Github user davies commented on the pull request:
https://github.com/apache/spark/pull/6762#issuecomment-119671887
@chenghao-intel Thanks for working on this, it's in good shape, left some
minor comments.
This is a question about how we define the functions for DataFrame, i'd
like to have a general one and some convenient ones. For example:
```
// this is the general one, could work well for all the cases
// repeat(col("name"), lit(123)))
// repeat(lit("a"), col("number"))
def repeat(col: Column, times: Column)
// this is the convenient one
// repeat("name", 123)
def repeat(colName: String, times: Int)
```
This could be an off-topic question, we could revisit it later, before 1.5
release.
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