Fix condition to regenerate gather paths

Core has additional condition to determine whether to generate gather
paths and pg_hint_plan forgot it. Fix it.

diff --git a/pg_hint_plan.c b/pg_hint_plan.c
index 302aa36..794aac4 100644 (file)
--- a/pg_hint_plan.c
+++ b/pg_hint_plan.c
@@ -4723,7 +4723,8 @@ pg_hint_plan_set_rel_pathlist(PlannerInfo * root, RelOptInfo *rel,
                                }
 
                                /* Generate gather paths */
-                               if (rel->reloptkind == RELOPT_BASEREL)
+                               if (rel->reloptkind == RELOPT_BASEREL &&
+                                       bms_membership(root->all_baserels) != BMS_SINGLETON)
                                        generate_gather_paths(root, rel, false);
                        }
                }