Originally Posted by
star_world
No, you won't have to collect your bags. They will be checked all the way through. You will clear Shengen immigration in CDG and the CDG-BCN flight will be treated as "domestic".
Indeed, but I'm pretty sure there is a security screening between the arrival and the departure gates, so liquids would be confiscated. I know that I had to pass through one last time I transited CDG.