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From "Yin Huai (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SPARK-12454) Add ExpressionDescription to expressions are registered in FunctionRegistry
Date Mon, 21 Dec 2015 18:34:46 GMT
Yin Huai created SPARK-12454:
--------------------------------

             Summary: Add ExpressionDescription to expressions are registered in FunctionRegistry
                 Key: SPARK-12454
                 URL: https://issues.apache.org/jira/browse/SPARK-12454
             Project: Spark
          Issue Type: Improvement
          Components: SQL
            Reporter: Yin Huai


ExpressionDescription is a annotation that contains doc of a function and when users use {{describe
function}}, users can see the doc defined in this annotation. You can take a look at {{Upper}}
as an example. 

However, we still have lots of expression that do not have ExpressionDescription. It will
be great to take a look at expressions registered in FunctionRegistry and add ExpressionDescription
to those expression that do not have it.. 



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