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-rw-r--r--src/backend/optimizer/prep/prepunion.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/backend/optimizer/prep/prepunion.c b/src/backend/optimizer/prep/prepunion.c
index e361fb8ce96..7b6d12de38a 100644
--- a/src/backend/optimizer/prep/prepunion.c
+++ b/src/backend/optimizer/prep/prepunion.c
@@ -1778,6 +1778,9 @@ adjust_appendrel_attrs_mutator(Node *node,
newinfo->required_relids = adjust_relid_set(oldinfo->required_relids,
appinfo->parent_relid,
appinfo->child_relid);
+ newinfo->outer_relids = adjust_relid_set(oldinfo->outer_relids,
+ appinfo->parent_relid,
+ appinfo->child_relid);
newinfo->nullable_relids = adjust_relid_set(oldinfo->nullable_relids,
appinfo->parent_relid,
appinfo->child_relid);