Re: query_id, pg_stat_activity, extended query protocol

> Okay, that's what I precisely wanted to understand: queryId doesn't have
> semantics to show the job that consumes resources right now—it is mostly
> about convenience to know that the backend processes nothing except
> (probably) this query.

It may be a good idea to expose in pg_stat_activity or a
supplemental activity view information about the current state of the
query processing. i.e. Is it parsing, planning or executing a query or
is it processing a nested query. 

I can see this being useful and perhaps could be taken up in a 
separate thread.

Regards,

Sami