IIUIC, the most significant difference from a materialized view is that the Rama infrastructure recompute only the changed data by checking the relationship between fields, while a traditional materialized view recomputes the whole table?
incremental view maintenance is the database equivalent of: "recompute only the changed data by checking the relationship between fields,"
Oracle has decent support for incrementally updated materialized views, redshift has some too. Materialize.com is an entire snowflake-like platform built around incrementally maintained materialized views.
