diff --git a/docs/sql-ref-syntax-aux-describe-function.md b/docs/sql-ref-syntax-aux-describe-function.md
index 1c50708556765..d3dc1920642f6 100644
--- a/docs/sql-ref-syntax-aux-describe-function.md
+++ b/docs/sql-ref-syntax-aux-describe-function.md
@@ -34,7 +34,7 @@ metadata information is returned along with the extended usage information.
 <dl>
   <dt><code><em>function_name</em></code></dt>
   <dd>
-    Specifies a name of an existing function in the syetem. The function name may be
+    Specifies a name of an existing function in the system. The function name may be
     optionally qualified with a database name. If `function_name` is qualified with
     a database then the function is resolved from the user specified database, otherwise
     it is resolved from the current database.<br><br>
diff --git a/docs/sql-ref-syntax-aux-show-functions.md b/docs/sql-ref-syntax-aux-show-functions.md
index ae689fdf227e9..db026071e6a59 100644
--- a/docs/sql-ref-syntax-aux-show-functions.md
+++ b/docs/sql-ref-syntax-aux-show-functions.md
@@ -19,4 +19,121 @@ license: |
   limitations under the License.
 ---
 
-**This page is under construction**
+### Description
+Returns the list of functions after applying an optional regex pattern.
+Given number of functions supported by Spark is quite large, this statement
+in conjuction with [describe function](sql-ref-syntax-aux-describe-function.html)
+may be used to quickly find the function and understand its usage. The `LIKE` 
+clause is optional and supported only for compatibility with other systems.
+
+### Syntax
+{% highlight sql %}
+SHOW [ function_kind ] FUNCTIONS ([LIKE] function_name | regex_pattern)
+{% endhighlight %}
+
+### Parameters
+<dl>
+  <dt><code><em>function_kind</em></code></dt>
+  <dd>
+    Specifies the name space of the function to be searched upon. The valid name spaces are :
+    <ul>
+      <li><b>USER</b> - Looks up the function(s) among the user defined functions.</li>
+      <li><b>SYSTEM</b> - Looks up the function(s) among the system defined functions.</li>
+      <li><b>ALL</b> -  Looks up the function(s) among both user and system defined functions.</li>
+    </ul>
+  </dd>
+  <dt><code><em>function_name</em></code></dt>
+  <dd>
+    Specifies a name of an existing function in the system. The function name may be
+    optionally qualified with a database name. If `function_name` is qualified with
+    a database then the function is resolved from the user specified database, otherwise
+    it is resolved from the current database.<br><br>
+    <b>Syntax:</b>
+      <code>
+        [database_name.]function_name
+      </code>
+  </dd>
+  <dt><code><em>regex_pattern</em></code></dt>
+  <dd>
+    Specifies a regular expression pattern that is used to limit the results of the
+    statement.
+    <ul>
+      <li>Only `*` and `|` are allowed as wildcard pattern.</li>
+      <li>Excluding `*` and `|` the remaining pattern follows the regex semantics.</li>
+      <li>The leading and trailing blanks are trimmed in the input pattern before processing.</li> 
+    </ul>
+  </dd>
+</dl>
+
+### Examples
+{% highlight sql %}
+-- List a system function `trim` by searching both user defined and system
+-- defined functions.
+SHOW FUNCTIONS trim;
+  +--------+
+  |function|
+  +--------+
+  |trim    |
+  +--------+
+
+-- List a system function `concat` by searching system defined functions.
+SHOW SYSTEM FUNCTIONS concat;
+  +--------+
+  |function|
+  +--------+
+  |concat  |
+  +--------+
+
+-- List a qualified function `max` from database `salesdb`. 
+SHOW SYSTEM FUNCTIONS salesdb.max;
+  +--------+
+  |function|
+  +--------+
+  |max     |
+  +--------+
+
+-- List all functions starting with `t`
+SHOW FUNCTIONS LIKE 't*';
+  +-----------------+
+  |function         |
+  +-----------------+
+  |tan              |
+  |tanh             |
+  |timestamp        |
+  |tinyint          |
+  |to_csv           |
+  |to_date          |
+  |to_json          |
+  |to_timestamp     |
+  |to_unix_timestamp|
+  |to_utc_timestamp |
+  |transform        |
+  |transform_keys   |
+  |transform_values |
+  |translate        |
+  |trim             |
+  |trunc            |
+  +-----------------+
+
+-- List all functions starting with `yea` or `windo`
+SHOW FUNCTIONS LIKE 'yea*|windo*';
+  +--------+
+  |function|
+  +--------+
+  |window  |
+  |year    |
+  +--------+
+
+-- Use normal regex pattern to list function names that has 4 characters
+-- with `t` as the starting character.
+SHOW FUNCTIONS LIKE 't[a-z][a-z][a-z]';
+  +--------+
+  |function|
+  +--------+
+  |tanh    |
+  |trim    |
+  +--------+
+{% endhighlight %}
+
+### Related statements
+- [DESCRIBE FUNCTION](sql-ref-syntax-aux-describe-function.html)