Parent DataFrame class for Spark Connect and Spark Classic

Author: HyukjinKwon

dev/sparktestsupport/modules.py

@@ -477,7 +477,7 @@ def __hash__(self):
         "pyspark.sql.conf",
         "pyspark.sql.catalog",
         "pyspark.sql.column",
-        "pyspark.sql.dataframe",
+        "pyspark.sql.classic.dataframe",
         "pyspark.sql.datasource",
         "pyspark.sql.group",
         "pyspark.sql.functions.builtin",

python/packaging/classic/setup.py

@@ -270,6 +270,7 @@ def run(self):
             "pyspark.ml.deepspeed",
             "pyspark.sql",
             "pyspark.sql.avro",
+            "pyspark.sql.classic",
             "pyspark.sql.connect",
             "pyspark.sql.connect.avro",
             "pyspark.sql.connect.client",

python/pyspark/ml/tests/connect/test_connect_function.py

@@ -19,7 +19,7 @@
 
 from pyspark.util import is_remote_only
 from pyspark.sql import SparkSession as PySparkSession
-from pyspark.sql.dataframe import DataFrame as SDF
+from pyspark.sql.classic.dataframe import DataFrame as SDF
 from pyspark.ml import functions as SF
 from pyspark.testing.sqlutils import SQLTestUtils
 from pyspark.testing.connectutils import (

python/pyspark/sql/classic/__init__.py

@@ -0,0 +1,18 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""Spark Classic specific"""