One question to the community.
Imagine I have this
Case class Person(age: int)
After a few weeks of coding I change the class to:
Case class Person(age: int, name: Option[String] = None)
Then when I run the new code on the same input it fails saying that It cannot find the name on the schema from the parquet file.
Spark version 2.3.3
How is the best way to guard or fix this? Regenerating all data seems not to be a option for us.