Github user marmbrus commented on the pull request:
https://github.com/apache/spark/pull/679#issuecomment-42486106
That would cause issues when this type of expression is created before
resolution has occurred. Specifically you are not allowed to call dataType
on unresolved expressions.
That said, this could be a val if you added the right checks.
On May 7, 2014 2:31 PM, "Aaron Davidson" <[email protected]> wrote:
> Out of curiosity, why can't this just be a normal val, rather than lazy?
>
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