During this week, I read documentation and source code of BRIN index to understand its implementation.
But later I found out that it is unlikely to implement page level or tuple level predicate locking in BRIN index. In this week, I also fixed a small issue and updated my previous patch for gin index. Currently, I am working on
sp-gist index.
It's a shame that nobody seems to be answering emails like this, but you also haven't provided much detail here - e.g. *why* is BRIN unlikely to work out well? I think I know the answer, but it'd be good to spell out your thoughts on the subject, I think.