Merge branch 'master' into groupby-retain

Conflicts:
	sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala

Author: rxin

.gitignore

@@ -65,6 +65,7 @@ scalastyle.txt
 scalastyle-output.xml
 R-unit-tests.log
 R/unit-tests.out
+python/lib/pyspark.zip
 
 # For Hive
 metastore_db/

.rat-excludes

@@ -36,7 +36,6 @@ graphlib-dot.min.js
 sorttable.js
 vis.min.js
 vis.min.css
-vis.map
 .*avsc
 .*txt
 .*json
@@ -74,5 +73,12 @@ logs
 .*scalastyle-output.xml
 .*dependency-reduced-pom.xml
 known_translations
+json_expectation
+local-1422981759269/*
+local-1422981780767/*
+local-1425081759269/*
+local-1426533911241/*
+local-1426633911242/*
+local-1430917381534/*
 DESCRIPTION
 NAMESPACE

R/pkg/DESCRIPTION

@@ -15,11 +15,11 @@ Suggests:
 Description: R frontend for Spark
 License: Apache License (== 2.0)
 Collate:
+    'schema.R'
     'generics.R'
     'jobj.R'
     'RDD.R'
     'pairRDD.R'
-    'schema.R'
     'column.R'
     'group.R'
     'DataFrame.R'

R/pkg/NAMESPACE

@@ -9,7 +9,8 @@ export("print.jobj")
 
 exportClasses("DataFrame")
 
-exportMethods("cache",
+exportMethods("arrange",
+              "cache",
               "collect",
               "columns",
               "count",
@@ -20,21 +21,24 @@ exportMethods("cache",
               "explain",
               "filter",
               "first",
+              "group_by",
               "groupBy",
               "head",
               "insertInto",
               "intersect",
               "isLocal",
               "join",
-              "length",
               "limit",
               "orderBy",
+              "mutate",
               "names",
               "persist",
               "printSchema",
               "registerTempTable",
+              "rename",
               "repartition",
               "sampleDF",
+              "sample_frac",
               "saveAsParquetFile",
               "saveAsTable",
               "saveDF",
@@ -43,7 +47,7 @@ exportMethods("cache",
               "selectExpr",
               "show",
               "showDF",
-              "sortDF",
+              "summarize",
               "take",
               "unionAll",
               "unpersist",
@@ -73,6 +77,8 @@ exportMethods("abs",
               "max",
               "mean",
               "min",
+              "n",
+              "n_distinct",
               "rlike",
               "sqrt",
               "startsWith",
@@ -101,9 +107,6 @@ export("cacheTable",
        "tables",
        "uncacheTable")
 
-export("sparkRSQL.init",
-       "sparkRHive.init")
-
 export("structField",
        "structField.jobj",
        "structField.character",