diff --git a/src/backend/utils/error/elog.c b/src/backend/utils/error/elog.c
new file mode 100644
index a40b343..68b7ab3
*** a/src/backend/utils/error/elog.c
--- b/src/backend/utils/error/elog.c
*************** log_line_prefix(StringInfo buf, ErrorDat
*** 1970,1976 ****
  				}
  				break;
  			case 'c':
! 				appendStringInfo(buf, "%lx.%x", (long) (MyStartTime), MyProcPid);
  				break;
  			case 'p':
  				appendStringInfo(buf, "%d", MyProcPid);
--- 1970,1976 ----
  				}
  				break;
  			case 'c':
! 				appendStringInfo(buf, "%lx.%04x", (long) (MyStartTime), MyProcPid);
  				break;
  			case 'p':
  				appendStringInfo(buf, "%d", MyProcPid);
*************** write_csvlog(ErrorData *edata)
*** 2149,2155 ****
  	appendStringInfoChar(&buf, ',');
  
  	/* session id */
! 	appendStringInfo(&buf, "%lx.%x", (long) MyStartTime, MyProcPid);
  	appendStringInfoChar(&buf, ',');
  
  	/* Line number */
--- 2149,2155 ----
  	appendStringInfoChar(&buf, ',');
  
  	/* session id */
! 	appendStringInfo(&buf, "%lx.%04x", (long) MyStartTime, MyProcPid);
  	appendStringInfoChar(&buf, ',');
  
  	/* Line number */