Update the SQL server adapter to override the supported incremental strategies that are set in the Fabric adapater to add back in merge.

There are no macros in either the Fabric or SQLServer adapater for the merge type, its all handled by the default DBT implementation.

Author: Benjamin-Knight

dbt/adapters/sqlserver/sqlserver_adapter.py

@@ -59,3 +59,9 @@ def render_model_constraint(cls, constraint) -> Optional[str]:
     @classmethod
     def date_function(cls):
         return "getdate()"
+
+    def valid_incremental_strategies(self):
+        """The set of standard builtin strategies which this adapter supports out-of-the-box.
+        Not used to validate custom strategies defined by end users.
+        """
+        return ["append", "delete+insert", "merge", "microbatch"]