HIVE-1016: Ability to access distributed cache from UDFs

Review Request #748 - Created Aug. 30, 2010 and updated

Carl Steinbach
old-Hive git
trunk
HIVE-1016
hive
This patch adds UDFContext, a singleton class that provides UDFs with runtime
access to the JobConf. This patch borrows heavily from PIG-1085.


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