Github user merrimanr commented on the issue:
https://github.com/apache/metron/pull/884
I also noticed that functions returning a list only display the first item
in both the shell and Zeppelin output.
For example, the expression `MAP([ 'foo', 'bar'], (x) -> TO_UPPER(x) )`
returns `FOO` when I would expect it to return `['FOO', 'BAR']`.
From what I can tell the problem is only in how the result is displayed.
For example, the expression `'BAR' in MAP([ 'foo', 'bar'], (x) -> TO_UPPER(x)
)` returns `true` as expected.
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