Review Request: HIVE-3217: Implement HiveDatabaseMetaData.getFunctions() to retrieve registered UDFs

[Richard Ding <rd...@yahoo-inc.com>]

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https://reviews.apache.org/r/7023/
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Review request for hive and Ashutosh Chauhan.


Description
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Hive JDBC support currently throws UnsupportedException when getFunctions() is called. Hive CL provides a SHOW FUNCTIONS command to return the names of all registered UDFs. By getting a SQL Statement from the connection, getFunctions can execute( "SHOW FUNCTIONS") to retrieve all the registered functions (including those registered through create temporary function).


This addresses bug HIVE-3217.
    https://issues.apache.org/jira/browse/HIVE-3217


Diffs
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  http://svn.apache.org/repos/asf/hive/trunk/jdbc/src/java/org/apache/hadoop/hive/jdbc/HiveConnection.java 1355487 
  http://svn.apache.org/repos/asf/hive/trunk/jdbc/src/java/org/apache/hadoop/hive/jdbc/HiveDatabaseMetaData.java 1355487 
  http://svn.apache.org/repos/asf/hive/trunk/jdbc/src/test/org/apache/hadoop/hive/jdbc/TestJdbcDriver.java 1355487 

Diff: https://reviews.apache.org/r/7023/diff/


Testing
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ant test -Dtestcase=TestJdbcDriver passed


Thanks,

Richard Ding