Wine pairing - should I drink the same wine that I used for cooking a dish alongside the dish itself?

I'm not very knowledgeable about wine pairing. I have just acquired a case of Pinot Noir and I've decided to cook a stew using the mentioned wine for a small get-together. The question is, should I pair the stew with the same Pinot Noir that I would be using for cooking it? Or is it always better to choose a different wine? What's the rule (in general) about wine pairings of wine-based dishes? Thanks!