Orecchiette With Pulled Pork Sugo

Name: Orecchiette With Pulled Pork Sugo
Ingredients: 2 pounds fresh pork roast (cooked until it shreds); 1 pound dry orecchiette pasta (cooked just under al dente this takes about 8 minutes its a hard pasta); 2 tablespoons olive oil; 1 yellow onion (chopped); 2 celery ribs (chopped); 3 cloves garlic (mashed); 1 tablespoon oregano; 2 tablespoon tomato paste; 1 cup white wine; 1 teaspoon salt; 1 teaspoon pepper; 2 cups chicken stock; 1 can (15 ounce) cannellini beans (drained); 1 tablespoon red wine vinegar; 1 cup water (pasta water); 1/2 cup grated parmesan cheese