Update documentation for [SPARK-7980] [SQL] Support SQLContext.range(end)

python/pyspark/sql/context.py

@@ -146,6 +146,8 @@ class SQLContext(object):
         >>> sqlContext.range(1, 7, 2).collect()
         [Row(id=1), Row(id=3), Row(id=5)]
 
+        If only one argument is specified, it will be used as the end value.
+
         >>> sqlContext.range(3).collect()
         [Row(id=0), Row(id=1), Row(id=2)]
         """

sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala

@@ -705,33 +705,33 @@ class SQLContext(@transient val sparkContext: SparkContext)
   /**
    * :: Experimental ::
    * Creates a [[DataFrame]] with a single [[LongType]] column named `id`, containing elements
-   * in an range from `start` to `end`(exclusive) with step value 1.
+   * in an range from 0 to `end` (exclusive) with step value 1.
    *
-   * @since 1.4.0
+   * @since 1.4.1
    * @group dataframe
    */
   @Experimental
-  def range(start: Long, end: Long): DataFrame = {
-    createDataFrame(
-      sparkContext.range(start, end).map(Row(_)),
-      StructType(StructField("id", LongType, nullable = false) :: Nil))
-  }
+  def range(end: Long): DataFrame = range(0, end)
 
   /**
    * :: Experimental ::
    * Creates a [[DataFrame]] with a single [[LongType]] column named `id`, containing elements
-   * in an range from 0 to `end`(exclusive) with step value 1.
+   * in an range from `start` to `end` (exclusive) with step value 1.
    *
    * @since 1.4.0
    * @group dataframe
    */
   @Experimental
-  def range(end: Long): DataFrame = range(0, end)
+  def range(start: Long, end: Long): DataFrame = {
+    createDataFrame(
+      sparkContext.range(start, end).map(Row(_)),
+      StructType(StructField("id", LongType, nullable = false) :: Nil))
+  }
 
   /**
    * :: Experimental ::
    * Creates a [[DataFrame]] with a single [[LongType]] column named `id`, containing elements
-   * in an range from `start` to `end`(exclusive) with an step value, with partition number
+   * in an range from `start` to `end` (exclusive) with an step value, with partition number
    * specified.
    *
    * @since 1.4.0