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-rw-r--r--src/backend/optimizer/util/clauses.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/src/backend/optimizer/util/clauses.c b/src/backend/optimizer/util/clauses.c
index 5344f6167a6..652843a146f 100644
--- a/src/backend/optimizer/util/clauses.c
+++ b/src/backend/optimizer/util/clauses.c
@@ -1223,13 +1223,17 @@ max_parallel_hazard_walker(Node *node, max_parallel_hazard_context *context)
/*
* We can't pass Params to workers at the moment either, so they are also
- * parallel-restricted, unless they are PARAM_EXEC Params listed in
- * safe_param_ids, meaning they could be generated within the worker.
+ * parallel-restricted, unless they are PARAM_EXTERN Params or are
+ * PARAM_EXEC Params listed in safe_param_ids, meaning they could be
+ * generated within the worker.
*/
else if (IsA(node, Param))
{
Param *param = (Param *) node;
+ if (param->paramkind == PARAM_EXTERN)
+ return false;
+
if (param->paramkind != PARAM_EXEC ||
!list_member_int(context->safe_param_ids, param->paramid))
{