diff --git a/src/sql/engine/set/ob_hash_set_vec_op.cpp b/src/sql/engine/set/ob_hash_set_vec_op.cpp
index a428464003..450a982358 100644
--- a/src/sql/engine/set/ob_hash_set_vec_op.cpp
+++ b/src/sql/engine/set/ob_hash_set_vec_op.cpp
@@ -294,7 +294,11 @@ int ObHashSetVecOp::convert_vector(const common::ObIArray<ObExpr*> &src_exprs,
         } else {
           to_vec_header = from_vec_header;
           if (from->is_nested_expr()) {
-            OZ(to->assign_nested_vector(*from, eval_ctx_));
+            if (OB_FAIL(to->assign_nested_vector(*from, eval_ctx_))) {
+              LOG_WARN("assign nested vector failed", K(ret));
+            } else if (OB_FAIL(to->nested_cast_to_uniform(child_brs->size_, eval_ctx_, child_brs->skip_))) {
+              LOG_WARN("failed to cast nested expr to uniform", K(ret));
+            }
           }
         }
         // init eval info