diff --git a/src/sql/ob_sql.cpp b/src/sql/ob_sql.cpp
index 8704d47024..0810e5433d 100644
--- a/src/sql/ob_sql.cpp
+++ b/src/sql/ob_sql.cpp
@@ -4437,6 +4437,8 @@ int ObSql::after_get_plan(ObPlanCacheCtx &pc_ctx,
           param.autoinc_offset_ = session.get_local_auto_increment_offset();
           if (pc_ctx.sql_ctx_.is_do_insert_batch_opt()) {
             param.total_value_count_ = pc_ctx.sql_ctx_.get_insert_batch_row_cnt();
+          } else if (phy_plan->is_plain_insert() && pctx->get_array_param_groups().count() == 1) {
+            param.total_value_count_ = pctx->get_array_param_groups().at(0).row_count_;
           }
         }  // end for
       }
diff --git a/src/sql/resolver/ob_resolver_utils.cpp b/src/sql/resolver/ob_resolver_utils.cpp
index 273a5a22e8..b4fe86dcaa 100644
--- a/src/sql/resolver/ob_resolver_utils.cpp
+++ b/src/sql/resolver/ob_resolver_utils.cpp
@@ -8101,7 +8101,12 @@ int ObResolverUtils::handle_varchar_charset(ObCharsetType charset_type,
   if ((T_HEX_STRING == node->type_ || T_VARCHAR == node->type_)
       && CHARSET_INVALID != charset_type) {
     ParseNode *charset_node = new_node(&allocator, T_CHARSET, 0);
-    ParseNode *varchar_node = new_non_terminal_node(&allocator, T_VARCHAR, 2, charset_node, node);
+    ParseNode *varchar_node = NULL;
+    if (T_HEX_STRING == node->type_) {
+      varchar_node = new_non_terminal_node(&allocator, T_VARCHAR, 1, charset_node);
+    } else if (T_VARCHAR == node->type_) {
+      varchar_node = new_non_terminal_node(&allocator, T_VARCHAR, 2, charset_node, node);
+    }
 
     if (OB_ISNULL(charset_node) || OB_ISNULL(varchar_node)) {
       ret = OB_ALLOCATE_MEMORY_FAILED;