shivusondur commented on a change in pull request #25561:
[SPARK-28810][DOC][SQL] Document SHOW TABLES in SQL Reference.
URL: https://github.com/apache/spark/pull/25561#discussion_r326856785
##########
File path: docs/sql-ref-syntax-aux-show-tables.md
##########
@@ -18,5 +18,73 @@ license: |
See the License for the specific language governing permissions and
limitations under the License.
---
+### Description
-**This page is under construction**
+List all the `tables` from the database with `database-name` and `is temporary
table`.
+
+### Syntax
+{% highlight sql %}
+SHOW TABLES [{FROM|IN} database_name] [LIKE 'regex_pattern']
+{% endhighlight %}
+
+### Parameter
+<dl>
+ <dt><code><em>{FROM|IN} database_name</em></code></dt>
+ <dd>
+ Listing the tables from this `database`.
+ </dd>
+ <dt><code><em>LIKE 'regex_pattern'</em></code></dt>
+ <dd>
+ A regex pattern that is used to filter out unwanted functions.
+ <br> - Only `*` and `|` are allowed as wildcard pattern.
+ <br> - Excluding `*` and `|` the remaining pattern follows the regex
semantics.
+ <br> - The leading and trailing blanks are trimmed in the input pattern
before processing.
+ </dd>
+</dl>
+
+### Example
+{% highlight sql %}
+-- List all tables in default database
+SHOW TABLES;
++-----------+------------+--------------+--+
+| database | tableName | isTemporary |
++-----------+------------+--------------+--+
+| default | sam | false |
+| default | sam1 | false |
+| default | suj | false |
++-----------+------------+--------------+--+
+
+-- List all tables from userdb database
+SHOW TABLES FROM userdb;
++-----------+------------+--------------+--+
+| database | tableName | isTemporary |
++-----------+------------+--------------+--+
+| userdb | user1 | false |
+| userdb | user2 | false |
++-----------+------------+--------------+--+
+
+-- List all tables in userdb database
+SHOW TABLES IN userdb;
++-----------+------------+--------------+--+
+| database | tableName | isTemporary |
++-----------+------------+--------------+--+
+| userdb | user1 | false |
+| userdb | user2 | false |
++-----------+------------+--------------+--+
+
+-- List all tables from default database matching the pattern `sam*`
+SHOW TABLES FROM default LIKE 'sam*';
++-----------+------------+--------------+--+
+| database | tableName | isTemporary |
++-----------+------------+--------------+--+
+| default | sam | false |
+| default | sam1 | false |
++-----------+------------+--------------+--+
+
+{% endhighlight %}
+
+### Related statements.
Review comment:
Done
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