GitHub user gatorsmile opened a pull request:
https://github.com/apache/spark/pull/16636
[SPARK-19279] [SQL] Block Creating a Hive Table With an Empty Schema
### What changes were proposed in this pull request?
So far, we allow users to create a table with an empty schema: `CREATE
TABLE tab1`. This could break many code paths if we enable it. Thus, we should
follow Hive to block it.
### How was this patch tested?
Added test cases for both Hive and data source tables
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/gatorsmile/spark fixEmptyTableSchema
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/16636.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #16636
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