<!DOCTYPE html><html lang="en"><head><meta charSet="utf-8"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><title>Data deletion · Apache Druid</title><meta name="viewport" content="width=device-width, initial-scale=1.0"/><link rel="canonical" href="https://druid.apache.org/docs/latest/data-management/delete.html"/><meta name="generator" content="Docusaurus"/><meta name="description" content="&lt;!--"/><meta name="docsearch:language" content="en"/><meta name="docsearch:version" content="26.0.0" /><meta property="og:title" content="Data deletion · 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/npm/docsearch.js@2/dist/cdn/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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sketches</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/tutorials/tutorial-retention.html">Configuring data retention</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/tutorials/tutorial-update-data.html">Updating existing data</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/tutorials/tutorial-compaction.html">Compacting segments</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/tutorials/tutorial-delete-data.html">Deleting data</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/tutorials/tutorial-ingestion-spec.html">Writing an ingestion spec</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/tutorials/tutorial-transform-spec.html">Transforming input data</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/tutorials/docker.html">Tutorial: Run with Docker</a></li><li class="navListItem"><a class="navItem" 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href="/docs/latest/ingestion/migrate-from-firehose.html">Migrate from firehose</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/ingestion/hadoop.html">Hadoop-based</a></li></ul></div><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">SQL-based ingestion 🆕</h4><ul><li class="navListItem"><a class="navItem" href="/docs/latest/multi-stage-query/index.html">Overview</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/multi-stage-query/concepts.html">Key concepts</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/multi-stage-query/api.html">API</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/multi-stage-query/security.html">Security</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/multi-stage-query/examples.html">Examples</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/multi-stage-query/reference.html">Reference</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/multi-stage-query/known-issues.html">Known issues</a></li></ul></div><li class="navListItem"><a class="navItem" href="/docs/latest/ingestion/tasks.html">Task reference</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/ingestion/faq.html">Troubleshooting FAQ</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Data management<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/latest/data-management/index.html">Overview</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/data-management/update.html">Data updates</a></li><li class="navListItem navListItemActive"><a class="navItem" href="/docs/latest/data-management/delete.html">Data deletion</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/data-management/schema-changes.html">Schema changes</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/data-management/compaction.html">Compaction</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/data-management/automatic-compaction.html">Automatic compaction</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Querying<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"><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Druid SQL</h4><ul><li class="navListItem"><a class="navItem" href="/docs/latest/querying/sql.html">Overview and syntax</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/querying/sql-data-types.html">SQL data types</a></li><li 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href="/docs/latest/querying/sorting-orders.html">String comparators</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/querying/virtual-columns.html">Virtual columns</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/development/geo.html">Spatial filters</a></li></ul></div></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Configuration<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/latest/configuration/index.html">Configuration reference</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/development/extensions.html">Extensions</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/configuration/logging.html">Logging</a></li></ul></div><div 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href="/docs/latest/operations/rule-configuration.html">Using rules to drop and retain data</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/operations/other-hadoop.html">Working with different versions of Apache Hadoop</a></li><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Misc</h4><ul><li class="navListItem"><a class="navItem" href="/docs/latest/operations/dump-segment.html">dump-segment tool</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/operations/reset-cluster.html">reset-cluster tool</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/operations/insert-segment-to-db.html">insert-segment-to-db tool</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/operations/pull-deps.html">pull-deps tool</a></li><li class="navListItem"><a class="navItem" href="/docs/latest/operations/deep-storage-migration.html">Deep storage migration</a></li><li class="navListItem"><a class="navItem" 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<h2><a class="anchor" aria-hidden="true" id="by-time-range-manually"></a><a href="#by-time-range-manually" 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>By time range, manually</h2>
<p>Apache Druid stores data <a href="/docs/latest/design/architecture.html#datasources-and-segments">partitioned by time chunk</a> and supports
deleting data for time chunks by dropping segments. This is a fast, metadata-only operation.</p>
<p>Deletion by time range happens in two steps:</p>
<ol>
<li>Segments to be deleted must first be marked as <a href="/docs/latest/design/architecture.html#segment-lifecycle">&quot;unused&quot;</a>. This can
happen when a segment is dropped by a <a href="/docs/latest/operations/rule-configuration.html">drop rule</a> or when you manually mark a
segment unused through the Coordinator API or web console. This is a soft delete: the data is not available for
querying, but the segment files remains in deep storage, and the segment records remains in the metadata store.</li>
<li>Once a segment is marked &quot;unused&quot;, you can use a <a href="#kill-task"><code>kill</code> task</a> to permanently delete the segment file from
deep storage and remove its record from the metadata store. This is a hard delete: the data is unrecoverable unless
you have a backup.</li>
</ol>
<p>For documentation on disabling segments using the Coordinator API, see the
<a href="/docs/latest/operations/api-reference.html#coordinator-datasources">Coordinator API reference</a>.</p>
<p>A data deletion tutorial is available at <a href="/docs/latest/tutorials/tutorial-delete-data.html">Tutorial: Deleting data</a>.</p>
<h2><a class="anchor" aria-hidden="true" id="by-time-range-automatically"></a><a href="#by-time-range-automatically" 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>By time range, automatically</h2>
<p>Druid supports <a href="/docs/latest/operations/rule-configuration.html">load and drop rules</a>, which are used to define intervals of time
where data should be preserved, and intervals where data should be discarded. Data that falls under a drop rule is
marked unused, in the same manner as if you <a href="#by-time-range-manually">manually mark that time range unused</a>. This is a
fast, metadata-only operation.</p>
<p>Data that is dropped in this way is marked unused, but remains in deep storage. To permanently delete it, use a
<a href="#kill-task"><code>kill</code> task</a>.</p>
<h2><a class="anchor" aria-hidden="true" id="specific-records"></a><a href="#specific-records" 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>Specific records</h2>
<p>Druid supports deleting specific records using <a href="/docs/latest/data-management/update.html#reindex">reindexing</a> with a filter. The filter specifies which
data remains after reindexing, so it must be the inverse of the data you want to delete. Because segments must be
rewritten to delete data in this way, it can be a time-consuming operation.</p>
<p>For example, to delete records where <code>userName</code> is <code>'bob'</code> with native batch indexing, use a
<a href="/docs/latest/ingestion/ingestion-spec.html#transformspec"><code>transformSpec</code></a> with filter <code>{&quot;type&quot;: &quot;not&quot;, &quot;field&quot;: {&quot;type&quot;: &quot;selector&quot;, &quot;dimension&quot;: &quot;userName&quot;, &quot;value&quot;: &quot;bob&quot;}}</code>.</p>
<p>To delete the same records using SQL, use <a href="/docs/latest/multi-stage-query/concepts.html#replace">REPLACE</a> with <code>WHERE userName &lt;&gt; 'bob'</code>.</p>
<p>To reindex using <a href="/docs/latest/ingestion/native-batch.html">native batch</a>, use the <a href="/docs/latest/ingestion/native-batch-input-sources.html#druid-input-source"><code>druid</code> input
source</a>. If needed,
<a href="/docs/latest/ingestion/ingestion-spec.html#transformspec"><code>transformSpec</code></a> can be used to filter or modify data during the
reindexing job. To reindex with SQL, use <a href="/docs/latest/multi-stage-query/reference.html#replace"><code>REPLACE &lt;table&gt; OVERWRITE</code></a>
with <code>SELECT ... FROM &lt;table&gt;</code>. (Druid does not have <code>UPDATE</code> or <code>ALTER TABLE</code> statements.) Any SQL SELECT query can be
used to filter, modify, or enrich the data during the reindexing job.</p>
<p>Data that is deleted in this way is marked unused, but remains in deep storage. To permanently delete it, use a <a href="#kill-task"><code>kill</code>
task</a>.</p>
<h2><a class="anchor" aria-hidden="true" id="entire-table"></a><a href="#entire-table" 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>Entire table</h2>
<p>Deleting an entire table works the same way as <a href="#by-time-range-manually">deleting part of a table by time range</a>. First,
mark all segments unused using the Coordinator API or web console. Then, optionally, delete it permanently using a
<a href="#kill-task"><code>kill</code> task</a>.</p>
<p><a name="kill-task"></a></p>
<h2><a class="anchor" aria-hidden="true" id="permanently-kill-task"></a><a href="#permanently-kill-task" 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>Permanently (<code>kill</code> task)</h2>
<p>Data that has been overwritten or soft-deleted still remains as segments that have been marked unused. You can use a
<code>kill</code> task to permanently delete this data.</p>
<p>The available grammar is:</p>
<pre><code class="hljs css language-json">{
    <span class="hljs-attr">"type"</span>: <span class="hljs-string">"kill"</span>,
    <span class="hljs-attr">"id"</span>: &lt;task_id&gt;,
    <span class="hljs-attr">"dataSource"</span>: &lt;task_datasource&gt;,
    <span class="hljs-attr">"interval"</span> : &lt;all_unused_segments_in_this_interval_will_die!&gt;,
    <span class="hljs-attr">"context"</span>: &lt;task context&gt;
}
</code></pre>
<p><strong>WARNING:</strong> The <code>kill</code> task permanently removes all information about the affected segments from the metadata store and
deep storage. This operation cannot be undone.</p>
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