The cutover is a model review, then a load
Modernization projects fail when someone copies rows and discovers six months later that types, nested documents, or procedures were guessed. Conversion Studio makes the target schema explicit. After the move, the new engine inherits pipelines, Explorer, drift, and audit so you do not modernize into an ungoverned database.
Start from the pair you actually have
Oracle to PostgreSQL
Dedicated readers and generators. No Oracle CDC. PL/SQL is not translated.
SQL Server to PostgreSQL
Tested type matrix and CDC. T-SQL is not translated.
MongoDB to MySQL
Nested documents become tables or JSON. Compare on Mongo is data-only.
Relational to Snowflake
Warehouse types drafted for Snowflake, then loaded with validation per entity.
Do not modernize into a mess
The target engine uses the same pipelines, approvals, and rollback generation as everything else you already connected.
After the move, compare PostgreSQL to PostgreSQL or MySQL to MySQL. Cross-engine structural diff is not a compare job.
PL/SQL, T-SQL, packages, and engine-specific triggers are not translated. Risk Assessment can show which repositories touch the objects you changed.