Len Frodgers created SPARK-19871:
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Summary: Improve error message in verify_type to indicate which
field the error is for
Key: SPARK-19871
URL: https://issues.apache.org/jira/browse/SPARK-19871
Project: Spark
Issue Type: Bug
Components: PySpark, SQL
Affects Versions: 2.1.0, 2.0.2
Reporter: Len Frodgers
The error message for _verify_type is too vague. It should specify for which
field the type verification failed.
e.g. error: "This field is not nullable, but got None" – but what is the field?!
In a dataframe with many non-nullable fields, it is a nightmare trying to hunt
down which field is null, since one has to resort to basic (and very slow)
trial and error.
I have happily created a PR to fix this.
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