Merge pull request #83528 from shriram-muthukrishnan/patch-5

Update tutorial-azure-postgresql-to-azure-postgresql-online-portal.md

Author: ktoliver

articles/dms/tutorial-azure-postgresql-to-azure-postgresql-online-portal.md

@@ -100,60 +100,9 @@ To complete all the database objects like table schemas, indexes and stored proc
     ```
     psql -h mypgserver-source.postgres.database.azure.com  -U pguser@mypgserver-source -d dvdrental citus < dvdrentalSchema.sql
     ```
-
-4. To extract the drop foreign key script and add it at the destination (Azure Database for PostgreSQL), in PgAdmin or in psql, run the following script.
-
-   > [!IMPORTANT]
-   > Foreign keys in your schema will cause the initial load and continuous sync of the migration to fail.
-
-    ```
-    SELECT Q.table_name
-        ,CONCAT('ALTER TABLE ','"', table_schema,'"', '.','"', table_name ,'"', STRING_AGG(DISTINCT CONCAT(' DROP CONSTRAINT ','"', foreignkey,'"'), ','), ';') as DropQuery
-            ,CONCAT('ALTER TABLE ','"', table_schema,'"', '.','"', table_name,'"', STRING_AGG(DISTINCT CONCAT(' ADD CONSTRAINT ','"', foreignkey,'"', ' FOREIGN KEY (','"', column_name,'"', ')', ' REFERENCES ','"', foreign_table_schema,'"', '.','"', foreign_table_name,'"', '(','"', foreign_column_name,'"', ')',' ON UPDATE ',update_rule,' ON DELETE ',delete_rule), ','), ';') as AddQuery
-    FROM
-        (SELECT
-        S.table_schema,
-        S.foreignkey,
-        S.table_name,
-        STRING_AGG(DISTINCT S.column_name, ',') AS column_name,
-        S.foreign_table_schema,
-        S.foreign_table_name,
-        STRING_AGG(DISTINCT S.foreign_column_name, ',') AS foreign_column_name,
-        S.update_rule,
-        S.delete_rule
-    FROM
-        (SELECT DISTINCT
-        tc.table_schema,
-        tc.constraint_name AS foreignkey,
-        tc.table_name,
-        kcu.column_name,
-        ccu.table_schema AS foreign_table_schema,
-        ccu.table_name AS foreign_table_name,
-        ccu.column_name AS foreign_column_name,
-        rc.update_rule AS update_rule,
-        rc.delete_rule AS delete_rule
-        FROM information_schema.table_constraints AS tc
-        JOIN information_schema.key_column_usage AS kcu ON tc.constraint_name = kcu.constraint_name AND tc.table_schema = kcu.table_schema
-        JOIN information_schema.constraint_column_usage AS ccu ON ccu.constraint_name = tc.constraint_name AND ccu.table_schema = tc.table_schema
-        JOIN information_schema.referential_constraints as rc ON rc.constraint_name = tc.constraint_name AND rc.constraint_schema = tc.table_schema
-    WHERE constraint_type = 'FOREIGN KEY'
-        ) S
-        GROUP BY S.table_schema, S.foreignkey, S.table_name, S.foreign_table_schema, S.foreign_table_name,S.update_rule,S.delete_rule
-        ) Q
-        GROUP BY Q.table_schema, Q.table_name;
-    ```
-
-5. Run the drop foreign key (which is the second column) in the query result.
-
-6. To disable triggers in target database, run the script below.
-
-   > [!IMPORTANT]
-   > Triggers (insert or update) in the data enforce data integrity in the target ahead of the data being replicated  from the source. As a result, it's recommended that you disable triggers in all the tables **at the target** during migration, and then re-enable the triggers after migration is complete.
-
-    ```
-    SELECT DISTINCT CONCAT('ALTER TABLE ', event_object_schema, '.', event_object_table, ' DISABLE TRIGGER ', trigger_name, ';')
-    FROM information_schema.triggers
-    ```
+    
+   > [!NOTE]
+   > The migration service internally handles the enable/disable of foreign keys and triggers to ensure a reliable and robust data migration. As a result, you do not have to worry about making any modifications to the target database schema.
 
 [!INCLUDE [resource-provider-register](../../includes/database-migration-service-resource-provider-register.md)]