Originally Posted by MSPeconomist

CMH = Columbus Ohio.

I doubt that SAS serves CMH to CDG nonstop.

If you mean Copenhagen, which is a SAS hub, you'll arrive at Paris as a schengen flight after entering Europe at Copenhagen, where you'll do immigration and customs. Technically you and especially your checked bags do customs also at CDG, but that's just a matter of following the green signs to exit. Unless there's a terrorism incident or something similar, there won't be a passport check for you at CDG.