&lt;String&gt; paths, List&lt;TAggregationType&gt; aggregations, long startTime, long endTime, long interval)</code></td><td>Execute an aggregation query with a time interval</td><td>Same as above, plus <code>interval</code>: The time interval</td></tr><tr><td><code>executeAggregationQuery(List&lt;String&gt; paths, List&lt;TAggregationType&gt; aggregations, long startTime, long endTime, long interval, long slidingStep)</code></td><td>Execute a sliding window aggregation query</td><td>Same as above, plus <code>slidingStep</code>: The sliding step</td></tr><tr><td><code>fetchAllConnections()</code></td><td>Get information of all active connections</td><td>No parameters</td></tr></tbody></table><h5 id="_3-2-5-system-status-and-backup" tabindex="-1"><a class="header-anchor" href="#_3-2-5-system-status-and-backup"><span>3.2.5 System Status and Backup</span></a></h5><table><thead><tr><th><strong>Method Name</strong></th><th><strong>Function Description</strong></th><th><strong>Parameter Explanation</strong></th></tr></thead><tbody><tr><td><code>getBackupConfiguration()</code></td><td>Get backup configuration information</td><td>No parameters</td></tr><tr><td><code>fetchAllConnections()</code></td><td>Get information of all active connections</td><td>No parameters</td></tr><tr><td><code>getSystemStatus()</code></td><td>Get the system status</td><td>Deprecated, returns <code>SystemStatus.NORMAL</code></td></tr></tbody></table>`,48)])])}const c=n(t,[["render",o]]),i=JSON.parse('{"path":"/UserGuide/latest/API/Programming-Java-Native-API_apache.html","title":"Java Native API","lang":"en-US","frontmatter":{"description":"Java Native API In the native API of IoTDB, the Session is the core interface for interacting with the database. It integrates a rich set of methods that support data writing, q...","head":[["script",{"type":"application/ld+json"},"{\\"@context\\":\\"https://schema.org\\",\\"@type\\":\\"Article\\",\\"headline\\":\\"Java Native API\\",\\"image\\":[\\"\\"],\\"dateModified\\":\\"2026-03-25T07:01:57.000Z\\",\\"author\\":[]}"],["meta",{"property":"og:url","content":"https://iotdb.apache.org/UserGuide/latest/API/Programming-Java-Native-API_apache.html"}],["meta",{"property":"og:site_name","content":"IoTDB Website"}],["meta",{"property":"og:title","content":"Java Native API"}],["meta",{"property":"og:description","content":"Java Native API In the native API of IoTDB, the Session is the core interface for interacting with the database. It integrates a rich set of methods that support data writing, q..."}],["meta",{"property":"og:type","content":"article"}],["meta",{"property":"og:locale","content":"en-US"}],["meta",{"property":"og:locale:alternate","content":"zh-CN"}],["meta",{"property":"og:updated_time","content":"2026-03-25T07:01:57.000Z"}],["meta",{"property":"article:modified_time","content":"2026-03-25T07:01:57.000Z"}],["link",{"rel":"alternate","hreflang":"zh-cn","href":"https://iotdb.apache.org/zh/UserGuide/latest/API/Programming-Java-Native-API_apache.html"}]]},"git":{"createdTime":1688958677000,"updatedTime":1774422117000,"contributors":[{"name":"CritasWang","username":"CritasWang","email":"critas@outlook.com","commits":1,"url":"https://github.com/CritasWang"},{"name":"Wei-hao-Li","username":"Wei-hao-Li","email":"60659567+Wei-hao-Li@users.noreply.github.com","commits":1,"url":"https://github.com/Wei-hao-Li"},{"name":"2b3c511","username":"2b3c511","email":"43237967+2b3c511@users.noreply.github.com","commits":1,"url":"https://github.com/2b3c511"},{"name":"LeiRui","username":"LeiRui","email":"33376433+LeiRui@users.noreply.github.com","commits":1,"url":"https://github.com/LeiRui"},{"name":"Christofer Dutz","username":"","email":"christofer.dutz@c-ware.de","commits":1},{"name":"wanghui42","username":"wanghui42","email":"105700158+wanghui42@users.noreply.github.com","commits":1,"url":"https://github.com/wanghui42"},{"name":"mal117","username":"mal117","email":"107627937+mal117@users.noreply.github.com","commits":1,"url":"https://github.com/mal117"},{"name":"Haonan","username":"Haonan","email":"hhaonan@outlook.com","commits":1,"url":"https://github.com/Haonan"},{"name":"W1y1r","username":"W1y1r","email":"150988475+W1y1r@users.noreply.github.com","commits":5,"url":"https://github.com/W1y1r"},{"name":"StefanieZhao7","username":"StefanieZhao7","email":"131440380+StefanieZhao7@users.noreply.github.com","commits":1,"url":"https://github.com/StefanieZhao7"},{"name":"Xinyi Zhao","username":"","email":"xinyizhao@XinyideMacBook-Pro.local","commits":1},{"name":"VGalaxies","username":"VGalaxies","email":"dyc1904821183@gmail.com","commits":1,"url":"https://github.com/VGalaxies"},{"name":"shuwenwei","username":"shuwenwei","email":"55970239+shuwenwei@users.noreply.github.com","commits":1,"url":"https://github.com/shuwenwei"},{"name":"leto-b","username":"leto-b","email":"bingqian.bai@timecho.com","commits":8,"url":"https://github.com/leto-b"}]},"readingTime":{"minutes":12.19,"words":3658},"filePathRelative":"UserGuide/latest/API/Programming-Java-Native-API_apache.md","autoDesc":true}');export{c as comp,i as data};