diff --git a/src/sql/rewrite/ob_key_part.cpp b/src/sql/rewrite/ob_key_part.cpp
index e435768ede..797f00779c 100644
--- a/src/sql/rewrite/ob_key_part.cpp
+++ b/src/sql/rewrite/ob_key_part.cpp
@@ -718,7 +718,6 @@ int ObKeyPart::deep_node_copy(const ObKeyPart &other)
 int InParamMeta::assign(const InParamMeta &other, ObIAllocator &alloc)
 {
   int ret = OB_SUCCESS;
-  vals_.set_block_allocator(ModulePageAllocator(alloc));
   if (OB_UNLIKELY(other.vals_.empty())) {
     ret = OB_ERR_UNEXPECTED;
     LOG_WARN("get invalid in keypart", K(ret));
@@ -745,6 +744,7 @@ InParamMeta* ObInKeyPart::create_param_meta(ObIAllocator &alloc)
   InParamMeta *new_param = NULL;
   if (OB_NOT_NULL(ptr = alloc.alloc(sizeof(InParamMeta)))) {
     new_param = new(ptr) InParamMeta();
+    new_param->vals_.set_block_allocator(ModulePageAllocator(alloc));
   }
   return new_param;
 }
@@ -1031,7 +1031,6 @@ OB_DEF_DESERIALIZE(ObKeyPart)
           LOG_WARN("callocate memory failed", K(ret));
         } else {
           param_meta->pos_ = key_pos;
-          param_meta->vals_.set_block_allocator(ModulePageAllocator(allocator_));
           for (int64_t j = 0; OB_SUCC(ret) && j < val_cnt; ++j) {
             ObObj val;
             OB_UNIS_DECODE(val);
diff --git a/src/sql/rewrite/ob_query_range.cpp b/src/sql/rewrite/ob_query_range.cpp
index bd9b501cc4..80eb273997 100644
--- a/src/sql/rewrite/ob_query_range.cpp
+++ b/src/sql/rewrite/ob_query_range.cpp
@@ -2956,7 +2956,6 @@ int ObQueryRange::prepare_multi_in_info(const ObOpRawExpr *l_expr,
             LOG_WARN("failed to push back param", K(ret));
           } else {
             new_param_meta->pos_ = *key_pos;
-            new_param_meta->vals_.set_block_allocator(ModulePageAllocator(allocator_));
           }
         }
       }
@@ -3103,7 +3102,6 @@ int ObQueryRange::get_single_in_key_part(const ObColumnRefRawExpr *col_expr,
       tmp_key_part->in_keypart_->table_id_ = col_expr->get_table_id();
       tmp_key_part->in_keypart_->is_strict_in_ = true;
       new_param_meta->pos_ = *key_pos;
-      new_param_meta->vals_.set_block_allocator(ModulePageAllocator(allocator_));
       ObSEArray<int64_t, 4> invalid_val_idx;
       bool always_true = false;
       for (int64_t i = 0; OB_SUCC(ret) && !always_true && i < r_expr->get_param_count(); ++i) {