Simplifications per review

dbt/adapters/snowflake/impl.py

@@ -9,6 +9,7 @@
     CapabilitySupport,
     ConstraintSupport,
     Support,
+    CapabilityDict,
 )  # type: ignore
 from dbt.adapters.base.meta import available
 from dbt.adapters.sql import SQLAdapter  # type: ignore
@@ -55,16 +56,18 @@ class SnowflakeAdapter(SQLAdapter):
         ConstraintType.foreign_key: ConstraintSupport.NOT_ENFORCED,
     }
 
-    _capabilities: Dict[Capability, CapabilitySupport] = {
-        Capability.TableLastModifiedMetadata: CapabilitySupport(
-            capability=Capability.TableLastModifiedMetadata,
-            support=Support.Full,
-        ),
-        Capability.SchemaMetadataByRelations: CapabilitySupport(
-            capability=Capability.SchemaMetadataByRelations,
-            support=Support.NotImplemented,
-        ),
-    }
+    _capabilities: CapabilityDict = CapabilityDict(
+        {
+            Capability.TableLastModifiedMetadata: CapabilitySupport(
+                capability=Capability.TableLastModifiedMetadata,
+                support=Support.Full,
+            ),
+            Capability.SchemaMetadataByRelations: CapabilitySupport(
+                capability=Capability.SchemaMetadataByRelations,
+                support=Support.NotImplemented,
+            ),
+        }
+    )
 
     @classmethod
     def date_function(cls):
@@ -277,14 +280,5 @@ def debug_query(self):
         """Override for DebugTask method"""
         self.execute("select 1 as id")
 
-    def capabilities(self) -> List[CapabilitySupport]:
-        return [c for c in self._capabilities.values()]
-
-    def capability_support(self, capability: Capability) -> CapabilitySupport:
-        if capability in self._capabilities:
-            return self._capabilities[capability]
-        else:
-            return CapabilitySupport(
-                capability=capability,
-                support=Support.Unknown,
-            )
+    def capabilities(self) -> CapabilityDict:
+        return self._capabilities