Introducing Aggregation Queries for Computed Fields

The Hasura team has implemented aggregation queries for computed fields in GraphQL Engine. This feature allows users to aggregate computed fields just like any other fields, making it easier to compute values based on the current state of application data without requiring table schema changes or additional database triggers. Parsing and generating SQL for these queries involve extending the query parser, intermediate representation, and aggregation query generator to recognize and handle computed fields appropriately. This feature is available in Hasura v2.27 for Postgres.