I'd guess that https://neon.tech/ https://neon.tech/ could help with this. Neon is branded as "Serverless Postgres". They have APIs to create branches of your d

I'd guess that https://neon.tech/ https://neon.tech/ could help with this. Neon is branded as "Serverless Postgres". They have APIs to create branches of your database. So you could effectively: 1) Create a snapshot of your production DB -> DB_2A 2) Then create a snapshot of that snapshot -> DB_2B 3) Now you have two copies of the exact same database. Run your query/workload/migration on DB_2B. 4) Run some metadata queries against DB_2A and DB_2B and compare the results. 5) If your metadata queries are inline with expectations, delete the snapshots. If not, leave them around for a bit for manual inspection.