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class="sidebar-links"><li><!--[--><a href="/UserGuide/V0.13.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/V0.13.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/V0.13.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/V0.13.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/V0.13.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/V0.13.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 href="/UserGuide/V0.13.x/Ecosystem-Integration/Spark-IoTDB.html" class="nav-link sidebar-link sidebar-page" aria-label="Spark IoTDB"><!---->Spark IoTDB<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/UserGuide/V0.13.x/Ecosystem-Integration/Hive-TsFile.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="Hive TsFile"><!---->Hive TsFile<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/UserGuide/V0.13.x/Ecosystem-Integration/Hive-TsFile.html#hive-tsfile" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Hive-TsFile"><!---->Hive-TsFile<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/UserGuide/V0.13.x/Ecosystem-Integration/Hive-TsFile.html#about-hive-tsfile-connector" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="About Hive-TsFile-Connector"><!---->About Hive-TsFile-Connector<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/UserGuide/V0.13.x/Ecosystem-Integration/Hive-TsFile.html#system-requirements" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="System Requirements"><!---->System Requirements<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/UserGuide/V0.13.x/Ecosystem-Integration/Hive-TsFile.html#data-type-correspondence" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Data Type Correspondence"><!---->Data Type Correspondence<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/UserGuide/V0.13.x/Ecosystem-Integration/Hive-TsFile.html#add-dependency-for-hive" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Add Dependency For Hive"><!---->Add Dependency For Hive<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/UserGuide/V0.13.x/Ecosystem-Integration/Hive-TsFile.html#create-tsfile-backed-hive-tables" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Create Tsfile-backed Hive tables"><!---->Create Tsfile-backed Hive tables<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/UserGuide/V0.13.x/Ecosystem-Integration/Hive-TsFile.html#query-from-tsfile-backed-hive-tables" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Query from TsFile-backed Hive tables"><!---->Query from TsFile-backed Hive tables<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li></ul><!--]--></li><li><!--[--><a href="/UserGuide/V0.13.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/V0.13.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/V0.13.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">UDF Library</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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class="toc-place-holder"><aside id="toc"><!--[--><!----><!--]--><div class="toc-header">On This Page<button class="print-button" title="Print"><svg xmlns="http://www.w3.org/2000/svg" class="icon print-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="print icon"><path d="M819.2 364.8h-44.8V128c0-17.067-14.933-32-32-32H281.6c-17.067 0-32 14.933-32 32v236.8h-44.8C145.067 364.8 96 413.867 96 473.6v192c0 59.733 49.067 108.8 108.8 108.8h44.8V896c0 17.067 14.933 32 32 32h460.8c17.067 0 32-14.933 32-32V774.4h44.8c59.733 0 108.8-49.067 108.8-108.8v-192c0-59.733-49.067-108.8-108.8-108.8zM313.6 160h396.8v204.8H313.6V160zm396.8 704H313.6V620.8h396.8V864zM864 665.6c0 25.6-19.2 44.8-44.8 44.8h-44.8V588.8c0-17.067-14.933-32-32-32H281.6c-17.067 0-32 14.933-32 32v121.6h-44.8c-25.6 0-44.8-19.2-44.8-44.8v-192c0-25.6 19.2-44.8 44.8-44.8h614.4c25.6 0 44.8 19.2 44.8 44.8v192z"></path></svg></button></div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/V0.13.x/Ecosystem-Integration/Hive-TsFile.html#hive-tsfile" class="router-link-active router-link-exact-active toc-link level2">Hive-TsFile</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/V0.13.x/Ecosystem-Integration/Hive-TsFile.html#about-hive-tsfile-connector" class="router-link-active router-link-exact-active toc-link level3">About Hive-TsFile-Connector</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/V0.13.x/Ecosystem-Integration/Hive-TsFile.html#system-requirements" class="router-link-active router-link-exact-active toc-link level3">System Requirements</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/V0.13.x/Ecosystem-Integration/Hive-TsFile.html#data-type-correspondence" class="router-link-active router-link-exact-active toc-link level3">Data Type Correspondence</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/V0.13.x/Ecosystem-Integration/Hive-TsFile.html#add-dependency-for-hive" class="router-link-active router-link-exact-active toc-link level3">Add Dependency For Hive</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/V0.13.x/Ecosystem-Integration/Hive-TsFile.html#create-tsfile-backed-hive-tables" class="router-link-active router-link-exact-active toc-link level3">Create Tsfile-backed Hive tables</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/V0.13.x/Ecosystem-Integration/Hive-TsFile.html#query-from-tsfile-backed-hive-tables" class="router-link-active router-link-exact-active toc-link level3">Query from TsFile-backed Hive tables</a></li><!----><!--]--></ul><!--]--></ul></div><!--[--><!----><!--]--></aside></div><!----><div class="theme-hope-content"><!--

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--><h2 id="hive-tsfile" tabindex="-1"><a class="header-anchor" href="#hive-tsfile" aria-hidden="true">#</a> Hive-TsFile</h2><h3 id="about-hive-tsfile-connector" tabindex="-1"><a class="header-anchor" href="#about-hive-tsfile-connector" aria-hidden="true">#</a> About Hive-TsFile-Connector</h3><p>Hive-TsFile-Connector implements the support of Hive for external data sources of Tsfile type. This enables users to operate TsFile by Hive.</p><p>With this connector, you can</p><ul><li>Load a single TsFile, from either the local file system or hdfs, into hive</li><li>Load all files in a specific directory, from either the local file system or hdfs, into hive</li><li>Query the tsfile through HQL.</li><li>As of now, the write operation is not supported in hive-connector. So, insert operation in HQL is not allowed while operating tsfile through hive.</li></ul><h3 id="system-requirements" tabindex="-1"><a class="header-anchor" href="#system-requirements" aria-hidden="true">#</a> System Requirements</h3><table><thead><tr><th>Hadoop Version</th><th>Hive Version</th><th>Java Version</th><th>TsFile</th></tr></thead><tbody><tr><td><code>2.7.3</code> or <code>3.2.1</code></td><td><code>2.3.6</code> or <code>3.1.2</code></td><td><code>1.8</code></td><td><code>0.13.0-SNAPSHOT</code></td></tr></tbody></table><blockquote><p>Note: For more information about how to download and use TsFile, please see the following link: <a href="https://github.com/apache/iotdb/tree/master/tsfile" target="_blank" rel="noopener noreferrer">https://github.com/apache/iotdb/tree/master/tsfile<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>.</p></blockquote><h3 id="data-type-correspondence" tabindex="-1"><a class="header-anchor" href="#data-type-correspondence" aria-hidden="true">#</a> Data Type Correspondence</h3><table><thead><tr><th>TsFile data type</th><th>Hive field type</th></tr></thead><tbody><tr><td>BOOLEAN</td><td>Boolean</td></tr><tr><td>INT32</td><td>INT</td></tr><tr><td>INT64</td><td>BIGINT</td></tr><tr><td>FLOAT</td><td>Float</td></tr><tr><td>DOUBLE</td><td>Double</td></tr><tr><td>TEXT</td><td>STRING</td></tr></tbody></table><h3 id="add-dependency-for-hive" tabindex="-1"><a class="header-anchor" href="#add-dependency-for-hive" aria-hidden="true">#</a> Add Dependency For Hive</h3><p>To use hive-connector in hive, we should add the hive-connector jar into hive.</p><p>After downloading the code of iotdb from <a href="https://github.com/apache/iotdb" target="_blank" rel="noopener noreferrer">https://github.com/apache/iotdb<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>, you can use the command of <code>mvn clean package -pl hive-connector -am -Dmaven.test.skip=true -P get-jar-with-dependencies</code> to get a <code>hive-connector-X.X.X-jar-with-dependencies.jar</code>.</p><p>Then in hive, use the command of <code>add jar XXX</code> to add the dependency. For example:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>hive&gt; add jar /Users/hive/iotdb/hive-connector/target/hive-connector-0.13.0-SNAPSHOT-jar-with-dependencies.jar;

Added [/Users/hive/iotdb/hive-connector/target/hive-connector-0.13.0-SNAPSHOT-jar-with-dependencies.jar] to class path
Added resources: [/Users/hive/iotdb/hive-connector/target/hive-connector-0.13.0-SNAPSHOT-jar-with-dependencies.jar]
</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><h3 id="create-tsfile-backed-hive-tables" tabindex="-1"><a class="header-anchor" href="#create-tsfile-backed-hive-tables" aria-hidden="true">#</a> Create Tsfile-backed Hive tables</h3><p>To create a Tsfile-backed table, specify the <code>serde</code> as <code>org.apache.iotdb.hive.TsFileSerDe</code>, specify the <code>inputformat</code> as <code>org.apache.iotdb.hive.TSFHiveInputFormat</code>, and the <code>outputformat</code> as <code>org.apache.iotdb.hive.TSFHiveOutputFormat</code>.</p><p>Also provide a schema which only contains two fields: <code>time_stamp</code> and <code>sensor_id</code> for the table. <code>time_stamp</code> is the time value of the time series and <code>sensor_id</code> is the sensor name to extract from the tsfile to hive such as <code>sensor_1</code>. The name of the table can be any valid table names in hive.</p><p>Also a location provided for hive-connector to pull the most current data for the table.</p><p>The location should be a specific directory on your local file system or HDFS to set up Hadoop. If it is in your local file system, the location should look like <code>file:///data/data/sequence/root.baic2.WWS.leftfrontdoor/</code></p><p>Last, set the <code>device_id</code> in <code>TBLPROPERTIES</code> to the device name you want to analyze.</p><p>For example:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>CREATE EXTERNAL TABLE IF NOT EXISTS only_sensor_1(
  time_stamp TIMESTAMP,
  sensor_1 BIGINT)
ROW FORMAT SERDE &#39;org.apache.iotdb.hive.TsFileSerDe&#39;
STORED AS
  INPUTFORMAT &#39;org.apache.iotdb.hive.TSFHiveInputFormat&#39;
  OUTPUTFORMAT &#39;org.apache.iotdb.hive.TSFHiveOutputFormat&#39;
LOCATION &#39;/data/data/sequence/root.baic2.WWS.leftfrontdoor/&#39;
TBLPROPERTIES (&#39;device_id&#39;=&#39;root.baic2.WWS.leftfrontdoor.plc1&#39;);
</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>In this example, the data of <code>root.baic2.WWS.leftfrontdoor.plc1.sensor_1</code> is pulled from the directory of <code>/data/data/sequence/root.baic2.WWS.leftfrontdoor/</code>. This table results in a description as below:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>hive&gt; describe only_sensor_1;
OK
time_stamp          	timestamp              	from deserializer
sensor_1            	bigint              	from deserializer
Time taken: 0.053 seconds, Fetched: 2 row(s)
</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><p>At this point, the Tsfile-backed table can be worked with in Hive like any other table.</p><h3 id="query-from-tsfile-backed-hive-tables" tabindex="-1"><a class="header-anchor" href="#query-from-tsfile-backed-hive-tables" aria-hidden="true">#</a> Query from TsFile-backed Hive tables</h3><p>Before we do any queries, we should set the <code>hive.input.format</code> in hive by executing the following command.</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>hive&gt; set hive.input.format=org.apache.hadoop.hive.ql.io.HiveInputFormat;
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Now, we already have an external table named <code>only_sensor_1</code> in hive. We can use any query operations through HQL to analyse it.</p><p>For example:</p><h4 id="select-clause-example" tabindex="-1"><a class="header-anchor" href="#select-clause-example" aria-hidden="true">#</a> Select Clause Example</h4><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>hive&gt; select * from only_sensor_1 limit 10;
OK
1	1000000
2	1000001
3	1000002
4	1000003
5	1000004
6	1000005
7	1000006
8	1000007
9	1000008
10	1000009
Time taken: 1.464 seconds, Fetched: 10 row(s)
</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></div><h4 id="aggregate-clause-example" tabindex="-1"><a class="header-anchor" href="#aggregate-clause-example" aria-hidden="true">#</a> Aggregate Clause Example</h4><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>hive&gt; select count(*) from only_sensor_1;
WARNING: Hive-on-MR is deprecated in Hive 2 and may not be available in the future versions. Consider using a different execution engine (i.e. spark, tez) or using Hive 1.X releases.
Query ID = jackietien_20191016202416_d1e3e233-d367-4453-b39a-2aac9327a3b6
Total jobs = 1
Launching Job 1 out of 1
Number of reduce tasks determined at compile time: 1
In order to change the average load for a reducer (in bytes):
  set hive.exec.reducers.bytes.per.reducer=&lt;number&gt;
In order to limit the maximum number of reducers:
  set hive.exec.reducers.max=&lt;number&gt;
In order to set a constant number of reducers:
  set mapreduce.job.reduces=&lt;number&gt;
Job running in-process (local Hadoop)
2019-10-16 20:24:18,305 Stage-1 map = 0%,  reduce = 0%
2019-10-16 20:24:27,443 Stage-1 map = 100%,  reduce = 100%
Ended Job = job_local867757288_0002
MapReduce Jobs Launched:
Stage-Stage-1:  HDFS Read: 0 HDFS Write: 0 SUCCESS
Total MapReduce CPU Time Spent: 0 msec
OK
1000000
Time taken: 11.334 seconds, Fetched: 1 row(s)
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