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    <span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></nav>  <ul class="sidebar-links"><li><section class="sidebar-group depth-0"><p class="sidebar-heading"><span>IoTDB用户手册 (In progress)</span> <!----></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>IoTDB简介</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>快速上手</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>数据模式与概念</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>SQL命令行终端(CLI)</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>权限管理</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>IoTDB-SQL 语言</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>应用编程接口</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>高级功能</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>通信服务协议</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>系统工具</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>端云协同</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading open"><span>系统集成</span> <span class="arrow down"></span></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/zh/UserGuide/Master/Ecosystem Integration/Grafana.html" class="sidebar-link">Grafana-IoTDB</a></li><li><a href="/zh/UserGuide/Master/Ecosystem Integration/Zeppelin-IoTDB.html" class="sidebar-link">Zeppelin-IoTDB</a></li><li><a href="/zh/UserGuide/Master/Ecosystem Integration/Spark TsFile.html" class="sidebar-link">Spark TsFile</a></li><li><a href="/zh/UserGuide/Master/Ecosystem Integration/MapReduce TsFile.html" class="sidebar-link">Hadoop-TsFile</a></li><li><a href="/zh/UserGuide/Master/Ecosystem Integration/Spark IoTDB.html" class="active sidebar-link">Spark-IoTDB</a></li><li><a href="/zh/UserGuide/Master/Ecosystem Integration/Hive TsFile.html" class="sidebar-link">Hive-TsFile</a></li><li><a href="/zh/UserGuide/Master/Ecosystem Integration/Flink TsFile.html" class="sidebar-link">Flink-TsFile</a></li><li><a href="/zh/UserGuide/Master/Ecosystem Integration/Flink IoTDB.html" class="sidebar-link">Flink-IoTDB</a></li><li><a href="/zh/UserGuide/Master/Ecosystem Integration/Writing Data on HDFS.html" class="sidebar-link">HDFS集成</a></li></ul></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>集群搭建</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>常见问题</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>附录</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>时间序列数据库比较</span> <span class="arrow right"></span></p> <!----></section></li></ul> </aside> <main class="page"> <div class="content content__default"><h2 id="spark-iotdb"><a href="#spark-iotdb" class="header-anchor">#</a> Spark-IoTDB</h2> <h3 id="版本"><a href="#版本" class="header-anchor">#</a> 版本</h3> <p>Spark和Java所需的版本如下：</p> <table><thead><tr><th>Spark Version</th> <th>Scala Version</th> <th>Java Version</th> <th>TsFile</th></tr></thead> <tbody><tr><td><code>2.4.3</code></td> <td><code>2.11</code></td> <td><code>1.8</code></td> <td><code>0.13.0-SNAPSHOT</code></td></tr></tbody></table> <h3 id="安装"><a href="#安装" class="header-anchor">#</a> 安装</h3> <p>mvn clean scala:compile compile install</p> <h4 id="maven依赖"><a href="#maven依赖" class="header-anchor">#</a> Maven依赖</h4> <div class="language- line-numbers-mode"><pre class="language-text"><code>    &lt;dependency&gt;
      &lt;groupId&gt;org.apache.iotdb&lt;/groupId&gt;
      &lt;artifactId&gt;spark-iotdb-connector&lt;/artifactId&gt;
      &lt;version&gt;0.13.0-SNAPSHOT&lt;/version&gt;
    &lt;/dependency&gt;
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br></div></div><h4 id="spark-shell用户指南"><a href="#spark-shell用户指南" class="header-anchor">#</a> Spark-shell用户指南</h4> <div class="language- line-numbers-mode"><pre class="language-text"><code>spark-shell --jars spark-iotdb-connector-0.13.0-SNAPSHOT.jar,iotdb-jdbc-0.13.0-SNAPSHOT-jar-with-dependencies.jar

import org.apache.iotdb.spark.db._

val df = spark.read.format(&quot;org.apache.iotdb.spark.db&quot;).option(&quot;url&quot;,&quot;jdbc:iotdb://127.0.0.1:6667/&quot;).option(&quot;sql&quot;,&quot;select * from root&quot;).load

df.printSchema()

df.show()
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br></div></div><p>如果要对rdd进行分区，可以执行以下操作</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>spark-shell --jars spark-iotdb-connector-0.13.0-SNAPSHOT.jar,iotdb-jdbc-0.13.0-SNAPSHOT-jar-with-dependencies.jar

import org.apache.iotdb.spark.db._

val df = spark.read.format(&quot;org.apache.iotdb.spark.db&quot;).option(&quot;url&quot;,&quot;jdbc:iotdb://127.0.0.1:6667/&quot;).option(&quot;sql&quot;,&quot;select * from root&quot;).
                        option(&quot;lowerBound&quot;, [lower bound of time that you want query(include)]).option(&quot;upperBound&quot;, [upper bound of time that you want query(include)]).
                        option(&quot;numPartition&quot;, [the partition number you want]).load

df.printSchema()

df.show()
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br></div></div><h4 id="模式推断"><a href="#模式推断" class="header-anchor">#</a> 模式推断</h4> <p>以下TsFile结构为例：TsFile模式中有三个度量：状态，温度和硬件。 这三种测量的基本信息如下：</p> <table><thead><tr><th>名称</th> <th>类型</th> <th>编码</th></tr></thead> <tbody><tr><td>状态</td> <td>Boolean</td> <td>PLAIN</td></tr> <tr><td>温度</td> <td>Float</td> <td>RLE</td></tr> <tr><td>硬件</td> <td>Text</td> <td>PLAIN</td></tr></tbody></table> <p>TsFile中的现有数据如下：</p> <ul><li>d1:root.ln.wf01.wt01</li> <li>d2:root.ln.wf02.wt02</li></ul> <table><thead><tr><th>time</th> <th>d1.status</th> <th>time</th> <th>d1.temperature</th> <th>time</th> <th>d2.hardware</th> <th>time</th> <th>d2.status</th></tr></thead> <tbody><tr><td>1</td> <td>True</td> <td>1</td> <td>2.2</td> <td>2</td> <td>&quot;aaa&quot;</td> <td>1</td> <td>True</td></tr> <tr><td>3</td> <td>True</td> <td>2</td> <td>2.2</td> <td>4</td> <td>&quot;bbb&quot;</td> <td>2</td> <td>False</td></tr> <tr><td>5</td> <td>False</td> <td>3</td> <td>2.1</td> <td>6</td> <td>&quot;ccc&quot;</td> <td>4</td> <td>True</td></tr></tbody></table> <p>宽（默认）表形式如下：</p> <table><thead><tr><th>time</th> <th>root.ln.wf02.wt02.temperature</th> <th>root.ln.wf02.wt02.status</th> <th>root.ln.wf02.wt02.hardware</th> <th>root.ln.wf01.wt01.temperature</th> <th>root.ln.wf01.wt01.status</th> <th>root.ln.wf01.wt01.hardware</th></tr></thead> <tbody><tr><td>1</td> <td>null</td> <td>true</td> <td>null</td> <td>2.2</td> <td>true</td> <td>null</td></tr> <tr><td>2</td> <td>null</td> <td>false</td> <td>aaa</td> <td>2.2</td> <td>null</td> <td>null</td></tr> <tr><td>3</td> <td>null</td> <td>null</td> <td>null</td> <td>2.1</td> <td>true</td> <td>null</td></tr> <tr><td>4</td> <td>null</td> <td>true</td> <td>bbb</td> <td>null</td> <td>null</td> <td>null</td></tr> <tr><td>5</td> <td>null</td> <td>null</td> <td>null</td> <td>null</td> <td>false</td> <td>null</td></tr> <tr><td>6</td> <td>null</td> <td>null</td> <td>ccc</td> <td>null</td> <td>null</td> <td>null</td></tr></tbody></table> <p>你还可以使用窄表形式，如下所示：（您可以参阅第4部分，了解如何使用窄表形式）</p> <table><thead><tr><th>时间</th> <th>设备名</th> <th>状态</th> <th>硬件</th> <th>温度</th></tr></thead> <tbody><tr><td>1</td> <td>root.ln.wf02.wt01</td> <td>true</td> <td>null</td> <td>2.2</td></tr> <tr><td>1</td> <td>root.ln.wf02.wt02</td> <td>true</td> <td>null</td> <td>null</td></tr> <tr><td>2</td> <td>root.ln.wf02.wt01</td> <td>null</td> <td>null</td> <td>2.2</td></tr> <tr><td>2</td> <td>root.ln.wf02.wt02</td> <td>false</td> <td>aaa</td> <td>null</td></tr> <tr><td>3</td> <td>root.ln.wf02.wt01</td> <td>true</td> <td>null</td> <td>2.1</td></tr> <tr><td>4</td> <td>root.ln.wf02.wt02</td> <td>true</td> <td>bbb</td> <td>null</td></tr> <tr><td>5</td> <td>root.ln.wf02.wt01</td> <td>false</td> <td>null</td> <td>null</td></tr> <tr><td>6</td> <td>root.ln.wf02.wt02</td> <td>null</td> <td>ccc</td> <td>null</td></tr></tbody></table> <h4 id="在宽和窄表之间转换"><a href="#在宽和窄表之间转换" class="header-anchor">#</a> 在宽和窄表之间转换</h4> <ul><li>从宽到窄</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>import org.apache.iotdb.spark.db._

val wide_df = spark.read.format(&quot;org.apache.iotdb.spark.db&quot;).option(&quot;url&quot;, &quot;jdbc:iotdb://127.0.0.1:6667/&quot;).option(&quot;sql&quot;, &quot;select * from root where time &lt; 1100 and time &gt; 1000&quot;).load
val narrow_df = Transformer.toNarrowForm(spark, wide_df)
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><ul><li>从窄到宽</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>import org.apache.iotdb.spark.db._

val wide_df = Transformer.toWideForm(spark, narrow_df)
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><h4 id="java用户指南"><a href="#java用户指南" class="header-anchor">#</a> Java用户指南</h4> <div class="language- line-numbers-mode"><pre class="language-text"><code>import org.apache.spark.sql.Dataset;
import org.apache.spark.sql.Row;
import org.apache.spark.sql.SparkSession;
import org.apache.iotdb.spark.db.*

public class Example {

  public static void main(String[] args) {
    SparkSession spark = SparkSession
        .builder()
        .appName(&quot;Build a DataFrame from Scratch&quot;)
        .master(&quot;local[*]&quot;)
        .getOrCreate();

    Dataset&lt;Row&gt; df = spark.read().format(&quot;org.apache.iotdb.spark.db&quot;)
        .option(&quot;url&quot;,&quot;jdbc:iotdb://127.0.0.1:6667/&quot;)
        .option(&quot;sql&quot;,&quot;select * from root&quot;).load();

    df.printSchema();

    df.show();
    
    Dataset&lt;Row&gt; narrowTable = Transformer.toNarrowForm(spark, df)
    narrowTable.show()
  }
}
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br></div></div></div> <div class="page-nav"><p class="inner"><span class="prev">
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