Create a tool to MAP a function across an array.
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Key: HIVE-2317
URL: https://issues.apache.org/jira/browse/HIVE-2317
Project: Hive
Issue Type: New Feature
Reporter: Adam Kramer
Request: A function, say FUNCTION_MAP, that will map a function (udf or native)
across an array, returning the result. Desired syntax:
{code}
bar:
arr foo
[1,2,3] 3
[4,5,2] 2
[7,7,6] 1
SELECT FUNCTION_MAP(arr, 'LOG2') FROM bar
{code}
...should then return
{code}
[0, 0.301, 0.477]
[0.602, 0.699, 0.301]
[0.778, 0.778, 0.845]
{code}
...ideally, FUNCTION_MAP would take additional arguments which would be passed
to the function.
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