Github user HyukjinKwon commented on the pull request:
https://github.com/apache/spark/pull/13041#issuecomment-218604088
@andrewor14 Also, I am careful of this because the header might be
intendedly a empty string, meaning the field name is literally a empty string.
For example, for me the header below
```
,,1,2,3
```
might mean
```
["","","1","2","3"]
```
just like
```
a,a,1,2,3
```
will be
```
["a","a","1","2,"3,"]
```
Shouldn't this be supported with a separate option if this should be
supported? (I am a bit less sure why duplicated field names (empty string)
should be allowed, though.)
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