*** pgbench.c	Wed Jan  6 10:37:51 2010
--- pgbench.debug.c	Thu Jan  7 15:03:40 2010
***************
*** 810,815 ****
--- 810,835 ----
  			switch (PQresultStatus(res))
  			{
  				case PGRES_COMMAND_OK:
+ /* DEBUG */
+ 					if (atoi(PQcmdTuples(res)) != 1 &&
+ 						strncmp(commands[st->state]->argv[0], "UPDATE", 6) == 0)
+ 					{
+ 						int		i;
+ 
+ 						fprintf(stderr, "[%d] miss update: %s => %s\n",
+ 							st->id,
+ 							commands[st->state]->argv[0],
+ 							PQcmdStatus(res));
+ 						for (i = 0; i < st->nvariables; i++)
+ 						{
+ 							fprintf(stderr, "[%d] variable: %s = %s\n",
+ 								st->id,
+ 								st->variables[i].name,
+ 								st->variables[i].value);
+ 						}
+ 					}
+ 					break;	/* OK */
+ /* DEBUG */
  				case PGRES_TUPLES_OK:
  					break;	/* OK */
  				default: