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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2023/02/16 01:05:00 UTC
[jira] [Assigned] (SPARK-41817) SparkSession.read support reading with schema
[ https://issues.apache.org/jira/browse/SPARK-41817?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-41817:
------------------------------------
Assignee: Apache Spark
> SparkSession.read support reading with schema
> ---------------------------------------------
>
> Key: SPARK-41817
> URL: https://issues.apache.org/jira/browse/SPARK-41817
> Project: Spark
> Issue Type: Sub-task
> Components: Connect
> Affects Versions: 3.4.0
> Reporter: Sandeep Singh
> Assignee: Apache Spark
> Priority: Major
>
> {code:java}
> File "/Users/s.singh/personal/spark-oss/python/pyspark/sql/connect/readwriter.py", line 122, in pyspark.sql.connect.readwriter.DataFrameReader.load
> Failed example:
> with tempfile.TemporaryDirectory() as d:
> # Write a DataFrame into a CSV file with a header
> df = spark.createDataFrame([{"age": 100, "name": "Hyukjin Kwon"}])
> df.write.option("header", True).mode("overwrite").format("csv").save(d)
> # Read the CSV file as a DataFrame with 'nullValue' option set to 'Hyukjin Kwon',
> # and 'header' option set to `True`.
> df = spark.read.load(
> d, schema=df.schema, format="csv", nullValue="Hyukjin Kwon", header=True)
> df.printSchema()
> df.show()
> Exception raised:
> Traceback (most recent call last):
> File "/usr/local/Cellar/python@3.10/3.10.8/Frameworks/Python.framework/Versions/3.10/lib/python3.10/doctest.py", line 1350, in __run
> exec(compile(example.source, filename, "single",
> File "<doctest pyspark.sql.connect.readwriter.DataFrameReader.load[1]>", line 10, in <module>
> df.printSchema()
> File "/Users/s.singh/personal/spark-oss/python/pyspark/sql/connect/dataframe.py", line 1039, in printSchema
> print(self._tree_string())
> File "/Users/s.singh/personal/spark-oss/python/pyspark/sql/connect/dataframe.py", line 1035, in _tree_string
> query = self._plan.to_proto(self._session.client)
> File "/Users/s.singh/personal/spark-oss/python/pyspark/sql/connect/plan.py", line 92, in to_proto
> plan.root.CopyFrom(self.plan(session))
> File "/Users/s.singh/personal/spark-oss/python/pyspark/sql/connect/plan.py", line 245, in plan
> plan.read.data_source.schema = self.schema
> TypeError: bad argument type for built-in operation {code}
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