Julian Shalaby created SPARK-35525:
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             Summary: Define UDTs in schemas using string format
                 Key: SPARK-35525
                 URL: https://issues.apache.org/jira/browse/SPARK-35525
             Project: Spark
          Issue Type: New Feature
          Components: SQL
    Affects Versions: 3.1.1
            Reporter: Julian Shalaby


In PySpark where UDTs are public in 3.1.1 for example, you can define a schema 
using UDTs in the format:

schema = StructType([StructField("Stuff", MyUDT())])

but the format

schema = "Stuff MyUDT"

does not work.

UDTs are officially being made public again in 3.2.0 for Scala, so this issue 
is pretty important now.



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