You can clone with
When running propel-gen, if tables exist in the same db but are not defined in the schema.xml, the migration script results in DROP TABLE IF EXISTS statements. This (may) occur also on Views.
It'd be great to have the DROP TABLE be toggle-based in build.properties or have some more control over this behavior.
Well, it won't be added as Propel 1.6 is now bug fixes only.