Index: src/backend/utils/misc/guc.c
===================================================================
RCS file: /cvsroot/pgsql/src/backend/utils/misc/guc.c,v
retrieving revision 1.497
diff -c -c -r1.497 guc.c
*** src/backend/utils/misc/guc.c	9 Mar 2009 14:34:34 -0000	1.497
--- src/backend/utils/misc/guc.c	28 Mar 2009 23:40:52 -0000
***************
*** 4738,4747 ****
  					}
  					if (newval < conf->min || newval > conf->max)
  					{
! 						ereport(elevel,
! 								(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
! 								 errmsg("%d is outside the valid range for parameter \"%s\" (%d .. %d)",
! 										newval, name, conf->min, conf->max)));
  						return false;
  					}
  				}
--- 4738,4753 ----
  					}
  					if (newval < conf->min || newval > conf->max)
  					{
! 						if (conf->min == conf->max)
! 							ereport(elevel,
! 									(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
! 									 errmsg("parameter \"%s\" cannot be changed from %d",
! 											name, conf->min)));
! 						else
! 							ereport(elevel,
! 									(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
! 									 errmsg("%d is outside the valid range for parameter \"%s\" (%d .. %d)",
! 											newval, name, conf->min, conf->max)));
  						return false;
  					}
  				}
***************
*** 4810,4819 ****
  					}
  					if (newval < conf->min || newval > conf->max)
  					{
! 						ereport(elevel,
! 								(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
! 								 errmsg("%g is outside the valid range for parameter \"%s\" (%g .. %g)",
! 										newval, name, conf->min, conf->max)));
  						return false;
  					}
  				}
--- 4816,4831 ----
  					}
  					if (newval < conf->min || newval > conf->max)
  					{
! 						if (conf->min == conf->max)
! 							ereport(elevel,
! 									(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
! 									 errmsg("parameter \"%s\" cannot be changed from %g",
! 											name, conf->min)));
! 						else
! 							ereport(elevel,
! 									(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
! 									 errmsg("%g is outside the valid range for parameter \"%s\" (%g .. %g)",
! 											newval, name, conf->min, conf->max)));
  						return false;
  					}
  				}