BUG #7511: 9.2: pg_stat_activity.procpid renamed unnecessarily

The following bug has been logged on the website:

Bug reference:      7511
Logged by:          Adrian Dries
Email address:      i@avdd.co
PostgreSQL version: Unsupported/Unknown
Operating system:   any
Description:        =


In trying 9.2 I find pg_stat_activity.procpid has been renamed to pid.

http://git.postgresql.org/gitweb/?p=3Dpostgresql.git;a=3Dcommitdiff;h=3D4f4=
2b546fd87a80be30c53a0f2c897acb826ad52

It seems the premise of this is

If we're going to rename current_query to query--what Scott's patch does
here--that will force all code using pg_stat_activity to be rewritten. This
seems like the perfect time to also change "procpid" to "pid", finally blow
away that wart.

A premise that is untrue: changing a subset of columns on a relation does
not force "all code" using that relation to be rewritten:

  SELECT procpid FROM pg_stat_activity WHERE procpid <> pg_backend_pid()