LANTERN-595, LANTERN-596: Removal and prevention of duplicate rows in…

… healthit_products_map

db/migration/migrations/000028_remove_duplicates_healthit_products_map.up.sql

@@ -0,0 +1,24 @@
+BEGIN;
+
+
+CREATE OR REPLACE FUNCTION delete_duplicate_data_in_healthit_products_map() RETURNS VOID as $$
+    BEGIN
+        WITH CTE AS (
+    SELECT 
+        ctid,
+        ROW_NUMBER() OVER(PARTITION BY id, healthit_product_id ORDER BY id) AS DuplicateCount
+    FROM 
+        public.healthit_products_map
+)
+DELETE FROM public.healthit_products_map
+WHERE ctid IN (
+    SELECT ctid
+    FROM CTE
+    WHERE DuplicateCount > 1
+);
+    END;
+$$ LANGUAGE plpgsql;
+
+SELECT delete_duplicate_data_in_healthit_products_map();
+
+COMMIT;