The community development is based on patches. If you propose some feature, usually you should implement it. Probably nobody will implement it instand you.
I am Java developer - I wish, but I can't
I am sorry, but you cannot expect, so somebody will accept your proposal extra seriously. Proposing some feature is a simple thing, but implementing some not trivial feature requires hundreds of hours of development.
You can check the work on features for Postgres https://commitfest.postgresql.org/ and I don't think so there is a lot of free capacity for implementing some new features partially redundant to already supported features.
