Github user gatorsmile commented on a diff in the pull request:

    https://github.com/apache/spark/pull/14897#discussion_r81463019
  
    --- Diff: docs/sql-programming-guide.md ---
    @@ -220,6 +220,40 @@ The `sql` function enables applications to run SQL 
queries programmatically and
     </div>
     
     
    +## Global Temporary View
    +
    +Temporay views in Spark SQL are session-scoped and will disappear if the 
session that creates it
    +terminates. If you want to have a temporary view that is shared among all 
sessions and keep alive
    +until the Spark application terminiates, you can create a global temporary 
view. Global temporary
    +view is tied to a system preserved database `global_temp`, and we must use 
the qualified name to
    +refer it, e.g. `SELECT * FROM global_temp.view1`.
    +
    +<div class="codetabs">
    +<div data-lang="scala"  markdown="1">
    +{% include_example global_temp_view 
scala/org/apache/spark/examples/sql/SparkSQLExample.scala %}
    +</div>
    +
    +<div data-lang="java" markdown="1">
    +{% include_example global_temp_view 
java/org/apache/spark/examples/sql/JavaSparkSQLExample.java %}
    +</div>
    +
    +<div data-lang="python"  markdown="1">
    +{% include_example global_temp_view python/sql/basic.py %}
    +</div>
    +
    +<div data-lang="sql"  markdown="1">
    +
    +{% highlight sql %}
    +
    +CREATE GLOBAL TEMPORARY VIEW temp_view AS SELECT a + 1, b * 2 FROM tbl
    +
    +SELECT * FROM global_temp.temp_view
    +
    +{% endhighlight %}
    +
    +</div>
    --- End diff --
    
    We need one more </div>


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