Why do incremental models expand column types, regardless of on_schema_change?

[nik-hinge]

Hi!

Why do incremental models call expand_column_types outside of process_schema_changes?

https://github.com/dbt-labs/dbt-core/blob/main/core/dbt/include/global_project/macros/materializations/models/incremental/incremental.sql#L42-L44

I would have guessed that this would be influenced by the value of on_schema_change, like how process_schema_changes is influenced by it.