01cc852982
### What changes were proposed in this pull request? Change the link to the Scala API document. ``` $ git grep "#org.apache.spark.package" docs/_layouts/global.html: <li><a href="api/scala/index.html#org.apache.spark.package">Scala</a></li> docs/index.md:* [Spark Scala API (Scaladoc)](api/scala/index.html#org.apache.spark.package) docs/rdd-programming-guide.md:[Scala](api/scala/#org.apache.spark.package), [Java](api/java/), [Python](api/python/) and [R](api/R/). ``` ### Why are the changes needed? The home page link for Scala API document is incorrect after upgrade to 3.0 ### Does this PR introduce any user-facing change? Document UI change only. ### How was this patch tested? Local test, attach screenshots below: Before: ![image](https://user-images.githubusercontent.com/4833765/74335713-c2385300-4dd7-11ea-95d8-f5a3639d2578.png) After: ![image](https://user-images.githubusercontent.com/4833765/74335727-cbc1bb00-4dd7-11ea-89d9-4dcc1310e679.png) Closes #27549 from xuanyuanking/scala-doc. Authored-by: Yuanjian Li <xyliyuanjian@gmail.com> Signed-off-by: Sean Owen <srowen@gmail.com>
59 lines
2.1 KiB
Markdown
59 lines
2.1 KiB
Markdown
---
|
|
layout: global
|
|
title: REFRESH TABLE
|
|
displayTitle: REFRESH TABLE
|
|
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
|
|
`REFRESH TABLE` statement invalidates the cached entries, which include data
|
|
and metadata of the given table or view. The invalidated cache is populated in
|
|
lazy manner when the cached table or the query associated with it is executed again.
|
|
|
|
### Syntax
|
|
{% highlight sql %}
|
|
REFRESH [TABLE] table_identifier
|
|
{% endhighlight %}
|
|
|
|
### Parameters
|
|
<dl>
|
|
<dt><code><em>table_identifier</em></code></dt>
|
|
<dd>
|
|
Specifies a table name, which is either a qualified or unqualified name that designates a table/view. If no database identifier is provided, it refers to a temporary view or a table/view in the current database.<br><br>
|
|
<b>Syntax:</b>
|
|
<code>
|
|
[ database_name. ] table_name
|
|
</code>
|
|
</dd>
|
|
</dl>
|
|
|
|
### Examples
|
|
{% highlight sql %}
|
|
-- The cached entries of the table will be refreshed
|
|
-- The table is resolved from the current database as the table name is unqualified.
|
|
REFRESH TABLE tbl1;
|
|
|
|
-- The cached entries of the view will be refreshed or invalidated
|
|
-- The view is resolved from tempDB database, as the view name is qualified.
|
|
REFRESH TABLE tempDB.view1;
|
|
{% endhighlight %}
|
|
|
|
### Related Statements
|
|
- [CACHE TABLE](sql-ref-syntax-aux-cache-cache-table.html)
|
|
- [CLEAR CACHE](sql-ref-syntax-aux-cache-clear-cache.html)
|
|
- [UNCACHE TABLE](sql-ref-syntax-aux-cache-uncache-table.html)
|