[GitHub] [spark] ulysses-you opened a new pull request #25085: [SPARK-28313][SQL] Spark sql null type incompatible with hive void type

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ulysses-you opened a new pull request #25085: [SPARK-28313][SQL] Spark sql null type incompatible with hive void type
URL: https://github.com/apache/spark/pull/25085
 
 
   ## What changes were proposed in this pull request?
   
    [Similar jira](https://issues.apache.org/jira/browse/SPARK-20680), but actually this Jira was not solved. 
   
   Spark is incompatible with hive void type. When table schema contains void type, spark throw exception in ddl option, like desc, show create table..
   
   Also, spark catalog.createTable can create NullType Table that is not allowed.
   
   Goal:
   
   1. Support hive void column type for `desc`,`show create table` option
   2. Add rule to throw exception when catalog.create NullType StructField
   
   ## How was this patch tested?
   
   UT
   

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