[GitHub] [spark] LantaoJin commented on pull request #28833: [SPARK-20680][SQL] Make null type in Spark sql to be compatible with Hive void datatype

[GitBox <gi...@apache.org>]

LantaoJin commented on pull request #28833:
URL: https://github.com/apache/spark/pull/28833#issuecomment-647957153


   Emmm, thanks @wangyum . I think we should keep the same behavior with Hive2.x. Throw more readable exceptions for below SQLs.
   ```sql
   create table t as select 1 x, null z from dual;
   create table t as select null as null_col
   create table t (v void);
   ```
   @cloud-fan 


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