Fix parsing of database results for materialized view autorefresh (#643)

* map t/f to bool for database results

* remove unnecessary test that did not properly test its hypothesis

* changelog

(cherry picked from commit b4176b9)

.changes/unreleased/Fixes-20231025-203732.yaml

@@ -0,0 +1,6 @@
+kind: Fixes
+body: Fix parsing of database results for materialized view auto refresh
+time: 2023-10-25T20:37:32.191259-04:00
+custom:
+  Author: mikealfare
+  Issue: "643"

dbt/adapters/redshift/relation_configs/materialized_view.py

@@ -174,10 +174,14 @@ def parse_relation_results(cls, relation_results: RelationResults) -> dict:
             "mv_name": materialized_view.get("table"),
             "schema_name": materialized_view.get("schema"),
             "database_name": materialized_view.get("database"),
-            "autorefresh": materialized_view.get("autorefresh"),
             "query": cls._parse_query(query.get("definition")),
         }
 
+        autorefresh_value = materialized_view.get("autorefresh")
+        if autorefresh_value is not None:
+            bool_filter = {"t": True, "f": False}
+            config_dict["autorefresh"] = bool_filter.get(autorefresh_value, autorefresh_value)
+
         # the default for materialized views differs from the default for diststyle in general
         # only set it if we got a value
         if materialized_view.get("diststyle"):

tests/functional/adapter/materialized_view_tests/test_materialized_views.py

@@ -142,6 +142,19 @@ def test_change_is_applied_via_alter(self, project, my_materialized_view):
         assert_message_in_logs(f"Applying ALTER to: {my_materialized_view}", logs)
         assert_message_in_logs(f"Applying REPLACE to: {my_materialized_view}", logs, False)
 
+    def test_change_is_applied_via_alter_str_true(self, project, my_materialized_view):
+        self.check_start_state(project, my_materialized_view)
+
+        self.change_config_via_alter_str_true(project, my_materialized_view)
+        _, logs = run_dbt_and_capture_with_retries_redshift_mv(
+            ["--debug", "run", "--models", my_materialized_view.name]
+        )
+
+        self.check_state_alter_change_is_applied(project, my_materialized_view)
+
+        assert_message_in_logs(f"Applying ALTER to: {my_materialized_view}", logs)
+        assert_message_in_logs(f"Applying REPLACE to: {my_materialized_view}", logs, False)
+
     def test_change_is_applied_via_replace(self, project, my_materialized_view):
         self.check_start_state(project, my_materialized_view)