Github user cloud-fan commented on the pull request:
https://github.com/apache/spark/pull/4892#issuecomment-77366771
Hi @chenghao-intel , have you considered about something like `a.b[0].c`?
It will be parsed into `UnresolvedGetField(GetItem(UnresolvedAttribute("a.b"),
0), "c")`, so you can't resolve the GetField chain in one time at
`LogicalPlan#resolve`
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