Major Description
SPARK-38240 mistakenly disallowed numeric type at to_timestamp. We should allow it back:
spark.range(1).selectExpr("to_timestamp(id)").show()
Before
+-------------------+ | to_timestamp(id)| +-------------------+ |1970-01-01 09:00:00| +-------------------+
After
+-----------------+
| to_timestamp(id)|
+-----------------+
| null|
+-----------------+
