[SPARK-14896][SQL] Deprecate HiveContext in python

## What changes were proposed in this pull request?

See title.

## How was this patch tested?

PySpark tests.

Author: Andrew Or <[email protected]>

Closes apache#12917 from andrewor14/deprecate-hive-context-python.

Author: Andrew Or

python/pyspark/sql/column.py

@@ -418,8 +418,6 @@ def over(self, window):
         >>> window = Window.partitionBy("name").orderBy("age").rowsBetween(-1, 1)
         >>> from pyspark.sql.functions import rank, min
         >>> # df.select(rank().over(window), min('age').over(window))
-
-        .. note:: Window functions is only supported with HiveContext in 1.4
         """
         from pyspark.sql.window import WindowSpec
         if not isinstance(window, WindowSpec):

python/pyspark/sql/context.py

@@ -17,6 +17,7 @@
 
 from __future__ import print_function
 import sys
+import warnings
 
 if sys.version >= '3':
     basestring = unicode = str
@@ -434,7 +435,6 @@ def streams(self):
         return ContinuousQueryManager(self._ssql_ctx.streams())
 
 
-# TODO(andrew): deprecate this
 class HiveContext(SQLContext):
     """A variant of Spark SQL that integrates with data stored in Hive.
 
@@ -444,8 +444,15 @@ class HiveContext(SQLContext):
     :param sparkContext: The SparkContext to wrap.
     :param jhiveContext: An optional JVM Scala HiveContext. If set, we do not instantiate a new
         :class:`HiveContext` in the JVM, instead we make all calls to this object.
+
+    .. note:: Deprecated in 2.0.0. Use SparkSession.builder.enableHiveSupport().getOrCreate().
     """
 
+    warnings.warn(
+        "HiveContext is deprecated in Spark 2.0.0. Please use " +
+        "SparkSession.builder.enableHiveSupport().getOrCreate() instead.",
+        DeprecationWarning)
+
     def __init__(self, sparkContext, jhiveContext=None):
         if jhiveContext is None:
             sparkSession = SparkSession.withHiveSupport(sparkContext)

python/pyspark/sql/streaming.py

@@ -221,7 +221,7 @@ def _test():
     globs['os'] = os
     globs['sc'] = sc
     globs['sqlContext'] = SQLContext(sc)
-    globs['hiveContext'] = HiveContext(sc)
+    globs['hiveContext'] = HiveContext._createForTesting(sc)
     globs['df'] = \
         globs['sqlContext'].read.format('text').stream('python/test_support/sql/streaming')