*** a/src/backend/optimizer/util/relnode.c
--- b/src/backend/optimizer/util/relnode.c
***************
*** 676,683 **** build_join_rel(PlannerInfo *root,
   * 'sjinfo': child-join context info
   * 'restrictlist': list of RestrictInfo nodes that apply to this particular
   *		pair of joinable relations
!  * 'join_appinfos': list of AppendRelInfo nodes for base child relations
!  *		involved in this join
   */
  RelOptInfo *
  build_child_join_rel(PlannerInfo *root, RelOptInfo *outer_rel,
--- 676,682 ----
   * 'sjinfo': child-join context info
   * 'restrictlist': list of RestrictInfo nodes that apply to this particular
   *		pair of joinable relations
!  * 'jointype' is the join type (inner, left, full, etc)
   */
  RelOptInfo *
  build_child_join_rel(PlannerInfo *root, RelOptInfo *outer_rel,