Github user ueshin commented on a diff in the pull request:
https://github.com/apache/spark/pull/18484#discussion_r125212648
--- Diff: python/pyspark/sql/tests.py ---
@@ -2021,6 +2021,11 @@ def test_toDF_with_schema_string(self):
self.assertEqual(df.schema.simpleString(), "struct<value:int>")
self.assertEqual(df.collect(), [Row(key=i) for i in range(100)])
+ def test_join_without_on(self):
+ self.assertRaises(
+ AnalysisException,
+ lambda: self.spark.range(1).join(self.spark.range(1),
how="inner").collect())
--- End diff --
Can you add a test for `spark.sql.crossJoin.enabled` is `true` case?
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