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[SPARK-28830][DOC][SQL]Document UNCACHE TABLE statement in SQL Reference #25540

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[SPARK-28830][DOC][SQL]Document UNCACHE TABLE statement in SQL Reference #25540

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[SPARK-28830][DOC][SQL]Document UNCACHE TABLE statement in SQL Reference
huaxingao Aug 21, 2019
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fix issues
huaxingao Aug 21, 2019
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huaxingao Aug 22, 2019
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fix a few issues
huaxingao Sep 4, 2019
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huaxingao Sep 4, 2019
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Update sql-ref-syntax-aux-cache-uncache-table.md
gatorsmile Sep 5, 2019
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24 changes: 21 additions & 3 deletions docs/sql-ref-syntax-aux-cache-uncache-table.md
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Expand Up @@ -9,14 +9,32 @@ license: |
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
---

**This page is under construction**
### Description
`UNCACHE TABLE` removes the entries and associated data from the in-memory and/or on-disk cache for the given table. The

@dilipbiswal dilipbiswal Sep 4, 2019 •
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nit : for a ?

underlying entries should already have been brought to cache by previous `CACHE TABLE` operation. `UNCACHE TABLE` on a non-existing table throws Exception if `IF EXISTS` is not specified.
### Syntax
{% highlight sql %}
UNCACHE TABLE [ IF EXISTS ] table_name
{% endhighlight %}
### Parameters
<dl>
<dt><code><em>table_name</em></code></dt>
<dd>The name of the table to be uncached.</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)