Github user yhuai commented on a diff in the pull request:
https://github.com/apache/spark/pull/4446#discussion_r24462846
--- Diff: python/pyspark/sql/dataframe.py ---
@@ -146,9 +146,74 @@ def insertInto(self, tableName, overwrite=False):
"""
self._jdf.insertInto(tableName, overwrite)
- def saveAsTable(self, tableName):
- """Creates a new table with the contents of this DataFrame."""
- self._jdf.saveAsTable(tableName)
+ def _java_save_mode(self, mode):
+ """Returns the Java save mode based on the Python save mode
represented by a string.
+ """
+ jmode =
self._sc._jvm.org.apache.spark.sql.sources.SaveMode.ErrorIfExists
+ mode = mode.lower()
+ if mode == "append":
+ jmode =
self._sc._jvm.org.apache.spark.sql.sources.SaveMode.Append
+ elif mode == "overwrite":
+ jmode =
self._sc._jvm.org.apache.spark.sql.sources.SaveMode.Overwrite
+ elif mode == "ignore":
+ jmode =
self._sc._jvm.org.apache.spark.sql.sources.SaveMode.Ignore
+ elif mode == "error":
+ pass
+ else:
+ raise ValueError(
+ "Only 'append', 'overwrite', 'ignore', and 'error' are
acceptable save mode.")
+ return jmode
+
+ def saveAsTable(self, tableName, source=None, mode="append",
**options):
--- End diff --
I am not sure if we can do it. `tableName` has been used at lots of places.
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