[jira] [Updated] (SPARK-34805) PySpark loses metadata in DataFrame fields when selecting nested columns
[
https://issues.apache.org/jira/browse/SPARK-34805?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Kevin Wallimann updated SPARK-34805:
Attachment: nested_columns_metadata.scala
> PySpark loses metadata in DataFrame fields when selecting nested columns
>
>
> Key: SPARK-34805
> URL: https://issues.apache.org/jira/browse/SPARK-34805
> Project: Spark
> Issue Type: Bug
> Components: PySpark
>Affects Versions: 3.0.1, 3.1.1
>Reporter: Mark Ressler
>Priority: Major
> Attachments: jsonMetadataTest.py, nested_columns_metadata.scala
>
>
> For a DataFrame schema with nested StructTypes, where metadata is set for
> fields in the schema, that metadata is lost when a DataFrame selects nested
> fields. For example, suppose
> {code:java}
> df.schema.fields[0].dataType.fields[0].metadata
> {code}
> returns a non-empty dictionary, then
> {code:java}
> df.select('Field0.SubField0').schema.fields[0].metadata{code}
> returns an empty dictionary, where "Field0" is the name of the first field in
> the DataFrame and "SubField0" is the name of the first nested field under
> "Field0".
>
--
This message was sent by Atlassian Jira
(v8.20.1#820001)
-
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
[jira] [Updated] (SPARK-34805) PySpark loses metadata in DataFrame fields when selecting nested columns
[
https://issues.apache.org/jira/browse/SPARK-34805?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Mark Ressler updated SPARK-34805:
-
Attachment: jsonMetadataTest.py
> PySpark loses metadata in DataFrame fields when selecting nested columns
>
>
> Key: SPARK-34805
> URL: https://issues.apache.org/jira/browse/SPARK-34805
> Project: Spark
> Issue Type: Bug
> Components: PySpark
>Affects Versions: 3.0.1, 3.1.1
>Reporter: Mark Ressler
>Priority: Major
> Attachments: jsonMetadataTest.py
>
>
> For a DataFrame schema with nested StructTypes, where metadata is set for
> fields in the schema, that metadata is lost when a DataFrame selects nested
> fields. For example, suppose
> {code:java}
> df.schema.fields[0].dataType.fields[0].metadata
> {code}
> returns a non-empty dictionary, then
> {code:java}
> df.select('Field0.SubField0').schema.fields[0].metadata{code}
> returns an empty dictionary, where "Field0" is the name of the first field in
> the DataFrame and "SubField0" is the name of the first nested field under
> "Field0".
>
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
-
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
