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itemprop="position" content="3"></li></ul></nav><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><header><h1>Export query results</h1></header><p>This tutorial demonstrates how to use the Apache Druid® SQL <a href="/docs/latest/multi-stage-query/reference#extern-function">EXTERN</a> function to export data.</p> |
| <h2 class="anchor anchorWithStickyNavbar_LWe7" id="prerequisites">Prerequisites<a href="#prerequisites" class="hash-link" aria-label="Direct link to Prerequisites" title="Direct link to Prerequisites"></a></h2> |
| <p>Before you follow the steps in this tutorial, download Druid as described in the <a href="/docs/latest/tutorials/">Local quickstart</a>. |
| Don't start Druid, you'll do that as part of the tutorial.</p> |
| <p>You should be familiar with ingesting and querying data in Druid. |
| If you haven't already, go through the <a href="/docs/latest/tutorials/tutorial-query">Query data</a> tutorial first.</p> |
| <h2 class="anchor anchorWithStickyNavbar_LWe7" id="export-query-results-to-the-local-file-system">Export query results to the local file system<a href="#export-query-results-to-the-local-file-system" class="hash-link" aria-label="Direct link to Export query results to the local file system" title="Direct link to Export query results to the local file system"></a></h2> |
| <p>This example demonstrates how to configure Druid to export data to the local file system. |
| While you can use this approach to learn about EXTERN syntax for exporting data, it's not suitable for production scenarios.</p> |
| <h3 class="anchor anchorWithStickyNavbar_LWe7" id="configure-druid-local-export-directory">Configure Druid local export directory<a href="#configure-druid-local-export-directory" class="hash-link" aria-label="Direct link to Configure Druid local export directory" title="Direct link to Configure Druid local export directory"></a></h3> |
| <p>The following commands set the base path for the Druid exports to <code>/tmp/druid/</code>. |
| If the account running Druid doesn't have access to <code>/tmp/druid/</code>, change the path. |
| For example: <code>/Users/Example/druid</code>. |
| If you change the path in this step, use the updated path in all subsequent steps.</p> |
| <p>From the root of the Druid distribution, run the following:</p> |
| <div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-bash codeBlock_bY9V thin-scrollbar" style="color:#bfc7d5;background-color:#292d3e"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">export export_path="/tmp/druid"</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">sed -i -e $'$a\\\n\\\n\\\n#\\\n###Local export\\\n#\\\ndruid.export.storage.baseDir='$export_path' conf/druid/auto/_common/common.runtime.properties</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div> |
| <p>This adds the following section to the Druid <code>common.runtime.properties</code> configuration file located in <code>conf/druid/auto/_common</code>:</p> |
| <div class="codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-text codeBlock_bY9V thin-scrollbar" style="color:#bfc7d5;background-color:#292d3e"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">#</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">###Local export</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">#</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">druid.export.storage.baseDir=/tmp/druid/</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div> |
| <h3 class="anchor anchorWithStickyNavbar_LWe7" id="start-druid-and-load-sample-data">Start Druid and load sample data<a href="#start-druid-and-load-sample-data" class="hash-link" aria-label="Direct link to Start Druid and load sample data" title="Direct link to Start Druid and load sample data"></a></h3> |
| <ol> |
| <li> |
| <p>From the root of the Druid distribution, launch Druid as follows:</p> |
| <div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-bash codeBlock_bY9V thin-scrollbar" style="color:#bfc7d5;background-color:#292d3e"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">./bin/start-druid</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div> |
| </li> |
| <li> |
| <p>After Druid starts, open <a href="http://localhost:8888/" target="_blank" rel="noopener noreferrer">http://localhost:8888/</a> in your browser to access the Web Console.</p> |
| </li> |
| <li> |
| <p>From the <a href="http://localhost:8888/unified-console.html#workbench" target="_blank" rel="noopener noreferrer">Query view</a>, run the following command to load the Wikipedia example data set:</p> |
| <div class="language-sql codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-sql codeBlock_bY9V thin-scrollbar" style="color:#bfc7d5;background-color:#292d3e"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token keyword" style="font-style:italic">REPLACE</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">INTO</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"wikipedia"</span><span class="token plain"> OVERWRITE </span><span class="token keyword" style="font-style:italic">ALL</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token keyword" style="font-style:italic">WITH</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"ext"</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">AS</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token keyword" style="font-style:italic">SELECT</span><span class="token plain"> </span><span class="token operator" style="color:rgb(137, 221, 255)">*</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token keyword" style="font-style:italic">FROM</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">TABLE</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> EXTERN</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">'{"type":"http","uris":["https://druid.apache.org/data/wikipedia.json.gz"]}'</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">'{"type":"json"}'</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"> EXTEND </span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token string" style="color:rgb(195, 232, 141)">"isRobot"</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">VARCHAR</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"channel"</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">VARCHAR</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"timestamp"</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">VARCHAR</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"flags"</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">VARCHAR</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"isUnpatrolled"</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">VARCHAR</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"page"</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">VARCHAR</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"diffUrl"</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">VARCHAR</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"added"</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">BIGINT</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"comment"</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">VARCHAR</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"commentLength"</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">BIGINT</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"isNew"</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">VARCHAR</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"isMinor"</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">VARCHAR</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"delta"</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">BIGINT</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"isAnonymous"</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">VARCHAR</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"user"</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">VARCHAR</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"deltaBucket"</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">BIGINT</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"deleted"</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">BIGINT</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"namespace"</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">VARCHAR</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"cityName"</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">VARCHAR</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"countryName"</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">VARCHAR</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"regionIsoCode"</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">VARCHAR</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"metroCode"</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">BIGINT</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"countryIsoCode"</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">VARCHAR</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"regionName"</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">VARCHAR</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token keyword" style="font-style:italic">SELECT</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> TIME_PARSE</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token string" style="color:rgb(195, 232, 141)">"timestamp"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">AS</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"__time"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"isRobot"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"channel"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"flags"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"isUnpatrolled"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"page"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"diffUrl"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"added"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"comment"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"commentLength"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"isNew"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"isMinor"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"delta"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"isAnonymous"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"user"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"deltaBucket"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"deleted"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"namespace"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"cityName"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"countryName"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"regionIsoCode"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"metroCode"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"countryIsoCode"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"regionName"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token keyword" style="font-style:italic">FROM</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"ext"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">PARTITIONED </span><span class="token keyword" style="font-style:italic">BY</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">DAY</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div> |
| </li> |
| </ol> |
| <h3 class="anchor anchorWithStickyNavbar_LWe7" id="query-to-export-data">Query to export data<a href="#query-to-export-data" class="hash-link" aria-label="Direct link to Query to export data" title="Direct link to Query to export data"></a></h3> |
| <p>Open a new tab and run the following query to export query results to the path: |
| <code>/tmp/druid/wiki_example</code>. |
| The path must be a subdirectory of the <code>druid.export.storage.baseDir</code>.</p> |
| <div class="language-sql codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-sql codeBlock_bY9V thin-scrollbar" style="color:#bfc7d5;background-color:#292d3e"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token keyword" style="font-style:italic">INSERT</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">INTO</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> EXTERN</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token keyword" style="font-style:italic">local</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token plain">exportPath </span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token operator" style="color:rgb(137, 221, 255)">></span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">'/tmp/druid/wiki_example'</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token keyword" style="font-style:italic">AS</span><span class="token plain"> CSV</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token keyword" style="font-style:italic">SELECT</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"channel"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token function" style="color:rgb(130, 170, 255)">SUM</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token string" style="color:rgb(195, 232, 141)">"delta"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">AS</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"changes"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token keyword" style="font-style:italic">FROM</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"wikipedia"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token keyword" style="font-style:italic">GROUP</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">BY</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">1</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token keyword" style="font-style:italic">LIMIT</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">10</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div> |
| <p>Druid exports the results of the query to the <code>/tmp/druid/wiki_example</code> directory. |
| Run the following command to list the contents of</p> |
| <div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-bash codeBlock_bY9V thin-scrollbar" style="color:#bfc7d5;background-color:#292d3e"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">ls /tmp/druid/wiki_example</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div> |
| <p>The results are a CSV file export of the data and a directory.</p> |
| <h2 class="anchor anchorWithStickyNavbar_LWe7" id="export-query-results-to-cloud-storage">Export query results to cloud storage<a href="#export-query-results-to-cloud-storage" class="hash-link" aria-label="Direct link to Export query results to cloud storage" title="Direct link to Export query results to cloud storage"></a></h2> |
| <p>The steps to export to cloud storage are similar to exporting to the local file system. |
| Druid supports Amazon S3 or Google Cloud Storage (GCS) as cloud storage destinations.</p> |
| <ol> |
| <li> |
| <p>Enable the extension for your cloud storage destination. See <a href="/docs/latest/configuration/extensions#loading-core-extensions">Loading core extensions</a>.</p> |
| <ul> |
| <li><strong>Amazon S3</strong>: <code>druid-s3-extensions</code></li> |
| <li><strong>GCS</strong>: <code>google-extensions</code> |
| See <a href="/docs/latest/configuration/extensions#loading-core-extensions">Loading core extensions</a> for more information.</li> |
| </ul> |
| </li> |
| <li> |
| <p>Configure the additional properties for your cloud storage destination. Replace <code>{CLOUD}</code> with <code>s3</code> or <code>google</code> accordingly:</p> |
| <ul> |
| <li><code>druid.export.storage.{CLOUD}.tempLocalDir</code>: Local temporary directory where the query engine stages files to export.</li> |
| <li><code>druid.export.storage.{CLOUD}.allowedExportPaths</code>: S3 or GS prefixes allowed as Druid export locations. For example <code>[\"s3://bucket1/export/\",\"s3://bucket2/export/\"]</code> or <code>[\"gs://bucket1/export/\", \"gs://bucket2/export/\"]</code>.</li> |
| <li><code>druid.export.storage.{CLOUD}.maxRetry</code>: Maximum number of times to attempt cloud API calls to avoid failures from transient errors.</li> |
| <li><code>druid.export.storage.s3.chunkSize</code>: Maximum size of individual data chunks to store in the temporary directory.</li> |
| </ul> |
| </li> |
| <li> |
| <p>Verify the instance role has the correct permissions to the bucket and folders: read, write, create, and delete. See <a href="/docs/latest/multi-stage-query/security#permissions-for-durable-storage">Permissions for durable storage</a>.</p> |
| </li> |
| <li> |
| <p>Use the query syntax for your cloud storage type. For example:</p> |
| <div class="tabs-container tabList__CuJ"><ul role="tablist" aria-orientation="horizontal" class="tabs"><li role="tab" tabindex="0" aria-selected="true" class="tabs__item tabItem_LNqP tabs__item--active">S3</li><li role="tab" tabindex="-1" aria-selected="false" class="tabs__item tabItem_LNqP">GCS</li></ul><div class="margin-top--md"><div role="tabpanel" class="tabItem_Ymn6"><div class="language-sql codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-sql codeBlock_bY9V thin-scrollbar" style="color:#bfc7d5;background-color:#292d3e"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token keyword" style="font-style:italic">INSERT</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">INTO</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">EXTERN</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> s3</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token plain">bucket </span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token operator" style="color:rgb(137, 221, 255)">></span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">'your_bucket'</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> prefix </span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token operator" style="color:rgb(137, 221, 255)">></span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">'prefix/to/files'</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token keyword" style="font-style:italic">AS</span><span class="token plain"> CSV</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token keyword" style="font-style:italic">SELECT</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"channel"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token function" style="color:rgb(130, 170, 255)">SUM</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token string" style="color:rgb(195, 232, 141)">"delta"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">AS</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"changes"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token keyword" style="font-style:italic">FROM</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"wikipedia"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token keyword" style="font-style:italic">GROUP</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">BY</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">1</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token keyword" style="font-style:italic">LIMIT</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">10</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></div><div role="tabpanel" class="tabItem_Ymn6" hidden=""><div class="language-sql codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-sql codeBlock_bY9V thin-scrollbar" style="color:#bfc7d5;background-color:#292d3e"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token keyword" style="font-style:italic">INSERT</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">INTO</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">EXTERN</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> google</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token plain">bucket </span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token operator" style="color:rgb(137, 221, 255)">></span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">'your_bucket'</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"> prefix </span><span class="token operator" style="color:rgb(137, 221, 255)">=</span><span class="token operator" style="color:rgb(137, 221, 255)">></span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">'prefix/to/files'</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token keyword" style="font-style:italic">AS</span><span class="token plain"> CSV</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token keyword" style="font-style:italic">SELECT</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"channel"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token function" style="color:rgb(130, 170, 255)">SUM</span><span class="token punctuation" style="color:rgb(199, 146, 234)">(</span><span class="token string" style="color:rgb(195, 232, 141)">"delta"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">)</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">AS</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"changes"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token keyword" style="font-style:italic">FROM</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"wikipedia"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token keyword" style="font-style:italic">GROUP</span><span class="token plain"> </span><span class="token keyword" style="font-style:italic">BY</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">1</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token keyword" style="font-style:italic">LIMIT</span><span class="token plain"> </span><span class="token number" style="color:rgb(247, 140, 108)">10</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></div></div></div> |
| </li> |
| <li> |
| <p>When querying, use the <code>rowsPerPage</code> query context parameter to restrict the output file size. While it's possible to add a very large LIMIT at the end of your query to force Druid to create a single file, we don't recommend this technique.</p> |
| </li> |
| </ol> |
| <h2 class="anchor anchorWithStickyNavbar_LWe7" id="learn-more">Learn more<a href="#learn-more" class="hash-link" aria-label="Direct link to Learn more" title="Direct link to Learn more"></a></h2> |
| <p>See the following topics for more information:</p> |
| <ul> |
| <li><a href="/docs/latest/multi-stage-query/reference#extern-to-export-to-a-destination">Export to a destination</a> for a reference of the EXTERN.</li> |
| <li><a href="/docs/latest/multi-stage-query/security#permissions-for-durable-storage">SQL-based ingestion security</a> for cloud permission requirements for MSQ.</li> |
| </ul></div></article><nav class="pagination-nav docusaurus-mt-lg" aria-label="Docs pages"><a class="pagination-nav__link pagination-nav__link--prev" href="/docs/latest/tutorials/tutorial-latest-by"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">Query for latest data</div></a><a class="pagination-nav__link pagination-nav__link--next" href="/docs/latest/tutorials/tutorial-sketches-theta"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">Theta sketches tutorial</div></a></nav></div></div><div class="col col--3"><div class="tableOfContents_bqdL thin-scrollbar theme-doc-toc-desktop"><ul class="table-of-contents table-of-contents__left-border"><li><a href="#prerequisites" class="table-of-contents__link toc-highlight">Prerequisites</a></li><li><a href="#export-query-results-to-the-local-file-system" class="table-of-contents__link toc-highlight">Export query results to the local file system</a><ul><li><a href="#configure-druid-local-export-directory" class="table-of-contents__link toc-highlight">Configure Druid local export directory</a></li><li><a href="#start-druid-and-load-sample-data" class="table-of-contents__link toc-highlight">Start Druid and load sample data</a></li><li><a href="#query-to-export-data" class="table-of-contents__link toc-highlight">Query to export data</a></li></ul></li><li><a href="#export-query-results-to-cloud-storage" class="table-of-contents__link toc-highlight">Export query results to cloud storage</a></li><li><a href="#learn-more" class="table-of-contents__link toc-highlight">Learn more</a></li></ul></div></div></div></div></main></div></div></div><footer class="footer"><div class="container container-fluid"><div class="footer__bottom text--center"><div class="margin-bottom--sm"><img src="/img/favicon.png" class="footer__logo themedComponent_mlkZ themedComponent--light_NVdE"><img src="/img/favicon.png" class="footer__logo themedComponent_mlkZ themedComponent--dark_xIcU"></div><div class="footer__copyright">Copyright © 2025 Apache Software Foundation. Except where otherwise noted, licensed under CC BY-SA 4.0. Apache Druid, Druid, and the Druid logo are either registered trademarks or trademarks of The Apache Software Foundation in the United States and other countries.</div></div></div></footer></div> |
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