spark-instrumented-optimizer/docs/sql-ref-syntax-dml-insert-overwrite-directory-hive.md
Huaxin Gao b85a554487 [SPARK-28786][DOC][SQL][FOLLOW-UP] Change "Related Statements" to bold
### What changes were proposed in this pull request?
Change "Related Statements" to bold

### Why are the changes needed?
To make doc look nice and consistent.

### Does this PR introduce any user-facing change?
Yes

### How was this patch tested?
Tested using jykyll build --serve

Before the change:
![image](https://user-images.githubusercontent.com/13592258/63965303-ae797a00-ca4d-11e9-8a85-71fbfdeaaccb.png)

After the change:
![image](https://user-images.githubusercontent.com/13592258/63965316-b76a4b80-ca4d-11e9-9a85-48d7a909f0ef.png)

Before the change:
![image](https://user-images.githubusercontent.com/13592258/63988989-7c8b0680-ca93-11e9-9352-a9ec5457b279.png)

After the change:
![image](https://user-images.githubusercontent.com/13592258/63988996-87459b80-ca93-11e9-9e51-8cb36a632436.png)

Closes #25623 from huaxingao/spark-28786-n.

Authored-by: Huaxin Gao <huaxing@us.ibm.com>
Signed-off-by: Xiao Li <gatorsmile@gmail.com>
2019-08-31 14:58:41 -07:00

87 lines
3.8 KiB
Markdown

---
layout: global
title: INSERT OVERWRITE DIRECTORY with Hive format
displayTitle: INSERT OVERWRITE DIRECTORY with Hive format
license: |
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
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.
---
### Description
The `INSERT OVERWRITE DIRECTORY` with Hive format overwrites the existing data in the directory with the new values using Hive `SerDe`.
Hive support must be enabled to use this command. The inserted rows can be specified by value expressions or result from a query.
### Syntax
{% highlight sql %}
INSERT OVERWRITE [ LOCAL ] DIRECTORY directory_path
[ ROW FORMAT row_format ] [ STORED AS file_format ]
{ { VALUES ( { value | NULL } [ , ... ] ) [ , ( ... ) ] } | query }
{% endhighlight %}
### Parameters
<dl>
<dt><code><em>directory_path</em></code></dt>
<dd>
Specifies the destination directory. The <code>LOCAL</code> keyword is used to specify that the directory is on the local file system.
</dd>
</dl>
<dl>
<dt><code><em>row_format</em></code></dt>
<dd>
Specifies the row format for this insert. Valid options are <code>SERDE</code> clause and <code>DELIMITED</code> clause. <code>SERDE</code> clause can be used to specify a custom <code>SerDe</code> for this insert. Alternatively, <code>DELIMITED</code> clause can be used to specify the native <code>SerDe</code> and state the delimiter, escape character, null character, and so on.
</dd>
</dl>
<dl>
<dt><code><em>file_format</em></code></dt>
<dd>
Specifies the file format for this insert. Valid options are <code>TEXTFILE</code>, <code>SEQUENCEFILE</code>, <code>RCFILE</code>, <code>ORC</code>, <code>PARQUET</code>, and <code>AVRO</code>. You can also specify your own input and output format using <code>INPUTFORMAT</code> and <code>OUTPUTFORMAT</code>. <code>ROW FORMAT SERDE</code> can only be used with <code>TEXTFILE</code>, <code>SEQUENCEFILE</code>, or <code>RCFILE</code>, while <code>ROW FORMAT DELIMITED</code> can only be used with <code>TEXTFILE</code>.
</dd>
</dl>
<dl>
<dt><code><em>VALUES ( { value | NULL } [ , ... ] ) [ , ( ... ) ]</em></code></dt>
<dd>
Specifies the values to be inserted. Either an explicitly specified value or a NULL can be inserted. A comma must be used to seperate each value in the clause. More than one set of values can be specified to insert multiple rows.
</dd>
</dl>
<dl>
<dt><code><em>query</em></code></dt>
<dd>A query that produces the rows to be inserted. It can be in one of following formats:
<ul>
<li>a <code>SELECT</code> statement</li>
<li>a <code>TABLE</code> statement</li>
<li>a <code>FROM</code> statement</li>
</ul>
</dd>
</dl>
### Examples
{% highlight sql %}
INSERT OVERWRITE LOCAL DIRECTORY '/tmp/destination'
STORED AS orc
SELECT * FROM test_table;
INSERT OVERWRITE LOCAL DIRECTORY '/tmp/destination'
ROW FORMAT DELIMITED FIELDS TERMINATED BY ','
SELECT * FROM test_table;
{% endhighlight %}
### Related Statements
* [INSERT INTO statement](sql-ref-syntax-dml-insert-into.html)
* [INSERT OVERWRITE statement](sql-ref-syntax-dml-insert-overwrite-table.html)
* [INSERT OVERWRITE DIRECTORY statement](sql-ref-syntax-dml-insert-overwrite-directory.html)