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Management</span><span class="arrow end"></span></button><!----></section></li><li><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">Maintenance Tools</span><span class="arrow end"></span></button><!----></section></li><li><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">Collaboration of Edge and Cloud</span><span class="arrow end"></span></button><!----></section></li><li><section class="sidebar-group"><button class="sidebar-heading clickable active"><!----><span class="title">Ecosystem Integration</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/UserGuide/V1.1.x/Ecosystem-Integration/Grafana-Plugin.html" class="nav-link sidebar-link sidebar-page" aria-label="Grafana-Plugin"><!---->Grafana-Plugin<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/UserGuide/V1.1.x/Ecosystem-Integration/Grafana-Connector.html" class="nav-link sidebar-link sidebar-page" aria-label="Grafana-Connector (Not Recommended)"><!---->Grafana-Connector (Not Recommended)<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/UserGuide/V1.1.x/Ecosystem-Integration/Zeppelin-IoTDB.html" class="nav-link sidebar-link sidebar-page" aria-label="Zeppelin-IoTDB"><!---->Zeppelin-IoTDB<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/UserGuide/V1.1.x/Ecosystem-Integration/DBeaver.html" class="nav-link sidebar-link sidebar-page" aria-label="DBeaver-IoTDB"><!---->DBeaver-IoTDB<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/UserGuide/V1.1.x/Ecosystem-Integration/MapReduce-TsFile.html" class="nav-link sidebar-link sidebar-page" aria-label="MapReduce-TsFile"><!---->MapReduce-TsFile<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/UserGuide/V1.1.x/Ecosystem-Integration/Spark-TsFile.html" class="nav-link sidebar-link sidebar-page" aria-label="Spark-TsFile"><!---->Spark-TsFile<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/UserGuide/V1.1.x/Ecosystem-Integration/Spark-IoTDB.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="Spark-IoTDB"><!---->Spark-IoTDB<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/UserGuide/V1.1.x/Ecosystem-Integration/Spark-IoTDB.html#spark-iotdb" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Spark-IoTDB"><!---->Spark-IoTDB<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/UserGuide/V1.1.x/Ecosystem-Integration/Spark-IoTDB.html#version" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Version"><!---->Version<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/UserGuide/V1.1.x/Ecosystem-Integration/Spark-IoTDB.html#notice" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Notice"><!---->Notice<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/UserGuide/V1.1.x/Ecosystem-Integration/Spark-IoTDB.html#install" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Install"><!---->Install<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/UserGuide/V1.1.x/Ecosystem-Integration/Spark-IoTDB.html#write-data-to-iotdb" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Write Data to IoTDB"><!---->Write Data to IoTDB<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/UserGuide/V1.1.x/Ecosystem-Integration/Hive-TsFile.html" class="nav-link sidebar-link sidebar-page" aria-label="Hive-TsFile"><!---->Hive-TsFile<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/UserGuide/V1.1.x/Ecosystem-Integration/Flink-IoTDB.html" class="nav-link sidebar-link sidebar-page" aria-label="Flink-IoTDB"><!---->Flink-IoTDB<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/UserGuide/V1.1.x/Ecosystem-Integration/Flink-TsFile.html" class="nav-link sidebar-link sidebar-page" aria-label="Flink-TsFile"><!---->Flink-TsFile<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/UserGuide/V1.1.x/Ecosystem-Integration/NiFi-IoTDB.html" class="nav-link sidebar-link sidebar-page" aria-label="NiFi-IoTDB"><!---->NiFi-IoTDB<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section></li><li><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">Cluster</span><span class="arrow end"></span></button><!----></section></li><li><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">FAQ</span><span class="arrow end"></span></button><!----></section></li><li><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">Reference</span><span class="arrow end"></span></button><!----></section></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!----></h1><div class="page-info"><!----><!----><!----><!----><span class="page-reading-time-info" aria-label="Reading Time"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewBox="0 0 1024 1024" fill="currentColor" 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aria-current="page" href="/UserGuide/V1.1.x/Ecosystem-Integration/Spark-IoTDB.html#spark-iotdb" class="router-link-active router-link-exact-active toc-link level2">Spark-IoTDB</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/V1.1.x/Ecosystem-Integration/Spark-IoTDB.html#version" class="router-link-active router-link-exact-active toc-link level3">Version</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/V1.1.x/Ecosystem-Integration/Spark-IoTDB.html#notice" class="router-link-active router-link-exact-active toc-link level3">Notice</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/V1.1.x/Ecosystem-Integration/Spark-IoTDB.html#install" class="router-link-active router-link-exact-active toc-link level3">Install</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/V1.1.x/Ecosystem-Integration/Spark-IoTDB.html#write-data-to-iotdb" class="router-link-active router-link-exact-active toc-link level3">Write Data to IoTDB</a></li><!----><!--]--></ul><!--]--></ul></div><!--[--><!----><!--]--></aside></div><!----><div class="theme-hope-content"><!-- |
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| distributed with this work for additional information |
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| http://www.apache.org/licenses/LICENSE-2.0 |
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| software distributed under the License is distributed on an |
| "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
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| under the License. |
| |
| --><h2 id="spark-iotdb" tabindex="-1"><a class="header-anchor" href="#spark-iotdb" aria-hidden="true">#</a> Spark-IoTDB</h2><h3 id="version" tabindex="-1"><a class="header-anchor" href="#version" aria-hidden="true">#</a> Version</h3><p>The versions required for Spark and Java are as follow:</p><table><thead><tr><th style="text-align:center;">Spark Version</th><th style="text-align:center;">Scala Version</th><th style="text-align:center;">Java Version</th><th style="text-align:center;">TsFile</th></tr></thead><tbody><tr><td style="text-align:center;"><code>2.4.0-3.2.0</code></td><td style="text-align:center;"><code>2.12</code></td><td style="text-align:center;"><code>1.8</code></td><td style="text-align:center;"><code>0.13.0</code></td></tr></tbody></table><h3 id="notice" tabindex="-1"><a class="header-anchor" href="#notice" aria-hidden="true">#</a> Notice</h3><ol><li><code>Spark IoTDB Connector</code> only supports Spark <code>2.4.5</code> to <code>3.2.0</code> with <code>Scala 2.12</code>. If you need to support other versions, you can modify the Scala version of the POM file in the module <code>spark-iotdb-connector</code> in the source code and then recompile it.</li><li>There is a conflict of thrift version between IoTDB and Spark. Therefore, if you want to debug in spark-shell, you need to execute <code>rm -f $SPARK_HOME/jars/libthrift*</code> and <code>cp $IOTDB_HOME/lib/libthrift* $SPARK_HOME/jars/</code> to resolve it. Otherwise, you can only debug the code in IDE. If you want to run your task by <code>spark-submit</code>, you must package with dependency.</li></ol><h3 id="install" tabindex="-1"><a class="header-anchor" href="#install" aria-hidden="true">#</a> Install</h3><div class="language-bash line-numbers-mode" data-ext="sh"><pre class="language-bash"><code>mvn clean scala:compile compile <span class="token function">install</span> |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h4 id="maven-dependency" tabindex="-1"><a class="header-anchor" href="#maven-dependency" aria-hidden="true">#</a> Maven Dependency</h4><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code> <dependency> |
| <groupId>org.apache.iotdb</groupId> |
| <artifactId>spark-iotdb-connector</artifactId> |
| <version>0.13.0</version> |
| </dependency> |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="spark-shell-user-guide" tabindex="-1"><a class="header-anchor" href="#spark-shell-user-guide" aria-hidden="true">#</a> spark-shell user guide</h4><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>spark-shell --jars spark-iotdb-connector-0.13.0.jar,iotdb-jdbc-0.13.0-jar-with-dependencies.jar,iotdb-session-0.13.0-jar-with-dependencies.jar |
| |
| import org.apache.iotdb.spark.db._ |
| |
| val df = spark.read.format("org.apache.iotdb.spark.db").option("url","jdbc:iotdb://127.0.0.1:6667/").option("sql","select * from root").load |
| |
| df.printSchema() |
| |
| df.show() |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>To partition rdd:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>spark-shell --jars spark-iotdb-connector-0.13.0.jar,iotdb-jdbc-0.13.0-jar-with-dependencies.jar,iotdb-session-0.13.0-jar-with-dependencies.jar |
| |
| import org.apache.iotdb.spark.db._ |
| |
| val df = spark.read.format("org.apache.iotdb.spark.db").option("url","jdbc:iotdb://127.0.0.1:6667/").option("sql","select * from root"). |
| option("lowerBound", [lower bound of time that you want query(include)]).option("upperBound", [upper bound of time that you want query(include)]). |
| option("numPartition", [the partition number you want]).load |
| |
| df.printSchema() |
| |
| df.show() |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="schema-inference" tabindex="-1"><a class="header-anchor" href="#schema-inference" aria-hidden="true">#</a> Schema Inference</h4><p>Take the following TsFile structure as an example: There are three Measurements in the TsFile schema: status, temperature, and hardware. The basic information of these three measurements is as follows:</p><table><thead><tr><th>Name</th><th>Type</th><th>Encode</th></tr></thead><tbody><tr><td>status</td><td>Boolean</td><td>PLAIN</td></tr><tr><td>temperature</td><td>Float</td><td>RLE</td></tr><tr><td>hardware</td><td>Text</td><td>PLAIN</td></tr></tbody></table><p>The existing data in the TsFile is as follows:</p><img width="517" alt="SI " src="https://alioss.timecho.com/docs/img/github/98197835-99a64980-1f62-11eb-84af-8301b8a6aad5.png"><p>The wide(default) table form is as follows:</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>You can also use narrow table form which as follows: (You can see part 4 about how to use narrow form)</p><table><thead><tr><th>time</th><th>device_name</th><th>status</th><th>hardware</th><th>temperature</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="transform-between-wide-and-narrow-table" tabindex="-1"><a class="header-anchor" href="#transform-between-wide-and-narrow-table" aria-hidden="true">#</a> Transform between wide and narrow table</h4><ul><li>from wide to narrow</li></ul><div class="language-scala line-numbers-mode" data-ext="scala"><pre class="language-scala"><code><span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>iotdb<span class="token punctuation">.</span>spark<span class="token punctuation">.</span>db<span class="token punctuation">.</span></span>_ |
| |
| <span class="token keyword">val</span> wide_df <span class="token operator">=</span> spark<span class="token punctuation">.</span>read<span class="token punctuation">.</span>format<span class="token punctuation">(</span><span class="token string">"org.apache.iotdb.spark.db"</span><span class="token punctuation">)</span><span class="token punctuation">.</span>option<span class="token punctuation">(</span><span class="token string">"url"</span><span class="token punctuation">,</span> <span class="token string">"jdbc:iotdb://127.0.0.1:6667/"</span><span class="token punctuation">)</span><span class="token punctuation">.</span>option<span class="token punctuation">(</span><span class="token string">"sql"</span><span class="token punctuation">,</span> <span class="token string">"select * from root.** where time < 1100 and time > 1000"</span><span class="token punctuation">)</span><span class="token punctuation">.</span>load |
| <span class="token keyword">val</span> narrow_df <span class="token operator">=</span> Transformer<span class="token punctuation">.</span>toNarrowForm<span class="token punctuation">(</span>spark<span class="token punctuation">,</span> wide_df<span class="token punctuation">)</span> |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><ul><li>from narrow to wide</li></ul><div class="language-scala line-numbers-mode" data-ext="scala"><pre class="language-scala"><code><span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>iotdb<span class="token punctuation">.</span>spark<span class="token punctuation">.</span>db<span class="token punctuation">.</span></span>_ |
| |
| <span class="token keyword">val</span> wide_df <span class="token operator">=</span> Transformer<span class="token punctuation">.</span>toWideForm<span class="token punctuation">(</span>spark<span class="token punctuation">,</span> narrow_df<span class="token punctuation">)</span> |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h4 id="java-user-guide" tabindex="-1"><a class="header-anchor" href="#java-user-guide" aria-hidden="true">#</a> Java user guide</h4><div class="language-java line-numbers-mode" data-ext="java"><pre class="language-java"><code><span class="token keyword">import</span> <span class="token import"><span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>spark<span class="token punctuation">.</span>sql<span class="token punctuation">.</span></span><span class="token class-name">Dataset</span></span><span class="token punctuation">;</span> |
| <span class="token keyword">import</span> <span class="token import"><span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>spark<span class="token punctuation">.</span>sql<span class="token punctuation">.</span></span><span class="token class-name">Row</span></span><span class="token punctuation">;</span> |
| <span class="token keyword">import</span> <span class="token import"><span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>spark<span class="token punctuation">.</span>sql<span class="token punctuation">.</span></span><span class="token class-name">SparkSession</span></span><span class="token punctuation">;</span> |
| <span class="token keyword">import</span> <span class="token import"><span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>iotdb<span class="token punctuation">.</span>spark<span class="token punctuation">.</span>db<span class="token punctuation">.</span></span><span class="token operator">*</span></span><span class="token punctuation">;</span> |
| |
| <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">Example</span> <span class="token punctuation">{</span> |
| |
| <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token punctuation">{</span> |
| <span class="token class-name">SparkSession</span> spark <span class="token operator">=</span> <span class="token class-name">SparkSession</span> |
| <span class="token punctuation">.</span><span class="token function">builder</span><span class="token punctuation">(</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">appName</span><span class="token punctuation">(</span><span class="token string">"Build a DataFrame from Scratch"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">master</span><span class="token punctuation">(</span><span class="token string">"local[*]"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">getOrCreate</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token class-name">Dataset</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">Row</span><span class="token punctuation">></span></span> df <span class="token operator">=</span> spark<span class="token punctuation">.</span><span class="token function">read</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">format</span><span class="token punctuation">(</span><span class="token string">"org.apache.iotdb.spark.db"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">option</span><span class="token punctuation">(</span><span class="token string">"url"</span><span class="token punctuation">,</span><span class="token string">"jdbc:iotdb://127.0.0.1:6667/"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span><span class="token function">option</span><span class="token punctuation">(</span><span class="token string">"sql"</span><span class="token punctuation">,</span><span class="token string">"select * from root"</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">load</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| df<span class="token punctuation">.</span><span class="token function">printSchema</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| df<span class="token punctuation">.</span><span class="token function">show</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| |
| <span class="token class-name">Dataset</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">Row</span><span class="token punctuation">></span></span> narrowTable <span class="token operator">=</span> <span class="token class-name">Transformer</span><span class="token punctuation">.</span><span class="token function">toNarrowForm</span><span class="token punctuation">(</span>spark<span class="token punctuation">,</span> df<span class="token punctuation">)</span><span class="token punctuation">;</span> |
| narrowTable<span class="token punctuation">.</span><span class="token function">show</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> |
| <span class="token punctuation">}</span> |
| <span class="token punctuation">}</span> |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="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="write-data-to-iotdb" tabindex="-1"><a class="header-anchor" href="#write-data-to-iotdb" aria-hidden="true">#</a> Write Data to IoTDB</h3><h4 id="user-guide" tabindex="-1"><a class="header-anchor" href="#user-guide" aria-hidden="true">#</a> User Guide</h4><div class="language-scala line-numbers-mode" data-ext="scala"><pre class="language-scala"><code><span class="token comment">// import narrow table</span> |
| <span class="token keyword">val</span> df <span class="token operator">=</span> spark<span class="token punctuation">.</span>createDataFrame<span class="token punctuation">(</span>List<span class="token punctuation">(</span> |
| <span class="token punctuation">(</span><span class="token number">1L</span><span class="token punctuation">,</span> <span class="token string">"root.test.d0"</span><span class="token punctuation">,</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">1L</span><span class="token punctuation">,</span> <span class="token number">1.0F</span><span class="token punctuation">,</span> <span class="token number">1.0D</span><span class="token punctuation">,</span> <span class="token boolean">true</span><span class="token punctuation">,</span> <span class="token string">"hello"</span><span class="token punctuation">)</span><span class="token punctuation">,</span> |
| <span class="token punctuation">(</span><span class="token number">2L</span><span class="token punctuation">,</span> <span class="token string">"root.test.d0"</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">2L</span><span class="token punctuation">,</span> <span class="token number">2.0F</span><span class="token punctuation">,</span> <span class="token number">2.0D</span><span class="token punctuation">,</span> <span class="token boolean">false</span><span class="token punctuation">,</span> <span class="token string">"world"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| |
| <span class="token keyword">val</span> dfWithColumn <span class="token operator">=</span> df<span class="token punctuation">.</span>withColumnRenamed<span class="token punctuation">(</span><span class="token string">"_1"</span><span class="token punctuation">,</span> <span class="token string">"Time"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span>withColumnRenamed<span class="token punctuation">(</span><span class="token string">"_2"</span><span class="token punctuation">,</span> <span class="token string">"device_name"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span>withColumnRenamed<span class="token punctuation">(</span><span class="token string">"_3"</span><span class="token punctuation">,</span> <span class="token string">"s0"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span>withColumnRenamed<span class="token punctuation">(</span><span class="token string">"_4"</span><span class="token punctuation">,</span> <span class="token string">"s1"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span>withColumnRenamed<span class="token punctuation">(</span><span class="token string">"_5"</span><span class="token punctuation">,</span> <span class="token string">"s2"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span>withColumnRenamed<span class="token punctuation">(</span><span class="token string">"_6"</span><span class="token punctuation">,</span> <span class="token string">"s3"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span>withColumnRenamed<span class="token punctuation">(</span><span class="token string">"_7"</span><span class="token punctuation">,</span> <span class="token string">"s4"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span>withColumnRenamed<span class="token punctuation">(</span><span class="token string">"_8"</span><span class="token punctuation">,</span> <span class="token string">"s5"</span><span class="token punctuation">)</span> |
| dfWithColumn |
| <span class="token punctuation">.</span>write |
| <span class="token punctuation">.</span>format<span class="token punctuation">(</span><span class="token string">"org.apache.iotdb.spark.db"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span>option<span class="token punctuation">(</span><span class="token string">"url"</span><span class="token punctuation">,</span> <span class="token string">"jdbc:iotdb://127.0.0.1:6667/"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span>save |
| |
| <span class="token comment">// import wide table</span> |
| <span class="token keyword">val</span> df <span class="token operator">=</span> spark<span class="token punctuation">.</span>createDataFrame<span class="token punctuation">(</span>List<span class="token punctuation">(</span> |
| <span class="token punctuation">(</span><span class="token number">1L</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">1L</span><span class="token punctuation">,</span> <span class="token number">1.0F</span><span class="token punctuation">,</span> <span class="token number">1.0D</span><span class="token punctuation">,</span> <span class="token boolean">true</span><span class="token punctuation">,</span> <span class="token string">"hello"</span><span class="token punctuation">)</span><span class="token punctuation">,</span> |
| <span class="token punctuation">(</span><span class="token number">2L</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">2L</span><span class="token punctuation">,</span> <span class="token number">2.0F</span><span class="token punctuation">,</span> <span class="token number">2.0D</span><span class="token punctuation">,</span> <span class="token boolean">false</span><span class="token punctuation">,</span> <span class="token string">"world"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span> |
| |
| <span class="token keyword">val</span> dfWithColumn <span class="token operator">=</span> df<span class="token punctuation">.</span>withColumnRenamed<span class="token punctuation">(</span><span class="token string">"_1"</span><span class="token punctuation">,</span> <span class="token string">"Time"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span>withColumnRenamed<span class="token punctuation">(</span><span class="token string">"_2"</span><span class="token punctuation">,</span> <span class="token string">"root.test.d0.s0"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span>withColumnRenamed<span class="token punctuation">(</span><span class="token string">"_3"</span><span class="token punctuation">,</span> <span class="token string">"root.test.d0.s1"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span>withColumnRenamed<span class="token punctuation">(</span><span class="token string">"_4"</span><span class="token punctuation">,</span> <span class="token string">"root.test.d0.s2"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span>withColumnRenamed<span class="token punctuation">(</span><span class="token string">"_5"</span><span class="token punctuation">,</span> <span class="token string">"root.test.d0.s3"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span>withColumnRenamed<span class="token punctuation">(</span><span class="token string">"_6"</span><span class="token punctuation">,</span> <span class="token string">"root.test.d0.s4"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span>withColumnRenamed<span class="token punctuation">(</span><span class="token string">"_7"</span><span class="token punctuation">,</span> <span class="token string">"root.test.d0.s5"</span><span class="token punctuation">)</span> |
| dfWithColumn<span class="token punctuation">.</span>write<span class="token punctuation">.</span>format<span class="token punctuation">(</span><span class="token string">"org.apache.iotdb.spark.db"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span>option<span class="token punctuation">(</span><span class="token string">"url"</span><span class="token punctuation">,</span> <span class="token string">"jdbc:iotdb://127.0.0.1:6667/"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span>option<span class="token punctuation">(</span><span class="token string">"numPartition"</span><span class="token punctuation">,</span> <span class="token string">"10"</span><span class="token punctuation">)</span> |
| <span class="token punctuation">.</span>save |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="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="notes" tabindex="-1"><a class="header-anchor" href="#notes" aria-hidden="true">#</a> Notes</h4><ol><li>You can directly write data to IoTDB whatever the dataframe contains a wide table or a narrow table.</li><li>The parameter <code>numPartition</code> is used to set the number of partitions. The dataframe that you want to save will be repartition based on this parameter before writing data. Each partition will open a session to write data to increase the number of concurrent requests.</li></ol></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/apache/iotdb/edit/rel/1.1/docs/UserGuide/Ecosystem-Integration/Spark-IoTDB.md" rel="noopener noreferrer" target="_blank" aria-label="Found Error? Edit this page on GitHub" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->Found Error? Edit this page on GitHub<span><svg class="external-link-icon" 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"><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="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item git-info"><!----><!----></div></footer><nav class="page-nav"><a href="/UserGuide/V1.1.x/Ecosystem-Integration/Spark-TsFile.html" class="nav-link prev" aria-label="Spark-TsFile"><div class="hint"><span class="arrow start"></span>Prev</div><div class="link"><!---->Spark-TsFile</div></a><a href="/UserGuide/V1.1.x/Ecosystem-Integration/Hive-TsFile.html" class="nav-link next" aria-label="Hive-TsFile"><div class="hint">Next<span class="arrow end"></span></div><div class="link">Hive-TsFile<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer style="padding-bottom:2rem;"><span id="doc-version" style="display:none;">rel/1.1</span><p style="text-align:center;color:#909399;font-size:12px;margin:0 30px;">Copyright © 2023 The Apache Software Foundation.<br> Apache and the Apache feather logo are trademarks of The Apache Software Foundation</p><p style="text-align:center;margin-top:10px;color:#909399;font-size:12px;margin:0 30px;"><strong>Have a question?</strong> Connect with us on QQ, WeChat, or Slack. <a href="https://github.com/apache/iotdb/issues/1995">Join the community</a> now.</p><p style="text-align:center;margin-top:10px;color:#909399;font-size:12px;margin:0 30px;"> We use <a href="https://analytics.google.com">Google Analytics</a> to collect anonymous, aggregated usage information. </p></footer></div><!--]--><!--]--><!----><!--]--></div> |
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