<!DOCTYPE html><html lang="en"><head><meta charSet="utf-8"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><title>Query data with Pulsar SQL · Apache Pulsar</title><meta name="viewport" content="width=device-width, initial-scale=1.0"/><meta name="generator" content="Docusaurus"/><meta name="description" content="Before querying data in Pulsar, you need to install Pulsar and built-in connectors. "/><meta name="docsearch:version" content="2.6.2"/><meta name="docsearch:language" content="en"/><meta property="og:title" content="Query data with Pulsar SQL · Apache Pulsar"/><meta property="og:type" content="website"/><meta property="og:url" content="https://pulsar.apache.org/"/><meta property="og:description" content="Before querying data in Pulsar, you need to install Pulsar and built-in connectors. "/><meta name="twitter:card" content="summary"/><meta name="twitter:image" content="https://pulsar.apache.org/img/pulsar.svg"/><link rel="shortcut icon" href="/img/pulsar.ico"/><link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/styles/atom-one-dark.min.css"/><link rel="alternate" type="application/atom+xml" href="https://pulsar.apache.org/blog/atom.xml" title="Apache Pulsar Blog ATOM Feed"/><link rel="alternate" type="application/rss+xml" href="https://pulsar.apache.org/blog/feed.xml" title="Apache Pulsar Blog RSS Feed"/><link rel="stylesheet" href="/css/code-blocks-buttons.css"/><script type="text/javascript" src="https://buttons.github.io/buttons.js"></script><script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.0/clipboard.min.js"></script><script type="text/javascript" src="/js/custom.js"></script><script src="/js/scrollSpy.js"></script><link rel="stylesheet" href="/css/main.css"/><script src="/js/codetabs.js"></script></head><body class="sideNavVisible separateOnPageNav"><div class="fixedHeaderContainer"><div class="headerWrapper wrapper"><header><a href="/en"><img class="logo" src="/img/pulsar.svg" alt="Apache Pulsar"/></a><a href="/en/versions"><h3>2.6.2</h3></a><div class="navigationWrapper navigationSlider"><nav class="slidingNav"><ul class="nav-site nav-site-internal"><li class="siteNavGroupActive"><a href="/docs/en/2.6.2/getting-started-standalone" target="_self">Docs</a></li><li class=""><a href="/en/download" target="_self">Download</a></li><li class="siteNavGroupActive"><a href="/docs/en/2.6.2/client-libraries" target="_self">Clients</a></li><li class=""><a href="#restapis" target="_self">REST APIs</a></li><li class=""><a href="#cli" target="_self">Cli</a></li><li class=""><a href="/blog/" target="_self">Blog</a></li><li class=""><a href="#community" target="_self">Community</a></li><li class=""><a href="#apache" target="_self">Apache</a></li><li class=""><a href="https://pulsar-next.staged.apache.org/" target="_self">New Website (Beta)</a></li><span><li><a id="languages-menu" href="#"><img class="languages-icon" src="/img/language.svg" alt="Languages icon"/>English</a><div id="languages-dropdown" class="hide"><ul id="languages-dropdown-items"><li><a href="/docs/ja/2.6.2/sql-getting-started">日本語</a></li><li><a href="/docs/fr/2.6.2/sql-getting-started">Français</a></li><li><a href="/docs/ko/2.6.2/sql-getting-started">한국어</a></li><li><a href="/docs/zh-CN/2.6.2/sql-getting-started">中文</a></li><li><a href="/docs/zh-TW/2.6.2/sql-getting-started">繁體中文</a></li><li><a href="https://crowdin.com/project/apache-pulsar" target="_blank" rel="noreferrer noopener">Help Translate</a></li></ul></div></li><script>
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<h2><a class="anchor" aria-hidden="true" id="requirements"></a><a href="#requirements" 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>Requirements</h2>
<ol>
<li>Install <a href="/docs/en/2.6.2/getting-started-standalone#install-pulsar-standalone">Pulsar</a>.</li>
<li>Install Pulsar <a href="/docs/en/2.6.2/getting-started-standalone#install-builtin-connectors-optional">built-in connectors</a>.</li>
</ol>
<h2><a class="anchor" aria-hidden="true" id="query-data-in-pulsar"></a><a href="#query-data-in-pulsar" 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>Query data in Pulsar</h2>
<p>To query data in Pulsar with Pulsar SQL, complete the following steps.</p>
<ol>
<li>Start a Pulsar standalone cluster.</li>
</ol>
<pre><code class="hljs css language-bash">./bin/pulsar standalone
</code></pre>
<ol start="2">
<li>Start a Pulsar SQL worker.</li>
</ol>
<pre><code class="hljs css language-bash">./bin/pulsar sql-worker run
</code></pre>
<ol start="3">
<li>After initializing Pulsar standalone cluster and the SQL worker, run SQL CLI.</li>
</ol>
<pre><code class="hljs css language-bash">./bin/pulsar sql
</code></pre>
<ol start="4">
<li>Test with SQL commands.</li>
</ol>
<pre><code class="hljs css language-bash">presto&gt; show catalogs;
 Catalog 
---------
 pulsar  
 system  
(2 rows)

Query 20180829_211752_00004_7qpwh, FINISHED, 1 node
Splits: 19 total, 19 <span class="hljs-keyword">done</span> (100.00%)
0:00 [0 rows, 0B] [0 rows/s, 0B/s]


presto&gt; show schemas <span class="hljs-keyword">in</span> pulsar;
        Schema         
-----------------------
 information_schema    
 public/default        
 public/<span class="hljs-built_in">functions</span>      
 sample/standalone/ns1 
(4 rows)

Query 20180829_211818_00005_7qpwh, FINISHED, 1 node
Splits: 19 total, 19 <span class="hljs-keyword">done</span> (100.00%)
0:00 [4 rows, 89B] [21 rows/s, 471B/s]


presto&gt; show tables <span class="hljs-keyword">in</span> pulsar.<span class="hljs-string">"public/default"</span>;
 Table 
-------
(0 rows)

Query 20180829_211839_00006_7qpwh, FINISHED, 1 node
Splits: 19 total, 19 <span class="hljs-keyword">done</span> (100.00%)
0:00 [0 rows, 0B] [0 rows/s, 0B/s]

</code></pre>
<p>Since there is no data in Pulsar, no records is returned.</p>
<ol start="5">
<li>Start the built-in connector <em>DataGeneratorSource</em> and ingest some mock data.</li>
</ol>
<pre><code class="hljs css language-bash">./bin/pulsar-admin sources create --name generator --destinationTopicName generator_test --<span class="hljs-built_in">source</span>-type data-generator
</code></pre>
<p>And then you can query a topic in the namespace &quot;public/default&quot;.</p>
<pre><code class="hljs css language-bash">presto&gt; show tables <span class="hljs-keyword">in</span> pulsar.<span class="hljs-string">"public/default"</span>;
     Table      
----------------
 generator_test 
(1 row)

Query 20180829_213202_00000_csyeu, FINISHED, 1 node
Splits: 19 total, 19 <span class="hljs-keyword">done</span> (100.00%)
0:02 [1 rows, 38B] [0 rows/s, 17B/s]
</code></pre>
<p>You can now query the data within the topic &quot;generator_test&quot;.</p>
<pre><code class="hljs css language-bash">presto&gt; select * from pulsar.<span class="hljs-string">"public/default"</span>.generator_test;

  firstname  | middlename  |  lastname   |              email               |   username   | password | telephonenumber | age |                 companyemail                  | nationalidentitycardnumber | 
-------------+-------------+-------------+----------------------------------+--------------+----------+-----------------+-----+-----------------------------------------------+----------------------------+
 Genesis     | Katherine   | Wiley       | genesis.wiley@gmail.com          | genesisw     | y9D2dtU3 | 959-197-1860    |  71 | genesis.wiley@interdemconsulting.eu           | 880-58-9247                |   
 Brayden     |             | Stanton     | brayden.stanton@yahoo.com        | braydens     | ZnjmhXik | 220-027-867     |  81 | brayden.stanton@supermemo.eu                  | 604-60-7069                |   
 Benjamin    | Julian      | Velasquez   | benjamin.velasquez@yahoo.com     | benjaminv    | 8Bc7m3eb | 298-377-0062    |  21 | benjamin.velasquez@hostesltd.biz              | 213-32-5882                |   
 Michael     | Thomas      | Donovan     | donovan@mail.com                 | michaeld     | OqBm9MLs | 078-134-4685    |  55 | michael.donovan@memortech.eu                  | 443-30-3442                |   
 Brooklyn    | Avery       | Roach       | brooklynroach@yahoo.com          | broach       | IxtBLafO | 387-786-2998    |  68 | brooklyn.roach@warst.biz                      | 085-88-3973                |   
 Skylar      |             | Bradshaw    | skylarbradshaw@yahoo.com         | skylarb      | p6eC6cKy | 210-872-608     |  96 | skylar.bradshaw@flyhigh.eu                    | 453-46-0334                |    
.
.
.
</code></pre>
<p>You can query the mock data.</p>
<h2><a class="anchor" aria-hidden="true" id="query-your-own-data"></a><a href="#query-your-own-data" 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>Query your own data</h2>
<p>If you want to query your own data, you need to ingest your own data first. You can write a simple producer and write custom defined data to Pulsar. The following is an example.</p>
<pre><code class="hljs css language-java">public class TestProducer {

    public static class Foo {
        private int field1 = 1;
        private String field2;
        private long field3;

        public Foo() {
        }

        public int getField1() {
            return field1;
        }

        public void setField1(int field1) {
            this.field1 = field1;
        }

        public String getField2() {
            return field2;
        }

        public void setField2(String field2) {
            this.field2 = field2;
        }

        public long getField3() {
            return field3;
        }

        public void setField3(long field3) {
            this.field3 = field3;
        }
    }

    public static void main(String[] args) throws Exception {
        PulsarClient pulsarClient = PulsarClient.builder().serviceUrl("pulsar://localhost:6650").build();
        Producer&lt;Foo&gt; producer = pulsarClient.newProducer(AvroSchema.of(Foo.class)).topic("test_topic").create();

        for (int i = 0; i &lt; 1000; i++) {
            Foo foo = new Foo();
            foo.setField1(i);
            foo.setField2("foo" + i);
            foo.setField3(System.currentTimeMillis());
            producer.newMessage().value(foo).send();
        }
        producer.close();
        pulsarClient.close();
    }
}
</code></pre>
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