The solution connects Salesforce to Aurora using AWS AppSync. To access Aurora data from Salesforce, the solution uses the Salesforce external-objects subsystem to invoke the Salesforce Connect adapter for GraphQL. The adapter translates requests into GraphQL queries, which it sends to the GraphQL API endpoint hosted on AWS AppSync.
https://aws.amazon.com/solutions/partners/salesforce-connect-appsync-rds-postgresql/
