dilipbiswal commented on a change in pull request #25894:
[SPARK-28793][DOC][SQL] Document CREATE FUNCTION in SQL Reference
URL: https://github.com/apache/spark/pull/25894#discussion_r326950963
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File path: docs/sql-ref-syntax-ddl-create-function.md
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@@ -19,4 +19,148 @@ license: |
limitations under the License.
---
-**This page is under construction**
+### Description
+`CREATE FUNCTION` statement is used to create a temporary or permanent function
+in Spark. Temporary functions are scoped at a session level where as permanent
+functions are created in the persistent catalog and are made available to
+all sessions. The resources specified in the `USING` clause are made available
+to all executors when they are executed for the first time.
+
+### Syntax
+{% highlight sql %}
+CREATE [ OR REPLACE ] [ TEMPORARY ] FUNCTION [ IF NOT EXISTS ]
+ function_name AS class_name [ resource_locations ]
+{% endhighlight %}
+
+### Parameters
+<dl>
+ <dt><code><em>OR REPLACE</em></code></dt>
+ <dd>
+ If specified, the resources for function are reloaded. This is mainly
useful
+ to pick up any changes made to the implementation of the function. This
+ parameter is mutually exclusive to <code>IF NOT EXISTS</code> and can not
+ be specified together.
+ </dd>
+ <dt><code><em>TEMPORARY</em></code></dt>
+ <dd>
+ Indicates the scope of function being created. When TEMPORARY is
specified, the
+ created function is valid in the current session. No persistent entry is
made
Review comment:
@gatorsmile thanks.. fixed.
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