diff --git a/src/backend/optimizer/path/allpaths.c b/src/backend/optimizer/path/allpaths.c
index cc8ba61..8ab049c 100644
*** a/src/backend/optimizer/path/allpaths.c
--- b/src/backend/optimizer/path/allpaths.c
*************** set_rel_consider_parallel(PlannerInfo *r
*** 560,574 ****
  		case RTE_SUBQUERY:
  
  			/*
! 			 * Subplans currently aren't passed to workers.  Even if they
! 			 * were, the subplan might be using parallelism internally, and we
! 			 * can't support nested Gather nodes at present.  Finally, we
! 			 * don't have a good way of knowing whether the subplan involves
! 			 * any parallel-restricted operations.  It would be nice to relax
! 			 * this restriction some day, but it's going to take a fair amount
! 			 * of work.
  			 */
! 			return;
  
  		case RTE_JOIN:
  			/* Shouldn't happen; we're only considering baserels here. */
--- 560,574 ----
  		case RTE_SUBQUERY:
  
  			/*
! 			 * If the subquery doesn't have anything parallel-restricted, we
! 			 * can consider parallel scans.  Note that this does not mean that
! 			 * all (or even any) of the paths produced for the subquery will
! 			 * actually be parallel-safe; but that's true for paths produced
! 			 * for regular tables, too.
  			 */
! 			if (has_parallel_hazard((Node *) rte->subquery, false))
! 				return;
! 			break;
  
  		case RTE_JOIN:
  			/* Shouldn't happen; we're only considering baserels here. */