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From "Victoria Markman (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-1937) Disable internal function SINGLE_VALUE()
Date Tue, 06 Jan 2015 19:06:34 GMT
Victoria Markman created DRILL-1937:
---------------------------------------

             Summary: Disable internal function SINGLE_VALUE() 
                 Key: DRILL-1937
                 URL: https://issues.apache.org/jira/browse/DRILL-1937
             Project: Apache Drill
          Issue Type: Bug
          Components: SQL Parser
    Affects Versions: 0.8.0
            Reporter: Victoria Markman
            Assignee: Aman Sinha


{code}
#Fri Jan 02 21:20:47 EST 2015
git.commit.id.abbrev=b491cdb
{code}

It is dangerous to have an internal function be exposed to users.
What if one day user decided to write a UDF with the same signature ?

{code}
0: jdbc:drill:schema=dfs> select SINGLE_VALUE(1) from `t.json`;
+--+
|  |
+--+
+--+
No rows selected (0.111 seconds)
{code}



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