Add compiler error for materialized views

Author: ericj-db

dbt/include/databricks/macros/relations/materialized_view/create.sql

@@ -1,4 +1,10 @@
 {% macro databricks__get_create_materialized_view_as_sql(relation, sql) -%}
+  {# Column masks result in silent failure for views, so throw custom compiler error #}
+  {% for column_name, column in model.columns.items() %}
+    {% if column is mapping and column.get('column_mask') %}
+      {% do exceptions.raise_compiler_error("Column masks are not supported for materialized views. Column '" ~ column_name ~ "' has a mask defined.") %}
+    {% endif %}
+  {% endfor %}
   {%- set materialized_view = adapter.get_config_from_model(config.model) -%}
   {%- set partition_by = materialized_view.config["partition_by"].partition_by -%}
   {%- set tblproperties = materialized_view.config["tblproperties"].tblproperties -%}

tests/functional/adapter/column_masks/test_column_mask.py

@@ -66,4 +66,14 @@ def models(self):
 
     def test_view_column_mask_failure(self, project):
         result = run_dbt(["run"], expect_pass=False)
-        assert "Column masks are not supported for views" in result.results[0].message
+        assert "Column masks are not supported" in result.results[0].message
+
+
+@pytest.mark.skip_profile("databricks_cluster")
+class TestMaterializedViewColumnMaskFailure(TestViewColumnMaskFailure):
+    @pytest.fixture(scope="class")
+    def models(self):
+        return {
+            "base_model.sql": base_model_sql.replace("table", "materialized_view"),
+            "schema.yml": model,
+        }