diff --git a/src/sql/engine/expr/ob_expr_json_merge_patch.cpp b/src/sql/engine/expr/ob_expr_json_merge_patch.cpp
index de219c7e0c..33bb7d9375 100644
--- a/src/sql/engine/expr/ob_expr_json_merge_patch.cpp
+++ b/src/sql/engine/expr/ob_expr_json_merge_patch.cpp
@@ -254,6 +254,7 @@ int ObExprJsonMergePatch::eval_ora_json_merge_patch(const ObExpr &expr, ObEvalCt
     LOG_USER_ERROR(OB_ERR_JSON_PATCH_INVALID);
   } else if (j_patch_node->json_type() != ObJsonNodeType::J_OBJECT) {
     j_base = j_patch_node;
+  } else if (OB_FAIL(ret)) {
   } else {
     ObJsonObject *j_obj = NULL;
     if (j_base->json_type() == ObJsonNodeType::J_OBJECT) {