notfilippo commented on PR #11978:
URL: https://github.com/apache/datafusion/pull/11978#issuecomment-2293500975
> Given that we have ScalarValue::Utf8, and we have StringView in schema. We
can then get the corresponding StrginViewArray.
I feel like this is a little bit more complex because casting a scalar value
to a logically equal type (`arrow_cast('test', 'Dictionary(Int32, Utf8)')`) is
a no-op for all cases but one the cast is at the top level, which indicates
that you actually want an __array__ of that type. So we need a way to
distinguish those two scenarios, which is why I've added this:
https://github.com/apache/datafusion/blob/78dc034d4b7d644e6c34745286e82a6332dd7606/datafusion/physical-plan/src/projection.rs#L312
But I'm not really sure about it...
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