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Posted to issues@spark.apache.org by "Daniel deCordoba (Jira)" <ji...@apache.org> on 2022/04/08 21:04:00 UTC
[jira] [Commented] (SPARK-38839) Creating a struct with a float inside
[ https://issues.apache.org/jira/browse/SPARK-38839?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17519798#comment-17519798 ]
Daniel deCordoba commented on SPARK-38839:
------------------------------------------
The style got messed up, hopefully it is easy to understand this is the command that fails:
df = spark.createDataFrame([\{"MyStruct": {"MyInt": 10, "MyFloat": 10.1} , "MyFloat": 10.1}])
> Creating a struct with a float inside
> --------------------------------------
>
> Key: SPARK-38839
> URL: https://issues.apache.org/jira/browse/SPARK-38839
> Project: Spark
> Issue Type: Bug
> Components: PySpark
> Affects Versions: 3.2.1
> Reporter: Daniel deCordoba
> Priority: Minor
>
> When creating a dataframe using createDataFrame that contains a float inside a struct, the float is set to null. This only happens if using a list of dictionaries as data type, if I use a list of Rows it works fine:
> ```python
> data = [\{"MyStruct": {"MyInt": 10, "MyFloat": 10.1} , "MyFloat": 10.1}]
> spark.createDataFrame(data).show()
> #
> |MyFloat|MyStruct |
> #
> |10.1|{MyInt -> 10, MyFloat -> null}|
> data = [Row(MyStruct=Row(MyInt=10, MyFloat=10.1), MyFloat=10.1)]
> spark.createDataFrame(data).show()
> #
> |MyFloat|MyStruct |
> #
> |10.1 |{MyInt -> 10, MyFloat -> 10.1}|
> ```
> Note MyFloat inside MyStruct is set to null in the first example. Interestingly enough, when I do the same with Row, or if I specify the schema, then this does not happen (second example).
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