Gengliang Wang created SPARK-37163:
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Summary: Disallow casting Date as Numeric types
Key: SPARK-37163
URL: https://issues.apache.org/jira/browse/SPARK-37163
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 3.3.0
Reporter: Gengliang Wang
Assignee: Gengliang Wang
Currently, Date type values can be cast as Numeric types. However, the result
is always NULL.
On the other hand, Numeric values can't be cast as Date type.
It doesn't make sense to keep the behavior of casting Date to null numeric
types. I suggest to disallow the conversion. We can have a legacy flag
`spark.sql.legacy.allowCastDateAsNumeric` if users really want to fall back to
the legacy behavior.
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