Symptoms
When you use PolyBase Generic ODBC connector to query Spark that uses the Microsoft Spark ODBC Driver, the type mapping for the "STRING" type will recommend CHAR(8000) instead of VARCHAR(MAX) in SQL Server 2019.
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Resolution
This issue is fixed in the following cumulative update for SQL Server:
About cumulative updates for SQL Server:
Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server:
References
Learn about the terminology that Microsoft uses to describe software updates.
