spark-instrumented-optimizer/docs/sql-ref-syntax-aux-cache-uncache-table.md

---
layout: global
title: UNCACHE TABLE
displayTitle: UNCACHE TABLE
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  this work for additional information regarding copyright ownership.
  The ASF licenses this file to You under the Apache License, Version 2.0
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---

### Description
`UNCACHE TABLE` removes the entries and associated data from the in-memory and/or on-disk cache for a given table or view. The
underlying entries should already have been brought to cache by previous `CACHE TABLE` operation. `UNCACHE TABLE` on a non-existent table throws an exception if `IF EXISTS` is not specified.

### Syntax
{% highlight sql %}
UNCACHE TABLE [ IF EXISTS ] table_identifier
{% endhighlight %}

### Parameters
<dl>
  <dt><code><em>table_identifier</em></code></dt>
  <dd>
    Specifies the table or view name to be uncached. The table or view name may be optionally qualified with a database name.<br><br>
    <b>Syntax:</b>
      <code>
        [ database_name. ] table_name
      </code>
  </dd>
</dl>

### Examples
{% highlight sql %}
UNCACHE TABLE t1;
{% endhighlight %}

### Related Statements
 * [CACHE TABLE](sql-ref-syntax-aux-cache-cache-table.html)
 * [CLEAR CACHE](sql-ref-syntax-aux-cache-clear-cache.html)
 * [REFRESH TABLE](sql-ref-syntax-aux-refresh-table.html)