From 1c43b29f01f831819dac64178f5e57edcbdf4fd6 Mon Sep 17 00:00:00 2001
From: obdev <obdev@oceanbase.com>
Date: Fri, 8 Sep 2023 13:06:15 +0800
Subject: [PATCH] to issue<52035999>:fix execute anonymous block using dynamic
 sql issue

---
 src/sql/resolver/cmd/ob_anonymous_block_resolver.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/sql/resolver/cmd/ob_anonymous_block_resolver.cpp b/src/sql/resolver/cmd/ob_anonymous_block_resolver.cpp
index 048ea06f7b..1cf31aaca3 100644
--- a/src/sql/resolver/cmd/ob_anonymous_block_resolver.cpp
+++ b/src/sql/resolver/cmd/ob_anonymous_block_resolver.cpp
@@ -114,7 +114,9 @@ int ObAnonymousBlockResolver::resolve_anonymous_block(
                               false,
                               p_param_list);
     for (int64_t i = 0; OB_SUCC(ret) && i < params_.query_ctx_->question_marks_count_; ++i) {
-      OZ (param_list.push_back(ObObjParam(ObObj(ObNullType))));
+      ObObjParam param = ObObjParam(ObObj(ObNullType));
+      const_cast<ObObjMeta&>(param.get_null_meta()).reset();
+      OZ (param_list.push_back(param));
     }
     OZ (package_guard.init());
     OX (func_ast.set_db_name(params_.session_info_->get_database_name()));