Bulk/batch update/upsert in PostgreSQL

Question

I\'m writing a Django-ORM enchancement that attempts to cache models and postpone model saving until the end of the transaction. It\'s all almost done, however I came across

Answer 1

Turn off autocommit and just do one commit at the end. In plain SQL, this means issuing BEGIN at the start and COMMIT at the end. You would need to create a function in order to do an actual upsert.