Github user yhuai commented on the pull request:
https://github.com/apache/spark/pull/1817#issuecomment-51635945
Yeah. I think it makes sense to merge it.
A quick summary. This PR has two main changes.
First, instead of generating internal column names with
```
val columnInternalNames =
neededColumnIDs.map(HiveConf.getColumnInternalName(_)).mkString(",")
```
We use
```
relation.attributes.map(_.name).mkString(",")
```
Second, we always set needed column ids instead of ill defined
`setFullyReadColumns`.
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