[SPARK-6366][SQL] In Python API, the default save mode for save and saveAsTable should be "error" instead of "append".

https://issues.apache.org/jira/browse/SPARK-6366

Author: Yin Huai <yhuai@databricks.com>

Closes #5053 from yhuai/SPARK-6366 and squashes the following commits:

fc81897 [Yin Huai] Use error as the default save mode for save/saveAsTable.

1 files changed, 2 insertions, 2 deletions

diff --git a/python/pyspark/sql/dataframe.py b/python/pyspark/sql/dataframe.py
index 94001aec37..5cb89da7a8 100644
--- a/python/pyspark/sql/dataframe.py
+++ b/python/pyspark/sql/dataframe.py
@@ -162,7 +162,7 @@ class DataFrame(object):
                 "Only 'append', 'overwrite', 'ignore', and 'error' are acceptable save mode.")
         return jmode
 
-    def saveAsTable(self, tableName, source=None, mode="append", **options):
+    def saveAsTable(self, tableName, source=None, mode="error", **options):
         """Saves the contents of the :class:`DataFrame` to a data source as a table.
 
         The data source is specified by the `source` and a set of `options`.
@@ -188,7 +188,7 @@ class DataFrame(object):
                                           self.sql_ctx._sc._gateway._gateway_client)
         self._jdf.saveAsTable(tableName, source, jmode, joptions)
 
-    def save(self, path=None, source=None, mode="append", **options):
+    def save(self, path=None, source=None, mode="error", **options):
         """Saves the contents of the :class:`DataFrame` to a data source.
 
         The data source is specified by the `source` and a set of `options`.