GitHub user chenghao-intel opened a pull request:
https://github.com/apache/spark/pull/8450
[SPARK-10270][SQL][WIP]Add more java-friendly DF API
Currently in DataFrame, we have API like:
```scala
def join(right: DataFrame, usingColumns: Seq[String]): DataFrame
def dropDuplicates(colNames: Seq[String]): DataFrame
def dropDuplicates(colNames: Array[String]): DataFrame
```
Those API not like the so friendly to Java programmers, change it to:
```scala
def join(right: DataFrame, usingColumns: String*): DataFrame
def dropDuplicates(colNames: String*): DataFrame
```
However, when implemeting the
```scala
def join(right: DataFrame, usingColumns: String*): DataFrame
def dropDuplicates(colNames: String*): DataFrame
```
There are compiling error says duplicated method with `String*` and
`Seq[String]`, so we change the API like:
```scala
def join(right: DataFrame, colName: String, usingColumns: String*):
DataFrame
def dropDuplicates(colName: String, colNames: String*): DataFrame
```
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/chenghao-intel/spark df
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/8450.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #8450
----
commit fe4c0fd2c4aab0e631e3d485714ed20e6c64da2c
Author: Cheng Hao <[email protected]>
Date: 2015-08-26T04:05:37Z
add more java-friendly DF API
----
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