Github user petermaxlee commented on the issue:
https://github.com/apache/spark/pull/13969
@hvanhovell in its current form we'd need some refactoring to StaticInvoke
to work with this, due to Hive allowing both static invocation and dynamic
invocation.
Also - does StaticInvoke do type conversion? If not, it seems like extra
work is needed in order to work with RuntimeReplaceable, due to a limitation
that it does not really support proper type checking for expressions.
As for String, I remember @rxin making a comment somewhere that string type
is sufficient for now.
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