Extend Date UDFs to support time zone and full specs as in MySQL
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Key: HIVE-345
URL: https://issues.apache.org/jira/browse/HIVE-345
Project: Hadoop Hive
Issue Type: Improvement
Components: Query Processor
Affects Versions: 0.3.0
Reporter: Zheng Shao
Most of the Date UDF in Hive now are based on String instead of Date objects,
and they have limited functionality compared with MySQL.
http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html#function_from-unixtime
http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html#function_date-add
http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html#function_date-sub
http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html#function_datediff
We should make it fully compliant with what MySQL offers.
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