[WIP]

database_maintenance/script_1.sql

@@ -0,0 +1,26 @@
+CREATE TABLE notification_history_pivot AS SELECT * FROM notification_history WHERE 1=2;
+ALTER TABLE notification_history_pivot ADD PRIMARY KEY (id);
+
+-- Update values of notification_status, billable_units, updated_at, sent_by, sent_at based on new updates coming into the notification_history table.
+CREATE OR REPLACE FUNCTION update_pivot_table()
+RETURNS TRIGGER
+LANGUAGE plpgsql AS
+$$
+BEGIN
+    UPDATE notification_history_pivot SET   notification_status = NEW.notification_status,
+                                            billable_units = NEW.billable_units,
+                                            updated_at = NEW.updated_at,
+                                            sent_by = NEW.sent_by,
+                                            sent_at = NEW.sent_at
+    WHERE notification_history_pivot.id = NEW.id;
+
+    RETURN NEW;
+END
+$$;
+
+DROP TRIGGER IF EXISTS update_pivot on notification_history;
+CREATE TRIGGER update_pivot AFTER UPDATE OF notification_status, billable_units, updated_at, sent_by, sent_at ON notification_history
+FOR EACH ROW
+  EXECUTE PROCEDURE update_pivot_table();
+
+create index concurrently created_id_nh on notification_history (created_at, id);