11diff --git a/src/backend/commands/explain.c b/src/backend/commands/explain.c
2- index 92969636b7..1e705c709f 100644
2+ index 92969636b7..42446d4e93 100644
33--- a/src/backend/commands/explain.c
44+++ b/src/backend/commands/explain.c
55@@ -46,6 +46,9 @@ ExplainOneQuery_hook_type ExplainOneQuery_hook = NULL;
@@ -22,8 +22,26 @@ index 92969636b7..1e705c709f 100644
2222+
2323 ExplainCloseGroup("Query", NULL, true, es);
2424 }
25-
26- @@ -1523,6 +1530,24 @@ ExplainNode(PlanState *planstate, List *ancestors,
25+
26+ @@ -1041,6 +1048,17 @@ ExplainPreScanNode(PlanState *planstate, Bitmapset **rels_used)
27+ return planstate_tree_walker(planstate, ExplainPreScanNode, rels_used);
28+ }
29+
30+ + static bool
31+ + we_need_to_sum_tuples(const Plan *plan)
32+ + {
33+ + if (plan->path_parallel_workers > 0 && (
34+ + plan->parallel_aware || nodeTag(plan) == T_HashJoin ||
35+ + nodeTag(plan) == T_MergeJoin ||
36+ + nodeTag(plan) == T_NestLoop))
37+ + return true;
38+ + return false;
39+ + }
40+ +
41+ /*
42+ * ExplainNode -
43+ * Appends a description of a plan tree to es->str
44+ @@ -1523,6 +1541,24 @@ ExplainNode(PlanState *planstate, List *ancestors,
2745 appendStringInfo(es->str,
2846 " (actual rows=%.0f loops=%.0f)",
2947 rows, nloops);
@@ -33,8 +51,8 @@ index 92969636b7..1e705c709f 100644
3351+ int wrkrs = 1;
3452+ double error = -1.;
3553+
36- + if (planstate->worker_instrument && plan->parallel_aware )
37- + wrkrs = planstate->worker_instrument->num_workers + 1 ;
54+ + if (planstate->worker_instrument &&we_need_to_sum_tuples( plan) )
55+ + wrkrs+ = planstate->worker_instrument->num_workers;
3856+
3957+ if (plan->predicted_cardinality > 0.)
4058+ {
@@ -859,7 +877,7 @@ index f8b79ec120..b5eda01907 100644
859877 extern void ExplainQuery(ParseState *pstate, ExplainStmt *stmt, const char *queryString,
860878 ParamListInfo params, QueryEnvironment *queryEnv, DestReceiver *dest);
861879diff --git a/src/include/nodes/pathnodes.h b/src/include/nodes/pathnodes.h
862- index4b7703d478..490d67b098 100644
880+ index441e64eca9..484bca379a 100644
863881--- a/src/include/nodes/pathnodes.h
864882+++ b/src/include/nodes/pathnodes.h
865883@@ -710,6 +710,10 @@ typedef struct RelOptInfo