support to variable number of arguments in UDF
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Key: PIG-1577
URL: https://issues.apache.org/jira/browse/PIG-1577
Project: Pig
Issue Type: Bug
Affects Versions: 0.6.0
Reporter: Olga Natkovich
Fix For: 0.9.0
In the current implementation, functionality that allows to map arguments to
classes does not support functions with variable number of arguments. Also it
does not support funtions that can have variable (but fixed in number) number
of arguments.
This causes problems for string UDFs such as CONCAT that can take an arbitrary
number of arguments or TRIM that can take 1,2, or 3 arguments
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