Github user chenghao-intel commented on the pull request:
https://github.com/apache/spark/pull/3780#issuecomment-70767766
Or probably we can cleanup those APIs, kind of like:
```
trait Mode
object Append extends Mode
object Create extends Mode
object CreateOrOverwrite extends Mode
object CreateOrAppend extends Mode
def outputFile(path: String, format: FileFormat=defaultFormat, mode: Mode =
CreateOrOverwrite)
def insertIntoFile(path: String, format: FileFormat) = outputFile(path,
format, CreateOrOverwrite)
def toCsv(path: String, mode: Mode) = outputFile(path, CSV, mode)
def toParquet(path: String, mode: Mode) = outputFile(path, Parquet, mode)
```
Any ideas?
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