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Use PostgreSQL Views in Ent Schema Using Atlas composite_schema
This example demonstrates how to define an ent.View but keep its definition and creation externally using the Atlas
composite_schema data source. This option allows users controlling the way views are created, their dependencies, and
the SQL definition itself, that might not be supported by the build-in SQL builders.
The second approach is to define an ent.View with its SQL definition (AS ...) in the Ent schema. The big advantage
of the non-composite_schema approach is that the CREATE VIEW correctness is checked during migration and not during queries.
For example, if one of the ent.Fields defined in your ent/schema does not exist in your SQL definition, PostgreSQL will return the
following error:
create "clean_users" view: pq: CREATE VIEW specifies more column names than columns