diff --git a/deps/oblib/src/lib/container/ob_2d_array.h b/deps/oblib/src/lib/container/ob_2d_array.h
index 59a0b1d23d..c4cadab7d2 100644
--- a/deps/oblib/src/lib/container/ob_2d_array.h
+++ b/deps/oblib/src/lib/container/ob_2d_array.h
@@ -272,7 +272,7 @@ void Ob2DArray<T, max_block_size, BlockAllocatorT, auto_free,
   if (!use_trivial_ctor) {
     MyOp::array_construct(ptr, cnt);
   } else {
-    memset(ptr, 0, sizeof(T) * cnt);
+    memset(static_cast<void *> (ptr), 0, sizeof(T) * cnt);
   }
 }
 
diff --git a/src/observer/virtual_table/ob_agent_table_base.cpp b/src/observer/virtual_table/ob_agent_table_base.cpp
index f1b87e263b..45611cb81f 100644
--- a/src/observer/virtual_table/ob_agent_table_base.cpp
+++ b/src/observer/virtual_table/ob_agent_table_base.cpp
@@ -126,8 +126,14 @@ int ObAgentTableBase::do_open()
     mapping_.set_block_allocator(ObWrapperAllocator(allocator_));
     FOREACH_CNT_X(c, scan_param_->column_ids_, OB_SUCC(ret)) {
       if (OB_ISNULL(table_schema_->get_column_schema(*c))) {
-        ret = OB_ERR_UNEXPECTED;
-        LOG_WARN("unexpected column id", K(ret), K(*c));
+        if (OB_HIDDEN_TRANS_VERSION_COLUMN_ID == *c) {
+          ret = OB_NOT_SUPPORTED;
+          LOG_WARN("rowscn not supported", K(ret));
+          LOG_USER_ERROR(OB_NOT_SUPPORTED, "rowscn");
+        } else {
+          ret = OB_ERR_UNEXPECTED;
+          LOG_WARN("unexpected column id", K(ret), K(*c));
+        }
       }
     }
     if (OB_FAIL(ret)) {
diff --git a/src/sql/ob_sql_utils.cpp b/src/sql/ob_sql_utils.cpp
index 6d1631197f..ab63ebddea 100644
--- a/src/sql/ob_sql_utils.cpp
+++ b/src/sql/ob_sql_utils.cpp
@@ -5502,7 +5502,7 @@ int ObSQLUtils::check_sys_view_changed(const share::schema::ObTableSchema &old_v
       }
     }
   }
-  if (!changed) {
+  if (OB_SUCC(ret) && !changed) {
     if (OB_FAIL(GCTX.sql_engine_->get_dep_info_queue()
                 .add_consistent_sys_view_id_to_set(old_view_schema.get_tenant_id(),
                                                    old_view_schema.get_table_id()))) {