Reviewed by Aditya Kumar · Last reviewed 2026-03-24
**Case Class (Scala):** `case class Person(name: String, age: Int)`—immutable, auto equals/hashCode. **StructType (Spark):** `StructType([StructField('name', StringType()), ...])`. **Mapping:** Case classes → Spark rows. **When:** StructType for dynamic/Python; Case Class for...
Pro-Move: Schema evolution with StructType. Red Flag: Ignoring type safety in Scala.
Case Class (Scala): case class Person(name: String, age: Int)—immutable, auto equals/hashCode. StructType (Spark): StructType([StructField('name', StringType()), ...]). Mapping: Case classes → Spark rows. When: StructType for dynamic/Python; Case Class for type-safe Scala. Production: Case Class for UDFs; StructType for schema evolution.
Pro-Move: Schema evolution with StructType. Red Flag: Ignoring type safety in Scala.
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