SELECT 'alter table ' || tc.table_name || ' drop constraint ' || tc.constraint_name || ', ADD CONSTRAINT ' || tc.constraint_name || ' FOREIGN KEY (' || kcu.column_name || ') REFERENCES ' || ccu.table_name || '(' || ccu.column_name || ') ON DELETE CASCADE;'
FROM information_schema.table_constraints AS tc
JOIN information_schema.key_column_usage AS kcu ON tc.constraint_name = kcu.constraint_name
JOIN information_schema.constraint_column_usage AS ccu ON ccu.constraint_name = tc.constraint_name
WHERE constraint_type = 'FOREIGN KEY';