This is where you'd want to be looking in the source: https://github.com/rails/rails/tree/master/activerecord/lib/active_record/connection_adapters/postgresql h

This is where you'd want to be looking in the source: https://github.com/rails/rails/tree/master/activerecord/lib/active_record/connection_adapters/postgresql https://github.com/rails/rails/tree/master/activerecord/lib/... Specifically at any error handling, which I think would likely be here: https://github.com/rails/rails/blob/master/activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb https://github.com/rails/rails/blob/master/activerecord/lib/...