diff --git a/src/sql/optimizer/ob_join_order.cpp b/src/sql/optimizer/ob_join_order.cpp
index bd18f31b50..3046a2b140 100644
--- a/src/sql/optimizer/ob_join_order.cpp
+++ b/src/sql/optimizer/ob_join_order.cpp
@@ -1517,6 +1517,7 @@ int ObJoinOrder::will_use_das(const uint64_t table_id,
                     get_plan()->get_optimizer_context().has_dblink() ||
                     get_plan()->get_optimizer_context().has_subquery_in_function_table() ||
                     get_plan()->get_optimizer_context().has_cursor_expression() ||
+                    get_plan()->get_optimizer_context().has_var_assign() ||
                     is_batch_update_table;
     if (EXTERNAL_TABLE == table_item->table_type_) {
       create_das_path = false;
diff --git a/src/sql/optimizer/ob_log_table_scan.cpp b/src/sql/optimizer/ob_log_table_scan.cpp
index 486b42772a..653dbc2d65 100644
--- a/src/sql/optimizer/ob_log_table_scan.cpp
+++ b/src/sql/optimizer/ob_log_table_scan.cpp
@@ -537,6 +537,10 @@ int ObLogTableScan::extract_pushdown_filters(ObIArray<ObRawExpr*> &nonpushdown_f
         if (OB_FAIL(nonpushdown_filters.push_back(filters.at(i)))) {
           LOG_WARN("push UDF filter store non-pushdown filter failed", K(ret), K(i));
         }
+      } else if (filters.at(i)->has_flag(CNT_ASSIGN_EXPR)) {
+        if (OB_FAIL(nonpushdown_filters.push_back(filters.at(i)))) {
+          LOG_WARN("push variable assign filter store non-pushdown filter failed", K(ret), K(i));
+        }
       } else if (!get_index_back()) {
         if (OB_FAIL(scan_pushdown_filters.push_back(filters.at(i)))) {
           LOG_WARN("store pushdown filter failed", K(ret));
diff --git a/src/sql/resolver/dml/ob_dml_resolver.cpp b/src/sql/resolver/dml/ob_dml_resolver.cpp
index a23fc80369..035dfc5c3b 100755
--- a/src/sql/resolver/dml/ob_dml_resolver.cpp
+++ b/src/sql/resolver/dml/ob_dml_resolver.cpp
@@ -6509,6 +6509,10 @@ int ObDMLResolver::resolve_order_item(const ParseNode &sort_node, OrderItem &ord
     SQL_RESV_LOG(WARN, "index order item not support in update");
   } else if (OB_FAIL(resolve_sql_expr(*(sort_node.children_[0]), expr))) {
     SQL_RESV_LOG(WARN, "resolve sql expression failed", K(ret));
+  } else if (expr->has_flag(CNT_ASSIGN_EXPR)) {
+    ret = OB_NOT_SUPPORTED;
+    LOG_WARN("Not supported variable assignment in order by item", K(ret));
+    LOG_USER_ERROR(OB_NOT_SUPPORTED, "Variable assignment in order by item");
   } else {
     order_item.expr_ = expr;
   }
diff --git a/src/sql/resolver/dml/ob_select_resolver.cpp b/src/sql/resolver/dml/ob_select_resolver.cpp
index 29d50e312e..a16c3cf5f4 100644
--- a/src/sql/resolver/dml/ob_select_resolver.cpp
+++ b/src/sql/resolver/dml/ob_select_resolver.cpp
@@ -1766,6 +1766,11 @@ int ObSelectResolver::resolve_order_item(const ParseNode &sort_node, OrderItem &
       LOG_WARN("ORDER BY item must be the number of a SELECT-list expression", K(ret));
     }
   }
+  if (OB_SUCC(ret) && OB_NOT_NULL(order_item.expr_) && order_item.expr_->has_flag(CNT_ASSIGN_EXPR)) {
+    ret = OB_NOT_SUPPORTED;
+    LOG_WARN("Not supported variable assignment in order by item", K(ret));
+    LOG_USER_ERROR(OB_NOT_SUPPORTED, "Variable assignment in order by item");
+  }
   return ret;
 }