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aria-label="Scroll back to top" class="clean-btn theme-back-to-top-button backToTopButton_sjWU" type="button"></button><div class="docRoot_UBD9"><main class="docMainContainer_TBSr docMainContainerEnhanced_lQrH"><div class="container padding-top--md padding-bottom--lg"><div class="row"><div class="col docItemCol_VOVn"><div class="docItemContainer_Djhp"><article><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>PostgreSQL metadata store</h1></header><p>To use this Apache Druid extension, <a href="/docs/latest/configuration/extensions#loading-extensions">include</a> <code>postgresql-metadata-storage</code> in the extensions load list.</p>
 <p>With the  PostgreSQL extension, you can use PostgreSQL as a metadata store or ingest from a PostgreSQL database.</p>
 <h2 class="anchor anchorWithStickyNavbar_LWe7" id="set-up-postgresql">Set up PostgreSQL<a href="#set-up-postgresql" class="hash-link" aria-label="Direct link to Set up PostgreSQL" title="Direct link to Set up PostgreSQL"></a></h2>
 <p>To avoid issues with upgrades that require schema changes to a large metadata table, consider a PostgreSQL version that supports instant ADD COLUMN semantics.</p>
 <ol>
 <li>Install PostgreSQL</li>
 </ol>
 <p>Use your favorite package manager to install PostgreSQL, e.g.:</p>
 <ul>
 <li>on Ubuntu/Debian using apt <code>apt-get install postgresql</code></li>
 <li>on OS X, using <a href="http://brew.sh/" target="_blank" rel="noopener noreferrer">Homebrew</a> <code>brew install postgresql</code></li>
 </ul>
 <ol start="2">
 <li>Create a druid database and user</li>
 </ol>
 <p>On the machine where PostgreSQL is installed, using an account with proper
 postgresql permissions:</p>
 <p>Create a druid user, enter <code>diurd</code> when prompted for the password.</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">createuser druid -P</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>Create a druid database owned by the user we just created</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">createdb druid -O 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>
 <p><em>Note:</em> On Ubuntu / Debian you may have to prefix the <code>createuser</code> and
 <code>createdb</code> commands with <code>sudo -u postgres</code> in order to gain proper
 permissions.</p>
 <ol start="3">
 <li>Configure your Druid metadata storage extension:</li>
 </ol>
 <p>Add the following parameters to your Druid configuration, replacing <code>&lt;host&gt;</code>
 with the location (host name and port) of the database.</p>
 <div class="language-properties codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-properties 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">druid.extensions.loadList=[&quot;postgresql-metadata-storage&quot;]</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">druid.metadata.storage.type=postgresql</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">druid.metadata.storage.connector.connectURI=jdbc:postgresql://&lt;host&gt;/druid</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">druid.metadata.storage.connector.user=druid</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">druid.metadata.storage.connector.password=diurd</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>
 <h2 class="anchor anchorWithStickyNavbar_LWe7" id="configuration-properties">Configuration properties<a href="#configuration-properties" class="hash-link" aria-label="Direct link to Configuration properties" title="Direct link to Configuration properties"></a></h2>
 <p>In most cases, the configuration options map directly to the <a href="https://jdbc.postgresql.org/documentation/use/#connecting-to-the-database" target="_blank" rel="noopener noreferrer">postgres JDBC connection options</a>.</p>
 <table><thead><tr><th>Property</th><th>Description</th><th>Default</th><th>Required</th></tr></thead><tbody><tr><td><code>druid.metadata.postgres.ssl.useSSL</code></td><td>Enables SSL</td><td><code>false</code></td><td>no</td></tr><tr><td><code>druid.metadata.postgres.ssl.sslPassword</code></td><td>The <a href="/docs/latest/operations/password-provider">Password Provider</a> or String password for the client&#x27;s key.</td><td>none</td><td>no</td></tr><tr><td><code>druid.metadata.postgres.ssl.sslFactory</code></td><td>The class name to use as the <code>SSLSocketFactory</code></td><td>none</td><td>no</td></tr><tr><td><code>druid.metadata.postgres.ssl.sslFactoryArg</code></td><td>An optional argument passed to the sslFactory&#x27;s constructor</td><td>none</td><td>no</td></tr><tr><td><code>druid.metadata.postgres.ssl.sslMode</code></td><td>The sslMode. Possible values are &quot;disable&quot;, &quot;require&quot;, &quot;verify-ca&quot;, &quot;verify-full&quot;, &quot;allow&quot; and &quot;prefer&quot;</td><td>none</td><td>no</td></tr><tr><td><code>druid.metadata.postgres.ssl.sslCert</code></td><td>The full path to the certificate file.</td><td>none</td><td>no</td></tr><tr><td><code>druid.metadata.postgres.ssl.sslKey</code></td><td>The full path to the key file.</td><td>none</td><td>no</td></tr><tr><td><code>druid.metadata.postgres.ssl.sslRootCert</code></td><td>The full path to the root certificate.</td><td>none</td><td>no</td></tr><tr><td><code>druid.metadata.postgres.ssl.sslHostNameVerifier</code></td><td>The classname of the hostname verifier.</td><td>none</td><td>no</td></tr><tr><td><code>druid.metadata.postgres.ssl.sslPasswordCallback</code></td><td>The classname of the SSL password provider.</td><td>none</td><td>no</td></tr><tr><td><code>druid.metadata.postgres.dbTableSchema</code></td><td>druid meta table schema</td><td><code>public</code></td><td>no</td></tr></tbody></table>
 <h2 class="anchor anchorWithStickyNavbar_LWe7" id="postgresql-input-source">PostgreSQL input source<a href="#postgresql-input-source" class="hash-link" aria-label="Direct link to PostgreSQL input source" title="Direct link to PostgreSQL input source"></a></h2>
 <p>The PostgreSQL extension provides an implementation of an SQL input source to ingest data into Druid from a PostgreSQL database.
 For more information on the input source parameters, see <a href="/docs/latest/ingestion/input-sources#sql-input-source">SQL input source</a>.</p>
 <div class="language-json codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-json codeBlock_bY9V thin-scrollbar" style="color:#bfc7d5;background-color:#292d3e"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><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 property">&quot;type&quot;</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)">&quot;index_parallel&quot;</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 property">&quot;spec&quot;</span><span class="token operator" style="color:rgb(137, 221, 255)">:</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 property">&quot;dataSchema&quot;</span><span class="token operator" style="color:rgb(137, 221, 255)">:</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 property">&quot;dataSource&quot;</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, 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class="token-line" style="color:#bfc7d5"><span class="token plain">        </span><span class="token property">&quot;queryGranularity&quot;</span><span class="token operator" style="color:rgb(137, 221, 255)">:</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 property">&quot;type&quot;</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)">&quot;none&quot;</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 punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token 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class="token property">&quot;transforms&quot;</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </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 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 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 property">&quot;ioConfig&quot;</span><span class="token operator" 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property">&quot;tuningConfig&quot;</span><span class="token operator" style="color:rgb(137, 221, 255)">:</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 property">&quot;type&quot;</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)">&quot;index_parallel&quot;</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"></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><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></article><nav class="pagination-nav docusaurus-mt-lg" aria-label="Docs pages"></nav></div></div><div class="col col--3"><div class="tableOfContents_bqdL thin-scrollbar 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