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:  After:  Closes #27549 from xuanyuanking/scala-doc. Authored-by: Yuanjian Li <xyliyuanjian@gmail.com> Signed-off-by: Sean Owen <srowen@gmail.com>
55 lines
1.8 KiB
Markdown
55 lines
1.8 KiB
Markdown
---
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layout: global
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title: REFRESH
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displayTitle: REFRESH
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license: |
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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---
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### Description
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`REFRESH` is used to invalidate and refresh all the cached data (and the associated metadata) for
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all Datasets that contains the given data source path. Path matching is by prefix, i.e. "/" would
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invalidate everything that is cached.
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### Syntax
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{% highlight sql %}
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REFRESH resource_path
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{% endhighlight %}
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### Parameters
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<dl>
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<dt><code><em>resource_path</em></code></dt>
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<dd>The path of the resource that is to be refreshed.</dd>
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</dl>
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### Examples
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{% highlight sql %}
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-- The Path is resolved using the datasource's File Index.
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CREATE TABLE test(ID INT) using parquet;
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INSERT INTO test SELECT 1000;
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CACHE TABLE test;
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INSERT INTO test SELECT 100;
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REFRESH "hdfs://path/to/table";
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{% endhighlight %}
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### Related Statements
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- [CACHE TABLE](sql-ref-syntax-aux-cache-cache-table.html)
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- [CLEAR CACHE](sql-ref-syntax-aux-cache-clear-cache.html)
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- [UNCACHE TABLE](sql-ref-syntax-aux-cache-uncache-table.html)
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- [REFRESH TABLE](sql-ref-syntax-aux-refresh-table.html)
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