Amazon Redshift adapter behavior changes
The restrict_direct_pg_catalog_access flag
Originally, the dbt-redshift adapter was built on top of the dbt-postgres adapter and used Postgres tables for metadata access. When this flag is enabled, the adapter uses the Redshift API (through the Python client) if available, or queries Redshift's information_schema tables instead of using the pg_ tables.
While you shouldn't notice any behavior changes due to this change, however, to be cautious dbt Labs is gating it behind a behavior-change flag and encouraging you to test it before it becoming the default.
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