<!DOCTYPE html><html lang="en"><head><meta charSet="utf-8"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><title>PostgreSQL Metadata Store · Apache Druid</title><meta name="viewport" content="width=device-width"/><link rel="canonical" href="https://druid.apache.org/docs/0.16.1-incubating/development/extensions-core/postgresql.html"/><meta name="generator" content="Docusaurus"/><meta name="description" content="&lt;!--"/><meta name="docsearch:language" content="en"/><meta name="docsearch:version" content="../../incubator-druid-website-src/" /><meta property="og:title" content="PostgreSQL Metadata Store · Apache Druid"/><meta property="og:type" content="website"/><meta property="og:url" content="https://druid.apache.org/index.html"/><meta property="og:description" content="&lt;!--"/><meta property="og:image" content="https://druid.apache.org/img/druid_nav.png"/><meta name="twitter:card" content="summary"/><meta name="twitter:image" content="https://druid.apache.org/img/druid_nav.png"/><link rel="shortcut icon" href="/img/favicon.png"/><link rel="stylesheet" href="https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.css"/><link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/styles/default.min.css"/><script async="" src="https://www.googletagmanager.com/gtag/js?id=UA-131010415-1"></script><script>
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width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/misc/math-expr.html">Expressions</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/misc/papers-and-talks.html">Papers</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Hidden<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/comparisons/druid-vs-elasticsearch.html">Apache Druid vs Elasticsearch</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/comparisons/druid-vs-key-value.html">Apache Druid vs. Key/Value Stores (HBase/Cassandra/OpenTSDB)</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/comparisons/druid-vs-kudu.html">Apache Druid vs Kudu</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/comparisons/druid-vs-redshift.html">Apache Druid vs Redshift</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/comparisons/druid-vs-spark.html">Apache Druid vs Spark</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/comparisons/druid-vs-sql-on-hadoop.html">Apache Druid vs SQL-on-Hadoop</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/design/auth.html">Authentication and Authorization</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/design/broker.html">Broker</a></li><li class="navListItem"><a class="navItem" 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href="/docs/0.16.1-incubating/development/extensions-core/approximate-histograms.html">Approximate Histogram aggregators</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/development/extensions-core/avro.html">Apache Avro</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/development/extensions-core/bloom-filter.html">Bloom Filter</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/development/extensions-core/datasketches-extension.html">DataSketches extension</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/development/extensions-core/datasketches-hll.html">DataSketches HLL Sketch module</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/development/extensions-core/datasketches-quantiles.html">DataSketches Quantiles Sketch module</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/development/extensions-core/datasketches-theta.html">DataSketches Theta Sketch module</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/development/extensions-core/datasketches-tuple.html">DataSketches Tuple Sketch module</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/development/extensions-core/druid-basic-security.html">Basic Security</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/development/extensions-core/druid-kerberos.html">Kerberos</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/development/extensions-core/druid-lookups.html">Cached Lookup Module</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/development/extensions-core/google.html">Google Cloud Storage</a></li><li class="navListItem"><a class="navItem" 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<p>To use this Apache Druid (incubating) extension, make sure to <a href="/docs/0.16.1-incubating/development/extensions.html#loading-extensions">include</a> <code>postgresql-metadata-storage</code> as an extension.</p>
<h2><a class="anchor" aria-hidden="true" id="setting-up-postgresql"></a><a href="#setting-up-postgresql" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Setting up PostgreSQL</h2>
<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/">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>
<pre><code class="hljs css language-bash">createuser druid -P
</code></pre>
<p>Create a druid database owned by the user we just created</p>
<pre><code class="hljs css language-bash">createdb druid -O druid
</code></pre>
<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>
<pre><code class="hljs css language-properties"><span class="hljs-meta">druid.extensions.loadList</span>=<span class="hljs-string">["postgresql-metadata-storage"]</span>
<span class="hljs-meta">druid.metadata.storage.type</span>=<span class="hljs-string">postgresql</span>
<span class="hljs-meta">druid.metadata.storage.connector.connectURI</span>=<span class="hljs-string">jdbc:postgresql://&lt;host&gt;/druid</span>
<span class="hljs-meta">druid.metadata.storage.connector.user</span>=<span class="hljs-string">druid</span>
<span class="hljs-meta">druid.metadata.storage.connector.password</span>=<span class="hljs-string">diurd</span>
</code></pre>
<h2><a class="anchor" aria-hidden="true" id="configuration"></a><a href="#configuration" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Configuration</h2>
<p>In most cases, the configuration options map directly to the <a href="https://jdbc.postgresql.org/documentation/head/connect.html">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/0.16.1-incubating/operations/password-provider.html">Password Provider</a> or String password for the client'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'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>
<h3><a class="anchor" aria-hidden="true" id="postgresql-firehose"></a><a href="#postgresql-firehose" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>PostgreSQL Firehose</h3>
<p>The PostgreSQL extension provides an implementation of an <a href="/docs/0.16.1-incubating/ingestion/native-batch.html#firehoses">SqlFirehose</a> which can be used to ingest data into Druid from a PostgreSQL database.</p>
<pre><code class="hljs css language-json">{
  <span class="hljs-attr">"type"</span>: <span class="hljs-string">"index"</span>,
  <span class="hljs-attr">"spec"</span>: {
    <span class="hljs-attr">"dataSchema"</span>: {
      <span class="hljs-attr">"dataSource"</span>: <span class="hljs-string">"some_datasource"</span>,
      <span class="hljs-attr">"parser"</span>: {
        <span class="hljs-attr">"parseSpec"</span>: {
          <span class="hljs-attr">"format"</span>: <span class="hljs-string">"timeAndDims"</span>,
          <span class="hljs-attr">"dimensionsSpec"</span>: {
            <span class="hljs-attr">"dimensionExclusions"</span>: [],
            <span class="hljs-attr">"dimensions"</span>: [
              <span class="hljs-string">"dim1"</span>,
              <span class="hljs-string">"dim2"</span>,
              <span class="hljs-string">"dim3"</span>
            ]
          },
          <span class="hljs-attr">"timestampSpec"</span>: {
            <span class="hljs-attr">"format"</span>: <span class="hljs-string">"auto"</span>,
            <span class="hljs-attr">"column"</span>: <span class="hljs-string">"ts"</span>
          }
        }
      },
      <span class="hljs-attr">"metricsSpec"</span>: [],
      <span class="hljs-attr">"granularitySpec"</span>: {
        <span class="hljs-attr">"type"</span>: <span class="hljs-string">"uniform"</span>,
        <span class="hljs-attr">"segmentGranularity"</span>: <span class="hljs-string">"DAY"</span>,
        <span class="hljs-attr">"queryGranularity"</span>: {
          <span class="hljs-attr">"type"</span>: <span class="hljs-string">"none"</span>
        },
        <span class="hljs-attr">"rollup"</span>: <span class="hljs-literal">false</span>,
        <span class="hljs-attr">"intervals"</span>: <span class="hljs-literal">null</span>
      },
      <span class="hljs-attr">"transformSpec"</span>: {
        <span class="hljs-attr">"filter"</span>: <span class="hljs-literal">null</span>,
        <span class="hljs-attr">"transforms"</span>: []
      }
    },
    <span class="hljs-attr">"ioConfig"</span>: {
      <span class="hljs-attr">"type"</span>: <span class="hljs-string">"index"</span>,
      <span class="hljs-attr">"firehose"</span>: {
        <span class="hljs-attr">"type"</span>: <span class="hljs-string">"sql"</span>,
        <span class="hljs-attr">"database"</span>: {
          <span class="hljs-attr">"type"</span>: <span class="hljs-string">"postgresql"</span>,
          <span class="hljs-attr">"connectorConfig"</span>: {
            <span class="hljs-attr">"connectURI"</span>: <span class="hljs-string">"jdbc:postgresql://some-rds-host.us-west-1.rds.amazonaws.com:5432/druid"</span>,
            <span class="hljs-attr">"user"</span>: <span class="hljs-string">"admin"</span>,
            <span class="hljs-attr">"password"</span>: <span class="hljs-string">"secret"</span>
          }
        },
        <span class="hljs-attr">"sqls"</span>: [
          <span class="hljs-string">"SELECT * FROM some_table"</span>
        ]
      }
    },
    <span class="hljs-attr">"tuningconfig"</span>: {
      <span class="hljs-attr">"type"</span>: <span class="hljs-string">"index"</span>
    }
  }
}
</code></pre>
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