fix(mssql): accounting for schema_name.name

Signed-off-by: Cortland Goffena <30168413+cmgoffena13@users.noreply.github.com>

Author: cmgoffena13

sqlmesh/core/engine_adapter/mssql.py

@@ -203,7 +203,11 @@ def drop_schema(
                         exists=ignore_if_not_exists,
                     )
 
-        schema = schema_name.db if isinstance(schema_name, exp.Table) else schema_name
+        schema = (
+            (schema_name.db or schema_name.name)
+            if isinstance(schema_name, exp.Table)
+            else schema_name
+        )
         if schema.lower() == "dbo":
             return
 

tests/core/engine_adapter/test_mssql.py

@@ -727,12 +727,24 @@ def test_drop_schema_skips_dbo(make_mocked_engine_adapter: t.Callable):
         )
     ]
 
+    # String "dbo" path (original coverage)
     adapter.drop_schema("dbo", cascade=True)
 
     sql_calls = to_sql_calls(adapter)
     assert """DROP VIEW IF EXISTS [dbo].[test_view];""" in sql_calls
     assert """DROP SCHEMA IF EXISTS [dbo];""" not in sql_calls
 
+    # exp.to_table("dbo") path — schema ends up in .name, not .db
+    adapter2 = make_mocked_engine_adapter(MSSQLEngineAdapter)
+    adapter2._get_data_objects = mock.Mock()
+    adapter2._get_data_objects.return_value = []
+
+    schema_name = exp.to_table("dbo", dialect="tsql")
+    adapter2.drop_schema(schema_name, cascade=False)
+
+    sql_calls2 = to_sql_calls(adapter2)
+    assert """DROP SCHEMA IF EXISTS [dbo];""" not in sql_calls2
+
 
 def test_drop_schema_with_special_identifiers(make_mocked_engine_adapter: t.Callable):
     adapter = make_mocked_engine_adapter(MSSQLEngineAdapter)