ARCore Database changes at runtime

Hy! I started to learn AR in Unity with Google's ARCore API. I made a small project in which I want to implement runtime Database changes. I mean, I want to add Images to Database at runtime. I searched on Google about this topic but I got positive and negative feedback. Some of the comments declare that it is not possible, or it is not yet supported in Unity. Others says that it is totally available. On the official ARCore site strongly declares that it is possible, however even in the last month there were comments in which they said it is not possible. Can somebody give me an answer if it is available or not? (My test phone not yet arrived, and if it is not possible then I should not use it.)