Index: src/backend/postmaster/pgstat.c
===================================================================
RCS file: /projects/cvsroot/pgsql/src/backend/postmaster/pgstat.c,v
retrieving revision 1.179
diff -c -r1.179 pgstat.c
*** src/backend/postmaster/pgstat.c	15 Aug 2008 08:37:39 -0000	1.179
--- src/backend/postmaster/pgstat.c	25 Aug 2008 09:08:46 -0000
***************
*** 2264,2269 ****
--- 2264,2294 ----
  }
  
  /* ----------
+  * pgstat_report_change_authorization()
+  * 
+  *      Called from *** to report the changing of session authorization.
+  * ----------
+  */
+ void
+ pgstat_report_change_authorization(void)
+ {
+         volatile PgBackendStatus *beentry = MyBEEntry;
+ 
+         if (!pgstat_track_activities || !beentry)
+                 return;
+ 
+         /*
+          * Update my status entry, following the protocol of bumping
+          * st_changecount before and after.  We use a volatile pointer
+          * here to ensure the compiler doesn't try to get cute.
+          */
+         beentry->st_changecount++;
+         beentry->st_userid = GetSessionUserId();
+         beentry->st_changecount++;
+         Assert((beentry->st_changecount & 1) == 0);
+ }
+ 
+ /* ----------
   * pgstat_report_waiting() -
   *
   *	Called from lock manager to report beginning or end of a lock wait.
Index: src/backend/utils/init/miscinit.c
===================================================================
RCS file: /projects/cvsroot/pgsql/src/backend/utils/init/miscinit.c,v
retrieving revision 1.167
diff -c -r1.167 miscinit.c
*** src/backend/utils/init/miscinit.c	27 Mar 2008 17:24:16 -0000	1.167
--- src/backend/utils/init/miscinit.c	25 Aug 2008 09:08:46 -0000
***************
*** 349,354 ****
--- 349,357 ----
  	/* We force the effective user IDs to match, too */
  	OuterUserId = userid;
  	CurrentUserId = userid;
+ 
+ 	/* Let the stats subsystem know of the change */
+ 	pgstat_report_change_authorization();
  }
  
  
Index: src/include/pgstat.h
===================================================================
RCS file: /projects/cvsroot/pgsql/src/include/pgstat.h,v
retrieving revision 1.78
diff -c -r1.78 pgstat.h
*** src/include/pgstat.h	15 Aug 2008 08:37:40 -0000	1.78
--- src/include/pgstat.h	25 Aug 2008 09:08:46 -0000
***************
*** 626,631 ****
--- 626,632 ----
  
  extern void pgstat_report_activity(const char *what);
  extern void pgstat_report_xact_timestamp(TimestampTz tstamp);
+ extern void pgstat_report_change_authorization(void);
  extern void pgstat_report_waiting(bool waiting);
  extern const char *pgstat_get_backend_current_activity(int pid, bool checkUser);