Thanks Adrian and Tom.
Tom wrote:
It's not entirely clear what your question is, but here are some possible
answers:
1. For quite some time now, the "query" column in pg_stat_activity has
been defined as "the query currently or most recently run by the session";
it's intentional that it doesn't go back to "<idle>" anymore. You need to
look at the "state" column to tell whether the session is actively running
the query or not.
2. Are you sure that operating system user "crest" isn't connecting as
database user "postgres"?
Yes.
3. pg_cancel_backend() is only supposed to terminate the current query
(if any), not kill the session. If you want the latter try
pg_terminate_backend().
Thanks. I was under the wrong impression that pg_cancel_backend() will do both.
That answers about all my questions.
Regards
Johann