*** a/src/backend/optimizer/prep/prepunion.c
--- b/src/backend/optimizer/prep/prepunion.c
***************
*** 1634,1644 **** expand_partitioned_rtentry(PlannerInfo *root, RangeTblEntry *parentrte,
  
  /*
   * expand_single_inheritance_child
!  *		Expand a single inheritance child, if needed.
!  *
!  * If this is a temp table of another backend, we'll return without doing
!  * anything at all.  Otherwise, build a RangeTblEntry and an AppendRelInfo, if
!  * appropriate, plus maybe a PlanRowMark.
   *
   * We now expand the partition hierarchy level by level, creating a
   * corresponding hierarchy of AppendRelInfos and RelOptInfos, where each
--- 1634,1641 ----
  
  /*
   * expand_single_inheritance_child
!  *		Build a RangeTblEntry and an AppendRelInfo, if appropriate, plus
!  *		maybe a PlanRowMark.
   *
   * We now expand the partition hierarchy level by level, creating a
   * corresponding hierarchy of AppendRelInfos and RelOptInfos, where each