diff options
| -rw-r--r-- | src/backend/executor/nodeSubplan.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/backend/executor/nodeSubplan.c b/src/backend/executor/nodeSubplan.c index 6b6f4c3f55d..ac3382f917a 100644 --- a/src/backend/executor/nodeSubplan.c +++ b/src/backend/executor/nodeSubplan.c @@ -794,7 +794,15 @@ ExecInitSubPlan(SubPlan *subplan, PlanState *parent) sstate->planstate = (PlanState *) list_nth(estate->es_subplanstates, subplan->plan_id - 1); - /* ... and to its parent's state */ + /* + * This check can fail if the planner mistakenly puts a parallel-unsafe + * subplan into a parallelized subquery; see ExecSerializePlan. + */ + if (sstate->planstate == NULL) + elog(ERROR, "subplan \"%s\" was not initialized", + subplan->plan_name); + + /* Link to parent's state, too */ sstate->parent = parent; /* Initialize subexpressions */ |