Linhong Liu created SPARK-36224:
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Summary: Use "void" as the type name of NullType
Key: SPARK-36224
URL: https://issues.apache.org/jira/browse/SPARK-36224
Project: Spark
Issue Type: Task
Components: SQL
Affects Versions: 3.3.0
Reporter: Linhong Liu
In PR: [https://github.com/apache/spark/pull/28833,] we support parsing "void"
as NullType. But still use "null" as the type name. This leads some confusing
and inconsistent issues. For example:
`org.apache.spark.sql.types.DataType.fromDDL(NullType.toDDL)` is not working
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