diff --git a/src/sql/optimizer/ob_explain_log_plan.cpp b/src/sql/optimizer/ob_explain_log_plan.cpp
index 729e9a6d0c..b1df728d1b 100644
--- a/src/sql/optimizer/ob_explain_log_plan.cpp
+++ b/src/sql/optimizer/ob_explain_log_plan.cpp
@@ -131,8 +131,8 @@ int ObExplainLogPlan::check_explain_generate_plan_with_outline(ObLogPlan *real_p
       || OB_ISNULL(sql_ctx = exec_ctx->get_sql_ctx())) {
     ret = OB_ERR_UNEXPECTED;
     LOG_WARN("get unexpected null", K(ret), K(real_plan), K(explain_stmt), K(session_info), K(exec_ctx), K(sql_ctx));
-  } else if (session_info->is_inner()) {
-    /* do not check explain for inner sql (include query in PL) */
+  } else if (session_info->is_inner() || sql_ctx->is_prepare_protocol_) {
+    /* do not check explain for inner sql (include query in PL) and prepare stmt */
   } else if (sql_ctx->multi_stmt_item_.is_part_of_multi_stmt()
              && sql_ctx->multi_stmt_item_.get_seq_num() > 0) {
     /* generate plan call by ObMPQuery::process_with_tmp_context use tmp context, do not check */
diff --git a/src/sql/optimizer/ob_select_log_plan.cpp b/src/sql/optimizer/ob_select_log_plan.cpp
index da3a9748e1..1f7cced460 100644
--- a/src/sql/optimizer/ob_select_log_plan.cpp
+++ b/src/sql/optimizer/ob_select_log_plan.cpp
@@ -7312,6 +7312,11 @@ int ObSelectLogPlan::generate_late_materialization_table_get(ObLogTableScan *ind
     est_cost_info->logical_query_range_row_count_ = 1.0;
     est_cost_info->use_column_store_ = false;
     table_scan->set_est_cost_info(est_cost_info);
+    // set parallel info
+    table_scan->set_parallel(index_scan->get_parallel());
+    table_scan->set_op_parallel_rule(OpParallelRule::OP_INHERIT_DOP);
+    table_scan->set_available_parallel(index_scan->get_available_parallel()),
+    table_scan->set_server_cnt(index_scan->get_server_cnt());
     table_get = table_scan;
   }
   return ret;
@@ -7420,6 +7425,10 @@ int ObSelectLogPlan::allocate_late_materialization_join_as_top(ObLogicalOperator
       join->set_strong_sharding(left_child->get_sharding());
       join->set_interesting_order_info(left_child->get_interesting_order_info());
       join->set_fd_item_set(&left_child->get_fd_item_set());
+      // set parallel info
+      join->set_parallel(left_child->get_parallel());
+      join->set_available_parallel(left_child->get_available_parallel()),
+      join->set_server_cnt(left_child->get_server_cnt());
       join_op = join;
     }
   }