Hylocereus

Great looking plant. Dragonfruit initially takes a few years to fruit. If you want the plant to eventually produce fruit it needs to be divided up to allow it to grow. You can separate two to three plants and experiment. Stores sell them this way for ornamental purposes. I started my dragonfruit from a mother plant cutting. It was purchased online. I also have a few from seed but those will take years before they reach the size of my other dragonfruit.

Yeah it's still in the store pot.