turn on get_catalog by relation capability

dbt/adapters/redshift/impl.py

@@ -5,6 +5,7 @@
 from dbt.adapters.base import PythonJobHelper
 from dbt.adapters.base.impl import AdapterConfig, ConstraintSupport
 from dbt.adapters.base.meta import available
+from dbt.adapters.capability import Capability, CapabilityDict, CapabilitySupport, Support
 from dbt.adapters.sql import SQLAdapter
 from dbt.contracts.connection import AdapterResponse
 from dbt.contracts.graph.nodes import ConstraintType
@@ -53,6 +54,10 @@ class RedshiftAdapter(SQLAdapter):
         ConstraintType.foreign_key: ConstraintSupport.NOT_ENFORCED,
     }
 
+    _capabilities = CapabilityDict(
+        {Capability.SchemaMetadataByRelations: CapabilitySupport(support=Support.Full)}
+    )
+
     @classmethod
     def date_function(cls):
         return "getdate()"