dosubot[bot] commented on issue #30600:
URL: https://github.com/apache/superset/issues/30600#issuecomment-2412327114
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I found a similar closed issue regarding a database driver error when
connecting with Snowflake from Superset. The suggested solution was to use the
connection string format
`snowflake://{user}:{password}@{account}.{region}/{database}` by dropping the
parts after '?'
<sup>[[1]](https://github.com/apache/superset/issues/24695)</sup>.
In your case, the error message `'NullType' object is not callable` suggests
that there might be an issue with how the Snowflake data types are being mapped
to SQLAlchemy types. This could be related to the `snowflake-sqlalchemy`
library's handling of nullable columns, which might be causing a `NullType`
object to be incorrectly instantiated.
You might want to check if there are any updates or patches for the
`snowflake-sqlalchemy` library that address this issue. Additionally, reviewing
the data type mappings and ensuring that the Snowflake columns are correctly
defined and compatible with SQLAlchemy could help resolve the problem.
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