[jira] [Created] (SPARK-42666) Fix `tail` to work properly

["Haejoon Lee (Jira)" <ji...@apache.org>]

Haejoon Lee created SPARK-42666:
-----------------------------------

             Summary: Fix `tail` to work properly
                 Key: SPARK-42666
                 URL: https://issues.apache.org/jira/browse/SPARK-42666
             Project: Spark
          Issue Type: Sub-task
          Components: Connect
    Affects Versions: 3.5.0
            Reporter: Haejoon Lee


The code below is not working properly in Spark Connect:
{code:java}
>>> sdf = spark.range(10)
>>> spark.createDataFrame(sdf.tail(5), sdf.schema) 
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/.../spark/python/pyspark/sql/connect/dataframe.py", line 94, in __repr__
    return "DataFrame[%s]" % (", ".join("%s: %s" % c for c in self.dtypes))
  File "/.../spark/python/pyspark/sql/connect/dataframe.py", line 162, in dtypes
    return [(str(f.name), f.dataType.simpleString()) for f in self.schema.fields]
  File "/.../spark/python/pyspark/sql/connect/dataframe.py", line 1346, in schema
    self._schema = self._session.client.schema(query)
  File "/.../spark/python/pyspark/sql/connect/client.py", line 614, in schema
    proto_schema = self._analyze(method="schema", plan=plan).schema
  File "/.../spark/python/pyspark/sql/connect/client.py", line 755, in _analyze
    self._handle_error(rpc_error)
  File "/.../spark/python/pyspark/sql/connect/client.py", line 894, in _handle_error
    raise convert_exception(info, status.message) from None
pyspark.errors.exceptions.connect.AnalysisException: [NULLABLE_COLUMN_OR_FIELD] Column or field `id` is nullable while it's required to be non-nullable.{code}
whereas working properly in regular PySpark:
{code:java}
>>> sdf = spark.range(10)
>>> spark.createDataFrame(sdf.tail(5), sdf.schema).show()
+---+
| id|
+---+
|  5|
|  6|
|  7|
|  8|
|  9|
+---+ {code}



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